Fishes and environment in northwestern Argentina: From lowland to Puna
The fish fauna and its relationships with physiography and climate were studied in northwestern Argentina from 21°30′ S to 26°30′ S and 63°30′ W to 65°50′ W, an area about 10,276 km 2. Along a southeast-northwest gradient, the Chaco forest at low altitudes gives way to the Yungas cloud forest in hig...
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todo:paper_00188158_v544_n1_p33_Menni2023-10-03T14:15:59Z Fishes and environment in northwestern Argentina: From lowland to Puna Menni, R.C. Miquelarena, A.M. Volpedo, A.V. Argentina Desert streams Distribution patterns Fish assemblages South America Stream fishes Climate change Correlation methods Rain Rivers Argentina Desert streams Distribution patterns South America Stream fishes Fisheries climate geographical distribution habitat type ichthyofauna species inventory Argentina South America Western Hemisphere World Astyanax Bryconamericus Chaco Pisces Puna Siluriformes Trichomycterus The fish fauna and its relationships with physiography and climate were studied in northwestern Argentina from 21°30′ S to 26°30′ S and 63°30′ W to 65°50′ W, an area about 10,276 km 2. Along a southeast-northwest gradient, the Chaco forest at low altitudes gives way to the Yungas cloud forest in highlands, and then, to an increasing desertic landscape, with xerophytic vegetation and scarce rainfall along the Grande River. Finally, extreme desert conditions prevail in the most northern part at the Puna plateau. Water chemistry was sampled from sites from 400 to over 3800 m a.s.l. In all 3278 fish specimens of 52 species were collected. Previous lists included 84 species. Only 19 were shared, meaning that 40 species are new for the area and/or particular localities, including 7 reports from Aguas Calientes. These results increase by one third the number of species in northwestern Argentina. The fish fauna was represented by eurytopic species of Paranensean genera as Astyanax, Bryconamericus and other characoids, mixed with locally distributed siluriforms. Under extreme climatic conditions, species of Trichomycterus predominate. Species assemblages show a combination of a large number of species typical of, sometimes endemic to or rather abundant in, the area, combined with a few species of Paranensean character. Fish assemblages were clearly defined by faunistic composition and distribution related with physiography and climate traits. A significant negative correlation is observed between both species number and abundance, and increasing altitude, and positive relationships exist with mean annual temperature and other climate traits. Diversity values (Shannon index) agree with the described pattern of increasing impoverishment of the fish fauna of northwestern Argentina, along gradients of increasing altitude and dryness and decreasing temperature. © Springer 2005. Fil:Volpedo, A.V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00188158_v544_n1_p33_Menni |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentina Desert streams Distribution patterns Fish assemblages South America Stream fishes Climate change Correlation methods Rain Rivers Argentina Desert streams Distribution patterns South America Stream fishes Fisheries climate geographical distribution habitat type ichthyofauna species inventory Argentina South America Western Hemisphere World Astyanax Bryconamericus Chaco Pisces Puna Siluriformes Trichomycterus |
| spellingShingle |
Argentina Desert streams Distribution patterns Fish assemblages South America Stream fishes Climate change Correlation methods Rain Rivers Argentina Desert streams Distribution patterns South America Stream fishes Fisheries climate geographical distribution habitat type ichthyofauna species inventory Argentina South America Western Hemisphere World Astyanax Bryconamericus Chaco Pisces Puna Siluriformes Trichomycterus Menni, R.C. Miquelarena, A.M. Volpedo, A.V. Fishes and environment in northwestern Argentina: From lowland to Puna |
| topic_facet |
Argentina Desert streams Distribution patterns Fish assemblages South America Stream fishes Climate change Correlation methods Rain Rivers Argentina Desert streams Distribution patterns South America Stream fishes Fisheries climate geographical distribution habitat type ichthyofauna species inventory Argentina South America Western Hemisphere World Astyanax Bryconamericus Chaco Pisces Puna Siluriformes Trichomycterus |
| description |
The fish fauna and its relationships with physiography and climate were studied in northwestern Argentina from 21°30′ S to 26°30′ S and 63°30′ W to 65°50′ W, an area about 10,276 km 2. Along a southeast-northwest gradient, the Chaco forest at low altitudes gives way to the Yungas cloud forest in highlands, and then, to an increasing desertic landscape, with xerophytic vegetation and scarce rainfall along the Grande River. Finally, extreme desert conditions prevail in the most northern part at the Puna plateau. Water chemistry was sampled from sites from 400 to over 3800 m a.s.l. In all 3278 fish specimens of 52 species were collected. Previous lists included 84 species. Only 19 were shared, meaning that 40 species are new for the area and/or particular localities, including 7 reports from Aguas Calientes. These results increase by one third the number of species in northwestern Argentina. The fish fauna was represented by eurytopic species of Paranensean genera as Astyanax, Bryconamericus and other characoids, mixed with locally distributed siluriforms. Under extreme climatic conditions, species of Trichomycterus predominate. Species assemblages show a combination of a large number of species typical of, sometimes endemic to or rather abundant in, the area, combined with a few species of Paranensean character. Fish assemblages were clearly defined by faunistic composition and distribution related with physiography and climate traits. A significant negative correlation is observed between both species number and abundance, and increasing altitude, and positive relationships exist with mean annual temperature and other climate traits. Diversity values (Shannon index) agree with the described pattern of increasing impoverishment of the fish fauna of northwestern Argentina, along gradients of increasing altitude and dryness and decreasing temperature. © Springer 2005. |
| format |
JOUR |
| author |
Menni, R.C. Miquelarena, A.M. Volpedo, A.V. |
| author_facet |
Menni, R.C. Miquelarena, A.M. Volpedo, A.V. |
| author_sort |
Menni, R.C. |
| title |
Fishes and environment in northwestern Argentina: From lowland to Puna |
| title_short |
Fishes and environment in northwestern Argentina: From lowland to Puna |
| title_full |
Fishes and environment in northwestern Argentina: From lowland to Puna |
| title_fullStr |
Fishes and environment in northwestern Argentina: From lowland to Puna |
| title_full_unstemmed |
Fishes and environment in northwestern Argentina: From lowland to Puna |
| title_sort |
fishes and environment in northwestern argentina: from lowland to puna |
| url |
http://hdl.handle.net/20.500.12110/paper_00188158_v544_n1_p33_Menni |
| work_keys_str_mv |
AT mennirc fishesandenvironmentinnorthwesternargentinafromlowlandtopuna AT miquelarenaam fishesandenvironmentinnorthwesternargentinafromlowlandtopuna AT volpedoav fishesandenvironmentinnorthwesternargentinafromlowlandtopuna |
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