Pervasive influence of large-scale climate in the dynamics of a terrestrial vertebrate community

Eric Post, Mads C. Forchhammer

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Background: Large-scale climatic variability has been implicated in the population dynamics of many vertebrates throughout the Northern Hemisphere, but has not been demonstrated to directly influence dynamics at multiple trophic levels of any single system. Using data from Isle Royale, USA, comprising time series on the long-term dynamics at three trophic levels (wolves, moose, and balsam fir), we analyzed the relative contributions of density dependence, inter-specific interactions, and climate to the dynamics of each level of the community. Results: Despite differences in dynamic complexity among the predator, herbivore, and vegetation levels, large-scale climatic variability influenced dynamics directly at all three levels. The strength of the climatic influence on dynamics was, however, strongest at the top and bottom trophic levels, where density dependence was weakest. Conclusions: Because of the conflicting influences of environmental variability and intrinsic processes on population stability, a direct influence of climate on the dynamics at all three levels suggests that climate change may alter stability of this community. Theoretical considerations suggest that if it does, such alteration is most likely to result from changes in stability at the top or bottom trophic levels, where the influence of climate was strongest.

Original languageEnglish (US)
Article number5
JournalBMC Ecology
Volume1
DOIs
StatePublished - Dec 6 2001

Fingerprint

Climate
trophic level
Vertebrates
vertebrate
vertebrates
climate
density dependence
Abies
Specific Gravity
Herbivory
Climate Change
Population Dynamics
interspecific interaction
herbivore
Northern Hemisphere
population dynamics
predator
time series
Abies balsamea
Alces alces

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Environmental Science(all)

Cite this

@article{3e6250e5fa3a480aa673e86310158670,
title = "Pervasive influence of large-scale climate in the dynamics of a terrestrial vertebrate community",
abstract = "Background: Large-scale climatic variability has been implicated in the population dynamics of many vertebrates throughout the Northern Hemisphere, but has not been demonstrated to directly influence dynamics at multiple trophic levels of any single system. Using data from Isle Royale, USA, comprising time series on the long-term dynamics at three trophic levels (wolves, moose, and balsam fir), we analyzed the relative contributions of density dependence, inter-specific interactions, and climate to the dynamics of each level of the community. Results: Despite differences in dynamic complexity among the predator, herbivore, and vegetation levels, large-scale climatic variability influenced dynamics directly at all three levels. The strength of the climatic influence on dynamics was, however, strongest at the top and bottom trophic levels, where density dependence was weakest. Conclusions: Because of the conflicting influences of environmental variability and intrinsic processes on population stability, a direct influence of climate on the dynamics at all three levels suggests that climate change may alter stability of this community. Theoretical considerations suggest that if it does, such alteration is most likely to result from changes in stability at the top or bottom trophic levels, where the influence of climate was strongest.",
author = "Eric Post and Forchhammer, {Mads C.}",
year = "2001",
month = "12",
day = "6",
doi = "10.1186/1472-6785-1-5",
language = "English (US)",
volume = "1",
journal = "BMC Ecology",
issn = "1472-6785",
publisher = "BioMed Central",

}

Pervasive influence of large-scale climate in the dynamics of a terrestrial vertebrate community. / Post, Eric; Forchhammer, Mads C.

In: BMC Ecology, Vol. 1, 5, 06.12.2001.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Pervasive influence of large-scale climate in the dynamics of a terrestrial vertebrate community

AU - Post, Eric

AU - Forchhammer, Mads C.

PY - 2001/12/6

Y1 - 2001/12/6

N2 - Background: Large-scale climatic variability has been implicated in the population dynamics of many vertebrates throughout the Northern Hemisphere, but has not been demonstrated to directly influence dynamics at multiple trophic levels of any single system. Using data from Isle Royale, USA, comprising time series on the long-term dynamics at three trophic levels (wolves, moose, and balsam fir), we analyzed the relative contributions of density dependence, inter-specific interactions, and climate to the dynamics of each level of the community. Results: Despite differences in dynamic complexity among the predator, herbivore, and vegetation levels, large-scale climatic variability influenced dynamics directly at all three levels. The strength of the climatic influence on dynamics was, however, strongest at the top and bottom trophic levels, where density dependence was weakest. Conclusions: Because of the conflicting influences of environmental variability and intrinsic processes on population stability, a direct influence of climate on the dynamics at all three levels suggests that climate change may alter stability of this community. Theoretical considerations suggest that if it does, such alteration is most likely to result from changes in stability at the top or bottom trophic levels, where the influence of climate was strongest.

AB - Background: Large-scale climatic variability has been implicated in the population dynamics of many vertebrates throughout the Northern Hemisphere, but has not been demonstrated to directly influence dynamics at multiple trophic levels of any single system. Using data from Isle Royale, USA, comprising time series on the long-term dynamics at three trophic levels (wolves, moose, and balsam fir), we analyzed the relative contributions of density dependence, inter-specific interactions, and climate to the dynamics of each level of the community. Results: Despite differences in dynamic complexity among the predator, herbivore, and vegetation levels, large-scale climatic variability influenced dynamics directly at all three levels. The strength of the climatic influence on dynamics was, however, strongest at the top and bottom trophic levels, where density dependence was weakest. Conclusions: Because of the conflicting influences of environmental variability and intrinsic processes on population stability, a direct influence of climate on the dynamics at all three levels suggests that climate change may alter stability of this community. Theoretical considerations suggest that if it does, such alteration is most likely to result from changes in stability at the top or bottom trophic levels, where the influence of climate was strongest.

UR - http://www.scopus.com/inward/record.url?scp=0002980133&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0002980133&partnerID=8YFLogxK

U2 - 10.1186/1472-6785-1-5

DO - 10.1186/1472-6785-1-5

M3 - Article

C2 - 11782292

AN - SCOPUS:0002980133

VL - 1

JO - BMC Ecology

JF - BMC Ecology

SN - 1472-6785

M1 - 5

ER -