Temporal and spatial patterns of tenebrionid beetle diversity in NW Patagonia, Argentina |
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Authors: | P Sackmann GE Flores |
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Institution: | aLaboratorio Ecotono (INIBIOMA CONICET-UNC), Pasaje Gutiérrez 1125 (8400), Bariloche Río Negro, Argentina;bInstituto Argentino de Investigaciones de las Zonas Áridas (IADIZA, CCT CONICET-Mendoza), CC 507, 5500 Mendoza, Argentina |
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Abstract: | Spatial and temporal variation in abundance, richness and composition of Tenebrionidae beetle assemblages were described for north-western Patagonia. Beetles were collected using 450 pitfall traps arranged in 50 plots across an area of about 22,500 km2 representative of the Subantarctic-Patagonian transition of Argentina. The study area included three different habitats: forest, scrub, and steppe. Beetles were trapped at five, eight day sampling periods in spring-summer between November 2004 and March 2006. A total of 30 species and 938 individuals were collected. Total abundance was higher in November and January than in March, and species richness did not change among samplings. Species richness was greater in the steppe than scrub. Assemblages differed between the northern and southern transects. There was little correlation between the measured environmental variables and species composition. Historical factors might explain the observed patterns, but other environmental variables such as soil characteristics may be more informative in explaining the present distribution of tenebrionid species. |
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Keywords: | Abundance Aridity Historical factors Pimeliinae Species composition Species richness |
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