Responses of the ocean planktonic ecosystem to finite-amplitude perturbations

doi:10.1002/2014JC010339

IOCAS-IR > 海洋环流与波动重点实验室

	Responses of the ocean planktonic ecosystem to finite-amplitude perturbations
	Wang, Qiang; Mu, Mu; Mu, M (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China.
	2014-12-01
发表期刊	JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
卷号	119 期号:12 页码:8454-8471
文章类型	Article
摘要	The responses of the ocean planktonic ecosystem to finite-amplitude perturbations are investigated using an ocean planktonic ecosystem model. Through changing the higher predation rate on zooplankton, multiple equilibria of the model, namely high-nutrient and low-nutrient states, are obtained under certain parameter values. Based on these states, the perturbations with maximum nonlinear growth are determined using the conditional nonlinear optimal perturbation (CNOP) method. The linear and nonlinear evolutions of the CNOP perturbation are compared. The results show that the nonlinear evolution of the perturbation leads to predator-prey oscillations with larger amplitude than the linear evolution. Besides, after the perturbation amplitude exceeds a critical value, the nonlinear evolution of the perturbation will induce the linearly stable ecosystem state to lose the stability and become nonlinearly unstable. This implies that nonlinear processes have important impacts on the stability of the ecosystem. Specifically, we identify the nonlinear processes related to zooplankton grazing to impact the stability most for the high-nutrient state, while for the low-nutrient state the main nonlinear process affecting the stability is the uptake process. These results help to improve our understanding of the sensitivity of the oceanic ecosystem model to finite-amplitude perturbations and the underlying nonlinear stability properties.
关键词	Ocean Planktonic Ecosystem Nonlinearity Stability Finite-amplitude Perturbation
学科领域	Oceanography
DOI	10.1002/2014JC010339
收录类别	SCI
语种	英语
WOS记录号	WOS:000348452800015
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/23959
专题	海洋环流与波动重点实验室
通讯作者	Mu, M (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China.
作者单位	Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China
第一作者单位	海洋环流与波动重点实验室
推荐引用方式 GB/T 7714	Wang, Qiang,Mu, Mu,Mu, M . Responses of the ocean planktonic ecosystem to finite-amplitude perturbations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,2014,119(12):8454-8471.
APA	Wang, Qiang,Mu, Mu,&Mu, M .(2014).Responses of the ocean planktonic ecosystem to finite-amplitude perturbations.JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS,119(12),8454-8471.
MLA	Wang, Qiang,et al."Responses of the ocean planktonic ecosystem to finite-amplitude perturbations".JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS 119.12(2014):8454-8471.

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