Driving mechanisms of gross primary productivity geographical patterns for Qinghai-Tibet Plateau lake systems

doi:10.1016/j.scitotenv.2021.148286

	Driving mechanisms of gross primary productivity geographical patterns for Qinghai-Tibet Plateau lake systems
	Jia, Junjie 1,2; Wang, Yafeng 3; Lu, Yao 1,2; Sun, Kun 1; Lyu, Sidan 1; Gao, Yang 1,2
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2021-10-15
卷号	791 页码:11
关键词	Gross primary productivity (GPP) Alpine lakes Altitude Salinity Climatic change Qinghai-Tibet Plateau (QTP)
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2021.148286
通讯作者	Gao, Yang(gaoyang@igsnrr.ac.cn)
英文摘要	Being a fundamental property of aquatic systems, gross primary productivity (GPP) is affected by complex environmental factors, such as salinity, nutrients, pH, and sunlight. Under conditions of intensified anthropogenic activity and climate change, it is critical to understand the driving mechanisms of GPP in alpine lakes. In this study, we investigated GPP and associated environmental factors of 23 lake systems in the Qinghai-Tibet Plateau (QTP) along an altitudinal range (from 2500 m to 4500 m). Results showed an increase in chlorophyll a (Chl a) content as altitude increased and a corresponding decrease as salinity increased. Furthermore, geographical patterns of GPP were higher at the mid-gradient and lower at the extreme gradient. Higher solar radiation and water temperatures, stronger evaporation and higher salinity levels, and lower pH and higher nutrient content were all driving mechanisms of GPP in low altitudinal lake systems within high latitudinal regions. Such conditions have collectively resulted in the current GPP pattern via the promotion or inhibition of phytoplankton growth and photosynthesis. Specifically, geographical features and climate change jointly drive algal growth and GPP of alpine lake systems via internal circulation processes; however, anthropogenic activities interfere with external circulation processes for most of lower-middle altitudinal lake systems, thus playing a certain role in regulating environmental factors and GPP alongside climate change. (c) 2021 Elsevier B.V. All rights reserved.
资助项目	National Nature Science Foundation of China[31988102] ; National Nature Science Foundation of China[41971134] ; National Nature Science Foundation of China[41922003] ; Second Tibetan Plateau Scientific Expedition and Research Program[2019QZKK060602]
WOS关键词	NITROGEN DEPOSITION ; VARIABILITY ; COMMUNITIES ; DIVERSITY ; RADIATION ; WATER
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000686012800002
资助机构	National Nature Science Foundation of China ; Second Tibetan Plateau Scientific Expedition and Research Program
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/164683]
专题	中国科学院地理科学与资源研究所
通讯作者	Gao, Yang
作者单位	1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosystem Network Observat & Modeling, Beijing 100101, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Jia, Junjie,Wang, Yafeng,Lu, Yao,et al. Driving mechanisms of gross primary productivity geographical patterns for Qinghai-Tibet Plateau lake systems[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2021,791:11.
APA	Jia, Junjie,Wang, Yafeng,Lu, Yao,Sun, Kun,Lyu, Sidan,&Gao, Yang.(2021).Driving mechanisms of gross primary productivity geographical patterns for Qinghai-Tibet Plateau lake systems.SCIENCE OF THE TOTAL ENVIRONMENT,791,11.
MLA	Jia, Junjie,et al."Driving mechanisms of gross primary productivity geographical patterns for Qinghai-Tibet Plateau lake systems".SCIENCE OF THE TOTAL ENVIRONMENT 791(2021):11.