Invasive Saltcedar and Drought Impact Ant Communities and Isopods in South-Central Nebraska.

Autor:	Hoback WW; Department of Entomology and Plant Pathology, Oklahoma State University, Noble Research Center, Stillwater, OK., Jurzenski J; Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE.; Felsburg, Holt, and Ullvig, Lincoln, NE., Farnsworth-Hoback KM; Environmental Science Graduate Program, Oklahoma State University, Life Science East, Stillwater, OK., Roeder KA; Department of Biology, University of Oklahoma, Norman, OK.; Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL.
Jazyk:	angličtina
Zdroj:	Environmental entomology [Environ Entomol] 2020 Jun 13; Vol. 49 (3), pp. 607-614.
DOI:	10.1093/ee/nvaa024
Abstrakt:	The establishment and spread of non-native species often results in negative impacts on biodiversity and ecosystem function. Several species of saltcedar, Tamarix spp. L., have been recently naturalized in large portions of the United States where they have altered plant and animal communities. To test the prediction that saltcedar negatively affects invertebrates, we measured ant genera diversity and the activity density of the exotic isopod Armadillidium vulgare Latrielle (Isopoda: Oniscoidea) for 2 yr using pitfall traps located within 30 5-m2 plots with or without saltcedar at a south-central Nebraska reservoir. From 2005 to 2006, we collected 10,837 ants representing 17 genera and 4,953 A. vulgare. Per plot, the average number of ant genera was not different between saltcedar (x̅ = 3.9) and non-saltcedar areas ( x̅ = 3.9); however, saltcedar plots were compositionally different and more similar from plot to plot (i.e., they had lower beta diversity than control plots) in 2005, but not in 2006. Isopods were likewise temporally affected with higher activity density (+89%) in control plots in 2005, but higher activity density (+27%) in saltcedar plots in 2006. The observed temporal differences occurred as the drought that initially enabled the saltcedar invasion became less severe in 2006. Combined, our results suggest that invertebrate groups like ants, which are generally omnivorous, may be better equipped than more specialized taxa like detritivores to withstand habitat changes due to invasions by non-native species, especially during extreme weather events such as prolonged droughts. (© The Author(s) 2020. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
Databáze:	MEDLINE
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