The role of indirect interspecific effects in the stochastic dynamics of a simple trophic system
Understanding indirect interspecific effects (IIEs) on population dynamics is key for predicting community dynamics. Yet, empirically teasing apart IIEs from other interactions and population drivers is data-demanding. We used stochastic population models parameterized with long-term vital rate time...
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2024
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Online Access: | http://dx.doi.org/10.22541/au.171164869.95631622/v1 |
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crwinnower:10.22541/au.171164869.95631622/v1 2024-06-02T08:00:10+00:00 The role of indirect interspecific effects in the stochastic dynamics of a simple trophic system Bartra-Cabré, Laura Hansen, Brage Lee, Aline Magdalena Layton-Matthews, Kate Loonen, Maarten Fuglei, Eva Loe, Leif Grøtan, Vidar 2024 http://dx.doi.org/10.22541/au.171164869.95631622/v1 unknown Authorea, Inc. posted-content 2024 crwinnower https://doi.org/10.22541/au.171164869.95631622/v1 2024-05-07T14:19:24Z Understanding indirect interspecific effects (IIEs) on population dynamics is key for predicting community dynamics. Yet, empirically teasing apart IIEs from other interactions and population drivers is data-demanding. We used stochastic population models parameterized with long-term vital rate time series to simulate population trajectories and examine IIEs in a high-arctic vertebrate trophic chain: Svalbard reindeer, its scavenger (Arctic fox), and a migratory fox prey (barnacle goose). Reindeer carcass supply shaped fox abundance fluctuations, subsequently affecting goose fluctuations. Yet reindeer and goose population growth rates were only weakly correlated, probably due to stochasticity, density dependence and life history traits. However, by isolating the effects of individual processes within our simulation model, we demonstrate the presence of strong IIEs on goose population fluctuations and extinction probability. Thus, we highlight the long-term impact of species interactions, including IIEs, on species coexistence and communities, beyond immediate effects and short-term fluctuations. Other/Unknown Material Arctic Fox Arctic Barnacle goose Svalbard svalbard reindeer The Winnower Arctic Svalbard |
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The Winnower |
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crwinnower |
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description |
Understanding indirect interspecific effects (IIEs) on population dynamics is key for predicting community dynamics. Yet, empirically teasing apart IIEs from other interactions and population drivers is data-demanding. We used stochastic population models parameterized with long-term vital rate time series to simulate population trajectories and examine IIEs in a high-arctic vertebrate trophic chain: Svalbard reindeer, its scavenger (Arctic fox), and a migratory fox prey (barnacle goose). Reindeer carcass supply shaped fox abundance fluctuations, subsequently affecting goose fluctuations. Yet reindeer and goose population growth rates were only weakly correlated, probably due to stochasticity, density dependence and life history traits. However, by isolating the effects of individual processes within our simulation model, we demonstrate the presence of strong IIEs on goose population fluctuations and extinction probability. Thus, we highlight the long-term impact of species interactions, including IIEs, on species coexistence and communities, beyond immediate effects and short-term fluctuations. |
format |
Other/Unknown Material |
author |
Bartra-Cabré, Laura Hansen, Brage Lee, Aline Magdalena Layton-Matthews, Kate Loonen, Maarten Fuglei, Eva Loe, Leif Grøtan, Vidar |
spellingShingle |
Bartra-Cabré, Laura Hansen, Brage Lee, Aline Magdalena Layton-Matthews, Kate Loonen, Maarten Fuglei, Eva Loe, Leif Grøtan, Vidar The role of indirect interspecific effects in the stochastic dynamics of a simple trophic system |
author_facet |
Bartra-Cabré, Laura Hansen, Brage Lee, Aline Magdalena Layton-Matthews, Kate Loonen, Maarten Fuglei, Eva Loe, Leif Grøtan, Vidar |
author_sort |
Bartra-Cabré, Laura |
title |
The role of indirect interspecific effects in the stochastic dynamics of a simple trophic system |
title_short |
The role of indirect interspecific effects in the stochastic dynamics of a simple trophic system |
title_full |
The role of indirect interspecific effects in the stochastic dynamics of a simple trophic system |
title_fullStr |
The role of indirect interspecific effects in the stochastic dynamics of a simple trophic system |
title_full_unstemmed |
The role of indirect interspecific effects in the stochastic dynamics of a simple trophic system |
title_sort |
role of indirect interspecific effects in the stochastic dynamics of a simple trophic system |
publisher |
Authorea, Inc. |
publishDate |
2024 |
url |
http://dx.doi.org/10.22541/au.171164869.95631622/v1 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Fox Arctic Barnacle goose Svalbard svalbard reindeer |
genre_facet |
Arctic Fox Arctic Barnacle goose Svalbard svalbard reindeer |
op_doi |
https://doi.org/10.22541/au.171164869.95631622/v1 |
_version_ |
1800744172209045504 |