O conceito de continuidade de rios é válido para rios de mata atlântica no sudeste do Brasil?

Baptista, D. F.; Buss, Daniel Forsin; Dorvillé, Luís Fernando Marques; Messimian, J. L.

doi:10.4257/oeco.1998.0501.15

Cited by 16 publications

(15 citation statements)

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“…5) Temporal change in community dominant taxon. Although there was not great temporal changes in structure and function of the aquatic insect communities (Baptista et al, 1998b), there was some changes in the dominant groups for Ephemeroptera and Trichoptera. As EPT (Ephemeroptera + Plecoptera + Trichoptera) is a widely used index for measuring water quality by means of aquatic biota, it is important to note this change in dominant taxon, that naturally occur.…”

Section: Substrate and Stream Order Abundance And Richness Patternsmentioning

confidence: 90%

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Diversity and habitat preference of aquatic insects along the longitudinal gradient of the Macaé River basin, Rio de Janeiro, Brazil

et al. 2001

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Diversity and habitat preference of macroinvertebrates were studied in Macaé River basin, Rio de Janeiro State, Brazil, along its longitudinal gradient. We selected stream reaches corresponding to 1 st , 2 nd , 4 th , 5 th and 6 th orders. A Surber sampler was used to collect four macroinvertebrates samples of each substrate (sand, litter in pool areas, stones, and litter in riffle areas) during the three sampling periods, defined based on the rain regime: April (end of the rainy season), July (dry season), and October (beginning of the rainy season). We identified 46,431 specimens corresponding to 117 taxa. Analysis of diversity numbers (both for family or genus level) indicated that all insect taxonomic orders had higher numbers on 2 nd order stream reach, except for Ephemeroptera, on 4 th order. However when considering morphspecies taxonomic level, the higher diversity number occurred on 4 th order stream. The highest richness and diversity numbers were found at the dry season. Considering habitat preference, both litter in pool areas and litter in riffle areas had the highest faunal richness.Key words: diversity, aquatic insects, longitudinal gradient, tropical river, Brazil. RESUMO

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Section: Substrate and Stream Order Abundance And Richness Patternsmentioning

confidence: 90%

“…2) Stream order -there are natural differences in composition and structure between reaches of different orders as predicted by Vannote et al (1980) and tested in South-eastern Brazil recently by Baptista et al (1998b). 3) Habitat variation -the fauna had distinct composition on each substrate.…”

Section: Substrate and Stream Order Abundance And Richness Patternsmentioning

confidence: 91%

Diversity and habitat preference of aquatic insects along the longitudinal gradient of the Macaé River basin, Rio de Janeiro, Brazil

et al. 2001

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“…According to Ward (1992), the altitudinal streams represent valuable environmental resources, as primary points as water sources and formation of watersheds. In Brazil, river studies are still scarce, standing out the evaluation of the River Continuum Concept of Vannote et al (1980) in the State of Rio de Janeiro by Baptista et al (1998); evaluation of the riverine diversity grassland streams by Diniz-Filho et al (1998), Oliveira & Froehlich (1996;1997a), Oliveira et al (1997), Bispo & Oliveira (1998), Froehlich & Oliveira (1997) and, in the State of São Paulo, Oliveira & Froehlich (1997b). Furthermore, at Serra do Cipó, a preliminary evaluation of aquatic biodiversity were made by Maia- Barbosa et al (in press), Barbosa et al (in press), Galdean et al (in press), Galdean et al (2000).…”

Section: Introductionmentioning

confidence: 99%

Habitat diversity and benthic functional trophic groups at Serra do Cipó, Southeast Brazil

2001

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The assessment of the diversity of habitats and the characterisation of the functional trophic groups of benthic macroinvertebrate communities of some rivers of Serra do Cipó (MG) were the main objectives of this study. The available trophic resources and the types of substrata were characterised along with the structure and composition of their using functional trophic groups. Serra do Cipó is a watershed divisor of the São Francisco and Doce River basins, including a series of streams and rivers, of good water quality and well preserved ecological characteristics. Samples were collected in Cipó, Peixe and Preto do Itambé rivers, besides the Indaiá and Capão da Mata streams at 26 sampling stations, during the rainy (February) and dry (October) seasons of 1998, using "Kicking nets" of 0.125 mm mesh size. The group of collectors (Baetidae, Leptophlebiidae and Leptohyphidae) was the most abundant, followed by collector-predators (Hydrophilidae, Ceratopogonidae, Chironomidae-Tanypodinae), and detritivorous-herbivores (Oligochaeta). The riparian vegetation, together with the aquatic macrophytes, are the substrata containing the highest richness of functional trophic groups and the higher habitat diversity. The results suggest that the use of functional trophic groups, together with habitat evaluation, are efficient tools in the evaluation of the diversity of benthic macroinvertebrates, particularly in altitudinal lotic ecosystems.Key words: benthic macroinvertebrates, functional trophic groups, bioindicators, river ecology, habitat diversity. RESUMO Diversidade de habitats e grupos tróficos funcionais na Serra do Cipó, sudeste do BrasilEste trabalho teve por objetivo avaliar a diversidade de habitats e caracterizar os grupos tróficos funcionais das comunidades de macroinvertebrados bentônicos em alguns rios na Serra do Cipó, MG. Foram caracterizados os recursos tróficos disponíveis e os tipos de substrato nos habitats amostrados, a composição de grupos tróficos funcionais que os utilizam e a estrutura da comunidade de macroinvertebrados bentônicos. A Serra do Cipó constitui-se em um divisor de águas das bacias do Rio São Francisco e do Rio Doce e engloba uma série de córregos e rios, com características ecológicas ainda bem preservadas e águas de boa qualidade. Foram amostrados os rios Cipó, Peixe e Preto do Itambé, além dos córregos Indaiá e Capão da Mata ao longo de 26 estações amostrais. As amostras foram coletadas nos períodos de chuva (fevereiro) e seca (outubro) de 1998, utilizando-se "Kicking nets" com malha de 0,125 mm. Os resultados evidenciaram que o grupo dos coletores (Baetidae, Leptophlebiidae e Leptohyphidae) foi o mais abundante, seguido pelos coletores-predadores (Hydrophilidae, Ceratopogonidae, Chironomidae-Tanypodinae) e detritívoros-herbívoros (Oligochaeta). A avaliação da diversidade de habitats permitiu caracterizar a vegetação ripária, juntamente com as Rev. Brasil. Biol., 61(2)

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“…Beisel et al (1998) found that nature of substrate also appeared to exert a strong influence on community structure. Some studies in Brazil have also shown that the distribution of macroinvertebrates was influenced primarily by substrate type rather than environmental integrity, sampling period or river order (Buss et al, 2004;Baptista et al, 1998a;Costa and Melo, 2008). The substrates are colonized by individuals that show similar morphological and functional characteristics that allow than to live in these habitats.…”

Section: Functional Feeding Groupsmentioning

confidence: 99%

Spatial distribution and functional feeding groups of aquatic insect communities in Serra da Bocaina streams, southeastern Brazil

Oliveira

Nessimian

2010

Acta

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Aim: The aim of this paper was to study the spatial distribution and functional feeding structure of aquatic insect communities of 18 streams at different altitudes in Mambucaba River Basin, Serra da Bocaina, Southeastern Brazil; Methods: Samples were collected in two consecutive dry periods (August of 2003 and being sampled four substrate types in each stream: litter from riffles, litter from pools, rocks and gravel; Results: We identified 75,581 aquatic insect individuals belonging to 201 taxa. Most of the fauna was found in litter substrates (64%), and riffle litter substrate had the majority of the specimens (32,572 individuals). Gravel was the substrate with highest values of richness (29.84 taxa expected for 187 individuals; rarefaction method) and Shannon's diversity (H' = 2.370). Rock substrate showed the lowest richness (20.24 taxa). Distribution of taxa across substrates shows that only 28 taxa are restricted to a single substrate, while 78 taxa occurred in all substrates. The indicator analysis showed that 20 taxa were characteristic of pool litter, 25 of riffle litter, 22 of gravel and only nine to rock. In relation to organic and inorganic substrates, 29 taxa were characteristic of litter, and 17 of inorganic substrates. Cluster analysis based on Bray-Curtis dissimilarity index and UPGMA linkage method showed that aquatic insects were distributed according to substrate and food resource. In all substrates, the main functional feeding group was collector-gatherer (40.64%), and the least representative was shredder (6.67%). ANOVA and Tukey HSD tests showed that collector-gatherers and shredders were predominant in pool substrates, collector-filters in riffle substrate and scrapers in hard substrates; Conclusion: Ours results show that independently of stream or altitude, substrate of the same type have similar faunal assemblages. The abundance and relative proportion of the functional feeding group showed variation across habitats.Keywords: distribution, habitats, substrates, benthic macroinvertebrates.Resumo: Objetivo: O objetivo deste artigo foi estudar a distribuição espacial e a categorização funcional trófica da comunidade de insetos aquáticos de 18 riachos em diferentes altitudes na Bacia do Rio Mambucaba, Serra da Bocaina, Sudeste do Brasil; Métodos: As amostras foram coletadas em dois períodos secos consecutivos (agosto de 2003 e 2004), sendo coletados em quatro tipos de substratos: folhiço em correnteza, folhiço de fundo, pedras e cascalho; Resultados: Foram identificados 75.581 indivíduos de insetos aquáticos pertencentes a 201 táxons. Os substratos com folhiço concentraram a maior parte da fauna (64%), sendo o folhiço em correnteza o substrato com maior abundância de indivíduos (32.572). O cascalho apresentou os maiores valores de riqueza (29,84 táxons esperado em 187 indivíduos; método da rarefação) e diversidade de Shannon (H' = 2,370). A menor riqueza (20,24 táxons) foi observada no substrato pedra. A distribuição dos táxons entre os substratos mostrou 28 táxons restritos a um...

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O conceito de continuidade de rios é válido para rios de mata atlântica no sudeste do Brasil?

Cited by 16 publications

References 0 publications

Diversity and habitat preference of aquatic insects along the longitudinal gradient of the Macaé River basin, Rio de Janeiro, Brazil

Diversity and habitat preference of aquatic insects along the longitudinal gradient of the Macaé River basin, Rio de Janeiro, Brazil

Habitat diversity and benthic functional trophic groups at Serra do Cipó, Southeast Brazil

Spatial distribution and functional feeding groups of aquatic insect communities in Serra da Bocaina streams, southeastern Brazil

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