Community Ecology
Volume/Issue:
Volume 18: Issue 1
How seasonality and anthropogenic impacts can modulate the structure of aquatic benthic invertebrate assemblages
Authors:
V.S. Uieda Unesp — Univ Estadual Paulista, C.P. 510, 18.618-970, Botucatu, SP, Brazil

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M.L.B. Iwai Unesp — Univ Estadual Paulista, C.P. 510, 18.618-970, Botucatu, SP, Brazil

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E.R. Ono Unesp — Univ Estadual Paulista, C.P. 510, 18.618-970, Botucatu, SP, Brazil

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A.L.U. Melo Unesp — Univ Estadual Paulista, C.P. 510, 18.618-970, Botucatu, SP, Brazil

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M.I.B. Alves Unesp — Univ Estadual Paulista, C.P. 510, 18.618-970, Botucatu, SP, Brazil

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Pages:
47–55
Online Publication Date:
Apr 2017
Publication Date:
01 Apr 2017
Article Category:
Research Article
DOI:
https://doi.org/10.1556/168.2017.18.1.6
Keywords:
Aquatic insects; Brazilian stream; Environmental degradation; Urbanization
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We studied a benthic invertebrate assemblage of a stream that passes through pristine, rural, suburban and urban areas of a municipality located in southeastern Brazil to investigate a possible relationship between this assemblage structure and urbanization. The environmental variables and fauna structure were analyzed in a spatial and temporal scale, sampling the four sites in a dry and wet season. We found a clear spatial pattern, with higher similarity between sites from rural and suburban area that presented intermediate environmental characteristics. The pristine site showed in both seasons the lowest values of alkalinity and fecal coliform. On the other hand, the site located in the urban area showed the lowest concentration of dissolved oxygen and higher of suspended solids, ammonia and fecal coliform. The extreme values of these three variables occurred in the wet season, probably related to the high rainfall values. The benthic invertebrate fauna structure followed the same longitudinal and seasonal pattern found for the environmental variables. The site in urban area showed the lowest richness, diversity and evenness, with a dominance of two groups resistant to adverse environmental conditions (Oligochaeta and Orthocladiinae) and absence of more sensitive groups (Coleoptera, Ephemeroptera and Trichoptera). The increase drag of the substrate and associated invertebrates can be responsible for the lower abundance and richness observed in the wet season. The environmental variables that best defined the differentiation between sites (dissolved oxygen, organic suspended solids and fecal coliform) related directly to urbanization effects, like dump effluents and removal of riparian vegetation.

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Cover Community Ecology
Community Ecology An Interdisciplinary Journal Reporting Progress in Community and Population Studies
Print ISSN:
1585-8553
Online ISSN:
1588-2756

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Community Ecology
Language English
Size A4
Year of
Foundation		 2000
Volumes
per Year		 1
Issues
per Year		 3
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1585-8553 (Print)
ISSN 1588-2756 (Online)

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