Photo-oxidative stress is one of the key factors that can induce bleaching in reef organisms. With the decline of coral reefs and recurrent bleaching events, many studies have focused on understanding the mechanism behind this phenomenon. Two of the hypotheses that explain how the photosynthetic performance of the symbiont is affected and influences bleaching are: (1) disruption of the photosynthetic pathway by direct damage to the photosystem II (PSII), and (2) by inhibition of the Calvin-Benson cycle. In this dissertation I examine different aspects of photosynthetic performance in symbiont-bearing reef organisms and how this is influenced by symbiont loss and changes in photic stress as a result of different levels of irradiance modulated by time of the year (e.g., season) and depth; and take a closer look into primary productivity by symbionts with controlled laboratory experiments. Field experiments during 2012–2013 at Tennessee Reef, FL, assessed the photosynthetic performance of PSII in the diatom-bearing foraminifer, Amphistegina gibbosa, and the anthozoans: Palythoa cariabeorum, Siderastrea siderea, and Montastraea cavernosa. Data collected for the bleaching trends of A. gibbosa revealed that bleaching rates are higher in the summer months than in winter. Photochemical efficiencies of PSII in A. gibbosa, as measured with PAM fluorometry on the day of collection, were more variable in the shallow site (6 m) than in the deeper site (18 m). Also, photochemical efficiencies at the shallow site were lower during the summer months than during winter months. At the 18 m site, photochemical efficiencies did not exhibit a clear seasonal trend. Depth also had an effect on the measured photochemical efficiencies of the anthozoans. Photochemical efficiencies were lower and more variable in colonies at 6 m compared to colonies from 18 m. Although previous studies have reported seasonal effects on the photochemical efficiency of some coral colonies, that trend was not apparent in this study. Photoacclimation and productivity were assessed for A. gibbosa using rapid light curves (RLC) and photosynthesis vs. irradiance curves (P-E). Maximum relative electron transport rate (rETRmax) as described by RLCs was significantly different between A. gibbosa without visual signs of bleaching and those with severe bleaching. Individuals with partial bleaching had a rETRmax that was intermediate between the other two categories. The P-E curves showed a similar trend. In this case individuals that were non- or partly bleached had significantly higher photosynthesis maxima than those with severe bleaching. The onsets of photosynthesis and saturation irradiance were not significantly different among the categories of bleaching analyzed. Results from this dissertation suggest that A. gibbosa has the capability to detect and digest damaged symbionts, that the symbionts even in the deeper chambers react in a similar way to irradiance, but that in severe cases of bleaching the symbionts may not produce enough energy to sustain the requirements of the host, even in non-stressful conditions.

Submitted by Michele Mologni (mologni@unoeste.br) on 2017-08-29T18:09:13Z No. of bitstreams: 1 Daniele Perreti Bettio.pdf: 593796 bytes, checksum: 557767ed1535a67decf261ceeb060bca (MD5) / Made available in DSpace on 2017-08-29T18:09:13Z (GMT). No. of bitstreams: 1 Daniele Perreti Bettio.pdf: 593796 bytes, checksum: 557767ed1535a67decf261ceeb060bca (MD5) Previous issue date: 2017-03-30 / In the western region of São Paulo, the great problem with degraded pastures and sandy soils has been minimized with the implantation of systems that integrate crops and livestock. The objective of the present work was to evaluate biometric and biochemical changes in soybean crop and the impacts caused by soil microbiology in response to different management practices in a crop - livestock integration system in its third year of implementation. For this, soil samples were collected from an area under an integration system and different soil management, in its third experimental year, which is located at the Experimental Farm of UNOESTE, in the municipality of Presidente Bernardes - SP. Vessels with a capacity of 5 kg were filled with soil and afterwards the sowing of soybean cultivar RIBER 6813 RR was carried out. The pots with the plants were arranged in the vegetation of the University of the West - UNOESTE, in Presidente Prudente - SP, under periodic irrigation and controlled conditions of temperature and humidity for 60 days.The experimental design was completely randomized in a double factorial system (2x5) with six replications. The treatments consisted of scarification of the soil and different fertilizations: T0 = Control (fertilization only of soybean planting); T1 = Liming; T2 = Liming + Gypsum; T3 = Liming + Gypsum + NPK; and T4 = Liming + Gypsum + NPK + Micronutrients. Microbiological analyzes of the soil (carbon and microbial nitrogen, basal respiration and enzymatic activity (dehydrogenase)) were also carried out. Biochemical analyzes of the plants (MDA, total phenols and peroxidase), soya growth and nodulation were also performed. The results were submitted to the Tukey test at the 5% probability level. Soil scarification and fertilization with micronutrients provided, in the third experimental year, a reduction in microbiological indicators in the soil, after its effectiveness in the production system. The system of production without scarification with liming only, at the beginning of the implantation, increased the microbial biomass and maintained the microbial quotient in values suitable for sustainable agricultural systems. The secondary metabolism in soybean indicated that, in the third experimental year, there was an increase in the compounds related to the defense of the plants in the management with less chemical and physical interventions of the soil. / Na região do Oeste Paulista o grande problema com pastagens degradadas e solos arenosos vem sendo minimizado com implantações de sistemas que integram lavoura e pecuária. O objetivo do presente trabalho foi avaliar alterações biométricas e bioquímicas na cultura da soja e os impactos ocasionados na microbiologia do solo em resposta a diferentes manejos impostos em um sistema de Integração Lavoura – Pecuária, em seu terceiro ano de implantação. Para tanto, foram coletadas amostras de solo de uma área conduzida sob sistema de integração e diferentes manejos do solo, em seu terceiro ano experimental, a qual está localizada na Fazenda Experimental da UNOESTE, no município de Presidente Bernardes – SP. Vasos com capacidade de 5 Kg foram preenchidos com o solo e posteriormente foi realizada a semeadura da cultivar de soja RIBER 6813 RR. Os vasos com as plantas ficaram dispostos na casa de vegetação da Universidade do Oeste Paulista – UNOESTE, em Presidente Prudente – SP, sob irrigação periódica e condições controladas de temperatura e umidade, durante 60 dias. O delineamento experimental empregado foi inteiramente ao acaso em sistema fatorial duplo, (2x5) com seis repetições. Os tratamentos na área experimental consistiam em escarificação do solo e diferentes adubações: T0 = Controle (apenas adubação de plantio da soja); T1 = Calagem; T2 = Calagem + Gesso agrícola; T3 = Calagem + Gesso agrícola + NPK; e T4 = Calagem + Gesso agrícola + NPK + Micronutrientes. Foram realizadas análises microbiológicas do solo (carbono e nitrogênio microbiano, respiração basal e atividade enzimática (desidrogenase)), também foram realizadas análises bioquímicas das plantas (MDA, fenóis totais e peroxidase), avaliação de crescimento e nodulação da soja. Os resultados foram submetidos ao Teste de Tukey ao nível de 5% de probabilidade. A escarificação do solo e as adubações com micronutrientes proporcionaram, no terceiro ano experimental, após sua efetivação no sistema de produção, redução nos indicadores microbiológicos no solo. O sistema de produção sem escarificação com intervenção apenas da calagem, no início da implantação, elevou a biomassa microbiana e manteve o quociente microbiano em valores adequados para sistemas agrícolas sustentáveis. O metabolismo secundário na soja indicou que, ainda no terceiro ano experimental, houve aumento nos compostos relacionados com a defesa das plantas nos manejos com menos intervenções químicas e físicas do solo.

Os Estudos de Impacto Ambiental (EIA) foram legalmente institucionalizados no Brasil durante a década de 1980. Estes são balizados a partir do Termo de Referência (TR) que define as diretrizes que o EIAs deverão seguir, mas não determina qual grupo faunístico e metodologias devem ser adotadas, o que fica a critério dos empreendedores e consultores contratados. Visando verificar se esse procedimento resulta ou não em ausência de padronização entre os TRs e os relatórios de EIAs, bem como em outros possíveis desajustes que resultem na menor eficácia dos relatórios de EIA, foram compararados nove relatórios de empreendimentos hidrelétricos das décadas de 1980, 1990 e dos anos 2000. Para tanto, foram utilizadas informações como atendimento às exigências contidas nos TRs e metodologias utilizadas, no que diz respeito aos métodos de coleta, esforço amostral, levantamento de grupos de aves e mamíferos dependentes de hábitats específicos relacionados, solidez das listas de faunas e análise dos dados. Além disso, foi avaliada a aplicabilidade do delineamento RAPELD na avaliação de impacto de empreendimentos hidrelétricos. Os resultados indicaram que há discrepância quanto aos esforços amostrais e às metodologias utilizadas nos estudos, além da ausência de informações requeridas pelos Termos de Referência e a escassez de dados relacionados aos grupos de fauna associada aos ambientes que serão afetados e a aves e mamíferos dependentes de ambientes aluviais. O delineamento RAPELD muitas vezes não é aplicável em regiões com alterações antrogênicas, mas deve-se levar em consideração que a recomendação de sua utilização pelo órgão ambiental para um casos analisados indica uma sutil evolução recente no delineamento amostral. As análises realizadas neste trabalho podem servir como indicadores sobre o estado geral da efetividade dos EIA como ferramentas a serem utilizadas pela sociedade no que se refere às intervenções ambientais. / Environmental Impact Assessment (EIA) studies were legally institutionalised in Brazil in the 1980s, and their elaboration is based on guidelines established by Terms of Reference (TR) which define the main directives to be followed by each project\'s EIA, but often do not determine the faunal groups to include and the methods to be employed choices which are then left at the discretion of the company proposing the project and their hired consultants. In order to analyse whether this procedure does or does not result in an absence of standardisation among Terms of Reference and EIA studies, as well as in other disparities which may impair the effectiveness of EIA reports, this work compared 9 EIA reports for hydro-power projects from the 1980s, 1990s and 2000s. The reports were compared with regard to such information as compliance with the requirements set by the TRs and methodology used (including sampling methods, sampling effort, study of bird and mammal groups dependent on specific habit types, reliability of the fauna lists provided and data analysis). The appropriateness of the RAPELD sampling design for Hydro-power environmental impact assessments was also analysed. The results indicated incongruities as to the sampling effort and the methodologies employed for the studies, as well as an absence of information required according to the Terms of Reference and a paucity of data specifically dealing with fauna groups associated with environments to be directly affected by the projects and with mammals and birds dependent on alluvial environments. The RAPELD sampling design is often considered inappropriate for highly human-modified regions, but it is noted that its recommendation by environmental agencies for some of the cases analysed indicates a recent improvement in sampling designs. This work\'s findings may serve as indicators of the overall state of the effectiveness of EIA studies as tools for the society to assess the effects of interventions in the environment.

This master‘s thesis concerns with occurrence of heavy metals in the environment, mainly in the matrices of bioindicators. Special attention is given to occurrence of mercury in the environment and its quantification in bioindicators. Mercury and its compounds are today considered as one of the most significant contaminants in the environment. Some sorts of mushrooms cumulate sizable amounts of mercury in their fruiting body and therefore we can use them to consider loading of different areas. Eight areas in Vizovice and its surroundings were chosen for these purposes and during the years 2006 – 2008 harvested 50 samples from 19 sorts of mushrooms from there. The concentrations of Hg were determined in all samples by single-purpose absorption spectrometer AMA 254. Comparison of the mercury content between individual sorts of mushrooms in the same area as well as comparison of loading of areas was performed and also bioaccumulation ability of individual sorts of mushrooms was determined.

Seabirds – broadly defined as any bird species associated with the marine environment – are exposed to a wide range of environmental contaminants. Vectors of exposure to metal pollution include by external contact, inhalation, and most often ingestion of food and incidental seawater. Seabirds are often considered marine ecosystem bioindicators due to their high trophic position, relatively long lifespan, and wide geographic ranges. We examined the concentration of total mercury (THg), lead (Pb), and cadmium (Cd), in the kidney, liver, breast muscle, and feathers of seven species of juvenile and adult seabirds commonly found in South Florida: brown pelican Pelecanus occidentalis (n=16), northern gannet Morus bassanus (n=16), double-crested cormorant Phalacrocorax auritus (n=15), royal tern Thalasseus maximus (n=15), herring gull Larus argentatus (n=9), laughing gull Leucophaeus atricilla (n=15), and osprey Pandion halietus (n=15). Trace amounts of lead and cadmium were found in the subsample of birds tested, suggesting that the birds living in south Florida do not face a significant threat from those metals. Results of total mercury in 101 specimens ranged from 0 to 45.07 mg/kg (dry wt), 0.15 to 132.13 mg/kg (wet wt), 0.06 to 352.35 mg/kg (wet wt), and 0.06 to 23.43 mg/kg (wet wt) in feathers, liver, kidney, and breast muscle respectively. Individual birds found to have the highest levels of total mercury were collected from centers in Monroe County. Osprey showed the highest total mercury values overall. These findings suggest a potential link to the Everglades and runoff into the Florida Bay, thus possibly exposing birds who utilize the Florida Bay at a higher risk for mercury poisoning.

No description available.

No description available.

As características produtivas e reprodutivas de colônias de abelhas são influenciadas pelo clima e a disponibilidade de alimento na região em que são criadas ou mantidas, assim, o armazenamento de mel e pólen, a postura da rainha e a ocupação dos favos estão sujeitos às variações sazonais. O presente estudo foi desenvolvido no apiário do Departamento de Entomologia e Acarologia, no campus Luiz de Queiróz, ESALQ/USP, no município de Piracicaba, em área contendo plantas frutíferas, ornamentais e fragmento de mata nativa. O objetivo foi verificar quais e a qualidade ambiental dos recursos políniferos usados pelas abelhas A. mellifera durante as quatro estações do ano (2010-2011) 5 colmeias de Apis mellifera L., durante 7 dias consecutivos. Em cada uma das estações verificaram-se os tipos polínicos presentes nas massas de pólen (bolotas), as características físicoquímicas (lipídeos, fibras e proteína) e os metais (Zn 2+; Cu 2+; Pb 2+ ; Cd 2+). Para preparação das amostras para palinologia adotou-se o método da acetólise (ERDTMAN, 1952); para a determinação de metais foi utilizada a técnica de Voltametria de Redissolução Anódica de Pulso Diferencial (DPASV); para proteína foi utilizado o Método de Bradford, 1976 e os outros parâmetros foram baseados em métodos convencionais. A análise quantitativa foi realizada por meio da contagem sucessiva de 900 grãos por amostra e agrupados por espécies botânicas e/ou tipos polínicos. Com base nos resultados obtidos pode-se afirmar que as abelhas utilizaram as plantas de diversos tipos presentes na área utilizaram as plantas ruderais como fonte de coleta de pólen para manutenção de suas colônias. Acrescentando à sua dieta o pólen de outras plantas arbóreas, arbustivas e herbáceas, conforme o recurso tornou-se disponível na área (Eucalyptus sp, Leucaena sp., Morus nigra, Cecropia sp., e os tipos polínicos Arecaceae, Asteraceae e Myrcia). Os parâmetros físico-químicos sofreram interferência direta com os dados meteorológicos o que pode ser comprovado a partir das analise feita na matriz de correlação e analise de fatores. As analise de elementos traço Zinco; Cobre e Chumbo apresentaram valores superiores aos estabelecidos para ingestão diária em alimento, mas não existe nenhum valor como indicador no ambiente. Cádmio não ultrapassou os limites estabelecidos para consumo, mas teve alto valor encontrado no pólen. Esses valores encontrados podem estar associados ao local onde o apiário encontra-se com varias fontes poluentes como trafego intenso de veículos na principal via de acesso, estação de tratamento de água e esgoto, áreas agrícolas, industriais e residências. / The productive and reproductive characteristics of bees colonies are influenced by climate and food availability in the location they are raised or kept, and for that, the storage of honey and pollen, the queens posture and the occupation of honeycombs are linked to seasonal variation. The present study was developed in the apiary at Entomology and Acarology Department, in Luiz de Queiróz campus, ESALQ/USP, located at Piracicaba city, in a place with fructiferous, ornamental and plants and fragments of native vegetation. The aim was the verification of quality and which pollinic ambient resources were used by Apis mellifera L bees, during the four seasons of the year (2010-2011), in 7 consecutive days. At each season the pollic type where verified in the pollen masses (pollen balls) as well as the physical chemistry (lipids, fibers and proteins) and for metals (Zn 2+; Cu 2+; Pb 2+ ; Cd 2+). The method adopted for the samples preparation for the PALINOLOGIA was acetolysis (ERDTMAN, 1952); for metals determination the Volumetric REDISSOLUÇAO ANÓDICA DE PULSO DIFERENCIAL technique were used, and for protein the Bradford Method (1976). The other parameters where analised based in conventional methods. The quantitative analyses was done by successive counting of 900 pollen grains per sample, assembled by botanical species or pollinic types. Based in the results obtained, it can be affirmed that bees used several types of plants presents in the area, using the urban plants as pollen source to keep their colonies. The bees adds to their diet other pollen from arborous, shrub and herbaceous plants as they become available in the area ( Eucalyptus sp., Leucaena sp.,Morus nigra, Cecropia sp., and the pollinic types Arecaceae, Asteraceae and Myrcia). The physical chemistry parameters suffered direct influence of the meteorological data, which can be proved from the analyses made on the correlation matrix and factor analyses. The analysis for Zinc, Copper and Lead traces shown superior values of what is acceptable to ingest in daily meal, but there are no values established as environmental indicators. Cadmium had high levels found in pollen, although it did not surpass the established limits for consumption. The values founds can be associated to the place where the apiary is located, which has pollutant sources as intense car traffic in the main access via, water and sewer station treatment, agricultural and industrial areas and residences.

<p>Istraživanje je urađeno u cilju utvrđivanja obrazaca distribucije rodova <em>Merodon</em><br />Meigen, 1802 i <em>Cheilosia</em> Meigen, 1822 na području jugoistočne Evrope. Rodovi<br /><em>Cheilosia</em> i<em> Merodon </em>su najbrojniji fitofagni rodovi osolikih muva, a jugoistočna<br />Evropa je izabrana kao posebno interesantno područje analiziranja distribucije vrsta<br />zbog specifične kombinacije istorijskih, abiotičkih i biotičkih faktora koji određuju<br />distribuciju. Na području jugoistočne Evrope registrovano je ukupno 202 vrste<br />istraživanih rodova; 121 vrsta pripada rodu <em>Merodon</em>, a 81 vrsta pripada rodu<br /><em>Cheilosia</em>. Broj od preko 200 vrsta pokazuje da je jugoistočna Evropa područje od<br />izuzetnog bogatstva vrsta rodova <em>Merodon</em> i <em>Cheilosia</em>. Ovakav zaključak dopunjen je<br />postojanjem čak 79 (39%) endemskih vrsta za područje jugoistočne Evrope. Prema<br />gradijentu geografske &scaron;irine, rodovi <em>Merodon</em> i <em>Cheilosia</em> pokazuju različit distributivni<br />obrazac; uočava se da broj vrsta roda <em>Merodon</em> opada od juga ka severu, dok je<br />distributivni obrazac obrnut za rod <em>Cheilosia</em>.<br />U cilju analiziranja uticaja koje predeona struktura i promene u načinu kori&scaron;ćenja<br />zemlji&scaron;ta imaju na vrste rodova <em>Merodon </em>i <em>Cheilosia</em>, sprovedena je predeono -<br />ekolo&scaron;ka analiza, uz pomoć GIS i odgovarajućih ekolo&scaron;kih softvera. Istraživanje<br />pokazuje da postoji specifičan odnos između predeonih parametara i kompozicije vrsta<br />istraživanih rodova - sa različitom osetljivo&scaron;ću rodova <em>Merodon</em> i <em>Cheilosia</em> na<br />povezanost stani&scaron;ta i promene u načinu kori&scaron;ćenja zemlji&scaron;ta. Vrste roda <em>Cheilosia</em> su<br />pozitivno korelisane sa povezno&scaron;ću stani&scaron;ta a negativno korelisane sa svim ostalim<br />predeonim parametrima, dok najveći broj vrsta roda <em>Merodon</em> pokazuje veću otpornost<br />pri antropogenim promenama u ekosistemima. Ovakvi rezultati upućuju na<br />diferenciraniji pristup pri upravljanju područjima, fokusiran na intenzitet kori&scaron;ćenja<br />zemlji&scaron;ta (ispa&scaron;e) i povezanost stani&scaron;ta.<br />Istraživanje je obuhvatilo i evaluaciju stani&scaron;ta u okviru predela različitih karakteristika<br />(prostorno i vremenski), primenom analize SyrphTheNet bazom podataka, koja<br />uključuje vrste rodova <em>Merodon </em>i <em>Cheilosia</em> kao bioindikatore. Vrste rodova <em>Merodon</em> i<br /><em>Cheilosia</em> su se pokazale kao veoma dobri indikatori koji mogu da ukažu na trenutni<br />kvalitet istraživanog područja, kao i promene tokom dužeg vremenskog perioda.<br />Analizom korelacije utvrđeno je da postoji povezanost između promena predeonih<br />parametra u periodu od 25 godina i gubitka vrsta i kvaliteta makrostani&scaron;ta na 17<br />istraživanih lokaliteta.</p> / <p>The research has been carried out with the main aim to determine distributional patterns of two genera, <em>Merodon</em> Meigen 1802, and <em>Cheilosia</em> Meigen, 1822, in Southeast Europe region. <em>Cheilosia</em> and <em>Merodon</em> are the most numerous phytophagous hoverflies genera.</p><p>Southeast Europe has been chosen as the specific region of interest to analyze species distribution due to its specific combinations of historical, abiotic and biotic factors that determine the species distribution.</p><p>In the area of Southeast Europe, a total of 202 species of <em>Merodon</em> and <em>Cheilosia</em> have been recorded; 121 species belonging to the genus <em>Merodon</em>, and 81 species belonging to the genus <em>Cheilosia</em>, being a region exceptionally rich in species of the two genera. This conclusion has been supported by the fact that 79 (39%) endemic species has been found in the region. With regard to the gradient latitude, species of <em>Merodon </em>and <em>Cheilosia</em> genera show a different distribution pattern. More precisely, it has been shown that the number of <em>Merodon</em> species decreases from the south to the north, while the opposite pattern is true for the species of <em>Cheilosia</em> genus.</p><p>In order to analyze the responses of hoverfly species to landscape structure, land cover analyses were performed using GIS tools and related ecological software. <em>Merodon </em>and <em>Cheilosia </em>species differ in their responses to land-use change and connectivity, with the latter genus being positively correlated with connectivity and negatively correlated with all other variables. Connectivity is the primary factor affecting <em>Cheilosia</em>, while most <em>Merodon</em> species demonstrated greater resistance to changes in human-modified ecosystems. These results suggest that different management efforts, focused on land-use intensity (grazing) or connectivity, seem to be appropriate when trying to conserve these taxa.</p><p>In addition, the study examined the quality of habitats in landscapes of different characteristics (spatial and temporal), using SyrphTheNet database, in which species of the <em>Merodon</em> and <em>Cheilosia</em> genera were&nbsp;&nbsp; used as bioindicators. Species of the two genera proved to be very good indicators of the current quality of the study area, as well as changes over a longer period of time. Correlation analysis has found a significant relationship between the changes of landscape parameters for a period of 25 years and the loss of species and quality macrohabitats on 17 investigated study sites.</p>

Submitted by Mariana Dornelles Vargas (marianadv) on 2015-05-20T16:43:31Z No. of bitstreams: 1 estrutura_assembleia.pdf: 2046778 bytes, checksum: a4c5981489809046c1364fe8b728b158 (MD5) / Made available in DSpace on 2015-05-20T16:43:31Z (GMT). No. of bitstreams: 1 estrutura_assembleia.pdf: 2046778 bytes, checksum: a4c5981489809046c1364fe8b728b158 (MD5) Previous issue date: 2012 / FUNDEPE - Fundação Universitária para Desenvolvimento do Ensino e da Pesquisa / Petrobras - Petróleo Brasileiro S. A. / A economia humana, saúde e bem estar são intimamente ligados com a funcionalidade do ecossistema. Como interface entre os ecossistemas aquáticos e terrestres, os habitats ripários são um importante componente na paisagem para muitas espécies. Estudos sobre os padrões das comunidades de insetos em florestas tropicais são extremamente necessários para identificar as conseqüências da fragmentação do hábitat na biota, e auxiliar planos de conservação. Scarabaeinae representa um grupo de insetos globalmente distribuídos, contudo, tanto sua biologia como ecologia são pouco conhecidas para a maioria das espécies. Os rola-bostas são importantes organismos decompositores, envolvidos em muitas funções do ecossistema. Além disso, esses insetos são muito sensíveis à destruição do hábitat, mostrando padrões de organização distintos entre áreas degradadas quando comparados com contínuos florestais. Este estudo teve como objetivo: 1) realizar um inventário da diversidade da fauna de Scarabaeinae e de suas guildas funcionais em ambiente ripário; 2) analisar a dinâmica temporal da comunidade de rola-bostas ao longo de um ciclo anual em florestas ripárias; e 3) avaliar a influência das diferentes condições de conservação da vegetação ripária na riqueza, abundância e composição de Scarabaeinae em uma bacia hidrográfica no Sul do Brasil. O presente estudo foi realizado em florestas ripárias de arroios de segunda ordem com diferentes condições de conservação na porção superior bacia hidrográfica do Rio dos Sinos, na região Sul do Brasil. Foram alocadas armadilhas de queda com iscas de fezes humanas e carne suína em decomposição, em quatro coletas durante um ciclo anual (2010-2011) em quatro pontos em cada um de três arroios. Um total de 1289 besouros foi coletado, distribuídos em 29 espécies de 11 gêneros. As espécies classificadas como paracoprídeas e telecoprídeas predominaram na comunidade. A riqueza e a composição de besouros variaram entre os pontos com diferentes situações de conservação da vegetação ripária ao longo do período, sendo que a riqueza foi maior na primavera e no verão, bem como nos pontos mais conservados da vegetação ripária. Os rola-bostas parecem indicar grande variabilidade ambiental, e por isso, conhecer as espécies características de cada tipo de ambiente, bem como obter o entendimento das relações entre suas funções ecológicas e os serviços ecossistêmicos que executam é de vital importância para manejos futuros dos ecossistemas. Junto com outros grupos de invertebrados, estes besouros podem prover uma representação taxonômica mais ampla no desenvolvimento de práticas e políticas conservacionistas. Neste sentido, este estudo contribui com informações tanto sobre a abrangência da validade dos conhecimentos sobre Scarabaeinae para as regiões subtropicais, como também na obtenção de conhecimentos para a região Neotropical. / The human economy, health and well being are intimately connected with the functionality of the ecosystem. As the interface between terrestrial and aquatic ecosystems, riparian habitats are an important component in the landscape for many species. Studies on the patterns of insect communities in tropical rainforests are extremely necessary to identify the consequences of habitat fragmentation on the biota, and assist conservation plans. Scarabaeinae represents a group of insects globally distributed, however both its biology as well as ecology are unknown for most species. The dung beetles are important decomposer organisms, involved in many ecosystem functions. Moreover, these insects are very sensitive to habitat destruction, showing patterns of organization distinguished between degraded when compared to continuous forest. This study had as aim: 1) perform an inventory of the diversity of the Scarabaeinae fauna and their functional guilds in riparian forest ecosystem; 2) analyze the temporal dynamics of dung beetles community by along an annual cycle in riparian forests; and 3) evaluate the influence of different conditions of conservation of riparian vegetation in the richness, abundance and composition of Scarabaeinae in a hydrographic basin in Southern Brazil. This study was performed in riparian forests of second-order streams with different conditions on the upper portion of hydrographic basin of the Rio dos Sinos, in Southern Brazil. Pitfall traps baited with human feces and rotting pork were placed in four samplings during an annual cycle (2010-2011) at four places in each of three streams. A total of 1289 beetles were collected, distributed in 29 species of 11 genera. The species classified as paracopríds and telecopríds predominated in the community. The beetle richness and composition varied among sites with different situations of conservation of riparian vegetation throughout the period, and the richness was highest in spring and summer, as well as in the most conserved riparian vegetation. The dung beetles seem to indicate great environmental variability, and therefore know the species characteristics of each type of environment, as well as gain an understanding of the relationships between ecological functions and ecosystem services that run is of vital importance for future management of ecosystems. Together with other groups of invertebrates, these beetles can provide a broader taxonomic representation in the development of practices and conservation policies. Thus, this study provides information both about the scope of the validity of knowledge about dung beetles to the subtropics, as well as in obtaining knowledge for the Neotropical region.