Climate and density-dependent population dynamics: Lessons from a simple high-Arctic ecosystem
The strikingly diverse population dynamics of herbivorous small mammals, ranging from high-amplitude, multi-annual cycles to relatively stable dynamics, have puzzled ecologists for a century. Theory predicts that this diversity is shaped by density-dependent food web interactions and stochastic weat...
Main Authors: | , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
Authorea, Inc.
2021
|
Subjects: | |
Online Access: | http://dx.doi.org/10.22541/au.161217767.76827108/v1 |
id |
crwinnower:10.22541/au.161217767.76827108/v1 |
---|---|
record_format |
openpolar |
spelling |
crwinnower:10.22541/au.161217767.76827108/v1 2024-06-02T08:01:32+00:00 Climate and density-dependent population dynamics: Lessons from a simple high-Arctic ecosystem Fauteux, Dominique Stien, Audun Yoccoz, Nigel Fuglei, Eva Ims, Rolf 2021 http://dx.doi.org/10.22541/au.161217767.76827108/v1 unknown Authorea, Inc. posted-content 2021 crwinnower https://doi.org/10.22541/au.161217767.76827108/v1 2024-05-07T14:19:20Z The strikingly diverse population dynamics of herbivorous small mammals, ranging from high-amplitude, multi-annual cycles to relatively stable dynamics, have puzzled ecologists for a century. Theory predicts that this diversity is shaped by density-dependent food web interactions and stochastic weather events. Recent disrupted cycles through amplitude dampening have been attributed to climate change. However, empirical testing has been hampered by the complexity of the food webs in which these herbivores normally are found. Here we analyze population dynamics of a grazing vole species in a uniquely simple high-Arctic food web without top-down regulation. In accordance with theory, the population dynamics was mostly ruled by overcompensatory density-dependence in winter that without environmental stochasticity would have yielded seasonality driven high-amplitude 2-year cycles. In this simple food web, rain-on-snow events disrupted cyclicity, but not through amplitude dampening. Our case study highlights how food web structure may modify the impact of climate change on population dynamics. Other/Unknown Material Arctic Climate change The Winnower Arctic |
institution |
Open Polar |
collection |
The Winnower |
op_collection_id |
crwinnower |
language |
unknown |
description |
The strikingly diverse population dynamics of herbivorous small mammals, ranging from high-amplitude, multi-annual cycles to relatively stable dynamics, have puzzled ecologists for a century. Theory predicts that this diversity is shaped by density-dependent food web interactions and stochastic weather events. Recent disrupted cycles through amplitude dampening have been attributed to climate change. However, empirical testing has been hampered by the complexity of the food webs in which these herbivores normally are found. Here we analyze population dynamics of a grazing vole species in a uniquely simple high-Arctic food web without top-down regulation. In accordance with theory, the population dynamics was mostly ruled by overcompensatory density-dependence in winter that without environmental stochasticity would have yielded seasonality driven high-amplitude 2-year cycles. In this simple food web, rain-on-snow events disrupted cyclicity, but not through amplitude dampening. Our case study highlights how food web structure may modify the impact of climate change on population dynamics. |
format |
Other/Unknown Material |
author |
Fauteux, Dominique Stien, Audun Yoccoz, Nigel Fuglei, Eva Ims, Rolf |
spellingShingle |
Fauteux, Dominique Stien, Audun Yoccoz, Nigel Fuglei, Eva Ims, Rolf Climate and density-dependent population dynamics: Lessons from a simple high-Arctic ecosystem |
author_facet |
Fauteux, Dominique Stien, Audun Yoccoz, Nigel Fuglei, Eva Ims, Rolf |
author_sort |
Fauteux, Dominique |
title |
Climate and density-dependent population dynamics: Lessons from a simple high-Arctic ecosystem |
title_short |
Climate and density-dependent population dynamics: Lessons from a simple high-Arctic ecosystem |
title_full |
Climate and density-dependent population dynamics: Lessons from a simple high-Arctic ecosystem |
title_fullStr |
Climate and density-dependent population dynamics: Lessons from a simple high-Arctic ecosystem |
title_full_unstemmed |
Climate and density-dependent population dynamics: Lessons from a simple high-Arctic ecosystem |
title_sort |
climate and density-dependent population dynamics: lessons from a simple high-arctic ecosystem |
publisher |
Authorea, Inc. |
publishDate |
2021 |
url |
http://dx.doi.org/10.22541/au.161217767.76827108/v1 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_doi |
https://doi.org/10.22541/au.161217767.76827108/v1 |
_version_ |
1800745930062823424 |