Liang Chang

Euedaphic and hemiedaphic Collembola suffer larger damages than epedaphic species to nitrogen input

Wetlands are commonly limited in available nitrogen. But marshes in the Sanjiang Plain, Northeastern China suffer large amounts of exogenous nitrogen from agriculture fertilization after wetland reclamation. This paper focuses on the ecological effects of a short-term increase of nitrogen input on collembolan communities. Our results show a significant decrease in collembolan abundance and Shannon diversity index, and the abundance of euedaphic and hemiedaphic collembolans decreased faster than epedaphic collembolans. These results indicate that euedaphic or hemiedaphic fauna suffer more biodiversity loss caused by nitrogen deposition than epedaphic fauna and call for more researches on trait-based approaches under environmental stress in the future.

Two new species of Allonychiurus Yoshii, 1995 (Collembola, Onychiuridae) from eastern China, with a key to world species of the genus.

Two new species, Allonychiurus zhejiangensis sp. nov. and Allonychiurus pseudokimi sp. nov., have been reported from eastern China. A. zhejiangensis sp. nov. is particular in the genus as having three pso on ventral side of the head. A. pseudokimi sp. nov. is similar to A. kimi, but they can be distinguished by the number of pso on ventral side of the head, the number of chaetae along axial line on Abd. I-II, the number of chaetae on ventral tube and the presence of basal lamella on unguiculus. A key to the known species of the genus all over the world is given accordingly.