Minimum sampling area and species diversity of evergreen broadleaved forest community in Mount Tianmu

Key words: 
• forest ecology /
• evergreen broadleaved forest community /
• species diversity /
• species-area curve /

Abstract: In order to study plant species diversity based on one-off investigation, one typical plot with size of 100 m 100 m was surveyed in National Nature Reserve of Mount Tianmu in Zhejiang Province .Total station was used to measure tree coordinates .Populations of evergreen broadleaved forest community was divided into five size classes :seedling , sapling , small tree , middle tree and big tree class by tree's boot diameter and diameter at breast height .Species diversity analysis adopts species richness and Shannon-Wiener Index .Minimum sampling area was determined by species-area curve .The result shows that there are 127 tree species , 76 arbor tree species and 51 shrub tree species , in sampling plot .The maximum species richness is in small tree class which contains 99 species or 78 percent of total tree species number .Species diversity index Hand dominant species number tends toward increasing tendency from seedling class to big tree class except sapling class .In order to get 80 percent of total tree species number, minimum sampling area is 4 048 m2 , corresponds to a square plot with 64 m length of one side , and can be a reference of species diversity one-off investigation plot .[ Ch , 2 fig .2 tab .26 ref .]