Studies on the relationship between gaps and species diversity of mid-subtropical evergreen broad-leaved forest

The species diversity of mid-subtropical evergreen broad-leaved forest in Wanmulin Natural Reserve Zone was measured and the relationship between species diversity and gap size was studied.The results show that the species diversity with gaps of forest is higher than that without gaps of forest.The arbor species diversity changes with gap size,revealing a bimodal;the species diversity peaks at the gap sizes of 200～300m².The shrub species diversity changes with the gap size too,revealing a unimodel; the species diversity peaks at the gap sizes of 400～500m².