期刊
JOURNAL OF ARID ENVIRONMENTS
卷 73, 期 12, 页码 1095-1102出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jaridenv.2009.05.007
关键词
Abundance; Aridity; Historical factors; Pimeliinae; Species composition; Species richness
资金
- Agencia/Foncyt [BID 1728/OC-AR PICT 01-11826, 38194]
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)
- Universidad Nacional del Comahue
- BBVA Foundation, Spain
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 km(2) 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. (C) 2009 Elsevier Ltd. All rights reserved.
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