The Dynamics of Phenotypic Change and the Shrinking Sheep of St. Kilda

被引：254

作者：

Ozgul, Arpat ^{[1
]}

Tuljapurkar, Shripad ^{[2
]}

Benton, Tim G. ^{[3
]}

Pemberton, Josephine M. ^{[4
]}

Clutton-Brock, Tim H. ^{[5
]}

Coulson, Tim ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Life Sci, Ascot SL5 7PY, Berks, England

[2] Stanford Univ, Dept Biol, Stanford, CA 94305 USA

[3] Univ Leeds, Fac Biol Sci, Leeds LS2 9JT, W Yorkshire, England

[4] Univ Edinburgh, Inst Evolutionary Biol, Edinburgh EH9 3JT, Midlothian, Scotland

[5] Univ Cambridge, Dept Zool, Cambridge CB2 3EJ, England

来源：

SCIENCE | 2009年 / 325卷 / 5939期

基金：

英国自然环境研究理事会;

关键词：

CLIMATE-CHANGE; BODY-SIZE; QUANTITATIVE TRAIT; NATURAL-SELECTION; RAPID EVOLUTION; POPULATION; ENVIRONMENT; RESPONSES; GROWTH; TRENDS;

D O I：

10.1126/science.1173668

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Environmental change, including climate change, can cause rapid phenotypic change via both ecological and evolutionary processes. Because ecological and evolutionary dynamics are intimately linked, a major challenge is to identify their relative roles. We exactly decomposed the change in mean body weight in a free-living population of Soay sheep into all the processes that contribute to change. Ecological processes contribute most, with selection-the underpinning of adaptive evolution-explaining little of the observed phenotypic trend. Our results enable us to explain why selection has so little effect even though weight is heritable, and why environmental change has caused a decline in the body size of Soay sheep.

引用

页码：464 / 467

页数：4

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