Influence of some abiotic parameters on the biodiversity of macroarthropods in the "lep-liye" forest stream

A study was carried in the locality of Ngog-mapubi. The objectif to evaluate spatio- temporal dynamics macro-arthropods relation seasonal and physico-chemical quality forest stream. Benthic were sampled during short dry season (SDS) long rainy (LRS). Physico-chemical parameters such as temperature, oxygen carbon dioxide fixation, oxydability oxygen, dioxide, suspended solids, nitrate, pH measured analyzed follow standard methods. sampling net used collect at (Lep1) up-stream, (Lep 2 Lep3) med-stream 4) down-stream. 313 predominated by Hexapoda (89%) Malacostraca (11%) collected mainly identified as: Odonata (43.13%), Hemiptera (15.34%), Coleoptera (13.74%), followed Décapoda (11%), Trichoptera (8.3%), then Ephemeroptera (7.33%) Diptera (0.98%). Concerning biocenotic analysis, diversity abundance index higher LRS, Shannon showed significant difference between two seasons, while from a spatial point view, Mann-Whitney U-test revealed coarse substrate stations compared those with fine stations.