Species Richness and Community Composition of Ants and Beetles in Bt and non-Bt Maize Fields.

Autor:	Fernandes MG; Universidade Federal da Grande Dourados (UFGD), Programa de Pós Graduação em Entomologia e Conservação da Biodiversidade (PPGECB), Faculdade de Ciências Biológicas e Ambientais- FCBA, Dourados, MS, Brazil.; Universidade Federal da Grande Dourados (UFGD), Faculdade de Ciências Agrárias, Departamento de Agronomia, Dourados, MS, Brazil., Costa EN; Universidade Federal da Grande Dourados (UFGD), Faculdade de Ciências Agrárias, Departamento de Agronomia, Dourados, MS, Brazil., Dutra CC; Universidade Federal da Grande Dourados (UFGD), Faculdade de Ciências Agrárias, Departamento de Agronomia, Dourados, MS, Brazil., Raizer J; Universidade Federal da Grande Dourados (UFGD), Programa de Pós Graduação em Entomologia e Conservação da Biodiversidade (PPGECB), Faculdade de Ciências Biológicas e Ambientais- FCBA, Dourados, MS, Brazil.
Jazyk:	angličtina
Zdroj:	Environmental entomology [Environ Entomol] 2019 Sep 30; Vol. 48 (5), pp. 1095-1103.
DOI:	10.1093/ee/nvz086
Abstrakt:	Insect-resistant genetically modified (GM) plants have been cultivated in several countries on a large scale. These plants express the Cry toxins from the bacterium Bacillus thuringiensis Berliner (Bacillales: Bacillaceae) (Bt), which confers target-pest resistance to plants. Studies on the effects of GM plants on nontarget organisms are important to assess the technology's impact on biodiversity. The objective of this study was to determine whether there are differences in the species richness and composition of ants and ground beetles in Bt maize (four different toxins: Cry1Ab, Cry1F, and Cry1A.105/Cry2Ab2) and conventional isoline (non-Bt) fields, in the first (summer) and second (winter) cropping seasons in 13 localities of Mato Grosso do Sul State, Brazil, over a 2-yr period (2009-2011). The assessment of Coleoptera and Formicidae species was performed using pitfall traps placed in fields throughout the period of vegetative growth and maturation of plants. Data were analyzed using faunistic indices of species richness, ordination by nonmetric multidimensional scaling, and multivariate analysis of variance. No statistically significant difference was found in the species richness of ant and ground beetle communities when comparing sites of Bt with those of non-Bt maize. Overall, Bt technology did not affect the composition of ant and ground beetles; however, municipality and cropping season exerted influence on the beetle composition. Some species were only observed in the first crop, whereas others were only observed in the second crop. This research suggests that Bt maize does not affect ant and ground beetle populations differently from its isoline. (© The Author(s) 2019. 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
Externí odkaz:	Zobrazit plný text záznamu