兰州大学机构库 >生命科学学院
海拔对高寒草甸生态参数季节性变化的影响-以野牛沟流域为例
Alternative TitleThe dynamic of ecological parameters of alpine meadow and its relationship with altitude: a case study in the basin of Yeniugou
陶林浩
Thesis Advisor杜国祯
2016-06-04
Degree Grantor兰州大学
Place of Conferral兰州
Degree Name硕士
Keyword野牛沟流域 高寒草甸 生态参数 海拔
Abstract高寒草甸丛高在3300m海拔梯度上丛高最大,其次为3180m海拔梯度,在海拔3400m丛高最小;叶面积指数在海拔梯度上的变化为在海拔3300m值最大, 3180m海拔梯度上高寒草甸叶面积指数其次,3400m海拔带上值最小;3300m海拔上高寒草甸高寒草甸地上生物量最大,其次为3180m海拔梯度,3400m海拔上地上生物量最小;高寒草甸在生长季期间地下生物量海拔梯度上变化:在生长初期3400m海拔带高寒草甸地下生物量高于其他海拔梯度,在生长末期3180m海拔梯度上高寒草甸地下生物量高于其他海拔梯度;高寒草甸在生长季不同海拔梯度上地下生物量/地上生物量(R/S)变化:在生长季期间高寒草甸在3400m海拔梯度上R/S值最高,在3180m和3300m海拔带上R/S基本接近。高寒草地的生产力随海拔呈单峰曲线的变化模式,即随着海拔的升高生产力先增加后减少,这体现了海拔对植物生长环境影响的综合性。通过我们的实验结果可以预测在降雨充足的地方气候变暖可促进祁连山地区高寒草甸的生产力,但是在降雨较少的地方,气候变暖会抑制该植物群落的生产力。在野牛沟流域,全球气候变暖能使海拔在3300m以上的区域的高寒草甸的生产力增加,但是在海拔为3300以下的区域全球气候变暖使高寒草甸的生产力降低。
Other Abstractheight of alpine meadow was highest at the elevation of 3300 m, following by 3180 m and shortest at the elevation of 3400 m; leaf area index and above-ground biomass of alpine meadow also were largest at the elevation of 3300 m, following by 3180 m and smallest at the elevation of 3400 m; at the beginning of the growing season underground biomass was much larger at the elevation of 3400 m than at other two elevations, however, as the growing season went on, the underground biomass at the three elevations get closer and closer, and finally, no significant difference between the three elevations at the end of the growing season; underground biomass/ground biomass (R/S) of alpine meadow also was changed during the growing season: the R/S was larger at the elevation of 3400 m the other two elevations, and the values of R/S of the three elevations got closer and closer as the growing season went on, and at the end of the growing season there were no significant differences between the R/S of the three elevations. The above results showed that the ecological parameters of alpine meadow were changed with altitude during growing season. Our results also can give us some insight on how global warming affects the productivity of alpine meadow. The relationship between grassland productivity may affected by altitude. Below the elevation of 3300m, global warming may decrease grassland productivity, however, above 3300m, global warming may increase grassland productivity.
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Language中文
Document Type学位论文
Identifierhttps://ir.lzu.edu.cn/handle/262010/221276
Collection生命科学学院
Recommended Citation
GB/T 7714
陶林浩. 海拔对高寒草甸生态参数季节性变化的影响-以野牛沟流域为例[D]. 兰州. 兰州大学,2016.
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