globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13416
论文题名:
Hydrological regulation drives regime shifts: evidence from paleolimnology and ecosystem modeling of a large shallow Chinese lake
作者: Kong X.; He Q.; Yang B.; He W.; Xu F.; Janssen A.B.G.; Kuiper J.J.; van Gerven L.P.A.; Qin N.; Jiang Y.; Liu W.; Yang C.; Bai Z.; Zhang M.; Kong F.; Janse J.H.; Mooij W.M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:2
起始页码: 737
结束页码: 754
语种: 英语
英文关键词: Lake Chaohu ; nutrient loading ; paleolimnology ; PCLake ; regime shift ; water level control
Scopus关键词: algae
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 10 years, 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. © 2016 John Wiley & Sons Ltd
资助项目: Funding for this study was provided by the National Science Foundation of China (NSFC ; 41030529, 41271462), the Major Science and Technology Program for Water Pollution Control and Treatment, Chaohu (2012ZX07103002) and the National Foundation for Distinguished Young Scholars (40725004). A.B.G. Janssen is funded by the China–Netherlands Joint Scientific Thematic Research Program (JSTP) of the Netherlands Organization for Scientific Research (NWO) project no. 842.00.009. J.J. Kuiper and L.P.A. van Gerven were financed by the Netherlands Foundation for Applied Water Research (STOWA) project no. 443237. This work is also supported by a grant from the China Scholarship Council and from the 111 Project (B14001). This is publication 6111 of the Netherlands Institute of Ecology (NIOO-KNAW). The authors declare no conflict of interest.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61061
Appears in Collections:影响、适应和脆弱性

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作者单位: MOE Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing, China; Department of Aquatic Ecology, Netherlands Institute of Ecology (NIOO-KNAW), P.O. Box 50, Wageningen, Netherlands; Institute of Water Sciences, Peking University, Beijing, China; Department of Aquatic Ecology and Water Quality Management, Wageningen University, P.O. Box 47, Wageningen, Netherlands; State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, 73 East Beijing Road, Nanjing, China; PBL Netherlands Environmental Assessment Agency, P.O. Box 303, Bilthoven, Netherlands

Recommended Citation:
Kong X.,He Q.,Yang B.,et al. Hydrological regulation drives regime shifts: evidence from paleolimnology and ecosystem modeling of a large shallow Chinese lake[J]. Global Change Biology,2017-01-01,23(2)
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