title: Spatio-temporal microhabitat use by two co-occurring species of scorpions in Atlantic rainforest in Brazil.
abstract: With the increasing devastation of the tropical rain forest, there is a critical need to understand how animal forest communities are structured and how habitat degradation will affect these communities. We conducted a field survey to investigate the microhabitat preferences of two co-occurring species of scorpions (Tityus pusillus and Ananteris mauryi) in a fragment of Atlantic rainforest, as well as their abundance and their ecological niche, during both the dry and rainy seasons. Behavioural aspects related to the use of the environment and the proportions of juveniles and adults are also described. The occurrence of intra- and interspecific coexistence was assessed by active search. In addition, pitfall catches were used to assess the structure of the population in the dry and rainy seasons. The differential patterns of spatial distribution in the litter layers provided evidence of partial niche partitioning between the two coexisting scorpion species depending on age and climatic conditions. Abundance, foraging behaviour and age structure (juveniles and adults) were seasonally influenced. We conclude that the diverse and subtle behaviours involved in interaction and habitat use may facilitate species coexistence. Resource partitioning and refuge sharing on a temporal and/or spatial scale, as well as predation pressure, may drive the dynamics and spatial distribution of scorpion species in the rain forest environment.
authors.affiliation: Departamento de Zoologia, Centro de Ciências Biológicas, Universidade Federal de Pernambuco, Rua Prof. Moraes Rego S/N, Cidade Universitária, 50670-420 Recife, Pernambuco, Brazil. sargametal@hotmail.com
authors.forename: André F A
authors.initials: AF
authors.lastname: Lira
authors.forename: Adriano M
authors.initials: AM
authors.lastname: Souza
authors.forename: Arthur A C
authors.initials: AA
authors.lastname: Silva Filho
authors.forename: Cleide M R
authors.initials: CM
authors.lastname: Albuquerque
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D001938:Brazil; D017753:Ecosystem; D011157:Population Dynamics; D012605:Scorpions / Q000502:physiology*; D012621:Seasons; D013045:Species Specificity