Teses em Zoologia (Doutorado) - PPGZOOL/ICB

URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/3419

O Doutorado Acadêmico foi criado em 1999 e pertence ao Programa de Pós-Graduação em Zoologia (PPGZOOL) do Instituto de Ciências Biológicas (ICB) foi consolidado como um convênio entre Universidade Federal do Pará (UFPA) e Museu Paraense Emílio Goeldi (MPEG).

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Acesso aberto (Open Access)
Abelhas das orquídeas (Apidae: Euglossini) e as plantações de palma de óleo (Elaeis guineensis Jacq.) na Amazônia Oriental: mudanças na composição de espécies, tamanho corporal e diversidade funcional
(Universidade Federal do Pará, 2018-08-02) BRITO, Thaline de Freitas; MAUÉS, Márcia Motta; http://lattes.cnpq.br/0976385386657517; CONTRERA, Felipe Andrés León; http://lattes.cnpq.br/0888006271965925
In this study, we evaluated the role of legal reserves (LR) and areas of permanent protection (APP) in the maintenance of orchid bee species, and we tested the influence of abiotic and habitat parameters on taxonomic and functional diversity of this group. In addition, we investigated the occurrence of phenotypic variations (body and wing size, and fluctuating asymmetry) in response to environmental stress caused by oil palm plantations. Orchid bee males were sampled in nine areas (3 RL, 3 APP, and 3 oil palm plantations) in the municipality of Tailândia, southeast of the state of Pará. In each area, we installed six separate sampling stations, 500 m apart, each one with six scent traps; totaling 36 traps per area, and 108 per habitat type. We compared differences in observed abundance and richness using a One-Way ANOVA, we evaluated species composition patterns with a PCoA, and we also used a species indicator analysis. A partial RDA was applied to evaluate the influence of habitat attributes, space and habitat type on taxonomic and functional parameters of bees. In addition, we compared body and wing size variations of the individuals through the types of habitat. Our results indicate that oil palm areas are characterized by the presence of few individuals and species, low functional diversity, and by larger bees. Despite this, we recorded four species associated to LR, which can be useful indicators of orchid bee’s communities in the Amazon rainforest. The habitat structure was not a good predictor of both functional and taxonomic composition, and no levels of fluctuating asymmetry were detected, but bees from oil palm showed larger wings compared to forest areas. Our research highlights that APPs play an important role in maintaining both taxonomic and functional composition of orchid bees, which could reinforce the fact that bees use these areas as displacement corridors in a matrix formed by oil palm plantation. Thus, both LRs and PPAs areas fulfill their purpose of protecting the biodiversity of orchid bees.
Acesso aberto (Open Access)
Avaliação dos efeitos da plantação de palmas (Elaeis guineensis) na conservação de anuros na Amazônia oriental
(Universidade Federal do Pará, 2017-06-30) CORREA, Fabricio Simões; JUEN, Leandro; http://lattes.cnpq.br/1369357248133029; COSTA, Maria Cristina dos Santos; http://lattes.cnpq.br/1580962389416378
In this thesis, we analyzed the effects of oil palm cultivation (Elaeis guineensis) on taxonomic and functional diversity of anurans in the eastern Amazon. In addition, we analyzed the response of anurans to environmental variation in oil palm plantations and surrounding forests. We surveyed for the presence of anurans in April 2012, 2015 and 2016, in 2100 m² plots through visual and acoustic searches. In April 2016, we also measured microclimatic (air temperature and humidity) and habitat structural variables (water body width and depth, leaf litter depth, canopy openness and number of trees) in both habitat types. We found higher functional diversity and species richness in forests, with difference in species composition and functional characters distribution between forests and oil palm plantations. Water body depth and width positively affected species richness and number of individuals, while water body depth and diurnal temperature influenced species composition in oil palm plantations. Only number of individuals was positively affected by diurnal temperature and nocturnal humidity in forests, while species composition and richness were not affected by any environmental variable in this habitat type. Our results make clear that conversion of forests to oil palm plantations negatively affects anurans taxonomic and functional diversity, making urgent the maintenance of forests surrounding the plantations as a way to reduce the negative impacts.
Acesso aberto (Open Access)
Avaliação dos efeitos de monocultura de palma de dendê na estrutura do habitat e na diversidade de peixes de riachos amazônicos
(Universidade Federal do Pará, 2018-03-30) RUFFEIL, Tiago Octavio Begot; MONTAG, Luciano Fogaça de Assis; http://lattes.cnpq.br/4936237097107099
In the Amazon, oil palm plantation has been growing exponentially in recent years, altering the landscape natural characteristics and being a possible threat to biodiversity. This environmental impact extends to aquatic ecosystems, which because they are highly related to the adjacent vegetation, also suffer the impacts resulting from this agricultural action, such as habitat structure alterations, affecting the species distribution and ecosystem processes. Thus, studies to test the impact of this monoculture in the Amazon are important to support more efficient strategies for reducing impacts and maintaining biodiversity. Therefore, this thesis aims to answer the following questions: I) How the presence of oil palm cultivation around the streams affect their habitat structure and fish assemblage structure in relation to streams that drain through forested areas present along of this anthropogenic landscape? II) What are the effects of the substitution on landscape of primary forest on the oil palm in the habitat physical structure and on the taxonomic diversity of neotropical stream fish? III) How do the patterns of taxonomic and functional diversity of Amazon stream fish assemblages responds to the habitat and landscape changes caused by oil palm plantation? To answer these questions, we sampled and analyzed 39 streams in the Eastern Amazon. For the habitat characterization, an extensive protocol of the evaluation was applied, resulting in 238 habitat variables, besides that, was used landscape characteristics based on the percentage of land uses adjacent to the streams. For fish collection was used hand net for six hours in each stream. Morphological measures and ecological information of fish species were taken for later calculation of the functional attributes related to the third chapter. The results showed that oil palm plantation affect the stream habitat structure, modifying mainly the channel morphology, the substrate structure and shelter availability, such as woods and roots, for fish assemblage. Consequently, the fish species distribution was affected, resulting in changes in the assemblage structure. On the other hand, no changes were registered in the functional structure of these assemblies. Finally, we showed that the oil palm plantation modifies the stream habitat natural characteristics, as well as the distribution of the species, however the functional structure of the fish assemblages is maintained.
Acesso aberto (Open Access)
Contaminação de Podocnemis unifilis (Testudines: Podocnemididae) por agrotóxicos e mercúrio na bacia do Rio Xingu, Brasil
(Universidade Federal do Pará, 2017-02-16) PIGNATI, Marina Teófilo; PIGNATI, Wanderlei Antonio; http://lattes.cnpq.br/1262870406586508; PEZZUTI, Juarez Carlos Brito; http://lattes.cnpq.br/3852277891994862
The occupation policy in the north of the state of Mato Grosso and in the state of Pará, through activities such as gold mining, pasture and subsequent agricultural activities, caused a landscape change and habitat contamination. Pesticides, for example, are on the environment as a result of their use in agriculture and mercury (Hg) is mobilized into the environment through mining, deforestation and biomass burning activities. These contaminants are highly persistent and biomagnifies at each trophic level. Chelonian, because they are long lived organisms can accumulate toxic substances for long periods, are important contamination monitors. Podocnemis unifilis, a chelonian species with wide distribution in the Amazon basin, represent an important resource for riparian and indigenous populations, with wide distribution in the Xingu River basin. This study investigated the landscape changes, contamination of pesticides and Hg in P. unifilis in the Xingu River basin. We selected locations with rivers sources or tributaries in the Xingu River basin, in the states of Mato Grosso and Pará, describing the planted area and the use of pesticides in cotton, sugarcane, corn and soybean crops, as well as deforestation and biomass burned in the historical series from the years 2005 to 2014. Between September and December 2014 fifty specimens of P. unifilis were captured for liver, muscle and adipose tissue. Were evaluated 14 active ingredients of organochlorine pesticides by gas chromatography/electron capture detector (GC/ECD), and total Hg (THg) in the tissues of P. unifilis by cold-vapor atomic absorption (CVAA) spectroscopy. It has been shown that agricultural production as well as the use of pesticides in the Xingu river basin in the state of Mato Grosso are increasing every year, and the most commonly used pesticide was Glyphosate in 2014 (8,055,248 liters). Analyzing the states separately, Glyphosate, Metamidofos, Atrazine, 2,4 D and Endosulfan were the pesticides most used in the state of Mato Grosso and, in Pará state, were Atrazine, Glyphosate, Endosulfan, Chlorpyrifos and Tebuconazole respectively. The states of Mato Grosso and Pará had a significant increase in deforestation and biomass burning between the years researched (2005-2014), especially the city of São Félix do Xingu with 17,686.20 km² deforested only in 2014 and Feliz Natal with a 272% increase in the biomass burning in the last year researched (2014). Eight pesticides were found in the tissues of P. unifilis, including isomers and metabolites (values as mean ± standard deviation): Lindane = 1.39±8.46 ng/g-1; p,p’-DDT = 20.32±24.54 ng/g-1; p,p’-DDD = 4.00±6.96 ng/g-1; p,p’-DDE = 0.95±1.15 ng/g-1; o,p’-DDT = 0.90±3.97 ng/g-1; α-Endosulfan = 3.45±17.73 ng/g-1; β-Endosulfan = 3.81±8.01 ng/g-1; and Endosulfan sulfate = 7.12±12.05 ng/g-1. THg was detected in all specimens (liver: 134.20 μg/g-1, muscle: 24.86 μg/g-1). The type of tissue influenced the concentration of pesticides and THg, and the contamination variations of P. unifilis by pesticides and THg in the tissues were not explained by the interaction between sex and the straight-line carapace length. Comparing the results with current national and international legislation for protein resources, it was verified that the specimens of P. unifilis presented concentrations of pesticides greater than the maximum residue limit for Lindane, ΣDDT and ΣEndosulfan and Hg concentration 100 times greater than the acceptable maximum. It was concluded that the crops are "agrochemical-dependent" and that specimens of P. unifilis are contaminated with organochlorine pesticides and Hg. Riparian and indigenous population of the Xingu River basin that consumes these chelonians may be gradually contaminated, with future consequences for health.
Acesso aberto (Open Access)
Determinantes da estrutura de comunidades de insetos aquáticos em riachos na Amazônia: o papel do habitat e da escala especial
(Universidade Federal do Pará, 2017-01-30) BATISTA, Gilberto Nicacio; HAMADA, Neusa; http://lattes.cnpq.br/1512994126787334; JUEN, Leandro; http://lattes.cnpq.br/1369357248133029
Aquatic ecosystems are highly complex environments, mainly due to interactions between their abiotic and biotic components; they are dependent on variation in physical structure and limnological characteristics, which in general, are factors that specifically act on different spatial and temporal scales. Therefore, considering this complexity in structuring stream habitats, particularly in Amazonian lotic ecosystems, this doctoral thesis aims to evaluate which are the determining factors to structure aquatic insect communities and their distribution according to environmental variation and geographical distances. To meet this goal the thesis is divided into four chapters. In the first, a systematic revision was carried out with a global assessment about the use of insects (Chironomidae: Diptera) in monitoring aquatic ecosystems and their responses as bioindicators. We found that the main issues presented in the studies were related to anthropogenic impacts on aquatic ecosystems and the taxonomic difficulties on the use of species identification to biomonitoring. The second shows analysis of distribution patterns and diversity of Chironomidae communities, under predictions of Metacommunity models, to evaluate the relations of the assemblages with the spatial scale and the environment. The main results showed that the assemblages were mainly affected by components of the physical habitat structure and partly the communities were limited by dispersal among the streams when considered at large scale in the region studied. The third showed analysis of functional composition on the communities of aquatic insects (Coleoptera, Diptera, Ephemeroptera, Hemiptera, Lepidoptera, Megaloptera, Odonata, Plecoptera, Trichoptera) and their responses to variation in habitat structure considered under the assumptions of the Habitat Templet. Overall, we found relationships between the distribution of morphological and functional traits with the physical habitat variables. The fourth chapter evaluates the effect of spatial distance on the community similarity of Ephemeroptera, Trichoptera, Plecoptera communities in two regions of Eastern Amazon. In this final chapter, we find differences in the composition of communities expressed as species replacement because of the geographical distance and local environmental characteristics of each region. Finally, the studies developed in this thesis summarized how the structure of the habitat of streams can affect the aquatic insect communities and variation in the riparian structure and physical habitat, can cause variation in taxonomical composition and functional attributes. In summary, from these findings, we conclude that the physical habitat variables are determining factors in structuring aquatic insect communities. In addition, it is highlighted the importance of local factors (riparian vegetation structure/composition of substrates/limnological characteristics) as explanatory variables for taxonomical and functional composition. In addition, the regional factors (geographical distance / dispersal limitation) are essential components to affect similarity and structure of the communities.
Acesso aberto (Open Access)
Distribuição e abundância de médios e grandes mamíferos na Amazônia central
(Universidade Federal do Pará, 2015) RAVETTA, André Luís; ALBERNAZ, Ana Luisa Kerti Mangabeira; http://lattes.cnpq.br/1220240487835422
Medium and large mammals are an important protein source for many human populations, and, depending on the species, their populations may suffer reductions related to hunting and consumption, habitat degradation or both. The distribution and abundance of these animals can vary with the quality and quantity of the surrounding forests (influence of natural and human factors). The study of this variation may help define public policies for the management and conservation of species and to analyze the effectiveness of protected areas. This study aimed at improving the knowledge of the medium and large mammal distribution patterns in order to evaluate a public policy for the western part of the Para State, which was the implementation of Sustainable Forest District of BR-163. In a study case, the geographical distribution of a species of primate, the white marmoset (Mico leucippe) was expanded based on new records for the region. The Maximum Entropy algorithm was used to predict the potential distribution of species based on its potential ecological niche and assist in defining the geographical boundaries for future surveys. The result of this study served as a parameter for reviewing the conservation status of the species, which had its status changed to the category of "Least Concern" in the national and the IUCN Red lists. In the second part of the study population surveys were conducted to identify the factors influencing the pattern of distribution and abundance of medium and large mammals. For this purpose, densities of species were estimated based on linear transects surveys and analyses of the relation between the density distribution and environmental variables, such as temperature, rainfall and altitude, and anthropogenic variables, as a percentage of deforestation, distance to cities and towns, and distance to roads. There was low variation in species abundance along the DFS of the BR-163, and variation in responses depending on the species, but in general there was influence of rainfall (average annual rainfall and rainfall in the dry season) and anthropogenic factors (proximity roads) on density variation. Increment in the sampling 11 effort was analyzed for the most abundant species and has led to increased precision in the density estimation but did not indicate substantial change in the estimate. The relationships found were not strong enough to allow a generalization about the area, but the results establish a parameter for future comparisons, given the good condition of the sampled areas. This was the first study of mammals in the region for that scale, which matched an actual public policy for the region.
Acesso aberto (Open Access)
Ephemeroptera (Insecta) no Brasil: estado da arte, amostragem, influências e distribuição
(Universidade Federal do Pará, 2015) FEITOZA, Yulie Shimano; JUEN, Leandro; http://lattes.cnpq.br/1369357248133029
In this thesis we aimed to contribute to the ecological knowledge about the Ephemeroptera order in Brazil in order to decrease Wallacean, Prestonian and Hutchinsonian shortfalls related to these organisms. For this purpose, we worked with bibliographic data and field sampling, which resulted in six chapters. We summarized bibliographic information about Brazilian Ephemeroptera studies in the first chapter and for the others, we used data from collections performed in Brazilian Amazonia, also for the last chapter, we have used both dataset from collected and bibliographic source. In the first chapter, we performed a scienciometric analysis about Ephemeroptera studies in Brazil, then we have found the main gaps: absence of studies in some Brazilian states and records of families, need of studies about phylogeny, need of improvement of taxonomic resolution in ecological studies, and deficit of knowledge about environmental variables affecting Ephemeroptera distribution. In the second chapter, we proposed new sampler (circular handnet) and sampling design (150-meters along streams) to be used in ecological studies. We tested in the third chapter the effectiveness of our own methodology, where applied to verify whether 15 subsamples are enough to represent mayflies fauna (instead 20 subsamples), also discontinuos sampling are better than continuous, and if the taxonomic resolution between species and genera are highly concordants. In the fouth chapter, the community was analysed in a regional scale, where we verified differences in environment structure of streams and species composition according to interfluves and scales (local or regional). In the fifth chapter, we tested if River Hypothesis is valid for mayflies communities in Brazilian Amazon, where we found the largest rivers acting as geographic barriers structuring mayflies distribution, as well as the connection of drainage basins also affected Ephemeroptera distribution. Finally, in the last chapter we made a study of case through a new approach of Threshold Indicator Taxa Analysis (TITAN). In this chapter, we found Miroculis as a genus associated to forested areas while Ulmeritoides was associatedrelated to oil palm plantation areas;With this thesis, we increased records and knowledge of Amazonian mayflies, by reducing gaps in relation to distribution (Wallacean deficit), abundance (Prestonian defict) and environmental answers from these organisms (Hutchinsonian deficit).
Acesso aberto (Open Access)
Estresse oxidativo de aves em clareiras naturais e sub-bosque na região Amazônica
(Universidade Federal do Pará, 2013) GOMES, Andreza de Lourdes Souza; SILVA, José Maria Cardoso da; http://lattes.cnpq.br/6929517840401044
Background: (Oxidative stress of birds in natural gaps and understory sites in the Amazon region). Studies that provide information about the distribution of birds in different phases of forest mosaic are essential for understanding the maintenance of biodiversity, since natural gaps play a central role on the structure and dynamics of tropical forest. Objectives: (a) to determine and compare the abundance and richness of frugivorous birds between the natural gap and understory habitats; (b) verify and associate the abundance of frugivorous birds with the availability of fruits in both areas; (c) to investigate the echophysiological interactions between the oxidative stress and the distribution of specimens of Dixiphia pipra and Willisornis poecilinotus, to determine which factors account for the variance of biomarkers of oxidative stress in these species. Methods: This study was carried out from November 2010 to October 2011 in terra firme forest sites at the National Forest of Caxiuanã, Melgaço, Pará, Brazil. Two different understory forest habitats were selected for sampling on the basis of physiognomies: natural tree fall gap and undisturbed forest. Twelve (12) sites were selected (6 natural gaps and 6 undisturbed continuous forests). In each site, groups of 10 mist nets were set at ground level which remained open from 6:00am to 2:00pm for two consecutive days, totaling six days each month. This procedure lasted for 12 months and the sampling effort totaled 23,040 mist net hours. All specimens captured were identified, marked with metal rings and kept in cotton bags. We collected blood, feces and regurgitation samples to determine the biomarkers of oxidative stress and the composition of the diet. The relationship between thiobarbituric acid reactive substances and the total antioxidant capacity was used as an index of oxidative stress. The vegetation structure was determined based on transects along the mist nets; the plants bearing fruits were identified and the total antioxidant capacity was determined in each plant. Results: During the period of the study 347 specimens of 21 species were sampled. The assemblage of frugivorous birds in natural gap is distinct from that of undisturbed forest sites. The species responsible for dissimilarity were Dixiphia pipra, Pipra rubrocapilla and Turdus albicollis. The richness of birds was similar in both sites, but the availability of fruits and the total capture index were higher in natural gaps. The primary frugivores (those whose feces or regurgitation always showed fruit pulp or seeds) occurred mainly in natural gaps, where the most abundant species was Dixiphia pipra. In addition, Pipra rubrocapilla was the most abundant species in undisturbed sites. Thirty-six (36) species of plants bearing fruits were recorded, and the abundance of frugivorous birds was significantly correlated with the number of plants bearing fruits in natural gaps, where the most common species of plants were: Psychotria colorata and Psychotria iodotricha. On the other hand, Faramea anisocalyx and Virola surinamensis were the most common species in undisturbed sites. The variation of biomarkers of oxidative stress in specimens presenting lek behavior varied with gender and to the site of sampling. In natural gaps, the adult males of Dixiphia pipra showed higher levels of oxidative stress. The high metabolic rate resulting of flight effort to avoid predators, courtship behavior to the female and territory defense, can increase the production of pro-oxidant compounds. However, the ingestion of fruits with high content of antioxidant compounds by male can minimize the deleterious effects of oxidative stress. The variance of oxidative stress of species that do not have organization in leks was associated only with the site of sampling. The specimens sampling in natural gaps showed higher levels of oxidative stress. This can be due to the increase in metabolic rate to avoid predators as well as new flight strategies for foraging.
Acesso aberto (Open Access)
Estruturação da comunidade de odonata (insecta) na Amazônia Oriental: efeitos espaciais, ambientais e morfológicos em igarapés íntegros e alterados
(Universidade Federal do Pará, 2015-12-04) OLIVEIRA JUNIOR, José Max Barbosa de; JUEN, Leandro; http://lattes.cnpq.br/1369357248133029
Acesso aberto (Open Access)
Filogenia, biogeografia e história evolutiva dos macacos-prego, gênero Sapajus Kerr, 1792 (Primates: Cebidae)
(Universidade Federal do Pará, 2016-07-31) LIMA, Marcela Guimarães Moreira; ALEIXO, Alexandre Luis Padovan; http://lattes.cnpq.br/3661799396744570; SILVA JÚNIOR, José de Sousa e; http://lattes.cnpq.br/4998536658557008
In a recent study, using ecological, morphological and molecular data, Cebus and Sapajus were recognized as two distinct genera. Although Sapajus is one of the most studied genera of Neotropical primates, it has one of the most confusing taxonomic histories among Neotropical mammals. Until recently, there was little information in the literature about the origin and diversification of the species assigned to the genus Sapajus. Despite recently published studies on the subject, there is still no robust hypothesis about the origin and evolution of this group. In this study, our first aim was to examine capuchin monkey diversification using the most taxonomically and geographically complete molecular dataset to date for the group. We reconstruct a time-calibrated molecular phylogeny for capuchins under Bayesian inference from three mitochondrial genes (D-loop, Cytb e COI). Our results support vicariance between ancestral populations in the Andes and Amazon (ancestral Cebus) versus the Atlantic Forest (ancestral Sapajus), and a Pleistocene “Amazon invasion” by Sapajus that explains the present day sympatry of Cebus and Sapajus. Our second aim was to assemble the first phylogenomic data set for robust capuchin monkeys using ultra-conserved elements (UCEs) and construct a complete phylogeny for the genus. We extracted SNPs from the UCE data set, and we created phylogenies using Bayesian and Maximum Likelihood methods. Our analyses provide strong support for Cebus and Sapajus as two reciprocally monophyletic clades. Within Sapajus, our SNPs trees recovered six species: S. xanthosternos, S. robustus, S. nigritus, S. flavius, S. libidinosus and S. apella (including S. cay and S. macrocephalus). As morphological and molecular subdivisions of the Amazonian group are discordant, we recommend lumping all Amazonian and southern grassland robust capuchin taxa as S. apella without subspecies.
Acesso aberto (Open Access)
Heterogeneidade ambiental e diversidade de peixes de riachos na Amazônia
(Universidade Federal do Pará, 2017-09-07) BENONE, Naraiana Loureiro; MONTAG, Luciano Fogaça de Assis; http://lattes.cnpq.br/4936237097107099; ESPOSITO, Maria Cristina; http://lattes.cnpq.br/2112497575917273
Amazon streams are highly heterogeneous systems that encompass a remarkable diversity. Due to the increasing threats to these systems, it is necessary to understand how ecological process in natural areas affect streams and their fish biota. This thesis was divided in three chapters and aims to answer the following questions: 1) How much do catchment variables affect the physical habitat of small streams in the Amazon? 2) What is the relative contribution of environmental and spatial variables on taxonomic and functional alpha and beta diversity of stream fish? 3) How much are distinct components of biodiversity (species diversity, taxonomic distinctness, and functional diversity) congruent and how much can they be predicted from catchment variables? Fifty seven streams were sampled across six river basins in the Amazon region. For environmental characterization, a standardized protocol was used to obtain more than 140 local variables, and 11 catchment variables were obtained from aerial images. Fish assemblages were sampled with hand nets during a six-hour period. Stream catchments were divided in two groups based on altitude and slope. These two variables influenced streams habitats, regulating flow velocity and the types and proportions of substrates. The taxonomic and functional patterns of fish assemblages were affected by environmental filters operating at the catchment scale. Nonetheless, variables at the local scale were particularly important to taxonomic and functional alpha diversity. Despite the significant role of environmental filters, limited dispersal was the main driver of variation in fish diversity, indicating a strong biogeographic factor. Finally, various components of diversity exhibited intermediate congruence, which suggests that no single component can describe patterns of fish diversity. In addition, catchment variables alone could not accurately predict diversity patterns, and therefore it is recommended that additional explanatory variables, including descriptors of local environmental conditions, are important to include in studies of stream fish diversity.
Acesso aberto (Open Access)
Influência de diferentes práticas de uso da terra sobre a fauna de riachos amazônicos
(Universidade Federal do Pará, 2019-02-27) SOUSA, Híngara Leão; MONTAG, Luciano Fogaça de Assis; http://lattes.cnpq.br/4936237097107099
Disturbances caused by land use practices lead to several negative effects on stream biodiversity. This dissertation was developed to contribute with information about the land use effects on Amazonian stream biodiversity. The dissertation was subdivided in three chapters. First, it was performed a review of articles that evaluated the land use effects on stream fauna in the Amazon in the last 25 years to show the scenario of scientific research for these ecosystems in the region. In the Chapter 2 the aim was to assess the effects of three land use practices (managed and convenctional logging, and pasture) on stream fish, considering the impacts on the community structure and niche characteristics of species. In the Chapter 3 the aim was to evaluate the ecological uniqueness of fish assemblages in these areas, in order to identify the land uses and species that more contribute to beta diversity in the region. As general results of the first Chapter, 42 articles evaluating the land use effects on stream fauna communities in the Amazon were found in the literature, mainly in areas of timber extraction. Recently, there has been an increase in studies, and only the last four years accounted for 74% of articles. However, we identified a lack of information about the land use history in the studied areas, a lack of studies using only the crustacean as a bioindicator taxon and a few multi-taxon studies. Chapter 2 showed that conventional logging and pasture had negative impacts on fish communities, and no effect was observed in managed logging areas. Additionally, pasture was mainly responsible for the separation of niche species, supporting species with higher marginality and smaller niche breadth. Finally, in the Chapter 3 was found higher contribution of pasture area to beta diversity, mainly due to the great variation in the disturbance levels associated to this land use practice. Besides that, both habitat specialist and generalists contributed to beta diversity in the area. In conclusion, the results of this dissertation have shown that different kinds of land use may result in particular effects on stream communities. Our findings also suggest that different approaches using information on stream biodiversity are useful in environmental impact assessment in these ecosystems.
Acesso aberto (Open Access)
Interação de Ucides cordatus Linnaeus, 1763 em manguezais da Ilha de Marajó: uma abordagem ecológica
(Universidade Federal do Pará, 2012) GOMES, Cleidson Paiva; FERNANDES, Marcus Emanuel Barroncas; http://lattes.cnpq.br/8943067124521530
The present study was carried out in the mangroves of Soure, Marajó Island, Pará, Brazil, where the great amount of freshwater intake allows the development of transition zones estuary/river defining the geobotanic limits for mangroves in the state of Pará and, hence, for the leaf-removing mangrove crab (Ucididae). For an ecological approach on the interaction between U. cordatus and mangrove forests the following issues were investigated: i) the relationship between the population characteristics of U. cordatus and different transition levels along the gradient of vegetation between mangrove forests and tidal valley forests, ii) the influence of environmental factors of such transition zones on patterns of size and density of U. cordatus population, iii) the impacts of herbivory of U. cordatus on the seedlings production and the possible effects on recruitment process of these seedlings for mangrove forests. Study sites were classified according to the transition level of the tidal várzea forests, and these values correlated with density and size values of U. cordatus population. In each study site the availability of food by litterfall rates, salinity, and indicators of fishing activities on these areas were determined. The impact of U. cordatus on the recruitment of mangrove stands was evaluated by estimating the rate of herbivory and predation on propagules. The results reveal that in the zone of "high transition" local conditions seem to limit U. cordatus stocks, showing that the density of this species population is much lower compared to those recorded in the "low transition" zone. However, areas of high transition offer more favorable conditions for development of the leaf-removing mangrove crab populations, especially with regard to the variability and availability of food and protection from human action in the region. The indicators of fishing activity on U. cordatus revealed that the mangrove forests of the lower transition zone are more subject to overexploitation, mainly for ease of access. The main via of impact on propagules was the consumption rate of 60%, being the rate of export of propagules by tides of only 1%, thus less relevant. U. cordatus may be considered the most important impact agent on the propagules production of these mangrove forests without showing selectivity by size or maturity of seedlings, being important in the regulation of recruitment rates and, hence, in the population dynamics of Rhizophora’s trees in the mangrove forests on the coastal zone of Marajó Island, in the Brazilian Amazon.
Acesso aberto (Open Access)
Padrão de distribuição de Odonata (Insecta) em sistemas aquáticos com exploração de madeira na Amazônia Oriental: seleção de microhabitat e características morfológicas das libélulas
(Universidade Federal do Pará, 2017-01-06) CALVÃO , Lenize Batista; JUEN, Leandro; http://lattes.cnpq.br/1369357248133029; LOPES, Maria Aparecida; http://lattes.cnpq.br/3377799793942627
Acesso aberto (Open Access)
Padrões de distribuição de espécies de percevejos semi-aquáticos (Hemiptera: Gerromorpha): utilizando fatores ambientais e espaciais para determinar a estrutura das comunidades em riachos amazônicos
(Universidade Federal do Pará, 2018-08-02) CUNHA, Erlane José Rodrigues da; JUEN, Leandro; http://lattes.cnpq.br/1369357248133029
Amazonian lotic ecosystems are among the environments that have received most attention in studies on species distribution. This is related to the presence of high environmental complexity and spatial variation in these ecosystems, thus it is necessary to elucidate how such conditions affect the species distribution in response to habitat specificity and dispersion under different scales. Thus, in this thesis we aim to evaluate how environmental and spatial factors structure semi-aquatic bug (Hemiptera: Gerromorpha) communities in Amazonian streams. To achieve this goal, the thesis was divided into three chapters. First, we evaluated factors that structure metacommunities, considering environmental factors, linear and fluvial spatial structure within a drainage basin. We observed that the effect of the environment had greater effect on metacommunity structure and only factors related to river dispersion were important for these response. Thus, at basin scale, the metacommunity structure was affected mainly by species sorting and mass effects was associated to dispersion in smaller scales within basin network. In second chapter, we analyzed the patterns of metacommunities of semiaquatic bugs among different biogeographic areas of the Amazon region, we found that the limitation of community variation across space was decisive in structuring the diversity of assemblies. These results showed that high turnover occurs within the ecoregions evaluated due to environmental heterogeneity. In addition, beta diversity between different biogeographic areas in Amazon region evidenced general patterns of decay of similarity due to environmental and spatial distances. In the third chapter, we deconstructed the assemblages between wingless and winged individuals to evaluate the alteration of the environment in areas with anthropic alteration. We find that the composition of winged species assemblages differs from the total community composition, however, assemblages of winged and winged species showed responses associated with the loss of diversity caused by anthropic activity. However, the environmental variables that structure these assemblies were different, indicating that a trade-off occurs between reproduction (wingless) and dispersion (winged) to reach the fitness of these populations. In general, we highlight that characteristics of the aquatic habitat on a local scale, and the fluvial connectivity between habitats are the main determinants in structuring the communities of these organisms at a basin scale. Considering biogeographic scales, the limitation of the dispersion through space was the main factor in the structure of the communities, however, the beta diversity between regions also showed to be dependent on local factors. We consider that the specificity of these organisms to live on the surface of the water, besides showing strong relation with this habitat, also shows that the locomotion on the water surface is the main dispersion mechanism of these organisms in the basin network. In addition, the processes that have determined communities' patterns of diversity act on local scales up to biogeographic scales. However, we highlight that advances in the impacts of anthropic activities in the Amazon can also interfere in these processes and act on the distribution of species among the lotic ecosystems of the region.
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Padrões de diversidade e suas implicações para a conservação de Odonata (Insecta) em igarapés amazônicos
(Universidade Federal do Pará, 2018-08-03) BRASIL, Leandro Schllemmer; JUEN, Leandro; http://lattes.cnpq.br/1369357248133029
The distribution of species within a landscape and the mechanisms that determine this distribution are fundamental questions for the understanding of the ecology of biological communities. The understanding of these phenomena is essential for the management of ecosystems and decision-making on the conservation of biodiversity, environmental conditions, and ecosystem resources. In this dissertation, we focused on the communities of the damselflies, suborder Zygoptera (Insecta: Odonata), found in streams in the Brazilian Amazon region to investigate their alpha diversity (Chapter 1), beta diversity (Chapter 2), and the elements that structure metacommunities (Chapters 3), as well as the spatial priorities for the conservation of Amazonian odonates (Chapter 4). We used environmental, biogeographic, and spatial predictors to investigate the mechanisms that structure the distribution of the communities analyzed in this dissertation. In the case of alpha diversity (Chapter 1), environmental heterogeneity (climate) and primary productivity were the most important determinants of zygopteran species richness. For beta diversity (Chapter 2), turnover was the most important component of changes in species composition within the landscape, together with the spatial distance between sites, and the biogeographic region (centers of endemism), which were the most important predictors of zygopteran beta diversity. In our analysis of metacommunity patterns (Chapter 3), we found a Clementsian pattern in well-preserved streams, with a major change in the configuration of the communities in streams with environmental alterations, which represented subsets of the better preserved areas. In Chapter 4, we show that the spatial distribution of the conservation units in the Amazon region is relatively ineffective for the conservation of most of the beta diversity of the region’s odonates. As the priority areas are located predominantly in southern Amazonia, and most of these areas have already been deforested, given that they lie within the arc of deforestation, the priority areas were displaced toward the forested environments located nearer the center of the Amazon region. Based on this analysis, we suggest the creation of new conservation units or the implementation of incentives for the establishment of activities that cause reduced environmental impacts in more central, priority areas, which are still forested, as well as 4 the restoration of priority areas that have already been deforested. One possibility here would be the implementation of programs that pay for ecosystem services, such as carbon credits obtained through reforestation and/or the development of activities with a reduced impact on biodiversity, such as agroforestry. This study also makes a major contribution to the reduction of the Wallacean and Hutchisonian shortfalls on the zygopterans of the Brazilian Amazon region.
Acesso aberto (Open Access)
O peixe boi da Amazônia no baixo Javari, AM - Brasil: conhecimento local, uso de habitat e conservação
(Universidade Federal do Pará, 2015-06-19) PANTOJA, Tatyanna Mariucha de Araujo; KENDALLl, Sarita; QUEIROZ, Helder Lima de; http://lattes.cnpq.br/3131281054700225
Trichechus inunguis plays an important role in food webs and dynamics of water bodies where it lives. It’s ecological importance has not stopped the species from suffering a intense process of hunting despite the legal protection since the decade of 60. The observation of the occurrence of the species in parts of the Javari and Quixito rivers, near the county of Atalaia do Norte, and the registers of hunting events in the region led this research. The research aimed to carry out a study on aspects of local knowledge, habitat use and conservation of T. inunguis in order to support the definition of strategies for their conservation in the lower Javari region, Amazonas, Brazil. The first chapter aimed to compare local knowledge and documented scientific knowledge of the Amazon Manatee. In order to achieve this, interviews were conducted with riverine residents of Atalaia do Norte municipality, or communities or isolated houses along stretches of the Javari river, Itacoaí and Quixito. 50 interviews were conducted covering topics as morphology, metabolism and age, breathing, feeding and migration, breeding and intraspecific interactions. The content of the Compared Cognition Tables (CCT) resulted in an average adhesion value of 0.6. This result demonstrates that it is possible to recognize in reports and utterances of the study population, the existence of cognitive codes perfectly capable of dialoguing with scientific knowledge, indicating the possibility of collective construction of measures geared toward the conservation of the species. The second chapter aimed to investigate local knowledge on the occurrence sites of the species. For a year a sampling was conducted at excerpts from Javari rivers, Quixito and Itacoaí to investigate the suitability of using this type of knowledge on measures directed to the study of the species in the wild. In addition, the study has looked to investigate the effect of environmental variables related to the occurrence of T. inunguis in the study area. Therefore, we use Generalized Linear Models (GLM) to model the distribution of T. inunguis using presence and absence data in sites located within the study area and its relation with variables of environmental and anthropogenic order. We recognize, based on the observed results, the potential of local knowledge about the occurrence sites (detection success rate of occurrence of the sites listed as of the occurrence of the species evidence was 37.66%, in contrast to 1.43 % of sites listed as non-occurrence of the manatee). Therefore consider their owners as key elements in the development of ecological studies of the species, and that should be incorporated into protective actions to these animals. The variable components of the model built (EVD ~ SIT + LARG + DIST.ATN + COM + EMB1 + FLOR.ALAG) validate its objective basis. Furthermore, the model demonstrates that the methodology is capable of replication in similar cases. Still, recommendations regarding data collection bearing in mind the intrinsic features of each variable analyzed (geographical configuration of the sampled rivers, use that animals do the flooded forest, effect of sightings closest communities) are made to maximize potential the use of explanatory models the occurrence of the species, thereby creating greater biological reliability of results. The third chapter raised the species mortality data and studied the perception of the region bordering population on it’s conservation. Individuals contacted for the first component of the study were applied questions about the animals, their relationships with other species, the mythical body of knowledge about the species, their uses, the risks to which it is subject, and the threat of its extinction. A survey was done (by direct observation, participant or not) on mortality of manatees in the study area, and the various causes of deaths recorded. To analyze the perception we used the Discourse of the Collective Subject (DCS). Mortality data were recorded and analyzed descriptively. Impressions beforehand to the questions were mostly positive (73%), and even the negative (27%) can base discussions on conservation actions regionally. The data on the risks and T. inunguis mortality brings evidence that the hunting of these animals still occurs materially and locally and this is an aspect that requires further studies in this regard. Studies are recommended regarding population ecology and dynamics of species populations in the area, under the action of an additional source of mortality: the hunting factor.
Acesso aberto (Open Access)
Revisão taxonômica do gênero Actinopus perty, 1833, com a descrição de quatro espécies novas de Missullena walckenaer, 1805 (Araneae, Mygalomorphae, Actinopodidae)
(Universidade Federal do Pará, 2014-03-06) MIGLIO, Laura Tavares; Pérez-Miles, Fernando; BONALDO, Alexandre Bragio; http://lattes.cnpq.br/8721994758453503
Actinopus Perty, 1833 is characterized and redescribed, harboring sixty-three species occurring from Panama to Argentina. Seventeen previously known species are redescribed: A. tarsalis Perty, 1833; A. rufipes (Lucas, 1834); A. longipalpis C. L. Koch, 1842; A. nattereri (Doleschall, 1871); A. insignis (Holmberg, 1881); A. crassipes (Keyserling, 1891); A. robustus (O. Pickard-Cambridge, 1892); A. wallacei F. O. P.- Cambridge, 1896; A. princeps Chamberlin, 1917, A. xenus Chamberlin, 1917; A. fractus Mello-Leitão, 1920; A. paranensis Mello-Leitão, 1920; A. pusillus Mello-Leitão, 1920; A. dubiomaculatus Mello-Leitão, 1923; A. trinotatus Mello-Leitão, 1938; A. cucutaensis Mello-Leitão, 1941; and A. echinus Mello-Leitão, 1949. Forty-four new species are described: Actinopus castelo n. sp., A. apalai n. sp., A. mairinquensis n. sp., A. obidos n. sp., A. buritiensis n. sp., A. pinhao n. sp., A. ducke n. sp., A. hirsutus n. sp., A. jaboticatubas n. sp., A. confusus n. sp., A. pampulha n. sp., A. candango n. sp., A. paraitinga n. sp., A. cornelli n. sp., A. vilhena n. sp., A. harveyi n. sp., A. itapitocai n. sp., A. ipioca n. sp., A. itaqui n. sp., A. xingu n. sp., A. mesa n. sp., A. caxiuana n. sp., A. utinga n. sp., A. emas n. sp., A. bocaina n. sp., A. guajara n. sp., A. apiacas n. sp., A. jamari n. sp. from Brazil; A. laventana n. sp. and A. calamuchita n. sp. from Argentina and Uruguay; A. lomalinda n. sp. from British Guiana and Colombia; A. concinnus n. sp. from Venezuela and Brazil; A. palmar n. sp. and A. loscocos n. sp. from Argentina; A. panguana n. sp. from Peru. The females of A. dubiomaculatus and A. cucutaensis and the unknown males of A. nattereri are described for the first time. New records are presented for A. crassipes; A. dubiomaculatus; A. fractus; A. nattereri; A. paranensis; A. princeps, A. pusillus, A. robustus and A. wallacei. Most of the species presently recognized were included in eleven informal groups based mainly in male palpal characters. A key for these groups plus three species, not included in any group, but known from males, is presented.
Acesso aberto (Open Access)
Revisão taxonômica e análise cladística do gênero Novamundoniscus Schultz, 1995 (Crustacea: Isopoda: Oniscidea)
(Universidade Federal do Pará, 2018-07-02) CARVALHO, Jonathas Teixeira Lisboa; ARAÚJO, Paula Beatriz de; http://lattes.cnpq.br/6693864880223173; BONALDO, Alexandre Bragio; http://lattes.cnpq.br/8721994758453503
Oniscidea was erected by Latreille in 1802. From Schmalfuss (1989), monophytic Oniscidea was accepted, based on derivated characters common to all Oniscidea. Dubioniscidae was erected by Schultz to include the genera Dubioniscus Vandel, 1963, Calycuoniscus Collinge, 1915 and Phalloniscus Budde-Lund, 1908 and the genus Novamundoniscus Schultz, 1995, erected to allocate the american species of Phalloniscus. This study aimed to make the taxonomic review of Novamundoniscus and to produce phylogenetic hipotesis of monophyletic relations of the species that compound this genus, based on morphology, to elaborate a phylogenetic relationship hipotesis among the genera that compounds Dubioniscidae, redescribe known species and describe new ones. This work is presented in a single chapter, divided into two parts, taxonomy and phylogeny of Novamundoniscus. 18 species of Dubioniscus, Novamundoniscus e Phalloniscus were analysed and a data matrix with 73 characters was generated. The final tree revealed Dubioniscidae as monophiletic, but, the validity of the genus Novamundoniscus could not be confirmed. The results of the phylogenetic analyses presented herein are considered provisory and, the taxonomic implications of the topology discussed were not adopted in the taxonomic revision of Novamundoniscus. However, the optimizations of the characters in this topology furnishes important conclusions for the understanding of the evolutive history of the taxa analysed and the characters matrix offers a solid basis for the continuation of this line of research.
Acesso aberto (Open Access)
Revisão taxonômica e análise filogenética do gênero Protopolybia Ducke, 1905 com uso de caracteres morfológicos e moleculares (Hymenoptera, Vespidae, Polistinae)
(Universidade Federal do Pará, 2018-05-27) SANTOS JUNIOR, José Nazareno dos; SILVEIRA, Orlando Tobias; http://lattes.cnpq.br/9654506257169791; https://orcid.org/0000-0002-5899-199X
Polistinae is one of the most diverse subfamilies of Vespidae with about 950 species, 25 genera and four tribes. Their representatives are recognized for presenting simple tarsal claws and lacking parategula. Ducke (1905) described two new genera for Polistinae: Protopolybia and Pseudochartergus. Bequaert (1938) reviewed Pseudochartergus recognizing only two species. Bequaert (1944a) made the first revision of Protopolybia, in which he described four new species, and considered P. minutissima and P. sedula as forms of a single species and assigned P. bella as type species of the genus. Richards (1978) performed the second revision of Protopolybia recognizing 23 species and two subspecies. Carpenter and Wenzel (1989), considering inconsistent the diagnostic characters separating Pseudochartergus and Protopolybia, proposed their synonymy, based on the synapomorphic medial posterior process on the metanotum. Carpenter (2011) proposed the synonymy of four species of the genus. Santos-Junior et al. (2015) reviewed the Protopolybia exigua species-group and using morphological characters proposed the first phylogeny for Protopolybia sensu Carpenter & Wenzel (1989). However, there is still a reasonable number of species whose identification is inaccurate. Thus, this project aims to extend the knowledge of the taxonomy and of phylogenetic relationships of the species of Protopolybia using morphological characters complemented with molecular data. For molecular analysis, fragments were isolated of the nuclear and mitochondrial genome - cytochrome subunit I (COI), 28s, 12s and 16s. Such an effort resulted on additional notes for the Protopolybia exigua species-group, with description of a new species. For the P. sedula species-group, all species are redescribed, a new identification key is presented and the genitalia of P. weyrauchi and P. sedula are described. In the P. picteti-emortualis species-group, two new species are described. In the group of species of P. chartergoides, it is proposed the synonymization of a subspecies, and the four valid species are redescribed, as well as the male genitalia of P. chartergoides, P. fuscatus and P. pallidibalteatus. As for the phylogeny of Protopolybia, the monophyly hypothesis of the group of P. chartergoides species is corroborated. Its relative position within Protopolybia is resolved, indicating a closer relationship with the group of P. sedula. On the other hand, in the present analysis the P. exigua group is paraphyletic.