气候变化领域集成服务门户(CCPortal): Driving mechanisms of gross primary productivity geographical patterns for Qinghai-Tibet Plateau lake systems

CCPortal

DOI	10.1016/j.scitotenv.2021.148286
	Driving mechanisms of gross primary productivity geographical patterns for Qinghai-Tibet Plateau lake systems
	Jia, Junjie; Wang, Yafeng; Lu, Yao; Sun, Kun; Lyu, Sidan; Gao, Yang
通讯作者	Gao, Y (通讯作者)
发表日期	2021
ISSN	0048-9697
EISSN	1879-1026
卷号	791
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.
关键词	NITROGEN DEPOSITION VARIABILITY COMMUNITIES DIVERSITY RADIATION WATER
英文关键词	Gross primary productivity (GPP); Alpine lakes; Altitude; Salinity; Climatic change; Qinghai-Tibet Plateau (QTP)
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000686012800002
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260188
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]. 中国科学院青藏高原研究所,2021,791.
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.
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).