Size dependence of biomass spectra and abundance spectra: the optimal distributions

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	Size dependence of biomass spectra and abundance spectra: the optimal distributions
	Han, BP ; Straskraba, M
刊名	ECOLOGICAL MODELLING
	2001-11-15
卷号	145 期号:2-3 页码:175-187
关键词	Size Spectra Optimal Distribution Biomass Abundance
ISSN号	0304-3800
文献子类	Article
英文摘要	Based on the hypothesis of self-optimization, we derive four models of biomass spectra and abundance spectra in communities with size-dependent metabolic rates. In Models 1 and 2, the maximum diversity of population abundance in different size classes subject to the constraints of constant mean body mass and constant mean respiration rate is assumed to be the strategy for ecosystems to organize their size structure. In Models 3 and 4, the organizing strategy is defined as the maximum diversity of biomass in different size classes without constraints on mean body mass and subject to the constant mean specific respiration rate of all individuals, i.e. the average specific respiration rate over all individuals of a community or group, which characterizes the mean rate of energy consumption in a community. Models 1 and 2 generate peaked distributions of biomass spectral density whereas Model 3 generates a fiat distribution. In Model 4, the distributions of biomass spectral density and of abundance spectral density depend on the Lagrangian multipler (lambda (2)). When lambda (2) tends to zero or equals zero, the distributions of biomass spectral density and of abundance spectral density correspond to those from Model 3. When lambda (2) has a large negative value, the biomass spectrum is similar to the empirical fiat biomass spectrum organized in logarithmic size intervals. When lambda (2) > 0, the biomass spectral density increases with body mass and the distribution of abundance spectral density is an unimodal curve. (C) 2001 Elsevier Science B.V. All rights reserved.; Based on the hypothesis of self-optimization, we derive four models of biomass spectra and abundance spectra in communities with size-dependent metabolic rates. In Models 1 and 2, the maximum diversity of population abundance in different size classes subject to the constraints of constant mean body mass and constant mean respiration rate is assumed to be the strategy for ecosystems to organize their size structure. In Models 3 and 4, the organizing strategy is defined as the maximum diversity of biomass in different size classes without constraints on mean body mass and subject to the constant mean specific respiration rate of all individuals, i.e. the average specific respiration rate over all individuals of a community or group, which characterizes the mean rate of energy consumption in a community. Models 1 and 2 generate peaked distributions of biomass spectral density whereas Model 3 generates a fiat distribution. In Model 4, the distributions of biomass spectral density and of abundance spectral density depend on the Lagrangian multipler (lambda (2)). When lambda (2) tends to zero or equals zero, the distributions of biomass spectral density and of abundance spectral density correspond to those from Model 3. When lambda (2) has a large negative value, the biomass spectrum is similar to the empirical fiat biomass spectrum organized in logarithmic size intervals. When lambda (2) > 0, the biomass spectral density increases with body mass and the distribution of abundance spectral density is an unimodal curve. (C) 2001 Elsevier Science B.V. All rights reserved.
学科主题	Ecology
语种	英语
WOS记录号	WOS:000172668200007
公开日期	2010-12-22
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/2831]
专题	海洋研究所_海洋生态与环境科学重点实验室
作者单位	1.Jinan Univ, Inst Hydrobiol, Guangzhou 510632, Peoples R China 2.Chinese Acad Sci, Inst Oceanog, Qingdao 266071, Peoples R China 3.Acad Sci Czech Republic, Biomath Lab, CR-37005 Ceske Budejovice, Czech Republic 4.Univ S Bohemia, Fac Biol Sci, CR-37005 Ceske Budejovice, Czech Republic
推荐引用方式 GB/T 7714	Han, BP,Straskraba, M. Size dependence of biomass spectra and abundance spectra: the optimal distributions[J]. ECOLOGICAL MODELLING,2001,145(2-3):175-187.
APA	Han, BP,&Straskraba, M.(2001).Size dependence of biomass spectra and abundance spectra: the optimal distributions.ECOLOGICAL MODELLING,145(2-3),175-187.
MLA	Han, BP,et al."Size dependence of biomass spectra and abundance spectra: the optimal distributions".ECOLOGICAL MODELLING 145.2-3(2001):175-187.