Distribuição espacial de insetos aquáticos (Ephemeroptera, Plecoptera e Trichoptera) em córregos de cerrado do Parque Ecológico de Goiânia, estado de Goiás

Bispo, Pitágoras C.; Oliveira, Leandro Gonçalves

doi:10.4257/oeco.1998.0501.13

Cited by 36 publications

(38 citation statements)

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“…Nevertheless, in the rainy season, the value of the Shannon-Wiener index of station 3 (disturbed site) was similar to the value of station 5 (good environmental condition). In this case, the similar diversity between two stations with different environmental conditions in the rainy season could be explained by a possible redistribution of aquatic insects provoked by spates (BISPO et al 2006) that could disorder the spatial patterns of EPT distribution and diversity (BISPO & OLIVEIRA 1998, DINIZ-FILHO et al 1998. Station 4, located in Pirenópolis town, the site with the greatest anthropic action, had smaller values of richness and of diversity.…”

Section: Discussion Ept Diversitymentioning

confidence: 99%

Diversity and structure of Ephemeroptera, Plecoptera and Trichoptera (Insecta) assemblages from riffles in mountain streams of Central Brazil

Bispo

Oliveira

2007

Rev. Bras. Zool.

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Revista Brasileira de Zoologia 24 (2): 283-293, junho 2007The structure of the fauna of aquatic insects in lotic environments is directly related to geomorphology, hydrology, quality of water, quality and availability of food resources, dominant substratum, temperature and dissolved oxygen (VANNOTE et al. 1980, RICHARDS et al. 1993, ZAMORA-MUÑOZ et al. 1993, ZAMORA-MUÑOZ & ALBA TERCEDOR 1996, BISPO et al. 2006. Those characteristics vary in time and space; therefore, it is expected that those variation determine the spatial and temporal alteration of diversity and of structure of fauna in the aquatic communities.Among the aquatic insects, Ephemeroptera, Plecoptera and Trichoptera, usually known as EPT, comprise a rich assemblage of taxa in low and medium order cobble streams. These organisms are sensitive to environmental perturbations and occur, mainly, in clean and well-oxygenated waters. Due to those characteristics, these organisms are frequently considered as good indicators of water quality (ROSENBERG & RESH 1993). According to MARCHANT et al. (1995), patterns found for EPT represent the same patterns found for the macroinvertebrate fauna as a whole; for this reason, studies could be restricted to that fauna. BISPO et al. (2006) have investigated the effect of environmental factors over the distribution of EPT and have concluded that precipitation, stream order and altitude were the main factors that determine distribution and fauna abundance. The present work aimed to evaluate the effect of spatial variation, including the effects of stream size, anthropic action, and seasonality (dry and rainy seasons) over diversity and structure of Ephemeroptera, Plecoptera and Trichoptera assemblages. Caixa Postal 131, Goiás, ABSTRACT. The diversity and structure of Ephemeroptera, Plecoptera and Trichoptera (EPT) assemblages in streams of Central Brazil (Serra dos Pireneus, Pirenópolis, State of Goiás) was investigated. Abundance data of EPT were obtained in Central-West Brazilian streams in order to evaluate the effect of spatial variability, including the effect of size of the stream and anthropic action, and seasonality (dry and rainy seasons) on faunal diversity and structure. The immatures were collected with circular sieves (0.5 mm mesh) during one hour at five collection stations over 14 months. From a spatial point of view, the data showed that anthropic action determined the patterns of diversity whereas the size of streams (1 st and 3 rd -4 th orders) determined the faunistic composition. In addition, environmental seasonality was an important factor for structuring the EPT fauna. Div

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Section: Discussion Ept Diversitymentioning

confidence: 99%

Diversity and structure of Ephemeroptera, Plecoptera and Trichoptera (Insecta) assemblages from riffles in mountain streams of Central Brazil

Bispo

Oliveira

2007

Rev. Bras. Zool.

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“…According to WILLIAMS et al (2003), some fish species show feeding preferences for special benthic organisms, independent of their abundance and presence in the sediment. Seasonality and human activities affect the density and richness of BM communities (BISPO & OLIVEIRA 1998, CALLISTO et al 2005, a fact that can justify the feeding plasticity common of freshwater fishes (ABELHA et al 2001).…”

Section: Discussionmentioning

confidence: 99%

Benthic macroinvertebrate assemblages structure in two headwater streams, south-eastern Brazil

2007

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From December 2003 to September 2004, benthic macroinvertebrates (BM), fishes, water and sediment were collected quarterly at six stations in two streams of the upper São Francisco River basin, south-eastern Brazil. We evaluated the ecological conditions, habitat diversity, water quality, composition and structure of BM communities, as well as the food habits of the local fish fauna. By applying a protocol for rapid characterization of ecological conditions and habitat diversity, three of the sampled localities were classified as "pristine" while the others stations were considered "altered". A well oxygenated water with near neutral pH and low electric conductivity (< 0.01 mS/cm) and nutrient concentrations (< 0.08 mg/l total P and < 0.90 mg/l total N) was found for both streams. Sediment analysis revealed the dominance of medium, fine and very fine sand fractions in all sampled areas. The organic matter content in the sediment was higher in the lotic and well preserved area. We found 45 BM taxa, and Chironomidae (68%), Oligochaeta (10%) and Elmidae (8.5%) showed the highest abundances. From the stomach contents analysis of 13 fish species, 26 BM taxa were found, including four that were not collected in the sediment samples, being Chironomidae the dominant group (> 60%). Our results show that human activities such as forest clearing, agriculture and cattle rising have altered the habitat diversity in freshwater ecosystems in a process that affects the aquatic biota and thus the food availability to the fish fauna. The results also highlight the importance of the fish stomach contents analysis as a complementary tool in BM inventories.

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“…O H' variou no período de seca e chuvoso, com valores de 1,00 a 3,58. Os índices mais baixos foram encontrados durante os meses de chuva, devido ao aumento do fluxo nos córregos o que acarreta um grande transporte de organismos rio abaixo (OLIVEIRA et al 1997;BISPO & OLIVEIRA 1998).…”

Section: Eixo2 (15%)unclassified

Estrutura da comunidade de invertebrados bentônicos em dois cursos d'água do Rio Grande do Sul, Brasil

2003

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Distribuição espacial de insetos aquáticos (Ephemeroptera, Plecoptera e Trichoptera) em córregos de cerrado do Parque Ecológico de Goiânia, estado de Goiás

Cited by 36 publications

References 0 publications

Diversity and structure of Ephemeroptera, Plecoptera and Trichoptera (Insecta) assemblages from riffles in mountain streams of Central Brazil

Diversity and structure of Ephemeroptera, Plecoptera and Trichoptera (Insecta) assemblages from riffles in mountain streams of Central Brazil

Benthic macroinvertebrate assemblages structure in two headwater streams, south-eastern Brazil

Estrutura da comunidade de invertebrados bentônicos em dois cursos d'água do Rio Grande do Sul, Brasil

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