Parasitoid communities in a changing Arctic climate : from species traits to ecosystem functioning
Climate change is affecting species distributions and phenologies. These changes may in turn affect how species interact with each other. Thus, species-specific effects of a changing environment are expected to affect the whole food web. Due to this dynamic complexity, community and ecosystem level...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/314152 2023-08-20T04:04:03+02:00 Parasitoid communities in a changing Arctic climate : from species traits to ecosystem functioning Kankaanpää, Tuomas Tammaru, Toomas University of Helsinki, Faculty of Agriculture and Forestry, Department of Agricultural Sciences Doctoral Programme in Wildlife Biology Helsingin yliopisto, maatalous-metsätieteellinen tiedekunta Luonnonvaraisten eliöiden tutkimuksen tohtoriohjelma Helsingfors universitet, agrikultur-forstvetenskapliga fakulteten Doktorandprogrammet i forskning om vilda organismer Roslin, Tomas Vesterinen, Eero 2020-04-17T07:49:35Z application/pdf http://hdl.handle.net/10138/314152 eng eng Helsingin yliopisto Helsingfors universitet University of Helsinki URN:ISBN:978-951-51-6036-2 2020 http://hdl.handle.net/10138/314152 URN:ISBN:978-951-51-6037-9 Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. Publikationen är skyddad av upphovsrätten. Den får läsas och skrivas ut för personligt bruk. Användning i kommersiellt syfte är förbjuden. ekologia Text Doctoral dissertation (article-based) Artikkeliväitöskirja Artikelavhandling doctoralThesis 2020 ftunivhelsihelda 2023-07-28T06:13:06Z Climate change is affecting species distributions and phenologies. These changes may in turn affect how species interact with each other. Thus, species-specific effects of a changing environment are expected to affect the whole food web. Due to this dynamic complexity, community and ecosystem level responses to climate change are still relatively poorly understood. In this thesis I use the Arctic ecosystem to fill in some of this knowledge gap. For this, the interaction webs of Arctic communities are ideal, as they are simple enough to sample adequately. At the same time, the Arctic has been warming twice as fast as the rest of the globe, likely accentuating the effects of climate change. In my thesis, I concentrate on a module of the total food web, the insect parasitoids, insect herbivores and a widespread flowering plant, Mountain Avens (Dryas). I specifically study how climatic factors affect each species in the community, whether species’ responses be predicted based on species traits such as parasitism strategy (koinobiontism versus idiobiontism), and whether different trophic levels respond in concert. To strengthen my conclusions as based on a purely observational study design, I approach these questions at different spatial and temporal scales. I examine local altitudinal gradients within a walking distance. I organize a similar sampling at a geographical scale, which includes latitudinal variation in climate as well as regions which have experienced different types of climate change. Finally, I contrast these spatial snapshots against a real time series at a single location. In the first chapter I asses both how plant and arthropod phenologies respond to climatic factors over time, but also how the landscape level patterns in snow conditions are changing. I found phenological sensitivities of arthropods to vary with their feeding guild, supporting the idea of climate change induced changes in phenological matching between interacting species. The spatial pattern in the relative timing of snowmelt was ... Doctoral or Postdoctoral Thesis Arctic Climate change Mountain avens Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto Arctic |
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collection |
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
ekologia |
spellingShingle |
ekologia Kankaanpää, Tuomas Parasitoid communities in a changing Arctic climate : from species traits to ecosystem functioning |
topic_facet |
ekologia |
description |
Climate change is affecting species distributions and phenologies. These changes may in turn affect how species interact with each other. Thus, species-specific effects of a changing environment are expected to affect the whole food web. Due to this dynamic complexity, community and ecosystem level responses to climate change are still relatively poorly understood. In this thesis I use the Arctic ecosystem to fill in some of this knowledge gap. For this, the interaction webs of Arctic communities are ideal, as they are simple enough to sample adequately. At the same time, the Arctic has been warming twice as fast as the rest of the globe, likely accentuating the effects of climate change. In my thesis, I concentrate on a module of the total food web, the insect parasitoids, insect herbivores and a widespread flowering plant, Mountain Avens (Dryas). I specifically study how climatic factors affect each species in the community, whether species’ responses be predicted based on species traits such as parasitism strategy (koinobiontism versus idiobiontism), and whether different trophic levels respond in concert. To strengthen my conclusions as based on a purely observational study design, I approach these questions at different spatial and temporal scales. I examine local altitudinal gradients within a walking distance. I organize a similar sampling at a geographical scale, which includes latitudinal variation in climate as well as regions which have experienced different types of climate change. Finally, I contrast these spatial snapshots against a real time series at a single location. In the first chapter I asses both how plant and arthropod phenologies respond to climatic factors over time, but also how the landscape level patterns in snow conditions are changing. I found phenological sensitivities of arthropods to vary with their feeding guild, supporting the idea of climate change induced changes in phenological matching between interacting species. The spatial pattern in the relative timing of snowmelt was ... |
author2 |
Tammaru, Toomas University of Helsinki, Faculty of Agriculture and Forestry, Department of Agricultural Sciences Doctoral Programme in Wildlife Biology Helsingin yliopisto, maatalous-metsätieteellinen tiedekunta Luonnonvaraisten eliöiden tutkimuksen tohtoriohjelma Helsingfors universitet, agrikultur-forstvetenskapliga fakulteten Doktorandprogrammet i forskning om vilda organismer Roslin, Tomas Vesterinen, Eero |
format |
Doctoral or Postdoctoral Thesis |
author |
Kankaanpää, Tuomas |
author_facet |
Kankaanpää, Tuomas |
author_sort |
Kankaanpää, Tuomas |
title |
Parasitoid communities in a changing Arctic climate : from species traits to ecosystem functioning |
title_short |
Parasitoid communities in a changing Arctic climate : from species traits to ecosystem functioning |
title_full |
Parasitoid communities in a changing Arctic climate : from species traits to ecosystem functioning |
title_fullStr |
Parasitoid communities in a changing Arctic climate : from species traits to ecosystem functioning |
title_full_unstemmed |
Parasitoid communities in a changing Arctic climate : from species traits to ecosystem functioning |
title_sort |
parasitoid communities in a changing arctic climate : from species traits to ecosystem functioning |
publisher |
Helsingin yliopisto |
publishDate |
2020 |
url |
http://hdl.handle.net/10138/314152 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Mountain avens |
genre_facet |
Arctic Climate change Mountain avens |
op_relation |
URN:ISBN:978-951-51-6036-2 2020 http://hdl.handle.net/10138/314152 URN:ISBN:978-951-51-6037-9 |
op_rights |
Julkaisu on tekijänoikeussäännösten alainen. Teosta voi lukea ja tulostaa henkilökohtaista käyttöä varten. Käyttö kaupallisiin tarkoituksiin on kielletty. This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited. Publikationen är skyddad av upphovsrätten. Den får läsas och skrivas ut för personligt bruk. Användning i kommersiellt syfte är förbjuden. |
_version_ |
1774714477873201152 |