Effects of temperature on the threshold of phosphorus for algal blooms

CORC > 力学研究所 > 中国科学院力学研究所 > 力学所知识产出(1956-2008)

	Effects of temperature on the threshold of phosphorus for algal blooms
	Yuan T(袁涛); Li JC(李家春); Zhou JF(周济福); Yuan T
	2007
会议名称	5th International Conference on Fluid Mechanics
会议日期	AUG 15-19, 2007
会议地点	Shanghai, PEOPLES R CHINA
关键词	Model
页码	646-646
通讯作者	Yuan T
中文摘要	Algal blooms, worsening marine ecosystems and causing great economic loss, have been paid much attention to for a long time. Such environmental factors as light penetration, water temperature, and nutrient concentration are crucial in blooms processes. Among them, only nutrients can be controlled. Therefore, the threshold of nutrients for algal blooms is of great concern. To begin with, a dynamic eutrophication model has been constructed to simulate the algal growth and phosphorus cycling. The model encapsulates the essential biological processes of algal growth and decay, and phosphorus regeneration due to algal decay. The nutrient limitation is based upon commonly used Monod's kinetics. The effects of temperature and phosphorus limitation are particularly addressed. Then, we have endeavored to elucidate the threshold of phosphorus at different temperature for algal blooms. Based on the numerical simulation, the isoquant contours of change rate of alga as shown in the figure are obtained, which obviously demonstrate the threshold of nutrient at an arbitrary reasonable temperature. The larger the change rate is, the more rapidly the alga grows. If the phosphorus concentration at a given temperature remains larger than the threshold the algal biomass may increase monotonically, leading to the algal blooming. With the rising of temperature, the threshold is apparently reduced, which may explain why likely red tide disasters occur in a fine summer day. So, high temperature and sufficient phosphorus supply are the major factors which result in algal growth and blowout of red tide.
收录类别	CPCI-S
会议录	New Trends In Fluid Mechanics Research - Proceedings Of The Fifth International Conference On Fluid Mechanics
会议录出版者	Beijing
会议录出版地	Tsinghua University Press
语种	英语
ISSN号	978-7-302-15894-3
WOS记录号	WOS:000254042000217
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/25470]
专题	力学研究所_力学所知识产出(1956-2008)
通讯作者	Yuan T
推荐引用方式 GB/T 7714	Yuan T,Li JC,Zhou JF,et al. Effects of temperature on the threshold of phosphorus for algal blooms[C]. 见:5th International Conference on Fluid Mechanics. Shanghai, PEOPLES R CHINA. AUG 15-19, 2007.