Internal cycling, not external loading, decides the nutrient limitation   in eutrophic lake: A dynamic model with temporal Bayesian hierarchical   inference

doi:10.1016/j.watres.2017.03.039

CORC > 北京大学 > 环境科学与工程学院

	Internal cycling, not external loading, decides the nutrient limitation in eutrophic lake: A dynamic model with temporal Bayesian hierarchical inference
	Wu, Zhen ; Liu, Yong ; Liang, Zhongyao ; Wu, Sifeng ; Guo, Huaicheng
刊名	WATER RESEARCH
	2017
关键词	Internal cycling Nutrient limitation Bayesian hierarchical inference Sediment change Lake Dianchi ATMOSPHERIC NITROGEN DEPOSITION AQUATIC BIOGEOCHEMICAL MODELS DEEP OLIGOTROPHIC LAKE ENVIRONMENTAL SCIENCE NORTHERN-HEMISPHERE ORGANIC-MATTER CHESAPEAKE BAY SHALLOW LAKE PHOSPHORUS CHINA
DOI	10.1016/j.watres.2017.03.039
英文摘要	Lake eutrophication is associated with excessive anthropogenic nutrients (mainly nitrogen (N) and phosphorus (P)) and unobserved internal nutrient cycling. Despite the advances in understanding the role of external loadings, the contribution of internal nutrient cycling is still an open question. A dynamic mass-balance model was developed to simulate and measure the contributions of internal cycling and external loading. It was based on the temporal Bayesian Hierarchical Framework (BHM), where we explored the seasonal patterns in the dynamics of nutrient cycling processes and the limitation of N and P on phytoplankton growth in hyper-eutrophic Lake Dianchi, China. The dynamic patterns of the five state variables (Chla, TP, ammonia, nitrate and organic N) were simulated based on the model. Five parameters (algae growth rate, sediment exchange rate of N and P, nitrification rate and denitrification rate) were estimated based on BHM. The model provided a good fit to observations. Our model results highlighted the role of internal cycling of N and P in Lake Dianchi. The internal cycling processes contributed more than external loading to the N and P changes in the water column. Further insights into the nutrient limitation analysis indicated that the sediment exchange of P determined the P limitation. Allowing for the contribution of denitrification to N removal, N was the more limiting nutrient in most of the time, however, P was the more important nutrient for eutrophication management. For Lake Dianchi, it would not be possible to recover solely by reducing the external watershed nutrient load; the mechanisms of internal cycling should also be considered as an approach to inhibit the release of sediments and to enhance denitrification. (C) 2017 Elsevier Ltd. All rights reserved.; National Basic Research Program of China [2015CB458900]; Collaborative Innovation Center for Regional Environmental Quality; SCI(E); ARTICLE; 231-240; 116
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/473245]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Wu, Zhen,Liu, Yong,Liang, Zhongyao,et al. Internal cycling, not external loading, decides the nutrient limitation in eutrophic lake: A dynamic model with temporal Bayesian hierarchical inference[J]. WATER RESEARCH,2017.
APA	Wu, Zhen,Liu, Yong,Liang, Zhongyao,Wu, Sifeng,&Guo, Huaicheng.(2017).Internal cycling, not external loading, decides the nutrient limitation in eutrophic lake: A dynamic model with temporal Bayesian hierarchical inference.WATER RESEARCH.
MLA	Wu, Zhen,et al."Internal cycling, not external loading, decides the nutrient limitation in eutrophic lake: A dynamic model with temporal Bayesian hierarchical inference".WATER RESEARCH (2017).