Changing climate and the Baltic region biota
The Baltic region is characterised by a strong seasonal climate. Climate change may bring profound ecological changes in the region. These ecological responses to a changing climate can be better understood if the effects of recent yearly variations are known. Other ways to explore possible conseque...
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Helsingin yliopisto
2020
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Online Access: | http://hdl.handle.net/10138/313939 |
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/313939 2023-08-20T04:09:23+02:00 Changing climate and the Baltic region biota Halkka, Antti Ahola, Markus University of Helsinki, Faculty of Biological and Environmental Sciences, Organismal and Evolutionary Biology Research Programme Doctoral Programme in Wildlife Biology Tvärminnen eläintieteellinen asema Helsingin yliopisto, bio- ja ympäristötieteellinen tiedekunta Luonnonvaraisten eliöiden tutkimuksen tohtoriohjelma Helsingfors universitet, bio- och miljövetenskapliga fakulteten Doktorandprogrammet i forskning om vilda organismer Ranta, Esa Kaitala, Veijo Lehikoinen, Aleksi 2020-04-09T04:55:50Z application/pdf http://hdl.handle.net/10138/313939 eng eng Helsingin yliopisto Helsingfors universitet University of Helsinki URN:ISBN:978-951-51-6020-1 Picaset Oy: omakustanne, 2020 http://hdl.handle.net/10138/313939 URN:ISBN:978-951-51-6021-8 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 ja evoluutiobiologia Text Doctoral dissertation (article-based) Artikkeliväitöskirja Artikelavhandling doctoralThesis 2020 ftunivhelsihelda 2023-07-28T06:20:16Z The Baltic region is characterised by a strong seasonal climate. Climate change may bring profound ecological changes in the region. These ecological responses to a changing climate can be better understood if the effects of recent yearly variations are known. Other ways to explore possible consequences to future climate change are by using climate models and by looking at the response of species to a warmer climate during the past millennia. This thesis utilizes these methods including a range of study species: a mammal, migratory birds, and an insect. The mammalian species studied is the Baltic ringed seal (Pusa hispida botnica), a subspecies of the ringed seal. Ringed seals need ice as a substrate for breeding, including the construction of a breeding lair. It is shown (study I) that the projected changes in the ice climate for 2071–2100 in the southern breeding areas (the Gulf of Finland, the Archipelago Sea and the Gulf of Riga) are so large, that for most years successful breeding is unlikely. In the northernmost parts of the Bothnian Bay, the ice climate is still projected to be suitable for breeding for most years. By the end of this century, it is possible that the Bothnian Bay will be the only remaining breeding area for the Baltic ringed seal. Based on an extensive material of subfossil seal finds, study (II) suggests that ringed seals have probably lived continuously in the Baltic Sea for more than 10,000 years, even surviving the Holocene Thermal Maximum (a several millennia-long warm period). As the warm winters of the Holocene probably weren't as warm as the temperatures projected for the final decades of this century, the survival prospects of the ringed seal in the Baltic will probably be reduced in a way unprecedented in the history of the subspecies. The bird study (III) adds to the growing evidence that temperatures along migration routes have an effect on arrival times. We found negative correlations between temperature and arrival times in several of the ten studied long-distance Finnish ... Doctoral or Postdoctoral Thesis Pusa hispida ringed seal Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto Lair ENVELOPE(-61.040,-61.040,-62.618,-62.618) |
institution |
Open Polar |
collection |
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
ekologia ja evoluutiobiologia |
spellingShingle |
ekologia ja evoluutiobiologia Halkka, Antti Changing climate and the Baltic region biota |
topic_facet |
ekologia ja evoluutiobiologia |
description |
The Baltic region is characterised by a strong seasonal climate. Climate change may bring profound ecological changes in the region. These ecological responses to a changing climate can be better understood if the effects of recent yearly variations are known. Other ways to explore possible consequences to future climate change are by using climate models and by looking at the response of species to a warmer climate during the past millennia. This thesis utilizes these methods including a range of study species: a mammal, migratory birds, and an insect. The mammalian species studied is the Baltic ringed seal (Pusa hispida botnica), a subspecies of the ringed seal. Ringed seals need ice as a substrate for breeding, including the construction of a breeding lair. It is shown (study I) that the projected changes in the ice climate for 2071–2100 in the southern breeding areas (the Gulf of Finland, the Archipelago Sea and the Gulf of Riga) are so large, that for most years successful breeding is unlikely. In the northernmost parts of the Bothnian Bay, the ice climate is still projected to be suitable for breeding for most years. By the end of this century, it is possible that the Bothnian Bay will be the only remaining breeding area for the Baltic ringed seal. Based on an extensive material of subfossil seal finds, study (II) suggests that ringed seals have probably lived continuously in the Baltic Sea for more than 10,000 years, even surviving the Holocene Thermal Maximum (a several millennia-long warm period). As the warm winters of the Holocene probably weren't as warm as the temperatures projected for the final decades of this century, the survival prospects of the ringed seal in the Baltic will probably be reduced in a way unprecedented in the history of the subspecies. The bird study (III) adds to the growing evidence that temperatures along migration routes have an effect on arrival times. We found negative correlations between temperature and arrival times in several of the ten studied long-distance Finnish ... |
author2 |
Ahola, Markus University of Helsinki, Faculty of Biological and Environmental Sciences, Organismal and Evolutionary Biology Research Programme Doctoral Programme in Wildlife Biology Tvärminnen eläintieteellinen asema Helsingin yliopisto, bio- ja ympäristötieteellinen tiedekunta Luonnonvaraisten eliöiden tutkimuksen tohtoriohjelma Helsingfors universitet, bio- och miljövetenskapliga fakulteten Doktorandprogrammet i forskning om vilda organismer Ranta, Esa Kaitala, Veijo Lehikoinen, Aleksi |
format |
Doctoral or Postdoctoral Thesis |
author |
Halkka, Antti |
author_facet |
Halkka, Antti |
author_sort |
Halkka, Antti |
title |
Changing climate and the Baltic region biota |
title_short |
Changing climate and the Baltic region biota |
title_full |
Changing climate and the Baltic region biota |
title_fullStr |
Changing climate and the Baltic region biota |
title_full_unstemmed |
Changing climate and the Baltic region biota |
title_sort |
changing climate and the baltic region biota |
publisher |
Helsingin yliopisto |
publishDate |
2020 |
url |
http://hdl.handle.net/10138/313939 |
long_lat |
ENVELOPE(-61.040,-61.040,-62.618,-62.618) |
geographic |
Lair |
geographic_facet |
Lair |
genre |
Pusa hispida ringed seal |
genre_facet |
Pusa hispida ringed seal |
op_relation |
URN:ISBN:978-951-51-6020-1 Picaset Oy: omakustanne, 2020 http://hdl.handle.net/10138/313939 URN:ISBN:978-951-51-6021-8 |
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_ |
1774722310597509120 |