Biodiv Sci ›› 1997, Vol. 05 ›› Issue (3): 168-172.  DOI: 10.17520/biods.1997027

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Study on sampling intensity of species diversity of grassland community in the Songnen Plain of China

Yang Limin, Han Mei, Li Jiandong   

  1. 1) Sector of Wild Plant Resources , Jilin Agricutural University , Changchun  130118
    2) Institute of Grassland Science , Northeast Normal University , Changchun 130024
  • Received:1996-02-05 Revised:1997-01-02 Online:1997-08-20 Published:1997-08-20

Abstract:

With Leymus chinensis-herbage and Stipa baicalensis-Filifolium sibiricum communities as deputies, the sampling intensity of species diversity of grassland communities was studied in the Songnen Plain of northeast China. The results of nested quadrat showed: the minimal area of these two communities was 1/4~1/2 m2. The results of Pielou's pooled quadrats showed: the minimal number of 1, 1/4 and 1/6 m2 of square quadrats was or so 12, 22 and 28 respectively in L. chinensis-herbage community, and 10, 18 and 25 in S. baicalensis-F. sibiricum community. The above three types of area got unanimus results in the indices of diversity at 95% of probability level. A large number of small quadrats was preferable to a small number of large quadrats.

Key words: large and middle mammals, threatened status, human disturbance