Data from: The fluctuating world of a tundra predator guild: bottom-up constraints overrule top-down species interactions in winter
Global warming is predicted to change ecosystem functioning and structure in Arctic ecosystems by strengthening top-down species interactions, i.e. predation pressure on small herbivores and interference between predators. Yet, previous research is biased towards the summer season. Due to greater ab...
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ftdans:oai:easy.dans.knaw.nl:easy-dataset:112374 2023-07-02T03:30:56+02:00 Data from: The fluctuating world of a tundra predator guild: bottom-up constraints overrule top-down species interactions in winter Stoessel, Marianne Elmhagen, Bodil Vinka, Mikael Hellström, Peter Angerbjörn, Anders 2018-09-07T16:22:51.000+02:00 http://nbn-resolving.org/urn:nbn:nl:ui:13-lz-p7jp https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:112374 unknown doi:10.5061/dryad.rk64m4c/1 doi:10.1111/ecog.03984 http://nbn-resolving.org/urn:nbn:nl:ui:13-lz-p7jp doi:10.5061/dryad.rk64m4c https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:112374 OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf Life sciences medicine and health care 2018 ftdans https://doi.org/10.5061/dryad.rk64m4c/110.1111/ecog.0398410.5061/dryad.rk64m4c 2023-06-13T13:01:19Z Global warming is predicted to change ecosystem functioning and structure in Arctic ecosystems by strengthening top-down species interactions, i.e. predation pressure on small herbivores and interference between predators. Yet, previous research is biased towards the summer season. Due to greater abiotic constraints, Arctic ecosystem characteristics might be more pronounced in winter. Here we test the hypothesis that top-down species interactions prevail over bottom-up effects in Scandinavian mountain tundra (Northern Sweden) where effects of climate warming have been observed and top-down interactions are expected to strengthen. But we test this a-priori hypothesis in winter and throughout the 3-4 year rodent cycle, which imposes additional pulsed resource constraints. We used snowtracking data recorded in 12 winters (2004-2015) to analyse the spatial patterns of a tundra predator guild (arctic fox Vulpes lagopus, red fox Vulpes vulpes, wolverine Gulo gulo) and small prey (ptarmigan, Lagopus spp). The a-priori top-down hypothesis was then tested through structural equation modelling, for each phase of the rodent cycle. There was weak support for this hypothesis, with top-down effects only discerned on arctic fox (weakly, by wolverine) and ptarmigan (by arctic fox) at intermediate and high rodent availability respectively. Overall, bottom-up constraints appeared more influential on the winter community structure. Cold specialist predators (arctic fox and wolverine) showed variable landscape associations, while the boreal predator (red fox) appeared strongly dependent on productive habitats and ptarmigan abundance. Thus, we suggest that the unpredictability of food resources determines the winter ecology of the cold specialist predators, while the boreal predator relies on resource rich habitats. The constraints imposed by winters and temporary resource lows should therefore counteract productivity-driven ecosystem change and have a stabilizing effect on community structure. Hence, the interplay between summer ... Other/Unknown Material Arctic Fox Arctic Global warming Gulo gulo Northern Sweden Tundra Vulpes lagopus Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) Arctic |
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Data Archiving and Networked Services (DANS): EASY (KNAW - Koninklijke Nederlandse Akademie van Wetenschappen) |
op_collection_id |
ftdans |
language |
unknown |
topic |
Life sciences medicine and health care |
spellingShingle |
Life sciences medicine and health care Stoessel, Marianne Elmhagen, Bodil Vinka, Mikael Hellström, Peter Angerbjörn, Anders Data from: The fluctuating world of a tundra predator guild: bottom-up constraints overrule top-down species interactions in winter |
topic_facet |
Life sciences medicine and health care |
description |
Global warming is predicted to change ecosystem functioning and structure in Arctic ecosystems by strengthening top-down species interactions, i.e. predation pressure on small herbivores and interference between predators. Yet, previous research is biased towards the summer season. Due to greater abiotic constraints, Arctic ecosystem characteristics might be more pronounced in winter. Here we test the hypothesis that top-down species interactions prevail over bottom-up effects in Scandinavian mountain tundra (Northern Sweden) where effects of climate warming have been observed and top-down interactions are expected to strengthen. But we test this a-priori hypothesis in winter and throughout the 3-4 year rodent cycle, which imposes additional pulsed resource constraints. We used snowtracking data recorded in 12 winters (2004-2015) to analyse the spatial patterns of a tundra predator guild (arctic fox Vulpes lagopus, red fox Vulpes vulpes, wolverine Gulo gulo) and small prey (ptarmigan, Lagopus spp). The a-priori top-down hypothesis was then tested through structural equation modelling, for each phase of the rodent cycle. There was weak support for this hypothesis, with top-down effects only discerned on arctic fox (weakly, by wolverine) and ptarmigan (by arctic fox) at intermediate and high rodent availability respectively. Overall, bottom-up constraints appeared more influential on the winter community structure. Cold specialist predators (arctic fox and wolverine) showed variable landscape associations, while the boreal predator (red fox) appeared strongly dependent on productive habitats and ptarmigan abundance. Thus, we suggest that the unpredictability of food resources determines the winter ecology of the cold specialist predators, while the boreal predator relies on resource rich habitats. The constraints imposed by winters and temporary resource lows should therefore counteract productivity-driven ecosystem change and have a stabilizing effect on community structure. Hence, the interplay between summer ... |
author |
Stoessel, Marianne Elmhagen, Bodil Vinka, Mikael Hellström, Peter Angerbjörn, Anders |
author_facet |
Stoessel, Marianne Elmhagen, Bodil Vinka, Mikael Hellström, Peter Angerbjörn, Anders |
author_sort |
Stoessel, Marianne |
title |
Data from: The fluctuating world of a tundra predator guild: bottom-up constraints overrule top-down species interactions in winter |
title_short |
Data from: The fluctuating world of a tundra predator guild: bottom-up constraints overrule top-down species interactions in winter |
title_full |
Data from: The fluctuating world of a tundra predator guild: bottom-up constraints overrule top-down species interactions in winter |
title_fullStr |
Data from: The fluctuating world of a tundra predator guild: bottom-up constraints overrule top-down species interactions in winter |
title_full_unstemmed |
Data from: The fluctuating world of a tundra predator guild: bottom-up constraints overrule top-down species interactions in winter |
title_sort |
data from: the fluctuating world of a tundra predator guild: bottom-up constraints overrule top-down species interactions in winter |
publishDate |
2018 |
url |
http://nbn-resolving.org/urn:nbn:nl:ui:13-lz-p7jp https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:112374 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Fox Arctic Global warming Gulo gulo Northern Sweden Tundra Vulpes lagopus |
genre_facet |
Arctic Fox Arctic Global warming Gulo gulo Northern Sweden Tundra Vulpes lagopus |
op_relation |
doi:10.5061/dryad.rk64m4c/1 doi:10.1111/ecog.03984 http://nbn-resolving.org/urn:nbn:nl:ui:13-lz-p7jp doi:10.5061/dryad.rk64m4c https://easy.dans.knaw.nl/ui/datasets/id/easy-dataset:112374 |
op_rights |
OPEN_ACCESS: The data are archived in Easy, they are accessible elsewhere through the DOI https://dans.knaw.nl/en/about/organisation-and-policy/legal-information/DANSLicence.pdf |
op_doi |
https://doi.org/10.5061/dryad.rk64m4c/110.1111/ecog.0398410.5061/dryad.rk64m4c |
_version_ |
1770275208716877824 |