Hydrological regulation drives regime shifts: evidence from   paleolimnology and ecosystem modeling of a large shallow Chinese lake

doi:10.1111/gcb.13416

CORC > 北京大学 > 城市与环境学院

	Hydrological regulation drives regime shifts: evidence from paleolimnology and ecosystem modeling of a large shallow Chinese lake
	Kong, Xiangzhen ; He, Qishuang ; Yang, Bin ; He, Wei ; Xu, Fuliu ; Janssen, Annette B. G. ; Kuiper, Jan J. ; van Gerven, Luuk P. A. ; Qin, Ning ; Jiang, Yujiao ; Liu, Wenxiu ; Yang, Chen ; Bai, Zelin ; Zhang, Min ; Kong, Fanxiang ; Janse, Jan H. ; Mooij, Wolf M.
刊名	GLOBAL CHANGE BIOLOGY
	2017
关键词	Lake Chaohu nutrient loading paleolimnology PCLake regime shift water level control ALTERNATIVE STABLE STATES WATER-LEVEL FLUCTUATIONS LONG-TERM SUBMERGED MACROPHYTES CRITICAL TRANSITION EUTROPHIC LAKE CHAOHU LAKE CLIMATE MANAGEMENT PHOSPHORUS
DOI	10.1111/gcb.13416
英文摘要	Quantitative evidence of sudden shifts in ecological structure and function in large shallow lakes is rare, even though they provide essential benefits to society. Such regime shifts' can be driven by human activities which degrade ecological stability including water level control (WLC) and nutrient loading. Interactions between WLC and nutrient loading on the long-term dynamics of shallow lake ecosystems are, however, often overlooked and largely underestimated, which has hampered the effectiveness of lake management. Here, we focus on a large shallow lake (Lake Chaohu) located in one of the most densely populated areas in China, the lower Yangtze River floodplain, which has undergone both WLC and increasing nutrient loading over the last several decades. We applied a novel methodology that combines consistent evidence from both paleolimnological records and ecosystem modeling to overcome the hurdle of data insufficiency and to unravel the drivers and underlying mechanisms in ecosystem dynamics. We identified the occurrence of two regime shifts: one in 1963, characterized by the abrupt disappearance of submerged vegetation, and another around 1980, with strong algal blooms being observed thereafter. Using model scenarios, we further disentangled the roles of WLC and nutrient loading, showing that the 1963 shift was predominantly triggered by WLC, whereas the shift ca. 1980 was attributed to aggravated nutrient loading. Our analysis also shows interactions between these two stressors. Compared to the dynamics driven by nutrient loading alone, WLC reduced the critical P loading and resulted in earlier disappearance of submerged vegetation and emergence of algal blooms by approximately 26 and 10years, respectively. Overall, our study reveals the significant role of hydrological regulation in driving shallow lake ecosystem dynamics, and it highlights the urgency of using multi-objective management criteria that includes ecological sustainability perspectives when implementing hydrological regulation for aquatic ecosystems around the globe.; National Science Foundation of China (NSFC) [41030529, 41271462]; Major Science and Technology Program for Water Pollution Control and Treatment, Chaohu [2012ZX07103002]; National Foundation for Distinguished Young Scholars [40725004]; China-Netherlands Joint Scientific Thematic Research Program (JSTP) of the Netherlands Organization for Scientific Research (NWO) [842.00.009]; Netherlands Foundation for Applied Water Research (STOWA) [443237]; China Scholarship Council; 111 Project [B14001]; SCI(E); PubMed; ARTICLE; 2; 737-754; 23
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/493521]
专题	城市与环境学院工学院
推荐引用方式 GB/T 7714	Kong, Xiangzhen,He, Qishuang,Yang, Bin,et al. Hydrological regulation drives regime shifts: evidence from paleolimnology and ecosystem modeling of a large shallow Chinese lake[J]. GLOBAL CHANGE BIOLOGY,2017.
APA	Kong, Xiangzhen.,He, Qishuang.,Yang, Bin.,He, Wei.,Xu, Fuliu.,...&Mooij, Wolf M..(2017).Hydrological regulation drives regime shifts: evidence from paleolimnology and ecosystem modeling of a large shallow Chinese lake.GLOBAL CHANGE BIOLOGY.
MLA	Kong, Xiangzhen,et al."Hydrological regulation drives regime shifts: evidence from paleolimnology and ecosystem modeling of a large shallow Chinese lake".GLOBAL CHANGE BIOLOGY (2017).