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An arthropod community beyond the dry limit of plant life

Journal of Arid Land 2021年第6期13卷 629-638页

作者： Benjamin DAVIDSON Elli GRONER Arava Institute for Environmental Studies D.N.Eilot 88840Israel Vassar College PoughkeepsieNew York 12604United States of America Dead Sea and Arava Science Center Mitzpe Ramon 8060000Israel Ben Gurion University Eilat 88556Israel

Water availability,which enables plant growth and animal activity,regulates dryland ecosystem *** hyper-arid ecosystems,rain cannot support vascular plant ***,hyper-arid vegetation is restricted to the lower topography,where runoff ***,food resources originating from areas of dense vegetation are dispersed across the desert floor,enabling animal life in areas lacking vascular plant ***,certain regions,such as the hyper-arid upper topography,may be devoid of plant-derived food *** present study examined arthropod activity in the upper topography of a hyper-arid desert,in comparison with arthropod activity in the lower *** traps were utilized to compare arthropod activity along unvegetated ridges with activity in parallel,vegetated ***,the study revealed dense arthropod communities in the barren upper *** collected in the upper topography represented 26%of total arthropod *** addition,the overlap between arthropod identity in the ridges and wadis(i.e.,riverbeds)was low,and certain arthropods were strongly affiliated with the *** upper topographic communities included high numbers of silverfish(Zygentoma:Lepismatidae),malachite beetles(Psiloderes),and predatory mites(Acari:Anystidae),and these arthropods were present at various life *** remains unclear how arthropod communities can persist in the unvegetated upper topography of the hyper-arid study *** results raise the possibility that other food sources,independent from vascular plants,may play a significant role in the life history of hyper-arid arthropods.

关键词： hyper-arid area spatial distribution topography silverfish Tenebrionidae desert

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