气候变化领域集成服务门户(CCPortal): Metabolism drives demography in an experimental field test

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DOI	10.1073/pnas.2104942118
	Metabolism drives demography in an experimental field test
	Schuster L.; Cameron H.; White C.R.; Marshall D.J.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:34
英文摘要	Metabolism should drive demography by determining the rates of both biological work and resource demand. Long-standing “rules” for how metabolism should covary with demography permeate biology, from predicting the impacts of climate change to managing fisheries. Evidence for these rules is almost exclusively indirect and in the form of among-species comparisons, while direct evidence is exceptionally rare. In a manipulative field experiment on a sessile marine invertebrate, we created experimental populations that varied in population size (density) and metabolic rate, but not body size. We then tested key theoretical predictions regarding relationships between metabolism and demography by parameterizing population models with lifetime performance data from our field experiment. We found that populations with higher metabolisms had greater intrinsic rates of increase and lower carrying capacities, in qualitative accordance with classic theory. We also found important departures from theory—in particular, carrying capacity declined less steeply than predicted, such that energy use at equilibrium increased with metabolic rate, violating the longstanding axiom of energy equivalence. Theory holds that energy equivalence emerges because resource supply is assumed to be independent of metabolic rate. We find this assumption to be violated under real-world conditions, with potentially far-reaching consequences for the management of biological systems. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Competition; Damuth’s law; Energy equivalence; Increased intake hypothesis; Metabolic theory
语种	英语
scopus关键词	article; biology; body size; competition; controlled study; demography; field experiment; human; marine invertebrate; metabolic rate; nonhuman; population size; prediction; theoretical study
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238660
作者单位	Centre for Geometric Biology, School of Biological Sciences, Monash University, Melbourne, VIC 3800, Australia
推荐引用方式 GB/T 7714	Schuster L.,Cameron H.,White C.R.,et al. Metabolism drives demography in an experimental field test[J],2021,118(34).
APA	Schuster L.,Cameron H.,White C.R.,&Marshall D.J..(2021).Metabolism drives demography in an experimental field test.Proceedings of the National Academy of Sciences of the United States of America,118(34).
MLA	Schuster L.,et al."Metabolism drives demography in an experimental field test".Proceedings of the National Academy of Sciences of the United States of America 118.34(2021).