Abstract:

An investigation of soil animal guilds and their ecological characteristics in North Guangdong was conducted after ice-snow damage in 2008.The results showed that soil animals were divided into three guilds based on their feeding function, i.e. saprozoite, phytophage and predacity, of which the saprozoite was predominant guild in biomass compared with other two guilds. The phytophage had more numbers of individuals than the others. Olgiochaeta were the dominant group. The soil fauna showed a distinct characteristic of surface accumulation in their vertical distribution. The variety of index(DG) from high to low was as follows: conifer-broad-leaf mixed forest in middle sub-tropical，evergreen broad-leaf forest and evergreen-deciduous mixed forest. The Shannon-Wiener index(H) from high to low was distributed as follows: evergreen broad-leaf forest，evergreen-deciduous mixed forest and conifer-broad-leaf mixed forest. And the Pielou evenness index(E) was evergreen-deciduous mixed forest，evergreen broad-leaf forest and conifer-broad-leaf mixed forest. However the Simpson dominance index(C) was evergreen-deciduous mixed forest，conifer-broad-leaf mixed forest and evergreen broad-leaf forest. The soil depth significantly influence the big soil animal ecological index and functional guilds (P<0.01). Litter amount in stock was significantly corrected with biomass of soil animal community(P<0.05).

Key words: ice-snow disaster, north Guangdong, soil animal, guild