The impact of thermal seasonality on terrestrial endotherm food web dynamics: a revision of the Exploitation Ecosystem Hypothesis
Many terrestrial endotherm food webs constitute three trophic level cascades. Others have two trophic level dynamics (food limited herbivores; plants adapted to tackle intense herbivory) or one trophic level dynamic (herbivorous endotherms absent, thus plants compete for the few places where they ca...
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ftntnutrondheimi:oai:ntnuopen.ntnu.no:11250/2711359 2023-05-15T18:40:37+02:00 The impact of thermal seasonality on terrestrial endotherm food web dynamics: a revision of the Exploitation Ecosystem Hypothesis Oksanen, Tarja Maarit Oksanen, Lauri Vuorinen, Katariina Wolf, Christopher Mäkynen, Aurelia Olofsson, Johan Ripple, William J. Virtanen, Risto Utsi, Tove Aagnes 2020 application/pdf https://hdl.handle.net/11250/2711359 https://doi.org/10.1111/ecog.05076 eng eng Wiley Ecography. 2020, 43 1-19. urn:issn:0906-7590 https://hdl.handle.net/11250/2711359 https://doi.org/10.1111/ecog.05076 cristin:1839677 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no CC-BY 1-19 43 Ecography Peer reviewed Journal article 2020 ftntnutrondheimi https://doi.org/10.1111/ecog.05076 2020-12-09T23:34:27Z Many terrestrial endotherm food webs constitute three trophic level cascades. Others have two trophic level dynamics (food limited herbivores; plants adapted to tackle intense herbivory) or one trophic level dynamic (herbivorous endotherms absent, thus plants compete for the few places where they can survive and grow). According to the Exploitation Ecosystems Hypothesis (EEH), these contrasting dynamics are consequences of differences in primary productivity. The productivity thresholds for changing food web dynamics were assumed to be global constants. We challenged this assumption and found that several model parameters are sensitive to the contrast between persistently warm and seasonally cold climates. In persistently warm environments, three trophic level dynamics can be expected to prevail almost everywhere, save the most extreme deserts. We revised EEH accordingly and tested it by compiling direct evidence of three and two trophic level dynamics and by studying the global distribution of felids. In seasonally cold environments, we found evidence for three trophic level dynamics only in productive ecosystems, while evidence for two trophic level dynamics appeared in ecosystems with low primary productivity. In persistently warm environments, we found evidence for three trophic level dynamics in all types of ecosystems. The distribution of felids corroborated these results. The empirical evidence thus indicates that two trophic level dynamics, as defined by EEH, are restricted to seasonally cold biomes with low primary productivity, such as the artic–alpine tundra and the temperate steppe. publishedVersion © 2020 The Authors. Ecography published by John Wiley & Sons Ltd on behalf of Nordic Society Oikos This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. Article in Journal/Newspaper Tundra NTNU Open Archive (Norwegian University of Science and Technology) Ecography 43 12 1859 1877 |
institution |
Open Polar |
collection |
NTNU Open Archive (Norwegian University of Science and Technology) |
op_collection_id |
ftntnutrondheimi |
language |
English |
description |
Many terrestrial endotherm food webs constitute three trophic level cascades. Others have two trophic level dynamics (food limited herbivores; plants adapted to tackle intense herbivory) or one trophic level dynamic (herbivorous endotherms absent, thus plants compete for the few places where they can survive and grow). According to the Exploitation Ecosystems Hypothesis (EEH), these contrasting dynamics are consequences of differences in primary productivity. The productivity thresholds for changing food web dynamics were assumed to be global constants. We challenged this assumption and found that several model parameters are sensitive to the contrast between persistently warm and seasonally cold climates. In persistently warm environments, three trophic level dynamics can be expected to prevail almost everywhere, save the most extreme deserts. We revised EEH accordingly and tested it by compiling direct evidence of three and two trophic level dynamics and by studying the global distribution of felids. In seasonally cold environments, we found evidence for three trophic level dynamics only in productive ecosystems, while evidence for two trophic level dynamics appeared in ecosystems with low primary productivity. In persistently warm environments, we found evidence for three trophic level dynamics in all types of ecosystems. The distribution of felids corroborated these results. The empirical evidence thus indicates that two trophic level dynamics, as defined by EEH, are restricted to seasonally cold biomes with low primary productivity, such as the artic–alpine tundra and the temperate steppe. publishedVersion © 2020 The Authors. Ecography published by John Wiley & Sons Ltd on behalf of Nordic Society Oikos This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
format |
Article in Journal/Newspaper |
author |
Oksanen, Tarja Maarit Oksanen, Lauri Vuorinen, Katariina Wolf, Christopher Mäkynen, Aurelia Olofsson, Johan Ripple, William J. Virtanen, Risto Utsi, Tove Aagnes |
spellingShingle |
Oksanen, Tarja Maarit Oksanen, Lauri Vuorinen, Katariina Wolf, Christopher Mäkynen, Aurelia Olofsson, Johan Ripple, William J. Virtanen, Risto Utsi, Tove Aagnes The impact of thermal seasonality on terrestrial endotherm food web dynamics: a revision of the Exploitation Ecosystem Hypothesis |
author_facet |
Oksanen, Tarja Maarit Oksanen, Lauri Vuorinen, Katariina Wolf, Christopher Mäkynen, Aurelia Olofsson, Johan Ripple, William J. Virtanen, Risto Utsi, Tove Aagnes |
author_sort |
Oksanen, Tarja Maarit |
title |
The impact of thermal seasonality on terrestrial endotherm food web dynamics: a revision of the Exploitation Ecosystem Hypothesis |
title_short |
The impact of thermal seasonality on terrestrial endotherm food web dynamics: a revision of the Exploitation Ecosystem Hypothesis |
title_full |
The impact of thermal seasonality on terrestrial endotherm food web dynamics: a revision of the Exploitation Ecosystem Hypothesis |
title_fullStr |
The impact of thermal seasonality on terrestrial endotherm food web dynamics: a revision of the Exploitation Ecosystem Hypothesis |
title_full_unstemmed |
The impact of thermal seasonality on terrestrial endotherm food web dynamics: a revision of the Exploitation Ecosystem Hypothesis |
title_sort |
impact of thermal seasonality on terrestrial endotherm food web dynamics: a revision of the exploitation ecosystem hypothesis |
publisher |
Wiley |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2711359 https://doi.org/10.1111/ecog.05076 |
genre |
Tundra |
genre_facet |
Tundra |
op_source |
1-19 43 Ecography |
op_relation |
Ecography. 2020, 43 1-19. urn:issn:0906-7590 https://hdl.handle.net/11250/2711359 https://doi.org/10.1111/ecog.05076 cristin:1839677 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1111/ecog.05076 |
container_title |
Ecography |
container_volume |
43 |
container_issue |
12 |
container_start_page |
1859 |
op_container_end_page |
1877 |
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1766230004600930304 |