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Diversidad de macroinvertebrados bentónicos en ecorregiones de altura de Jujuy (norte argentino)

Authors: Vargas Rodriguez Nelly; Pereyra Laura; Torrejon Silvia Elena;

Diversidad de macroinvertebrados bentónicos en ecorregiones de altura de Jujuy (norte argentino)

Abstract

Los estudios de diversidad acuática plantean una declinación del número de taxones en relación al incremento altitudinal, debido a la baja presión de oxígeno o a cierta homogeneidad del hábitat, entre otros. Las investigaciones se realizaron generalmente a una escala local o subestimando la gran heterogeneidad ambiental que caracteriza a estas zonas a pesar de su aspecto desértico e inhóspito. El objetivo del trabajo fue determinar el patrón espacial de la diversidad de macroinvertebrados acuáticos en la ecorregión de Puna y altos Andes de la provincia de Jujuy, analizando los componentes alfa y beta de la diversidad de ensambles de macroinvertebrados acuáticos entre distintas cuencas (6). Se realizó un diseño a escala regional, en 19 sitios (3500 – 4600 msnm). Se realizó un análisis de cluster para clasificar los sitios en grupos con similitudes ambientales (temperatura media anual, precipitación media anual y altitud fueron significativos). Los sitios se agruparon en 3 áreas: a) Olaroz – Tuzgle, b) Río Grande – Yavi – Miraflores y c) Vilama, esta clasificación explica el 99 % de la variabilidad. La riqueza específica (S) y los valores de diversidad verdadera (DV), señalan al grupo a) como el de valores significativamente menores (4000 msnm), a diferencia de los grupos b) y c) con modelos que se ajustan significativamente mostrando un incremento de S y DV en relación al incremento de la altitud. Comparando la composición de especies entre los grupos, se encontraron diferencias en la diversidad beta dadas principalmente por un recambio de especies.

Keywords

Diversidad, Macroinvertebrados bentonicos, Ecorregiones

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
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