Coenoecological Research of Euptelea pleiospermum-an Endangered Plant Species
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Key words:
- Euptelea pleiosperma,ecological association,two-way indicator species analysis,detrended correspondence analysis /
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Abstract: The Euptelea pleiosperma communities were investigated in five counties of Chongqing .Two‐way indicator species analysis (TWINSPAN) identified seven ecological associations :E. pleiospermum‐Symplocos caudate‐Iris tectorum ;E. pleiospermum+ Cunninghamia lanceolata‐Berberis soulieana‐Car‐diocrinum giganteum ;E. pleiospermum‐Cornus officinalis+ Prunus dielsiana‐Cyrtomium fortunei+ Co‐rydalis edulis ;E. pleiospermum+ Cornus controversa‐Viburnum brachybotryum‐Viola philippica+ Du‐chesnea indica;E. pleiospermum + Hydrangea strigosa ‐Ophiopogon bodinieri ;E. pleiospermum‐Broussonetia papyrifera‐Pileacadierei ; and Lindera megaphylla‐E. pleiospermum‐Iris japonica +Cyrtomium fortunei .The results of detrended correspondence analysis (DCA) of 91 species in 32 quadrats showed that E. pleiospermum was distributed relatively widely in regions at an elevation of about 1 200 m above sea level and that its distribution was reduced with decreasing elevation .No E. pleiospermum was found at an elevation of <800 m .