Relation Between Population Density and Body Size in Stream Communities-Reference-Cited by-同舟云学术

Relation Between Population Density and Body Size in Stream Communities

Published:2000-09 Issue:5484 Volume:289 Page:1557-1560
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Schmid P. E.¹,Tokeshi M.²,Schmid-Araya J. M.¹

Affiliation:

1. School of Biological Sciences, Queen Mary & Westfield College, University of London, London E1 4NS, UK.

2. Amakusa Marine Biological Laboratory, Kyushu University, Tomioka, Reihoku-Amakusa, Kumamoto, Japan.

Abstract

The existence of a general relation between population density and body size in animal assemblages has been debated because of known biases and ambiguities in the published data and data handling. Using new comprehensive data sets from two geographically separated stream communities that encompass 448 and 260 invertebrate taxa with a wide range of body sizes, we show that an inverse proportionality between density and body size is a consistent feature in these communities. The scaling across taxa is not statistically different between the two systems, indicating a convergent pattern of communities. Variation in the regression slope among different taxonomic groups indicates that these communities are not governed universally by a single ecological or energetic rule.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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3. Because individual metabolic rates ( R ) scale with body mass according to R ∝ W 0.75 (31) β ≈ –0.75 in density–body size relation has been taken as evidence that population density is constrained by energy requirements (1) and that an approximately equal amount of energy is available to each species in a community (24).

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5. Size, Abundance, and Energy Use in Communities

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