Diversity of aquatic insects and other associated macroinvertebrates in an arid wetland (Mendoza Province, Argentina)
The goal of this work was to expand the evaluation of diversity of aquatic insects and associated macroinvertebrates along the Banado Carilauquen using hand net for water column and Petersen dredge for benthos. Additionally, we explored seasonal and spatial differences and similarities of macroinver...
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Published in | Revista de la Sociedad Entomológica Argentina Vol. 72; no. 1-2; pp. 41 - 53 |
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Main Authors | , |
Format | Journal Article |
Language | Spanish English |
Published |
Sociedad Entomológica Argentina
01.06.2013
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Subjects | |
Online Access | Get full text |
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Summary: | The goal of this work was to expand the evaluation of diversity of aquatic insects and associated macroinvertebrates along the Banado Carilauquen using hand net for water column and Petersen dredge for benthos. Additionally, we explored seasonal and spatial differences and similarities of macroinvertebrate assemblages' qualitative composition. Samplings were conducted seasonally in five reaches of the Banado Carilauquen, from headwaters to outlet. A total of 47 taxa were identified; 37 of them were insects, mainly Coleoptera, Diptera and Hemiptera, in this order. Macroinvertebrate composition was more conditioned by the spatial than the seasonal variable at the ends of the gradient. Three faunal groupings were detected: headwaters, middle reach and outlet. The highest richness detected at headwaters was correspondent with the lowest conductivity levels at the Banado Carilauquen. The least diverse and most different faunal composition was recorded at outlet (highest conductivity levels). In the middle reach, richness levels were higher than expected in relation to conductivity, possibly because of the occasional presence of transient species.Original Abstract: El objetivo del trabajo fue expandir la evaluacion de la diversidad de insectos acuaticos y macroinvertebrados asociados a lo largo del Banado Carilauquen, usando red de mano para la columna de agua y draga de Petersen para el bentos. Adicionalmente, se exploraron diferencias y similitudes espacio-temporales en la composicion cualitativa de los ensambles de invertebrados. Se realizaron muestreos estacionales en cinco tramos del Banado Carilauquen, desde la cabecera hasta la desembocadura. Se identificaron 47 taxa; 37 fueron insectos, principalmente Coleoptera, Diptera y Hemiptera, en ese orden. La composicion de macroinvertebrados estuvo mejor condicionada por la variable espacial que por la temporal, en los extremos del gradiente espacial estudiado. Fueron detectados tres grupos faunfsticos: cabecera, tramo medio y desembocadura. La mayor riqueza detectada en la cabecera se correspondio con los valores mas bajos de conductividad del Banado Carilauquen. La menor diversidad y la mayor diferencia en la composicion faunfstica fueron observadas en la desembocadura (mayores niveles de conductividad). En el tramo medio, la riqueza fue mayor a la esperada segun niveles de conductividad, debido posiblemente, a la presencia de especies transitorias. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0373-5680 1851-7471 |