干旱区生态环境知识资源中心(Arid): Elevational differences in the net primary productivity response to climate constraints in a dryland mountain ecosystem of northwestern China

Arid

DOI	10.1002/ldr.3587
	Elevational differences in the net primary productivity response to climate constraints in a dryland mountain ecosystem of northwestern China
	Xu, Hao-jie; Zhao, Chuan-yan; Wang, Xin-ping
通讯作者	Xu, HJ
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2020
卷号	31 期号:15 页码:2087-2103
英文摘要	Dryland mountain ecosystems regulate global terrestrial carbon cycling and show high sensitivity to climate variability. The Qilian Mountains (QLMs) typify dryland mountain ranges in northern temperate belts and offer fundamental ecosystem services including forage production and water conservation. However, dominant controls on the interannual trend and variability of net primary productivity (NPP) in this region are unknown. Thus, we examined magnitude and direction of the NPP trend and quantified NPP sensitivity to temperature and precipitation under different biomes and altitudes using ground and remote sensing data. Our results showed that 12% of the QLMs had a reversed NPP trend from increasing to decreasing from 2000 to 2016, particularly in the western and southern parts, where NPP reductions were related to precipitation deficits. About 34% of the QLMs showed accelerated or persistent increasing NPP trends, mainly from the mid-altitude between 3,100 and 4,300 m. The growth rate of NPP was higher in deserts and grasslands than in forests and increased in deserts but decreased in forests and grasslands with increasing elevation. Precipitation showed a stronger effect on the interannual variability in NPP than temperature did. The temperature sensitivity of NPP was similar along elevation gradients in forest steppes but decreased with increasing elevation in alpine deserts. The precipitation sensitivity of NPP reached highest in shrubby meadows when compared with coniferous forests and alpine deserts. This research provides new insights into climate controls of the NPP over the QLMs and to present drought as a growing threat to shrubby meadows and alpine deserts.
英文关键词	climatic controls dryland ecosystems elevational gradients NPP sensitivity vegetation productivity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000563698200001
WOS关键词	LIGHT-USE EFFICIENCY ; GROSS PRIMARY PRODUCTIVITY ; COMPARING GLOBAL-MODELS ; QILIAN MOUNTAINS ; LAND-USE ; NITROGEN DEPOSITION ; SEMIARID ECOSYSTEMS ; PLANT-DISTRIBUTION ; PICEA-CRASSIFOLIA ; TIBETAN PLATEAU
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/325879
作者单位	[Xu, Hao-jie; Zhao, Chuan-yan] Lanzhou Univ, State Key Lab Grassland Agroecosyst, Lanzhou 730020, Peoples R China; [Xu, Hao-jie; Zhao, Chuan-yan] Lanzhou Univ, Key Lab Grassland Livestock Ind Innovat, Minist Agr & Rural Affairs, Lanzhou 730020, Peoples R China; [Xu, Hao-jie; Zhao, Chuan-yan] Lanzhou Univ, Engn Res Ctr Grassland Ind, Minist Educ, Lanzhou 730020, Peoples R China; [Xu, Hao-jie; Zhao, Chuan-yan] Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Lanzhou 730020, Peoples R China; [Wang, Xin-ping] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Shapotou Desert Res & Expt Stn, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Xu, Hao-jie,Zhao, Chuan-yan,Wang, Xin-ping. Elevational differences in the net primary productivity response to climate constraints in a dryland mountain ecosystem of northwestern China[J]. 兰州大学,2020,31(15):2087-2103.
APA	Xu, Hao-jie,Zhao, Chuan-yan,&Wang, Xin-ping.(2020).Elevational differences in the net primary productivity response to climate constraints in a dryland mountain ecosystem of northwestern China.LAND DEGRADATION & DEVELOPMENT,31(15),2087-2103.
MLA	Xu, Hao-jie,et al."Elevational differences in the net primary productivity response to climate constraints in a dryland mountain ecosystem of northwestern China".LAND DEGRADATION & DEVELOPMENT 31.15(2020):2087-2103.