Seasonal variations in scorpion activities (Arachnida: Scorpiones) in an area of Caatinga vegetation in northeastern Brazil

Temporal variations of Collembola (Arthropoda: Hexapoda) in the semiarid Caatinga in northeastern Brazil

“…According to WOLDA (1978), areas with well-defined rainfall cycles tend to have less abundant insect populations during the dry season, as has been reported for various groups of Caatinga insects (IANNUZZI et al 2006, VASCONCELLOS et al 2010. The structural composition of the entire Collembola assemblage (and not just the individual species and their individual abundances) was found to be greatly influenced by direct and indirect effects of climatic variables.…”

“…VASCONCELLOS et al (2010) investigated the effects of seasonal change on various insect orders in the Caatinga region and observed that their abundance patterns were principally related to rainfall patterns. Temperature, on the other hand, appears to be the environmental variable that most affects insect guilds in the Cerrado (Brazilian savanna) biome (SILVA 2011).…”

“…Collembola have many natural enemies, including Coleoptera (such as carabid beetles and their larva), Diptera, and Hymenoptera (RUSEK 1988). VASCONCELLOS et al (2010) reported that the abundances of these predator groups were greatly reduced during the dry season.…”

“…Studies of the effects of temporal variations of climatic factors on the Caatinga fauna, especially in terms of its invertebrates, have been scarce in light of the wide diversity of this group of organisms (AGUIAR & MARTINS 1997, ZANELLA & MARTINS 2003, GUSMÃO & CREÃO-DUARTE 2004, IANNUZZI et al 2006, HERNÁNDEZ 2007, ARAÚJO et al 2010, VASCONCELLOS et al 2010, MEDEIROS et al 2012 The present study sought to evaluate the Collembola fauna in a semiarid area of Caatinga vegetation in northeastern Brazil and identify the climatic variables that influence species richness, individual abundances, and the structural composition of that guild. This represents one of the few studies undertaken in the Caatinga biome that has evaluated the effects of temporal variations in climatic elements on invertebrates at the species level.…”

Species composition and temporal activity of Arctiinae (Lepidoptera: Erebidae) in two cerrado vegetation types

“…Some reasons for this discrepancy may be the time required for the former type of research and the higher financial cost it involves. However, there has been an increase in funding for the development of long-term ecological research (LTER) both in Brazil and abroad, especially in the last two decades (SOUSA et al 2007, ARAÚJO et al 2010.…”