Dynamics on Soil Meso-Microarthropods Community during the Decomposition of Ferns Leaf Litters in Subtropical Fforests of Jinyun Mountain
Litter decomposition plays a critical role in influencing the carbon cycling of forest ecosystems,and soil fauna are considered to be a significant factor in the acceleration litter decomposition and nutrient transformations.As yet,little information has been available on the interaction between arthropod and fern litter decomposition.The meso-microarthropods community and its fluctuation during leaf litter decomposition of 3 kinds of ferns (Woodardia japonica,Dicranopteris dichotoma,Hicriopteris chinense)were investigated with litterbag method in three contrasting vegetation types (coniferous forest,coniferous and evergreen broad-leaved mixed forest,evergreen broad-leaved forest) in Jinyun Mountain,Chongqing.The results showed that:(①) Meso-microarthropods were collected and separated from the litter bags by Tullgren methods.11 092 specimens,which belong to 20 orders,were found in the three contrasting vegetation types through 6 samplings from 30 October,2013 to 1 November,2014.Acarina and Collembola were the dominant groups,accounting for 96.55 ％ of the total.(②) The change of the soil meso-microarthropods community is not obvious in the early stage of litter decomposition,however,with the Synphyla,Araneae,and other groups gradually into the litter bags,the soil meso-microarthropods community composition changed significantly in the mid-to-late stage of decomposition.(③) With the litter decomposition,the number of soil meso-microarthropods fell rapidly at the early stage and slowly in the later.The dynamics of group of soil meso-microarthropods exterted a "W" shape,and the maximum peak of the groups quantity was observed in May and July.In addition,the biodiversity index increased significantly with the litter decomposition.④ In the process of the litter decomposition,change of the soil meso-microarthropods community groups,individual number,number of groups,and biodiversity index is consistent in three different forest types.The results showed that the decomposition of litter have an affect on soil meso-microarthropods community structure.With the litter decomposition,the community composition changed gradually,small and medium-sized soil arthropods to gradually reduce the number,different groups of soil meso-microarthropods into gradually,biodiversity gradually increase.
fernlitter decompositionsoil meso-microarthropodsdynamics community
NETL
NSTL
万方数据
维普
