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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Online Access: | https://hdl.handle.net/10037/19945 https://doi.org/10.1111/ecog.05076 |
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ftunivtroemsoe:oai:munin.uit.no:10037/19945 2023-05-15T18:40:35+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 2020-09-06 https://hdl.handle.net/10037/19945 https://doi.org/10.1111/ecog.05076 eng eng Wiley Ecography info:eu-repo/grantAgreement/RCN/FRIMEDBIO/262064/Norway/Disentangling the impacts of herbivory and climate on ecological dynamics// FRIDAID 1839677 doi:10.1111/ecog.05076 0906-7590 1600-0587 https://hdl.handle.net/10037/19945 openAccess Copyright 2020 The Author(s) VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2020 ftunivtroemsoe https://doi.org/10.1111/ecog.05076 2021-06-25T17:57:49Z 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. Article in Journal/Newspaper Tundra University of Tromsø: Munin Open Research Archive Ecography 43 12 1859 1877 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 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 |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
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. |
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 |
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/10037/19945 https://doi.org/10.1111/ecog.05076 |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
Ecography info:eu-repo/grantAgreement/RCN/FRIMEDBIO/262064/Norway/Disentangling the impacts of herbivory and climate on ecological dynamics// FRIDAID 1839677 doi:10.1111/ecog.05076 0906-7590 1600-0587 https://hdl.handle.net/10037/19945 |
op_rights |
openAccess Copyright 2020 The Author(s) |
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 |
_version_ |
1766229965848707072 |