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| Titel |
Identifying the relative contributions of climate and grazing to both
direction and magnitude of alpine grassland productivity dynamic from 1993
to 2011 on the Northern Tibetan Plateau |
| VerfasserIn |
Jianshuang Wu, Yunfei Feng, Jing Zhang, Xianzhou Zhang, Chunqiao Song |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250137466
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| Publikation (Nr.) |
 EGU/EGU2017-186.pdf |
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| Zusammenfassung |
| Alpine grasslands on the Tibetan Plateau are claimed to be sensitive and vulnerable to climate
change and human disturbance. The mechanisms, directions and magnitudes of climatic and
anthropogenic influences on net primary productivity (NPP) of various alpine pastures remain
under debate. Here, we stimulated the potential (with only climate variables considered) and
actual (based on remote sensing dataset) productivity (NPPP and NPPA) from 1993 to
2011, and termed the difference between NPPP and NPPA as NPPpc to explore
how much forage can be potentially consumed by livestock. The productivity that
has been consumed by livestock (or for meat output) was defined as NPPac and
transformed from meat production and daily forage consumption. We hypothesized
that the NPPgap between NPPpc and NPPac indicates the direction of vegetation
dynamics, restoration or degradation. Our results show that growing season precipitation
rather than temperature significantly relates with NPPgap, although warming was
significant for the entire study region while precipitation only significantly increased
in the northeastern places. On the Northern Tibetan Plateau, 69.05% of available
alpine pastures have been restored with positive NPPgap, and for 58.74% of alpine
pastures the stocking rate is suggested to increase in the future because of the positive
mean NPPgap and its increasing trend. This study provides a potential framework
for regionally regulating grazing management, with aims to restore the degraded
pastures and sustainable management of the healthy pastures on the Tibetan Plateau. |
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