Potential impacts of climate change on vegetation dynamics and ecosystem function in a mountain watershed on the Qinghai-Tibet Plateau

Zhou, Decheng; Hao, Lu; Kim, John B.; Liu, Peilong; Pan, Cen; Liu, Yongqiang; Sun, Ge

doi:10.1007/s10584-019-02524-4

Cited by 27 publications

(11 citation statements)

References 52 publications

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“…The Tibetan Plateau (TP) is not only the main source of rivers in China and Asia, but also an important ecological barrier that is highly sensitive to global climate change [29][30][31]. The TP is a unique alpine mountain ecosystem that has had an intense response to climate change, especially in agriculture and animal husbandry [32][33][34]. More importantly, the water budget and energy exchange in the region have a considerable impact on the intensity of the Asian monsoon and high pressure [35,36].…”

Section: Introductionmentioning

confidence: 99%

Variation in Reference Evapotranspiration over the Tibetan Plateau during 1961–2017: Spatiotemporal Variations, Future Trends and Links to Other Climatic Factors

Liu

Wang

Yao

et al. 2020

Water

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Reference evapotranspiration (ET0) is a key factor in the hydrological cycle and energy cycle. In the context of rapid climate change, studying the dynamic changes in ET0 in the Tibetan Plateau (TP) is of great significance for water resource management in Asian countries. This study uses the Penman–Monteith formula to calculate the daily ET0 of the TP and subsequently uses the Mann–Kendall (MK) test, cumulative anomaly curve, and sliding t-test to identify abrupt change points. Morlet wavelet analysis and the Hurst index based on rescaled range analysis (R/S) are utilized to predict the future trends of ET0. The Spearman correlation coefficient is used to explore the relationship between ET0 changes and other climate factors. The results show that the ET0 on the TP exhibited an increasing trend from 1961 to 2017, with the most significant increase occurring in winter; an abrupt change to a tendency to decrease occurred in 1988, and another abrupt change to a tendency to increase occurred in 2005. Spatially, the ET0 of the TP shows an increasing trend from east to west. The change trend of the ET0 on the TP will not be sustainable into the future. In addition, the mean temperature has the greatest impact on the ET0 changes in the TP.

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Section: Introductionmentioning

confidence: 99%

Variation in Reference Evapotranspiration over the Tibetan Plateau during 1961–2017: Spatiotemporal Variations, Future Trends and Links to Other Climatic Factors

Liu

Wang

Yao

et al. 2020

Water

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“…At the regional scale, owing to the effect of water and heat dynamics, the climate governs the distribution of vegetation. At the local scale, vegetation alteration or changes is closely related to human activities (Zhou et al , 2019; Shao et al , 2014). When thinking out of the box, it can be seen that some factors like site soil geology and groundwater level existence also influence or affect the NDVI-rainfall and NDVI-temperature relationship (Liang and Yang, 2016).…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Spatio-temporal vegetation cover analysis to determine climate change in Papua New Guinea

Sekac

Jana

Pal

2022

IJDRBE

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Purpose The climate change and related impacts are experienced around the world. There arise different triggering factors to climate change and impact. The purpose of this study is to figure out how changes in vegetation cover may or may not have an impact to climate change. The research will produce ideas for vegetation preservation and replant. Design/methodology/approach The investigation was probed for 34 years’ time period starting from the year 1981 to 2015. After testing and checking for serial autocorrelation in the vegetation data series, Mann–Kendal nonparametric statistical evaluation was carried out to investigate vegetation cover trends. Sen’s method was deployed to investigate the magnitude of vegetation cover change in natural differential vegetation index (NDVI) unit per year. Furthermore, the ArcGIS spatial analysis tools were used for the calculation of mean NDVI distribution and also for carrying out the spatial investigation of trends at each specific location within the study region. Findings The yearly mean NDVI during the study period was observed to have a decreasing trend. The mean NDVI value ranges between 0.32 and 0.98 NDVI unit, and hence, this means from less or poor vegetated zones to higher or healthier vegetated zones. The mean NDVI value was seen decreasing toward the highlands regions. The NDVI-rainfall correlation was observed to be stronger than the NDVI-temperature correlation. The % area coverage of NDVI-rainfall positive correlation was higher than the negative correlation. The % area coverage of NDVI-temperature negative correlation was higher than the positive correlation within the study region. Rainfall is seen as a highly influencing climatic factor for vegetation growth than the temperature within the study region. Originality/value This study in this country is a new approach for climate change monitoring and planning for the survival of the people of Papua New Guinea, especially for the farmer and those who is living in the coastal area.

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“…HRB originates from northern Qilian mountain on the Qinghai‐Tibet Plateau, and the UHRB covers an area of 27 × 10 3 km 2 (97°29′–101°32′E, 37°43′–39°39′N) (Figure 1) (Tian et al, 2019; Zhou et al, 2019). In the UHRB, most areas are located between 2000 and 5,000 m above sea level (Li et al, 2009).…”

Section: Study Areamentioning

confidence: 99%

“…Hei River Basin (HRB) is the Chinese second largest inland river and is part of the Asia's water tower—the Qinghai‐Tibet plateau (Zhou et al, 2019). Recently, increased risk of water shortages has intensified the conflicts of water use between midstream and downstream (Chen, John, et al, 2015; Chen et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Rational Planning of Land Use Can Maintain Water Yield Without Damaging Ecological Stability in Upstream of Inland River: Case Study in the Hei River Basin of China

Zhang

et al. 2020

JGR Atmospheres

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Upstream inland rivers provide most of water resources for midstream and downstream in arid and semiarid regions. From the perspective of ecological rehabilitation, it is necessary to simultaneously ensure upstream streamflow while still maintaining economy-ecosystem balance in upstream. However, vegetation dynamics effects caused by ecological rehabilitation cannot be well evaluated in previous studies due to the sparseness of observations at regional scales. With increased availability of vegetation and hydrological data, it is now possible to explore the relationship between water yield and ecological balance affected by vegetation dynamics. This study takes Upper Hei River Basin, part of the Asia's water tower-the Qinghai-Tibet Plateau, as an example and uses the Eagleson's ecohydrological model to explore the effects of vegetation dynamics on streamflow and ecology in growing seasons during 1992-2015. We compare scenarios with and without vegetation changes and find that there is limited evidence that ecological rehabilitation could enhance water yield. Approximately 51.31% of Upper Hei River Basin vegetation cover (M) tends to deviate from ecological optimization state compared to equilibrium vegetation cover (M eq). In order to explore ways to ensure streamflow and maintain ecology, different vegetation scenarios are simulated. Results show that on average, grazing in area where M is larger than M eq could increase streamflow by approximately 7.3%/year and planting trees in other area could increase streamflow by approximately 2.9%/year. Therefore, effective control on vegetation dynamics can simultaneously ensure streamflow and maintain ecological balance, which can also provide guidance and theoretical support for upstream inland river planning.

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Potential impacts of climate change on vegetation dynamics and ecosystem function in a mountain watershed on the Qinghai-Tibet Plateau

Cited by 27 publications

References 52 publications

Variation in Reference Evapotranspiration over the Tibetan Plateau during 1961–2017: Spatiotemporal Variations, Future Trends and Links to Other Climatic Factors

Variation in Reference Evapotranspiration over the Tibetan Plateau during 1961–2017: Spatiotemporal Variations, Future Trends and Links to Other Climatic Factors

Spatio-temporal vegetation cover analysis to determine climate change in Papua New Guinea

Rational Planning of Land Use Can Maintain Water Yield Without Damaging Ecological Stability in Upstream of Inland River: Case Study in the Hei River Basin of China

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