Articles
Characteristics of native Cymbidium tortisepalum populations in Yunnan province of China
Article number
1185_29
Pages
221 – 230
Language
English
Abstract
Cymbidium tortisepalum is an endemic and endangered orchid species in southwestern China.
Twenty-eight native populations of C. tortisepalum in northwest Yunnan province were studied from August to October in 2013 and 2014. The morphology, habitat, ecological factors, and rhizosphere soil nutrients of Wild C. tortisepalum and the community structure and characteristics of native populations of C. tortisepalum were investigated.
There is a wide range of ecological adaptability for native C. tortisepalum in leaf length, leaf width, plant height, root length, and scape length.
The coefficient of variation is over 15%. Moreover, a small individual number in a few populations of C. tortisepalum were degraded significantly.
There are 12 kinds of trees, 37 kinds of shrubs, and 40 kinds of herbs in populations of native C. tortisepalum in three parallel river regions (Nujiang river, Jinsha river, and Lancang river) of northwestern Yunnan province.
The community structure of wild populations was relatively stable.
The tree layer was composed of Pinus yunnanensis, Cyclobalanopsis glauca, Quercus variabilis, and a small number of fir species.
The shrub layer was composed of Pistacia weinmannifolia, Rhododendron delavayi, Lindera umbellata, Quercus spinosa, Ophiopogon japonicus, Cassia obtusifolia, Ficus tikoua, and Imperata cylindrica. The variation coefficient of the leaf length, leaf width, plant height, root length, and flower scape length was more than 15%. Flower scape length variation coefficient reached the maximum at 27.77%. The leaf length, leaf width, plant height, root length, and flower scape length were the most susceptible characteristics to environmental influence.
Twenty-eight native populations of C. tortisepalum in northwest Yunnan province were studied from August to October in 2013 and 2014. The morphology, habitat, ecological factors, and rhizosphere soil nutrients of Wild C. tortisepalum and the community structure and characteristics of native populations of C. tortisepalum were investigated.
There is a wide range of ecological adaptability for native C. tortisepalum in leaf length, leaf width, plant height, root length, and scape length.
The coefficient of variation is over 15%. Moreover, a small individual number in a few populations of C. tortisepalum were degraded significantly.
There are 12 kinds of trees, 37 kinds of shrubs, and 40 kinds of herbs in populations of native C. tortisepalum in three parallel river regions (Nujiang river, Jinsha river, and Lancang river) of northwestern Yunnan province.
The community structure of wild populations was relatively stable.
The tree layer was composed of Pinus yunnanensis, Cyclobalanopsis glauca, Quercus variabilis, and a small number of fir species.
The shrub layer was composed of Pistacia weinmannifolia, Rhododendron delavayi, Lindera umbellata, Quercus spinosa, Ophiopogon japonicus, Cassia obtusifolia, Ficus tikoua, and Imperata cylindrica. The variation coefficient of the leaf length, leaf width, plant height, root length, and flower scape length was more than 15%. Flower scape length variation coefficient reached the maximum at 27.77%. The leaf length, leaf width, plant height, root length, and flower scape length were the most susceptible characteristics to environmental influence.
Authors
Y. Bi, M. Suo, M. Tang, G. Ye, H. Wang
Keywords
wild Cymbidium tortisepalum, morphological characteristics, community structure, ecological factors
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