[Effects of soil salt on the niche of main plant species in alpine meadow].
By using Levins niche breadth index and Cowell similarity index, the niche breadth and niche similarity of main plant species in Bayanbulak alpine meadow were calculated, based on 3 resources dimensions (soil moisture, organic matter, and available K) along four gradients of soil salt content. The results showed that with the increase of soil salt content, the average niche breadth of main constructive species Carex stenocarpa based on the 3 resources dimensions decreased from 0.4433 to 0.1740, while that of companion species Potentilla anserina increased from 0.1263 to 0.2215, indicating that the niche breadth of the species with low salt-endurance decreased gradually, while the species with relatively high salt-endurance had an increasing niche breadth, being able to be an important succession species. With the increase of soil salt content, the niche similarity between the species with low salt-endurance increased, while that between the species with high salt-endurance was in adverse. The niche similarity between C. stenocarpa and Kobresia capillifolia increased from 0.701 to 0.842, and that between P. anserina and Taraxacum pseudolpinum decreased from 1 to 0.708. The difference in biological characters among plant species should be the main reason for their different responses to soil salt content.
Xinjiang Institute of Ecology and Geography Research, Chinese Academy of Sciences, Urumqi 830011, China. wangxin198210@163.com
Xin
X
Wang
Yu-Kun
YK
Hu
Adilla
A
Rehemudula
Yan-Yan
YY
Liu
Kai-Hui
KH
Li
Ji-Yun
JY
Wang
D031255:Carex Plant / Q000254:growth & development; D002681:China; D003081:Cold Climate; D017753:Ecosystem; D009930:Organic Chemicals / Q000032:analysis*; D063245:Plant Development; D010944:Plants / Q000145:classification; D011188:Potassium / Q000032:analysis; D027824:Rosaceae / Q000254:growth & development; D012987:Soil / Q000032:analysis*
D009930:Organic Chemicals; D012987:Soil; D011188:Potassium