Effects of a small natural barrier on the spatial distribution of the fish assemblage in the Verde River, Upper Paraná River Basin,Brazil
Abstract Geographical barriers influence species distribution and play an important role in the segregation of fish assemblages. The present study aims to test the influence of a small natural barrier on the spatial distribution of fish species in the Verde River, Upper Paraná River Basin, Brazil, c...
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| Format: | Article |
| Language: | English |
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Instituto Internacional de Ecologia
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| Series: | Brazilian Journal of Biology |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842016000400851&lng=en&tlng=en |
| _version_ | 1819275332297949184 |
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| author | J. C. Silva É. A. Gubiani P. A. Piana R. L. Delariva |
| author_facet | J. C. Silva É. A. Gubiani P. A. Piana R. L. Delariva |
| author_sort | J. C. Silva |
| collection | DOAJ |
| description | Abstract Geographical barriers influence species distribution and play an important role in the segregation of fish assemblages. The present study aims to test the influence of a small natural barrier on the spatial distribution of fish species in the Verde River, Upper Paraná River Basin, Brazil, considering two biotopes: upstream and downstream of the Branca Waterfall. We observed the highest species richness downstream of the Branca Waterfall, which also had the highest number of exclusive species. Richness, evenness, and abundance varied significantly among biotopes. The composition and structure of the fish assemblage differed between biotopes, which were characterized by different indicator species, mainly downstream of the Branca Waterfall. Physical and chemical variables and geographical distance between sites were not responsible for the differences observed. Hence, the present study shows that small barriers can also be crucial in structuring fish fauna and play a key role in the segregation of fish assemblages. |
| first_indexed | 2024-12-23T23:22:38Z |
| format | Article |
| id | doaj.art-ddb9368b86d64ec7b9a58f225c290c7e |
| institution | Directory Open Access Journal |
| issn | 1678-4375 |
| language | English |
| last_indexed | 2024-12-23T23:22:38Z |
| publisher | Instituto Internacional de Ecologia |
| record_format | Article |
| series | Brazilian Journal of Biology |
| spelling | doaj.art-ddb9368b86d64ec7b9a58f225c290c7e2022-12-21T17:26:18ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-437576485186310.1590/1519-6984.01215S1519-69842016000400851Effects of a small natural barrier on the spatial distribution of the fish assemblage in the Verde River, Upper Paraná River Basin,BrazilJ. C. SilvaÉ. A. GubianiP. A. PianaR. L. DelarivaAbstract Geographical barriers influence species distribution and play an important role in the segregation of fish assemblages. The present study aims to test the influence of a small natural barrier on the spatial distribution of fish species in the Verde River, Upper Paraná River Basin, Brazil, considering two biotopes: upstream and downstream of the Branca Waterfall. We observed the highest species richness downstream of the Branca Waterfall, which also had the highest number of exclusive species. Richness, evenness, and abundance varied significantly among biotopes. The composition and structure of the fish assemblage differed between biotopes, which were characterized by different indicator species, mainly downstream of the Branca Waterfall. Physical and chemical variables and geographical distance between sites were not responsible for the differences observed. Hence, the present study shows that small barriers can also be crucial in structuring fish fauna and play a key role in the segregation of fish assemblages.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842016000400851&lng=en&tlng=encommunity ecologyfish faunasegregationspatial distributionwaterfalls |
| spellingShingle | J. C. Silva É. A. Gubiani P. A. Piana R. L. Delariva Effects of a small natural barrier on the spatial distribution of the fish assemblage in the Verde River, Upper Paraná River Basin,Brazil Brazilian Journal of Biology community ecology fish fauna segregation spatial distribution waterfalls |
| title | Effects of a small natural barrier on the spatial distribution of the fish assemblage in the Verde River, Upper Paraná River Basin,Brazil |
| title_full | Effects of a small natural barrier on the spatial distribution of the fish assemblage in the Verde River, Upper Paraná River Basin,Brazil |
| title_fullStr | Effects of a small natural barrier on the spatial distribution of the fish assemblage in the Verde River, Upper Paraná River Basin,Brazil |
| title_full_unstemmed | Effects of a small natural barrier on the spatial distribution of the fish assemblage in the Verde River, Upper Paraná River Basin,Brazil |
| title_short | Effects of a small natural barrier on the spatial distribution of the fish assemblage in the Verde River, Upper Paraná River Basin,Brazil |
| title_sort | effects of a small natural barrier on the spatial distribution of the fish assemblage in the verde river upper parana river basin brazil |
| topic | community ecology fish fauna segregation spatial distribution waterfalls |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842016000400851&lng=en&tlng=en |
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