Dynamic effects of insect herbivory and climate on tundra shrub growth: roles of browsing and ramet age
1. To predict shrub responses under climate change in tundra, we need to understand how thermal conditions and herbivory contribute to growth. We hypothesise that shrub growth increases with thermal conditions and precipitation, but that this increase is counteracted by insect herbivory, and that th...
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ftuniveasternfin:oai:erepo.uef.fi:123456789/23781 2023-05-15T15:13:40+02:00 Dynamic effects of insect herbivory and climate on tundra shrub growth: roles of browsing and ramet age Clark, Adam (Karl-Franzens-Universität Graz) Virtanen, Risto (University of Oulu) den Herder, Michael (European Forest Institute) Roininen, Heikki (University of Eastern Finland) 2020-11-19T10:48:57Z https://erepo.uef.fi/handle/123456789/23781 unknown https://datadryad.org/stash/share/o3JW3BkZ2aJm0U6qZM2Qc8551d-uWiSNOqrjkBrKEq0 doi:10.5061/dryad.wdbrv15mp https://erepo.uef.fi/handle/123456789/23781 https://creativecommons.org/publicdomain/zero/1.0/ CC0 PDM Arctic climate change long-term experiment plant-herbivore interactions Shrub tundra willow EDM 2020 ftuniveasternfin https://doi.org/10.5061/dryad.wdbrv15mp 2022-12-11T06:54:27Z 1. To predict shrub responses under climate change in tundra, we need to understand how thermal conditions and herbivory contribute to growth. We hypothesise that shrub growth increases with thermal conditions and precipitation, but that this increase is counteracted by insect herbivory, and that these climate-insect herbivory relationships are modified by both browsing and plant age. 2. We use empirical dynamic modelling (EDM) to analyse a 20-year time series on willow (Salix phylicifolia) shoot growth, growing degree days, summer precipitation and herbivory from an experiment at forest-tundra ecotone. The experiment includes manipulations of avian and mammal browsing (fences) and ramet age (pruning to rejuvenate willows). 3. Negative effects of insect herbivory on willow shoot growth were intensified during warmer years, whereas increasing precipitation led to reduced effects. Moreover, the effect of insect herbivores on shoot growth varied with ramet age and vertebrate browsing: Younger ramets generally experienced less negative insect herbivore effects, whereas Ptarmigan browsing was associated with more positive temperature effect on shoot growth, and reindeer browsing with more negative effects of insect herbivory and precipitation. 4. Synthesis. Our findings show that the negative effects of insect herbivory on shoot growth likely intensify under warmer thermal conditions, but that increasing precipitation can counteract these effects. Moreover, changing thermal conditions, precipitation and vertebrate browsers all have predictable, albeit complex and nonlinear, effects on shrub growth, highlighting the importance of long-term experimental data and flexible analytical methods such as EDM for characterizing climate and community interactions in artic systems. 4 Other/Unknown Material Arctic Climate change Tundra UEF eRepository (University of Eastern Finland) Arctic |
institution |
Open Polar |
collection |
UEF eRepository (University of Eastern Finland) |
op_collection_id |
ftuniveasternfin |
language |
unknown |
topic |
Arctic climate change long-term experiment plant-herbivore interactions Shrub tundra willow EDM |
spellingShingle |
Arctic climate change long-term experiment plant-herbivore interactions Shrub tundra willow EDM Clark, Adam (Karl-Franzens-Universität Graz) Virtanen, Risto (University of Oulu) den Herder, Michael (European Forest Institute) Roininen, Heikki (University of Eastern Finland) Dynamic effects of insect herbivory and climate on tundra shrub growth: roles of browsing and ramet age |
topic_facet |
Arctic climate change long-term experiment plant-herbivore interactions Shrub tundra willow EDM |
description |
1. To predict shrub responses under climate change in tundra, we need to understand how thermal conditions and herbivory contribute to growth. We hypothesise that shrub growth increases with thermal conditions and precipitation, but that this increase is counteracted by insect herbivory, and that these climate-insect herbivory relationships are modified by both browsing and plant age. 2. We use empirical dynamic modelling (EDM) to analyse a 20-year time series on willow (Salix phylicifolia) shoot growth, growing degree days, summer precipitation and herbivory from an experiment at forest-tundra ecotone. The experiment includes manipulations of avian and mammal browsing (fences) and ramet age (pruning to rejuvenate willows). 3. Negative effects of insect herbivory on willow shoot growth were intensified during warmer years, whereas increasing precipitation led to reduced effects. Moreover, the effect of insect herbivores on shoot growth varied with ramet age and vertebrate browsing: Younger ramets generally experienced less negative insect herbivore effects, whereas Ptarmigan browsing was associated with more positive temperature effect on shoot growth, and reindeer browsing with more negative effects of insect herbivory and precipitation. 4. Synthesis. Our findings show that the negative effects of insect herbivory on shoot growth likely intensify under warmer thermal conditions, but that increasing precipitation can counteract these effects. Moreover, changing thermal conditions, precipitation and vertebrate browsers all have predictable, albeit complex and nonlinear, effects on shrub growth, highlighting the importance of long-term experimental data and flexible analytical methods such as EDM for characterizing climate and community interactions in artic systems. 4 |
author |
Clark, Adam (Karl-Franzens-Universität Graz) Virtanen, Risto (University of Oulu) den Herder, Michael (European Forest Institute) Roininen, Heikki (University of Eastern Finland) |
author_facet |
Clark, Adam (Karl-Franzens-Universität Graz) Virtanen, Risto (University of Oulu) den Herder, Michael (European Forest Institute) Roininen, Heikki (University of Eastern Finland) |
author_sort |
Clark, Adam (Karl-Franzens-Universität Graz) |
title |
Dynamic effects of insect herbivory and climate on tundra shrub growth: roles of browsing and ramet age |
title_short |
Dynamic effects of insect herbivory and climate on tundra shrub growth: roles of browsing and ramet age |
title_full |
Dynamic effects of insect herbivory and climate on tundra shrub growth: roles of browsing and ramet age |
title_fullStr |
Dynamic effects of insect herbivory and climate on tundra shrub growth: roles of browsing and ramet age |
title_full_unstemmed |
Dynamic effects of insect herbivory and climate on tundra shrub growth: roles of browsing and ramet age |
title_sort |
dynamic effects of insect herbivory and climate on tundra shrub growth: roles of browsing and ramet age |
publishDate |
2020 |
url |
https://erepo.uef.fi/handle/123456789/23781 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Tundra |
genre_facet |
Arctic Climate change Tundra |
op_relation |
https://datadryad.org/stash/share/o3JW3BkZ2aJm0U6qZM2Qc8551d-uWiSNOqrjkBrKEq0 doi:10.5061/dryad.wdbrv15mp https://erepo.uef.fi/handle/123456789/23781 |
op_rights |
https://creativecommons.org/publicdomain/zero/1.0/ |
op_rightsnorm |
CC0 PDM |
op_doi |
https://doi.org/10.5061/dryad.wdbrv15mp |
_version_ |
1766344190527012864 |