新疆不同草地类型植物物种特征与水热因子的关系研究
刘利利;  盛建东;  程军回;  刘耘华;  李瑞霞;  赵丹
2018-09-21
其他题名RelationshipbetweenplantspeciescharacteristicsandclimatefactorsindifferentgrasslandtypesofXinjiang
卷号25期号:5页码:1
摘要本文以新疆7种草地为研究对象,调查364个样地的物种名录,分析不同草地植物科属种的变化特征,探讨了植物物种丰富度(SR)对年平均温度(MAT)、降水(MAP)、海拔的响应。研究结果表明,新疆草地以禾本科、菊科为优势科,优势属为针茅属、绢蒿属;物种丰富度变化为:温性草甸草原(7.73)>温性草原(5.04)>高寒草原(4.36)>温性荒漠草原(3.99)>温性草原化荒漠(3.02)>温性荒漠(2.08)>低平地草甸(1.43);全部样地和温性草原的SR与MAP呈正相关,与MAT、海拔呈峰型关系;低平地草甸和高寒草原的SR与MAP呈正相关而与MAT呈负相关,与海拔呈先降低再增加的趋势;温性荒漠草原的SR与MAP呈正相关,与MAT、海拔无相关性;温性荒漠的SR与MAP呈正相关,与MAT呈负相关,与海拔呈峰型关系;温性草甸草原和温性草原化荒漠的SR与MAT、MAP均无相关性。不同草地类型对温度、降水响应的差异,是由于植被类型和温度、降水的空间分异性,对于海拔的分异,来源于海拔梯度范围和所研究地区大尺度的气候特征。
其他摘要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 temperature (MAT) and altitude. The Poaceae and Ateraceae were the dominant families;and Stipa;and Seriphidium were among the dominant genera at all sites. The grassland types ranked for SR (from high to low): temperate 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 positively 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 significantly 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 grassland 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 altitude grassland mean annual precipitation mean annual temperature species richness
DOI10.11686/cyxb2015517
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条目标识符http://119.78.100.147:8080/handle/2SELTVKS/54898
专题骨干期刊_草业学报
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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],2018,25(5):1.
APA 刘利利;盛建东;程军回;刘耘华;李瑞霞;赵丹.(2018).新疆不同草地类型植物物种特征与水热因子的关系研究.,25(5),1.
MLA 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".25.5(2018):1.
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