Vertical distribution and abundance of arthropods in the soil of a Neotropical secondary forest during the rainy season

摘要: About 64,000 arthropods per m2 soil were extracted in a secondary dryland forest at Manaus, Brazil, during the rainy season early 1986. 74% of all lived top 3.5 cm, 14% below humus layer (3.5–7 cm depth), and only 12% 7–14 depth. Acari Collembola represented more than 72% total catch. Decreasing abundance was significantly correlated with lower humidity greater depths. Vertical distribution corresponded data obtained dry late 1985 from same forest. Consequently, neither nor mineral subsoils higher response to changing organic layers, as reported forests seasonal tropics.