水土保持研究2024，Vol.31Issue(6)：299-308,10.DOI:10.13869/j.cnki.rswc.2024.06.044
阿勒泰林区不同草地群落特征对水热因子的响应
Response of Different Grassland Community Characteristics to Hydrothermal Factors in Altai Forest Area
摘要
Abstract
[Objective]The aims of this study are to explore the response of plant species richness(SR)of different grassland communities to mean annual temperature(MAT),precipitation(MAP),and altitude in Altai Forest Region,and to provide scientific basis for the restoration and management of degraded grassland in this region.[Methods]Five grassland types within the range of 600～3 914 m in Altai Forest Region were selected as the research objects.The species lists of 165 sample plots were investigated using sample methods to analyze the changing characteristics of the family and genus species of various types of grassland plants.[Results](1)The composition of grassland species in Altai forest area of Xinjiang was mainly dominated by Asteraceae,Poaceae and Fabaceae,with Puccinellia,Taraxacum,Alchemilla,and Deschampsia as the dominant genera.However,the proportion of each family and genus in different types of grassland varied.(2)Species richness(SR)varied across grasslands,with mountain meadow grassland having the highest species richness(8.86)and alpine meadow(4.75)the lowest.(3)Differences in the response of species richness of different types of grassland to mean annual temperature(MAT)and precipitation(MAP)in the Altay forest region of Xinjiang were mainly due to differences in vegetation types and spatial variability of climatic factors,whereas their variability for elevation originated from the range of altitudinal gradients and large-scale climatic characteristics of the study area.[Conclusion]Differences in the response of different grassland types to temperature and precipitation are due to the spatial heterogeneity of vegetation types and temperature and precipitation;and the different hydrothermal conditions at different altitudinal gradients lead to some differences between species richness.关键词
植物丰富度/草地类型/海拔/年均降水/年均温度Key words
plant richness/grassland type/elevation/mean annual precipitation/mean annual temperature分类
农业科技引用本文复制引用
李苗苗,叶茂,陈维龙,潘晓婷,曾国燕,贺清智,张西..阿勒泰林区不同草地群落特征对水热因子的响应[J].水土保持研究,2024,31(6):299-308,10.基金项目
国家自然科学基金项目(42161004) （42161004）
NSFC-新疆联合资助项目(U1803245) （U1803245）
