Understanding the biodiversity and ecological importance of ctenophores Lessons from Arctic and Baltic Mertensia ovum
Gelatinous zooplankton, such as ctenophores, have attracted attention during the last decade,mainly as a result of the enigma around their potentially increased abundances around the world. Despite the increased attention, they remain either understudied or disregarded in most food web investigation...
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Helsingin yliopisto
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/43182 2023-08-20T04:04:02+02:00 Understanding the biodiversity and ecological importance of ctenophores Lessons from Arctic and Baltic Mertensia ovum Kampamaneettien monimuotoisuudesta ja ekologisesta roolista : esimerkkinä Jää- ja Itämeren Mertensia ovum Majaneva, Sanna Haddock, Steven University of Helsinki, Faculty of Biological and Environmental Sciences, Department of Environmental Sciences University Centre in Svalbard, Norway Finnish Environment Institute, Marine Research Centre, Finland Tvärminne Zoological Station, Finland. Helsingin yliopisto, bio- ja ympäristötieteellinen tiedekunta, ympäristötieteiden laitos Helsingfors universitet, bio- och miljövetenskapliga fakulteten, miljövetenskapliga institutionen Berge, Jørgen Gorokhova, Elena Lehtiniemi, Maiju 2014-03-18T08:12:43Z application/pdf http://hdl.handle.net/10138/43182 eng eng Helsingin yliopisto Helsingfors universitet University of Helsinki URN:ISBN:978-952-67851-5-8 Walter and Andrée de Nottbeck Foundation Scientific Reports http://hdl.handle.net/10138/43182 URN:ISBN:978-952-67851-6-5 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. meribiologia Text Doctoral dissertation (article-based) Artikkeliväitöskirja Artikelavhandling doctoralThesis 2014 ftunivhelsihelda 2023-07-28T06:14:06Z Gelatinous zooplankton, such as ctenophores, have attracted attention during the last decade,mainly as a result of the enigma around their potentially increased abundances around the world. Despite the increased attention, they remain either understudied or disregarded in most food web investigations and monitoring programs, and are defined as one of the most difficult groups of pelagic animals to study. Consequently, their diversity and ecological role are often grossly oversimplified and misunderstood, leading to biased views of ecosystem functioning. In addition, ctenophores share traits such as voracious predation behavior, the ability to starve and shrink during periods of low food availability and to tolerate increased temperatures, as well as high reproductive capacity, making them likely to take advantage of changing environmental conditions. In the Arctic, earlier ctenophore data consist of sparse abundance estimates and dietary studies lacking a systematic or integrative approach. In the Baltic Sea, despite the wellestablished routine plankton monitoring program conducted by the surrounding nations, the distribution and the role of the Arctic ctenophore Mertensia ovum in this ecosystem has been unknown since its first reported appearance in 2007. In this thesis, the biodiversity of cydippid ctenophores and their role in Svalbard waters and in the Baltic Sea were studied. Extensive in situ sampling, laboratory experiments, morphological and molecular identification analysis, traditional and molecular gut content analysis, as well as several direct measures of the ctenophores and the pelagic communities they inhabit were combined to address system-specific questions and to better understand how important a role the ctenophores might have in marine ecosystems. A combination of morphological species identification and molecular methods revealed Euplokamis sp. and an unidentified mertensiid species to co-occur with the dominating Mertensia ovum in Arctic waters. Similarly, the first recording of the ... Doctoral or Postdoctoral Thesis Arctic Svalbard Zooplankton Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto Arctic Svalbard |
institution |
Open Polar |
collection |
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
meribiologia |
spellingShingle |
meribiologia Majaneva, Sanna Understanding the biodiversity and ecological importance of ctenophores Lessons from Arctic and Baltic Mertensia ovum |
topic_facet |
meribiologia |
description |
Gelatinous zooplankton, such as ctenophores, have attracted attention during the last decade,mainly as a result of the enigma around their potentially increased abundances around the world. Despite the increased attention, they remain either understudied or disregarded in most food web investigations and monitoring programs, and are defined as one of the most difficult groups of pelagic animals to study. Consequently, their diversity and ecological role are often grossly oversimplified and misunderstood, leading to biased views of ecosystem functioning. In addition, ctenophores share traits such as voracious predation behavior, the ability to starve and shrink during periods of low food availability and to tolerate increased temperatures, as well as high reproductive capacity, making them likely to take advantage of changing environmental conditions. In the Arctic, earlier ctenophore data consist of sparse abundance estimates and dietary studies lacking a systematic or integrative approach. In the Baltic Sea, despite the wellestablished routine plankton monitoring program conducted by the surrounding nations, the distribution and the role of the Arctic ctenophore Mertensia ovum in this ecosystem has been unknown since its first reported appearance in 2007. In this thesis, the biodiversity of cydippid ctenophores and their role in Svalbard waters and in the Baltic Sea were studied. Extensive in situ sampling, laboratory experiments, morphological and molecular identification analysis, traditional and molecular gut content analysis, as well as several direct measures of the ctenophores and the pelagic communities they inhabit were combined to address system-specific questions and to better understand how important a role the ctenophores might have in marine ecosystems. A combination of morphological species identification and molecular methods revealed Euplokamis sp. and an unidentified mertensiid species to co-occur with the dominating Mertensia ovum in Arctic waters. Similarly, the first recording of the ... |
author2 |
Haddock, Steven University of Helsinki, Faculty of Biological and Environmental Sciences, Department of Environmental Sciences University Centre in Svalbard, Norway Finnish Environment Institute, Marine Research Centre, Finland Tvärminne Zoological Station, Finland. Helsingin yliopisto, bio- ja ympäristötieteellinen tiedekunta, ympäristötieteiden laitos Helsingfors universitet, bio- och miljövetenskapliga fakulteten, miljövetenskapliga institutionen Berge, Jørgen Gorokhova, Elena Lehtiniemi, Maiju |
format |
Doctoral or Postdoctoral Thesis |
author |
Majaneva, Sanna |
author_facet |
Majaneva, Sanna |
author_sort |
Majaneva, Sanna |
title |
Understanding the biodiversity and ecological importance of ctenophores Lessons from Arctic and Baltic Mertensia ovum |
title_short |
Understanding the biodiversity and ecological importance of ctenophores Lessons from Arctic and Baltic Mertensia ovum |
title_full |
Understanding the biodiversity and ecological importance of ctenophores Lessons from Arctic and Baltic Mertensia ovum |
title_fullStr |
Understanding the biodiversity and ecological importance of ctenophores Lessons from Arctic and Baltic Mertensia ovum |
title_full_unstemmed |
Understanding the biodiversity and ecological importance of ctenophores Lessons from Arctic and Baltic Mertensia ovum |
title_sort |
understanding the biodiversity and ecological importance of ctenophores lessons from arctic and baltic mertensia ovum |
publisher |
Helsingin yliopisto |
publishDate |
2014 |
url |
http://hdl.handle.net/10138/43182 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Svalbard Zooplankton |
genre_facet |
Arctic Svalbard Zooplankton |
op_relation |
URN:ISBN:978-952-67851-5-8 Walter and Andrée de Nottbeck Foundation Scientific Reports http://hdl.handle.net/10138/43182 URN:ISBN:978-952-67851-6-5 |
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_ |
1774714469552750592 |