Abstract
Understanding scorpion responses to environmental disturbances in forest remnants is important because, as generalist predators, they exert pressure on a wide variety of arthropod populations that contribute to forest health. In this study, we investigate the drivers of scorpion Tityus pusillus Pocock, 1893 and Ananteris mauryi Lourenço, 1982 abundance in 11 Brazilian Atlantic Forest remnants. Six environmental factors (litter dry mass, remnant area, leaf litter depth, diameter at breast height of tree, canopy openness, and tree density) were assessed. Field surveys were conducted at night using ultraviolet lamps. From a sample of 1125 captured specimens, approximately 90% were T. pusillus and 7% were A. mauryi. The abundance of T. pusillus, but not A. mauryi, was positively correlated with litter dry mass. Other variables had no effect on the abundance of either species. These results suggest differences in the response of the species to environmental factors on a smaller scale. Behavior difference in foraging between T. pusillus (sit-and-wait) and A. mauryi (wandering) and microhabitat selection may also contribute to explain the influence of litter dry mass on the abundance of T. pusillus but not on the abundance of A. mauryi.
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