Land use, habitat integrity, and aquatic insect assemblages in Central Amazonian streams

Nessimian, Jorge Luiz; Venticinque, Eduardo Martins; Zuanon, Jansen; Marco, Paulo De; Gordo, Marcelo; Fidelis, Luana; Batista, Joana Darc; Juen, Leandro

doi:10.1007/s10750-008-9441-x

Cited by 230 publications

(138 citation statements)

References 47 publications

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“…Channel depth was measured using a fiberglass measuring tape or, when necessary, an echo sounder. Environmental integrity of each site was assessed through a habitat integrity protocol, the habitat integrity index (HII), based on Nessimian et al (2008). The HII consists of 12 questions aimed at measuring changes in environmental complexity.…”

Section: Environmental Variablesmentioning

confidence: 99%

Environmental and spatial processes determining Ephemeroptera (Insecta) structures in tropical streams

Shimano

Juen

Salles

et al. 2013

Ann. Limnol. - Int. J. Lim.

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-Community diversity is expected to reflect variations in local conditions but, recently, ecologists have started to realize that local diversity is also under pressure from global processes. As a result, the traditional view of community structure based on local interspecific interactions was replaced by the idea that community structure is a result of multiple processes acting in different spatial scales. This study is aimed at quantifying the relative importance of spatial, environmental and spatially structured processes on Ephemeroptera community in Cerrado streams in Brazil. Thirty-four rivers and streams in the Brazilian state Mato Grosso were sampled. Ephemeroptera species composition, based on abundance and presence data, was evaluated in relation to niche and neutral predictors by using a partial redundancy analysis (pRDA). Results obtained through the pRDA indicated that both environmental and spatial processes influenced Ephemeroptera abundance. On the other hand, only environmental processes showed effects on community patterns when using species presence data from preserved, altered and large streams and also when looking only at the preserved sites. When streams larger than 20 m were excluded from analysis, both environmental and spatially processes showed influence on Ephemeroptera composition. Adjusted R 2 values were higher for environmental than for spatial processes in all analyses. The relatively high influence of both environmental processes and stream width in the analyses highlights the sensitivity of mayflies assemblies to environmental variation, and emphasizes the importance of local processes, as predicted by niche theory, while neutral processes act to a lesser extent on the structure of the studied communities.

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Section: Environmental Variablesmentioning

confidence: 99%

Environmental and spatial processes determining Ephemeroptera (Insecta) structures in tropical streams

Shimano

Juen

Salles

et al. 2013

Ann. Limnol. - Int. J. Lim.

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“…Streams and rivers widths were measured with a tape-measure. We evaluated environmental integrity with Habitat Integrity Index-HII (Nessimian et al, 2008). This index is based on measurement of a series of parameters visually assessed related to land use, riparian zone conservation, streambed characteristics, and stream channel morphology related to margin and streamlet bed structure.…”

Section: Data Samplingmentioning

confidence: 99%

Concordance between Ephemeroptera and Trichoptera assemblage in streams from Cerrado – Amazonia transition

Juen

Nogueira

Shimano

et al. 2013

Ann. Limnol. - Int. J. Lim.

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-We evaluated the concordance between assemblages of Ephemeroptera and Trichoptera to verify if they respond similarly to environmental gradients in the basin of Suia´-Missu river in Mato Grosso, central Brazil. We tested the predictions that: (i) the distributional pattern of mayfly and caddisfly larvae is concordant along the spatial and (ii) environmental variation along the basin, and if (iii) taxa are concordant between themselves along the seasons and with the environmental gradients disregarding the seasons of the year. We found a concordance between species composition of mayfly and caddisfly in fall-water and rainy period, when analyzed separately by each season. The concordance between environmental variables and the two taxa analyzed separately also was concordant, but only on the fall-water season. Finally, we found congruence when both analyzed groups disregarded the temporal effect, but it was less representative than when we consider the seasons variation. Our results suggest that the hydrological cycle could be a driver of changes in species composition of mayflies and caddisflies.

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“…decrease of diversity by water pollutants) and through their biological relationship (e.g. predation and competition) (Grenouillet et al, 2008;Nessimian et al, 2008). Among the aquatic communities, zooplankton is important because it is the link between primary production (phytoplankton and bacterioplankton) to secondary consumers (e.g.…”

Section: Introductionmentioning

confidence: 99%

Factors that drive zooplankton diversity in Neo-Tropical Savannah shallow lakes

Padovesi-Fonseca

Rezende

2017

Acta Limnol. Bras.

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Abstract:Zooplankton is an important community in aquatic ecosystems due to its linkage between primary producers and secondary consumers also playing a key role in cycling of organic materials. Aim: Therefore, our objective was to evaluate the effects of physicochemical variables of the water on the diversity of zooplankton community in seven tropical shallow lakes of Brazilian savannah. Methods: Zooplankton samples were taken using a bucket and filtered 200 L by a 64 µm-mesh-plankton-net, and preserved for subsequent identification. Water temperature, dissolved oxygen, pH, electrical conductivity, turbidity, chlorophyll-a, ammonium, nitrate, nitrite, total phosphorus, and soluble reactive phosphorus were measured. Results: The turbidity (decreases the temperature, luminosity and the system productivity) and ammonium (increases the toxicity) values were the major factors responsible for structuring the zooplankton community. On the other hand, also nitrogen and phosphorus (increase the productivity) are limiting in savannah lentic systems for the zooplankton. The higher α diversity was positively associated with aquatic macrophytes (increase of niches and refuge), whereas lakes with geographic proximity increase the similarity in species composition, decreasing the β diversity. Conclusions: We conclude that the deterministic processes (niche theory), due to species have different ecological requirements, are different responses to environmental gradients and increase the diversity in heterogenic lentic systems.Keywords: α diversity; β diversity; nutrients; habitat heterogeneity; lentic systems.Resumo: O zooplâncton é uma comunidade importante nos ecossistemas aquáticos por ser o elo entre os produtores primários e os consumidores secundários, além de desempenharem um papel fundamental no ciclo de materiais orgânicos. Objetivo: Nosso objetivo foi avaliar os efeitos das variáveis físicas e químicas da água na diversidade de zooplâncton em sete lagoas rasas tropicais da savana brasileira. Métodos: As amostras de zooplâncton foram coletadas usando balde e filtrando 200 litros em rede de plâncton com abertura de 64 µm, e preservadas para posterior identificação. A temperatura da água, oxigênio dissolvido, pH, condutividade elétrica, turbidez, clorofila-a, amônio, nitrato, nitrito, fósforo total, fósforo reativo solúvel, cobertura de macrófita da lamina d'água foram obtidos. Resultados: A turbidez (ao diminui a temperatura, a luminosidade e a produtividade do sistema) e os valores de amônio (por aumenta a toxicidade) foram os principais fatores responsáveis pela estruturação do zooplâncton. Por outro lado, o nitrogênio e o fósforo (por aumentar a produtividade) são limitantes para o zooplâncton nos sistemas lênticos de savana. A maior diversidade α foi associada 2 Padovesi-Fonseca, C. and Rezende, R.S.

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Land use, habitat integrity, and aquatic insect assemblages in Central Amazonian streams

Cited by 230 publications

References 47 publications

Environmental and spatial processes determining Ephemeroptera (Insecta) structures in tropical streams

Environmental and spatial processes determining Ephemeroptera (Insecta) structures in tropical streams

Concordance between Ephemeroptera and Trichoptera assemblage in streams from Cerrado – Amazonia transition

Factors that drive zooplankton diversity in Neo-Tropical Savannah shallow lakes

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