Patterns of fish species richness in rivers of the central region of Argentina
We analyzed the variation of fish species richness and trophic structure along an upstream-downstream gradient and identified the factors associated with the pattern observed. The fish community composition varied along a headwater-downstream gradient. Species richness and trophic structure decrease...
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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 |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842002000500004&lng=en&tlng=en |
| _version_ | 1818348972849233920 |
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| author | M. A. BISTONI A. C. HUED |
| author_facet | M. A. BISTONI A. C. HUED |
| author_sort | M. A. BISTONI |
| collection | DOAJ |
| description | We analyzed the variation of fish species richness and trophic structure along an upstream-downstream gradient and identified the factors associated with the pattern observed. The fish community composition varied along a headwater-downstream gradient. Species richness and trophic structure decreased significantly with increasing altitude and increased with stream order and distance from source. Headwater communities showed a simple structure. Oncorhynchus mykiss was the only fish captured or noticeably dominant at high altitudes. Thus, headwater can be classified as "trout zones". From these zones to downstream areas fish communities changed because of the addition of other fish species. This phenomenon probably occurs because of an increase in habitat diversity. |
| first_indexed | 2024-12-13T17:58:33Z |
| format | Article |
| id | doaj.art-90490d37848b4698bbce35b71acbd5da |
| institution | Directory Open Access Journal |
| issn | 1678-4375 |
| language | English |
| last_indexed | 2024-12-13T17:58:33Z |
| publisher | Instituto Internacional de Ecologia |
| record_format | Article |
| series | Brazilian Journal of Biology |
| spelling | doaj.art-90490d37848b4698bbce35b71acbd5da2022-12-21T23:36:17ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-4375624b75376410.1590/S1519-69842002000500004S1519-69842002000500004Patterns of fish species richness in rivers of the central region of ArgentinaM. A. BISTONI0A. C. HUED1Universidad Nacional de CórdobaUniversidad Nacional de CórdobaWe analyzed the variation of fish species richness and trophic structure along an upstream-downstream gradient and identified the factors associated with the pattern observed. The fish community composition varied along a headwater-downstream gradient. Species richness and trophic structure decreased significantly with increasing altitude and increased with stream order and distance from source. Headwater communities showed a simple structure. Oncorhynchus mykiss was the only fish captured or noticeably dominant at high altitudes. Thus, headwater can be classified as "trout zones". From these zones to downstream areas fish communities changed because of the addition of other fish species. This phenomenon probably occurs because of an increase in habitat diversity.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842002000500004&lng=en&tlng=enfish species richnessriversaltitudedistance from sourceorder |
| spellingShingle | M. A. BISTONI A. C. HUED Patterns of fish species richness in rivers of the central region of Argentina Brazilian Journal of Biology fish species richness rivers altitude distance from source order |
| title | Patterns of fish species richness in rivers of the central region of Argentina |
| title_full | Patterns of fish species richness in rivers of the central region of Argentina |
| title_fullStr | Patterns of fish species richness in rivers of the central region of Argentina |
| title_full_unstemmed | Patterns of fish species richness in rivers of the central region of Argentina |
| title_short | Patterns of fish species richness in rivers of the central region of Argentina |
| title_sort | patterns of fish species richness in rivers of the central region of argentina |
| topic | fish species richness rivers altitude distance from source order |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842002000500004&lng=en&tlng=en |
| work_keys_str_mv | AT mabistoni patternsoffishspeciesrichnessinriversofthecentralregionofargentina AT achued patternsoffishspeciesrichnessinriversofthecentralregionofargentina |