[Relationship between species distribution and habitat effective temperature in subalpine meadow of Mt. Xiaowutai].
By the methods of sugar-inversion, plant community field survey and laboratory analysis, this paper measured the effective temperature of habitats, relative coverage of species, and aboveground biomass in subalpine meadow of Mt.Xiaowutai, and analyzed the relationship between species distribution and habitat effective temperature in landscape scale. The results showed that among 97 vascular plant species registered, the distribution patterns of about 36 % of total species were influenced by the effective temperature of the habitats, and the relative coverage of about 20% of them correlated significantly with the effective temperature. Eight species showed a negative correlation between their relative coverage and effective temperature, and eleven species had a positive correlation between their relative coverage or aboveground biomass and effective temperature. The eleven species with a positive correlation had certain drought resistance feature or a tendency distributing towards warmer habitats. Concerning the effectiveness of species feature applied in the analysis, relative coverage could be used to determine the relationship between species distribution and effective temperature efficiently, if the species frequency ranged from 90 % to 20 %. But, for the dominant species with their frequency over 90 %, aboveground biomass seemed to be more suitable for the analysis.
Jiang
Yuan
Y
Beijing Normal University, Beijing 100875, China. jiangy@bnu.edu.cn
Huang
Qiuru
Q
Han
Jingsha
J
Huang
Xiaoxia
X
Liu
Quanru
Q
D000531:Altitude; D002681:China; D017753:Ecosystem; D063245:Plant Development; D006109:Poaceae / Q000254:growth & development*; D013696:Temperature