Display Settings:

Format

Send to:

Choose Destination
See comment in PubMed Commons below
Science. 2001 May 25;292(5521):1528-31.

Age, sex, density, winter weather, and population crashes in Soay sheep.

Author information

  • 1Institute of Zoology, Zoological Society of London, Regent's Park, London NW1 4RY, UK. tnc20@cam.ac.uk

Abstract

Quantifying the impact of density, extrinsic climatic fluctuations, and demography on population fluctuations is a persistent challenge in ecology. We analyzed the effect of these processes on the irregular pattern of population crashes of Soay sheep on the St. Kilda archipelago, United Kingdom. Because the age and sex structure of the population fluctuates independently of population size, and because animals of different age and sex respond in different ways to density and weather, identical weather conditions can result in different dynamics in populations of equal size. In addition, the strength of density-dependent processes is a function of the distribution of weather events. Incorporating demographic heterogeneities into population models can influence dynamics and their response to climate change.

Comment in

PMID:
11375487
[PubMed - indexed for MEDLINE]
Free full text
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Icon for HighWire
    Loading ...
    Write to the Help Desk