TITLE

Diversity of communities dominated by Glycyrrhiza uralensis, an endangered medicinal plant species, along a precipitation gradient in China

AUTHOR(S)
Jin-Tun Zhang; Bin Xu; Min Li
PUB. DATE
October 2011
SOURCE
Botanical Studies;2011, Vol. 52 Issue 4, p493
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Glycyrrhiza uralensis is an endangered and nationally-protected medicinal plant species in China with great market demand. It is mainly distributed in arid and semi-arid regions and its habitats have rapidly degraded over the last 40 years. Conservation of this species and its communities has become urgent. We aimed to reveal the relationships between G. uralensis and environmental variables along an east to west precipitation gradient in northern China. Floristic and environmental data from 100 5 m x 5 m quadrats were analyzed using TWINSPAN, DCA, CCA and species diversity indices. TWINSPAN recognized twelve vegetation communities, which were the communities most dominated by G. uralensis in China. DCA and CCA results showed that the vegetation patterns were significantly correlated with both soil and climatic variables. Soil N, P, K, organic matter, annual mean temperature, relative humidity, annual mean precipitation, annual mean highest temperature and annual mean lowest temperature were significant to these communities, and precipitation was the most important factor explaining the spatial patterns of vegetation. Species richness, diversity and evenness varied obviously among communities and were significantly correlated with environmental gradients. Further measures for conservation of G. uralensis and its communities are discussed.
ACCESSION #
69720875

 

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