Trends in climate change and human interventions indicate grassland productivity on the Qinghai–Tibetan Plateau from 1980 to 2015

Changes in global climate patterns and human activity have the potential to alter key components of terrestrial ecosystems, such as the productivity of grasslands. The Qinghai–Tibetan Plateau is one of the most sensitive regions and is affected by substantial climatic changes and intensive human act...

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Autores principales:	Qinli Xiong, Yang Xiao, Pinghan Liang, Lingjuan Li, Lin Zhang, Ting Li, Kaiwen Pan, Chenggang Liu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Anthropogenic activities Climate change Ecological restoration Grassland productivity Redundancy analysis Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/cd0424f5c007415db6b054815607f1e8
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spelling	oai:doaj.org-article:cd0424f5c007415db6b054815607f1e82021-12-01T04:57:55ZTrends in climate change and human interventions indicate grassland productivity on the Qinghai–Tibetan Plateau from 1980 to 20151470-160X10.1016/j.ecolind.2021.108010https://doaj.org/article/cd0424f5c007415db6b054815607f1e82021-10-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21006750https://doaj.org/toc/1470-160XChanges in global climate patterns and human activity have the potential to alter key components of terrestrial ecosystems, such as the productivity of grasslands. The Qinghai–Tibetan Plateau is one of the most sensitive regions and is affected by substantial climatic changes and intensive human activities. In this study, the spatial distribution and temporal variation in grassland productivity from 1980 to 2015 were examined using the proxy net primary productivity (NPP). Trend and redundancy analyses were used to determine the contributions of driving indicators (climate change and human interventions) to the changes in NPP. During the past 35 years, the trend in grassland productivity across the Qinghai–Tibetan Plateau was one of significant increasing trend (increase of 1.08 g C/m2/year). A trend of increase of NPP was observed for approximately 82.79% of the total grassland area, with most of this area distributed in the central region. However, a trend of degradation was observed in the northwestern region of the plateau. The primary reason for the complex spatial pattern and distribution of vegetation productivity was unsynchronized changes in temperature and precipitation. Therefore, temperature and water content (precipitation and melting water) were not good indicators for trends in NPP in this area. Moreover, although variation in rainfall and temperature explained 9.75% of the variation in grassland productivity, the effects of human interventions were greater (23.48%). According to the redundancy analysis, the positive contribution of ecological restoration projects (reducing the negative effects of humans) was the most important indicator in the entire study area, followed by temperature (conducive to vegetation growth and acceleration of melting glaciers). Most conservation policies produced significant positive effects on the restoration of grasslands and prevented or reversed the degradation of grasslands on the plateau. Under increases in temperature and moisture on the Qinghai–Tibetan Plateau, the ecological restoration policies in conservation areas demonstrate an “increasing trend in grassland productivity.”Qinli XiongYang XiaoPinghan LiangLingjuan LiLin ZhangTing LiKaiwen PanChenggang LiuElsevierarticleAnthropogenic activitiesClimate changeEcological restorationGrassland productivityRedundancy analysisEcologyQH540-549.5ENEcological Indicators, Vol 129, Iss , Pp 108010- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Anthropogenic activities Climate change Ecological restoration Grassland productivity Redundancy analysis Ecology QH540-549.5
spellingShingle	Anthropogenic activities Climate change Ecological restoration Grassland productivity Redundancy analysis Ecology QH540-549.5 Qinli Xiong Yang Xiao Pinghan Liang Lingjuan Li Lin Zhang Ting Li Kaiwen Pan Chenggang Liu Trends in climate change and human interventions indicate grassland productivity on the Qinghai–Tibetan Plateau from 1980 to 2015
description	Changes in global climate patterns and human activity have the potential to alter key components of terrestrial ecosystems, such as the productivity of grasslands. The Qinghai–Tibetan Plateau is one of the most sensitive regions and is affected by substantial climatic changes and intensive human activities. In this study, the spatial distribution and temporal variation in grassland productivity from 1980 to 2015 were examined using the proxy net primary productivity (NPP). Trend and redundancy analyses were used to determine the contributions of driving indicators (climate change and human interventions) to the changes in NPP. During the past 35 years, the trend in grassland productivity across the Qinghai–Tibetan Plateau was one of significant increasing trend (increase of 1.08 g C/m2/year). A trend of increase of NPP was observed for approximately 82.79% of the total grassland area, with most of this area distributed in the central region. However, a trend of degradation was observed in the northwestern region of the plateau. The primary reason for the complex spatial pattern and distribution of vegetation productivity was unsynchronized changes in temperature and precipitation. Therefore, temperature and water content (precipitation and melting water) were not good indicators for trends in NPP in this area. Moreover, although variation in rainfall and temperature explained 9.75% of the variation in grassland productivity, the effects of human interventions were greater (23.48%). According to the redundancy analysis, the positive contribution of ecological restoration projects (reducing the negative effects of humans) was the most important indicator in the entire study area, followed by temperature (conducive to vegetation growth and acceleration of melting glaciers). Most conservation policies produced significant positive effects on the restoration of grasslands and prevented or reversed the degradation of grasslands on the plateau. Under increases in temperature and moisture on the Qinghai–Tibetan Plateau, the ecological restoration policies in conservation areas demonstrate an “increasing trend in grassland productivity.”
format	article
author	Qinli Xiong Yang Xiao Pinghan Liang Lingjuan Li Lin Zhang Ting Li Kaiwen Pan Chenggang Liu
author_facet	Qinli Xiong Yang Xiao Pinghan Liang Lingjuan Li Lin Zhang Ting Li Kaiwen Pan Chenggang Liu
author_sort	Qinli Xiong
title	Trends in climate change and human interventions indicate grassland productivity on the Qinghai–Tibetan Plateau from 1980 to 2015
title_short	Trends in climate change and human interventions indicate grassland productivity on the Qinghai–Tibetan Plateau from 1980 to 2015
title_full	Trends in climate change and human interventions indicate grassland productivity on the Qinghai–Tibetan Plateau from 1980 to 2015
title_fullStr	Trends in climate change and human interventions indicate grassland productivity on the Qinghai–Tibetan Plateau from 1980 to 2015
title_full_unstemmed	Trends in climate change and human interventions indicate grassland productivity on the Qinghai–Tibetan Plateau from 1980 to 2015
title_sort	trends in climate change and human interventions indicate grassland productivity on the qinghai–tibetan plateau from 1980 to 2015
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/cd0424f5c007415db6b054815607f1e8
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Trends in climate change and human interventions indicate grassland productivity on the Qinghai–Tibetan Plateau from 1980 to 2015

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