Patterns in fish species composition and assemblage structure in the upper Salado River lakes, Pampa Plain, Argentina

Patterns in fish species composition and assemblage structure in the upper Salado River lakes, Pampa Plain, Argentina

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The Pampa Plain, in the central region of Argentina, is mostly drained by the Salado River. The fish fauna of this river is mostly known from field collections in lower reach lakes. Consequently, we aimed to explore the composition and structure of the fish assemblages in the upper Salado River lakes. Patterns in dominance and persistence of species and assemblage level attributes were correlated with environmental and human activity-derived [NO3:NH4] variables. Overall, 19,913 individuals of 17 species included in 5 orders and 11 families were collected. Several species are first records for the upper Salado River lakes. There was a marked proliferation of species in the family Characidae. Conversely, the remainder 10 families were only represented by one or two species. The species composition along the study lakes changed slightly but their relative contribution to the total fish collected [dominance] varied greatly. Rather few species were present in all collections suggesting an important interannual variability in assemblage stability. The gradient in water conductivity was an important factor for the persistence of particular species in the lakes. The gradients in water conductivity and NO3:NH4 ratio were associated with particular fish communities dominated by different groups of species. These results suggest that even when broad management and conservation strategies should encompass the system as a whole, lake-specific approaches must also be addressed. Overall, our results highlight that human impacts on surface waters may interact with environmental factors to influence the dynamics of fish species and the structure of their communities.

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Bibliographic Details
Main Authors: Rosso, Juan José, Quirós, Rolando
Format: Texto biblioteca
Language:eng
Subjects:DIVERSITY, DOMINANCE, ENVIRONMENTAL GRADIENTS, PERSISTENCE, REGIONAL BIOGEOGRAPHY, CHARACIDAE,
Online Access:http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46440
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spelling KOHA-OAI-AGRO:464402021-11-24T15:17:43Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46440AAGPatterns in fish species composition and assemblage structure in the upper Salado River lakes, Pampa Plain, ArgentinaRosso, Juan JoséQuirós, Rolandotextengapplication/pdfThe Pampa Plain, in the central region of Argentina, is mostly drained by the Salado River. The fish fauna of this river is mostly known from field collections in lower reach lakes. Consequently, we aimed to explore the composition and structure of the fish assemblages in the upper Salado River lakes. Patterns in dominance and persistence of species and assemblage level attributes were correlated with environmental and human activity-derived [NO3:NH4] variables. Overall, 19,913 individuals of 17 species included in 5 orders and 11 families were collected. Several species are first records for the upper Salado River lakes. There was a marked proliferation of species in the family Characidae. Conversely, the remainder 10 families were only represented by one or two species. The species composition along the study lakes changed slightly but their relative contribution to the total fish collected [dominance] varied greatly. Rather few species were present in all collections suggesting an important interannual variability in assemblage stability. The gradient in water conductivity was an important factor for the persistence of particular species in the lakes. The gradients in water conductivity and NO3:NH4 ratio were associated with particular fish communities dominated by different groups of species. These results suggest that even when broad management and conservation strategies should encompass the system as a whole, lake-specific approaches must also be addressed. Overall, our results highlight that human impacts on surface waters may interact with environmental factors to influence the dynamics of fish species and the structure of their communities.The Pampa Plain, in the central region of Argentina, is mostly drained by the Salado River. The fish fauna of this river is mostly known from field collections in lower reach lakes. Consequently, we aimed to explore the composition and structure of the fish assemblages in the upper Salado River lakes. Patterns in dominance and persistence of species and assemblage level attributes were correlated with environmental and human activity-derived [NO3:NH4] variables. Overall, 19,913 individuals of 17 species included in 5 orders and 11 families were collected. Several species are first records for the upper Salado River lakes. There was a marked proliferation of species in the family Characidae. Conversely, the remainder 10 families were only represented by one or two species. The species composition along the study lakes changed slightly but their relative contribution to the total fish collected [dominance] varied greatly. Rather few species were present in all collections suggesting an important interannual variability in assemblage stability. The gradient in water conductivity was an important factor for the persistence of particular species in the lakes. The gradients in water conductivity and NO3:NH4 ratio were associated with particular fish communities dominated by different groups of species. These results suggest that even when broad management and conservation strategies should encompass the system as a whole, lake-specific approaches must also be addressed. Overall, our results highlight that human impacts on surface waters may interact with environmental factors to influence the dynamics of fish species and the structure of their communities.DIVERSITYDOMINANCEENVIRONMENTAL GRADIENTSPERSISTENCEREGIONAL BIOGEOGRAPHYCHARACIDAENeotropical Ichthyology
institution UBA FA
collection Koha
country Argentina
countrycode AR
component Bibliográfico
access En linea
En linea
databasecode cat-ceiba
tag biblioteca
region America del Sur
libraryname Biblioteca Central FAUBA
language eng
topic DIVERSITY
DOMINANCE
ENVIRONMENTAL GRADIENTS
PERSISTENCE
REGIONAL BIOGEOGRAPHY
CHARACIDAE
DIVERSITY
DOMINANCE
ENVIRONMENTAL GRADIENTS
PERSISTENCE
REGIONAL BIOGEOGRAPHY
CHARACIDAE
spellingShingle DIVERSITY
DOMINANCE
ENVIRONMENTAL GRADIENTS
PERSISTENCE
REGIONAL BIOGEOGRAPHY
CHARACIDAE
DIVERSITY
DOMINANCE
ENVIRONMENTAL GRADIENTS
PERSISTENCE
REGIONAL BIOGEOGRAPHY
CHARACIDAE
Rosso, Juan José
Quirós, Rolando
Patterns in fish species composition and assemblage structure in the upper Salado River lakes, Pampa Plain, Argentina
description The Pampa Plain, in the central region of Argentina, is mostly drained by the Salado River. The fish fauna of this river is mostly known from field collections in lower reach lakes. Consequently, we aimed to explore the composition and structure of the fish assemblages in the upper Salado River lakes. Patterns in dominance and persistence of species and assemblage level attributes were correlated with environmental and human activity-derived [NO3:NH4] variables. Overall, 19,913 individuals of 17 species included in 5 orders and 11 families were collected. Several species are first records for the upper Salado River lakes. There was a marked proliferation of species in the family Characidae. Conversely, the remainder 10 families were only represented by one or two species. The species composition along the study lakes changed slightly but their relative contribution to the total fish collected [dominance] varied greatly. Rather few species were present in all collections suggesting an important interannual variability in assemblage stability. The gradient in water conductivity was an important factor for the persistence of particular species in the lakes. The gradients in water conductivity and NO3:NH4 ratio were associated with particular fish communities dominated by different groups of species. These results suggest that even when broad management and conservation strategies should encompass the system as a whole, lake-specific approaches must also be addressed. Overall, our results highlight that human impacts on surface waters may interact with environmental factors to influence the dynamics of fish species and the structure of their communities.
format Texto
topic_facet DIVERSITY
DOMINANCE
ENVIRONMENTAL GRADIENTS
PERSISTENCE
REGIONAL BIOGEOGRAPHY
CHARACIDAE
author Rosso, Juan José
Quirós, Rolando
author_facet Rosso, Juan José
Quirós, Rolando
author_sort Rosso, Juan José
title Patterns in fish species composition and assemblage structure in the upper Salado River lakes, Pampa Plain, Argentina
title_short Patterns in fish species composition and assemblage structure in the upper Salado River lakes, Pampa Plain, Argentina
title_full Patterns in fish species composition and assemblage structure in the upper Salado River lakes, Pampa Plain, Argentina
title_fullStr Patterns in fish species composition and assemblage structure in the upper Salado River lakes, Pampa Plain, Argentina
title_full_unstemmed Patterns in fish species composition and assemblage structure in the upper Salado River lakes, Pampa Plain, Argentina
title_sort patterns in fish species composition and assemblage structure in the upper salado river lakes, pampa plain, argentina
url http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=46440
work_keys_str_mv AT rossojuanjose patternsinfishspeciescompositionandassemblagestructureintheuppersaladoriverlakespampaplainargentina
AT quirosrolando patternsinfishspeciescompositionandassemblagestructureintheuppersaladoriverlakespampaplainargentina
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