Study on Plant Niche under Fencing Measures in the Semi-arid Grassland of North China
In order to find the plant niche pattern of grassland in the semi-arid grassland of North China,a 100 m× 100 m enclosure fixed sampling plot in the Hongsongwa Natural Reserve of Chengde was set up,and the fencing measure area and continuous grazing area were studied with the quadrat method.The niche breadths,niche overlaps and niche proportional similarities of plants were calculated in both areas using the theory of niche.The results showed that the niche breadth of Carex lanceolata Boott was the largest in both tested areas.The niche overlaps among the species with broad niche breadths were much greater,such as Carex lanceolata,Artemisia tanaceti f olia,Sanguisorba o f f icinalis,Ranunculus japonicas,Polygohum viviparum.The niche proportional similarity among these species with broad niche breadths was much greater,whereas the niche proportional similarity among the species with small niche breadths was lower.These results showed that there were linear relationships between niche breadths and niche overlaps,as well as niche breadths and niche proportional similarities.
EnclosureNiche breadthNiche overlapNiche proportional similaritySemi-arid grasslandNorth China
NETL
NSTL
万方数据
维普
