草业学报2016，Vol.25Issue(5)：1-12,12.DOI:10.11686/cyxb2015517
新疆不同草地类型植物物种特征与水热因子的关系研究
Relationship between plant species characteristics and climate factors in different grassland types of Xinjiang
摘要
Abstract
For 364 field sites representing seven grassland types in Xinjiang,species lists were compiled,and the distribution of plant families,genera and species across the different grassland types cataloged.In addition, we examined the species richness (SR)response to mean annual precipitation (MAP),mean annual tempera-ture (MAT)and altitude.The Poaceae and Ateraceae were the dominant families,and Stipa,and Seriphidi-um were among the dominant genera at all sites.The grassland types ranked for SR (from high to low):tem-perate meadow steppe (7.73 ),temperate steppe (5.04 ),alpine steppe (4.36 ),temperate desert steppe (3.99),temperate steppe desert (3.02),temperate desert (2.08),low plain meadow (1.43).Patterns of SR response to MAP,MAT and altitude were also detected.In Xinjiang grassland temperate steppe,SR was posi-tively and linearly related to MAP,but unimodally related to MAT and altitude.In alpine steppe and low plain meadow,SR was positively and linearly related with MAP and negatively related with MAT,but SR decreased from low to mid altitude and then increased with increasing altitude.In temperate desert steppe,SR was signif-icantly positively related to MAP,but was not significantly related to MAT and altitude.In alpine steppe and low plain meadow,the SR was positively and linearly related to MAP and negatively related to MAT,but unimodally related to altitude.No significant relationship was found between SR and MAT,MAP,or altitude in temperate meadow steppe and temperate steppe desert grasslands.The above results in the different grass-land types might be explained by response characteristics of particular species,spatial variation of temperature and precipitation,and the altitude range,steepness of slope and large scale climate characteristics of the study area.关键词
海拔/草地/年平均降水/年平均温度/物种丰富度Key words
altitude/grassland/mean annual precipitation/mean annual temperature/species richness引用本文复制引用
刘利利,盛建东,程军回,刘耘华,李瑞霞,赵丹..新疆不同草地类型植物物种特征与水热因子的关系研究[J].草业学报,2016,25(5):1-12,12.基金项目
中国科学院战略性先导科技专项（XDA05050400）和新疆维吾尔自治区土壤学重点学科资助。 （）
