Chironomidae (Insecta, Diptera) associated with stones in a first-order Atlantic Forest stream

Stones are stable substrates in streams, usually sheltering high richness and abundance of invertebrates. To investigate the structure of the Chironomidae assemblages associated with stones in a first-order stream located in an Atlantic Forest reserve in two periods of the year, stones with diameter...

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Autores principales:	ROSA,BEATRIZ F. J. V, VASQUES,MONIQUE, ALVES,ROBERTO G
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2013
Materias:	aquatic insects lotic systems rainfall variation substrates
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000300006
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spelling	oai:scielo:S0716-078X20130003000062013-11-11Chironomidae (Insecta, Diptera) associated with stones in a first-order Atlantic Forest streamROSA,BEATRIZ F. J. VVASQUES,MONIQUEALVES,ROBERTO G aquatic insects lotic systems rainfall variation substrates Stones are stable substrates in streams, usually sheltering high richness and abundance of invertebrates. To investigate the structure of the Chironomidae assemblages associated with stones in a first-order stream located in an Atlantic Forest reserve in two periods of the year, stones with diameters from 10 cm to 25 cm were collected along a stretch of 100 m in riffle areas, during three months in the dry season and three months in the rainy season. The structure of the community was analyzed for each period through calculation of observed richness, Shannon's diversity (H'), and Pielou's evenness. The ordination of the samples from the dry and rainy seasons was evaluated by detrended correspondence analysis (DCA) and the presence of indicator species in the seasons was tested by IndVal analysis. The similarity in the faunistic composition between the periods was checked by ANOSIM. The results showed that, in general, the water velocity and rainfall were the abiotic variables that most strongly explained the abundance of larvae in the two periods studied, but the increase in these two parameters did not produce any significant effect on the richness and abundance of the fauna, suggesting stability of the stones for the Chironomidae community. There was a significant change in the faunistic composition (ANOSIM) and some samples had a stronger relationship with one of the seasons analyzed (DCA). The IndVal analysis indicated the characteristic taxa of each period, suggesting different responses to rainfall regimes. Besides this, Orthocladiinae were more abundant during the rainy season, while Chironomini was more abundant in the dry season. This study demonstrated the importance of the stones present in the stream channel as habitats for Chironomidae fauna, mainly in periods of high rainfall and water flow.info:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.86 n.3 20132013-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000300006en10.4067/S0716-078X2013000300006
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	aquatic insects lotic systems rainfall variation substrates
spellingShingle	aquatic insects lotic systems rainfall variation substrates ROSA,BEATRIZ F. J. V VASQUES,MONIQUE ALVES,ROBERTO G Chironomidae (Insecta, Diptera) associated with stones in a first-order Atlantic Forest stream
description	Stones are stable substrates in streams, usually sheltering high richness and abundance of invertebrates. To investigate the structure of the Chironomidae assemblages associated with stones in a first-order stream located in an Atlantic Forest reserve in two periods of the year, stones with diameters from 10 cm to 25 cm were collected along a stretch of 100 m in riffle areas, during three months in the dry season and three months in the rainy season. The structure of the community was analyzed for each period through calculation of observed richness, Shannon's diversity (H'), and Pielou's evenness. The ordination of the samples from the dry and rainy seasons was evaluated by detrended correspondence analysis (DCA) and the presence of indicator species in the seasons was tested by IndVal analysis. The similarity in the faunistic composition between the periods was checked by ANOSIM. The results showed that, in general, the water velocity and rainfall were the abiotic variables that most strongly explained the abundance of larvae in the two periods studied, but the increase in these two parameters did not produce any significant effect on the richness and abundance of the fauna, suggesting stability of the stones for the Chironomidae community. There was a significant change in the faunistic composition (ANOSIM) and some samples had a stronger relationship with one of the seasons analyzed (DCA). The IndVal analysis indicated the characteristic taxa of each period, suggesting different responses to rainfall regimes. Besides this, Orthocladiinae were more abundant during the rainy season, while Chironomini was more abundant in the dry season. This study demonstrated the importance of the stones present in the stream channel as habitats for Chironomidae fauna, mainly in periods of high rainfall and water flow.
author	ROSA,BEATRIZ F. J. V VASQUES,MONIQUE ALVES,ROBERTO G
author_facet	ROSA,BEATRIZ F. J. V VASQUES,MONIQUE ALVES,ROBERTO G
author_sort	ROSA,BEATRIZ F. J. V
title	Chironomidae (Insecta, Diptera) associated with stones in a first-order Atlantic Forest stream
title_short	Chironomidae (Insecta, Diptera) associated with stones in a first-order Atlantic Forest stream
title_full	Chironomidae (Insecta, Diptera) associated with stones in a first-order Atlantic Forest stream
title_fullStr	Chironomidae (Insecta, Diptera) associated with stones in a first-order Atlantic Forest stream
title_full_unstemmed	Chironomidae (Insecta, Diptera) associated with stones in a first-order Atlantic Forest stream
title_sort	chironomidae (insecta, diptera) associated with stones in a first-order atlantic forest stream
publisher	Sociedad de Biología de Chile
publishDate	2013
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2013000300006
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Chironomidae (Insecta, Diptera) associated with stones in a first-order Atlantic Forest stream

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