Explaining dissimilarities in macroinvertebrate assemblages among stream sites using environmental variables

Melo, Adriano S.

doi:10.1590/s1984-46702009000100013

Cited by 26 publications

(27 citation statements)

References 35 publications

(25 reference statements)

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“…However, only the electrical conductivity significantly correlated with abundance, as found in previous works on first order streams, indicating the importance of this parameter as the structuring of macroinvertebrates assemblages (Baptista et al, 2001;Melo, 2009).…”

Section: Discussionsupporting

confidence: 78%

“…The macroinvertebrate community may differ according to structural variables (substrate composition, food availability and flow velocity) in a small scale or can result of water limnological differences in a large scale (Kikuchi and Uieda, 1998;Melo, 2009). Moreover, abiotic variables may be divided in macro or meso spatial scale in which mesoscale can be structural and limnological with hierarchical relationship between these scales influencing organisms (Vilella et al, 2004;Kubíková et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

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Benthic macrofauna and the limnological parameters of a first-order stream in Atlantic Forest of Brazilian Northeast

et al. 2014

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Aim:The present study aimed to elucidate if the water physical and chemical parameters from a first order stream of Biological Reserve of Saltinho from south Pernambuco induces in the distribution and abundance of benthic macroinvertebrates. Methods: Both limnological parameters (pH-value, electrical conductivity, water temperature, turbidity, salinity and dissolved oxygen) and structural variables of aquatic habitat (substrate, food availability and flow velocity) influence the macroinvertebrates community structure. The creek is very small, with an approximate width of 1-3 m and a depth of 0.5 m. It was used a Surber sampler (100 µm) in three stretch of the creek, each one with two sampling units (s.u.) totaling six s.u. distant 50 m, with a sampling effort of five minutes per s.u.. The measurer multiparameter was used in order to obtain the water analysis (limnological parameters). Results: From 11 taxa of macroinvertebrates found no significant correlation (p<0.05) was presented with pH-value, water temperature and salinity, but some taxa showed with electrical conductivity (EC), turbidity (TD) and dissolved oxygen (DO). Hemiptera abundance increases with decreasing DO; Ostracoda abundance increases with increasing EC and TD and the decrease in DO; and Trichoptera abundance increases with the decrease in EC and TD and the increase in DO. The stretches exhibited similarity in relation to the richness and abundance of macroinvertebrates and limnological parameters. The macroinvertebrates distribution in the stream not showed the same pattern, grouping s.u. of different stretch, because the habitat structural variables influenced the distribution. Conclusions: Therefore, the macroinvertebrates community varies according to abiotic factors in different limnological and structural parameters. This study is the first record of a work that associates benthic fauna and abiotic parameters at the Atlantic forest of Pernambuco.Keywords: macroinvertebrates, abiotic variables, stream, Atlantic forest, benthic fauna.Resumo: Objetivo: O presente trabalho teve por objetivo elucidar se as variáveis físicas e químicas da água, de um riacho de primeira ordem da Reserva Biológica de Saltinho do sul de Pernambuco atuam na distribuição e abundância dos macroinvertebrados bentônicos. Métodos: Sabe-se que tanto as variáveis limnológicas (pH, condutividade, temperatura, turbidez, salinidade e oxigênio dissolvido) quanto as variáveis estruturais do habitat aquático (substrato, disponibilidade de alimento e velocidade do fluxo) influenciam na estrutura da comunidade de macroinvertebrados. O riacho é muito pequeno com largura aproximada de 1-3 m e profundidade de 0,5 m. Foi utilizado um amostrador tipo Surber (100 µm) em três trechos do riacho, cada um com duas unidades amostrais (u.a.) totalizando seis u.a. distantes 50 m, com um esforço amostral de cinco minutos por u.a.; as variáveis da água foram coletadas com o auxílio do medidor multiparâmetro de qualidade da água. Resultados: Dos 11 táxons encontrados nenhum exibiu cor...

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Section: Discussionsupporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Benthic macrofauna and the limnological parameters of a first-order stream in Atlantic Forest of Brazilian Northeast

et al. 2014

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“…Relationships between the structure of biological communities and environmental factors have been found in many studies in aquatic environments (e.g. ; Melo, 2009;Haig-They et al, 2010), some of which were addressed to the phytoplankton community (e.g. Calijuri et al, 2002;Borges et al, 2008).…”

Section: Introductionmentioning

confidence: 97%

The influence of environmental variables on spatial and temporal phytoplankton dissimilarity in a large shallow subtropical lake (Lake Mangueira, southern Brazil)

et al. 2014

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Aim:The uneven distribution of organisms in aquatic ecosystems is generally attributed to environmental heterogeneity in both space and time, reflecting the occurrence of appropriate environmental conditions and the availability of resources to biological communities. The aim of this study was to understand how the dissimilarity of the phytoplankton community in a large subtropical shallow lake is related to environmental dissimilarities. Methods: Biotic and environmental data were gathered at 19 sites along the 90-km length of Lake Mangueira. Sampling was carried out quarterly during 2010 and 2011, totaling 152 sampling units. The relationship between phytoplankton dissimilarity and the dissimilarity of environmental variables was assessed by the BioEnv analysis. Major results: There is a significant relationship between phytoplankton dissimilarity and environmental dissimilarity. The model that best explained the dissimilarity of phytoplankton among the sampling units included pH, turbidity and nitrate. Conclusions: The dissimilarity of phytoplankton was related to the dissimilarity, which were directly associated to the variability of conditions and resources in space and time in Lake Mangueira.

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“…Some Brazilian studies has shown how water quality variables can influence the entomofauna. Melo (2009) found distinctly different macroinvertebrate communities in nearby sites (streams) in Southeastern Brazil and concluded that these were a result of different levels of conductivity and stream size (orders). Futhermore, Roque et al (2010) analyzed the Chironomidae fauna from 61 streams and discussed the importance of both local (conductivity) and broad (riparian forest cover) scales on the aquatic community composition in streams of São Paulo State.…”

Section: Chironomidae Faunamentioning

confidence: 99%

Chironomidae (Insecta, Diptera) from Alto Paranapanema Basin, southeastern Brazil

Sonoda¹,

Malaquias²,

Vettorazzi³

2010

Chironomus

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The usual conclusions in such studies focus on the negative aspect of the conversion of riparian forest to agricultural land (Cetra and Petrere 2007;Galbraith et al. 2008). Their presence is important for the maintenance of temperature equilibrium, as continous food supply for aquatic animals, as source of organic material and stabilization of stream banks (Marinho Filho and Reis 1989;Rodrigues 1992;Aguiar et al. 2002).Because of their widespread distribution and the sensitiveness to pollution observed for some species, chironomids are used worldwide as biological indicators of environmental quality (Bacey and Spurlock 2007;Chessman et al. 2007; Smith et al. 2007). Several projects around the world demonstrate their application as bioindicators (WRC 2001; MDFRC 2007).In Brazil, several studies have been conducted in order to analyse the influence of the surrounding land-use on the aquatic fauna (Sonoda 2005;Corbi and Trivinho-Strixino 2008). The interaction of terrestrial and aquatic systems is often analysed in small watersheds in an attempt to reduce the influence of extraneous environmental factors that, consequently, make it more difficult to detect the effects of differences in catchment landuse (Siqueira and Trivinho-Strixino 2005;Roque et al. 2008). Studies conducted on large Brazilian aquatic systems are rare in the scientific literature; as the velocity of river flow and sudden changes in the water level are some of the difficulties encountered.As stated by Vinson and Hawkins (2003), streams within similar biomes support similar number of taxa. This implies that the physical and biological environment of streams are a strong selective force on insect stream communities.The rivers studied here are similar with regard to land-use and cover, terrain slope, river channel morphology and climate. Our objective was to analyze if the Chironomidae communities from AbstractWe investigated the community of Chironomidae from three rivers belonging to the same river basin in Southern Brazil. Our objective was to analyze if the Chironomidae communities from rivers of the same basin were similar and relate this to land-use and water quality variables. Samples of insects were taken using artificial substrate baskets and left 44 days in the field for colonization during the dry season in 2002. Study reaches with the relevant land-use category present for at least 500 m along both river banks above and alongside the study reach were selected and land-use, terrain slope of the river basin and chemical and physical variables of the water were analysed. Faunal data were analyzed by number of individuals, richness of genera and community indices. Statistical analyses were performed in order to investigate the relationship between abiotic variables and the Chironomidae communities. Twenty-two genera were identified; Rheotanytarsus (Thienemann & Bause) was the most abundant in all assemblages. Some genera showed preferences in their distribution, and were observed in only one of the rivers. Land-use and slope of the terrain ...

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Explaining dissimilarities in macroinvertebrate assemblages among stream sites using environmental variables

Cited by 26 publications

References 35 publications

Benthic macrofauna and the limnological parameters of a first-order stream in Atlantic Forest of Brazilian Northeast

Benthic macrofauna and the limnological parameters of a first-order stream in Atlantic Forest of Brazilian Northeast

The influence of environmental variables on spatial and temporal phytoplankton dissimilarity in a large shallow subtropical lake (Lake Mangueira, southern Brazil)

Chironomidae (Insecta, Diptera) from Alto Paranapanema Basin, southeastern Brazil

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