Irrigation effects on alpine grassland productivity and its species diversity in Northern Tibet

H.Ganjurjav, 干珠扎布; Minjie, 段敏杰 Duan; Yaqi, 郭亚奇 Guo; Weina, 张伟娜 Zhang; Yan, 梁艳 Liang; Qingzhu, 高清竹 Gao; Luobu, 旦久罗布 Danjiu; Yuzhen, 白玛玉珍 Baima; Zhuoma, 西绕卓玛 Xirao

doi:10.5846/stxb201403310599

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“…First, at the scale of contributed to the improvement of vegetation conditions. Studies showed that through irrigation, the grassland biomass in Tibet could be significantly increased (Ganjurjav et al, 2014(Ganjurjav et al, , 2015. Above all, the proportion of shrubs and broad-leaved forbs was also increased under irrigation conditions.…”

Section: Discussionmentioning

confidence: 98%

Influences of population pressure change on vegetation greenness in China's mountainous areas

Tan

et al. 2017

Ecology and Evolution

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Mountainous areas in China account for two‐thirds of the total land area. Due to rapid urbanization, rural population emigration in China's mountainous areas is very significant. This raises the question to which degree such population emigration influences the vegetation greenness in these areas. In this study, 9,753 sample areas (each sample measured about 64 square kilometers) were randomly selected, and the influences of population emigration (population pressure change) on vegetation greenness during 2000–2010 were quantitatively expressed by the multivariate linear regression (MLR) model, using census data under the condition of controlling the natural elements such as climatic and landform factors. The results indicate that the vegetation index in the past 10 years has presented an increasing overall trend, albeit with local decrease in some regions. The combined area of the regions with improved vegetation accounted for 81.7% of the total mountainous areas in China. From 2000 to 2010, the rural population significantly decreased, with most significant decreases in the northern and central areas (17.2% and 16.8%, respectively). In China's mountainous areas and in most of the subregions, population emigration has significant impacts on vegetation change. In different subregions, population decrease differently influenced vegetation greenness, and the marginal effect of population decrease on vegetation change presented obvious differences from north to south. In the southwest, on the premise of controlling other factors, a population decrease by one unit could increase the slope of vegetation change by 16.4%; in contrast, in the southeastern, northern, northeastern, and central area, the proportion was about 15.5%, 10.6%, 9.7%, and 7.5%, respectively, for improving the trend of NDVI variation.

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Section: Discussionmentioning

confidence: 98%

Influences of population pressure change on vegetation greenness in China's mountainous areas

Tan

et al. 2017

Ecology and Evolution

View full text Add to dashboard Cite

show abstract

Irrigation effects on alpine grassland productivity and its species diversity in Northern Tibet

Cited by 1 publication

References 0 publications

Influences of population pressure change on vegetation greenness in China's mountainous areas

Influences of population pressure change on vegetation greenness in China's mountainous areas

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