Microphytobenthos in cold-water sublitoral systems : their ecological role and response to changing environmental conditions
In my thesis, the main aim was to study and compare subtidal microphytobenthos communities and their activity from sandy sediments of an Arctic (Spitsbergen, Svalbard) and a temperate (Helgoland, North Sea) study site. Helgoland was chosen as a comparative site because of the tight link between the...
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Universität Bremen
2014
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Online Access: | https://media.suub.uni-bremen.de/handle/elib/680 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103847-17 |
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/680 2023-05-15T14:56:56+02:00 Microphytobenthos in cold-water sublitoral systems : their ecological role and response to changing environmental conditions Mikrophytobenthos in sublitoralen Kaltwasserregionen : ihre ökologische Rolle und Reaktion auf sich verändernde Umweltbedingungen Sevilgen, Duygu Sevgi Brey, Thomas Bischof, Kai 2014-03-26 application/pdf https://media.suub.uni-bremen.de/handle/elib/680 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103847-17 eng eng Universität Bremen FB2 Biologie/Chemie https://media.suub.uni-bremen.de/handle/elib/680 urn:nbn:de:gbv:46-00103847-17 info:eu-repo/semantics/openAccess Mikrophytobenthos Diatomeen Benthische Photosynthese Arktis Nordsee Spitsbergen Helgoland 550 550 Earth sciences and geology ddc:550 Dissertation doctoralThesis 2014 ftsubbremen 2022-11-09T07:09:25Z In my thesis, the main aim was to study and compare subtidal microphytobenthos communities and their activity from sandy sediments of an Arctic (Spitsbergen, Svalbard) and a temperate (Helgoland, North Sea) study site. Helgoland was chosen as a comparative site because of the tight link between the North Sea and the western coast of Spitsbergen due to ocean currents. The research objective was realized in three consecutive studies. The specific questions in this study were: (i) How do MPB net photosynthesis and respiration (in terms of oxygen production and consumption) compare in Helgoland and Svalbard? Who are the main players of the MPB community, and what is the daily net oxygen budget under natural (in situ) conditions? Will the communities and their photosynthetic performances (light adaptation, maximum photosynthesis) be site‐specific, or will they be similar? (ii) Will the photosynthesis and respiration response of the temperate and sub-Arctic MPB community to short-term temperature increases be different? Will the sub-Arctic site be more adapted as it experiences higher temperature fluctuations in situ on a short term scale (daily/ hourly) than the temperate site? Will the MPB communities develop towards a net-heterotrophy as previously shown for benthic communities? (iii) Will an upward shift of the temperature baseline and increase of nutrients have consequences for the growth of MPB communities from Helgoland and Svalbard? Will the MPB community grow best under lowest, intermediate or highest temperatures from within the in situ temperature range? Will their growth be dependent on the addition of nutrients? Will they grow with the same speed and reach similar biomasses, or will there be differences because of differences in their natural light and temperature regimes? Doctoral or Postdoctoral Thesis Arctic Arktis Arktis* Svalbard Spitsbergen Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Arctic Svalbard Helgoland |
institution |
Open Polar |
collection |
Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
Mikrophytobenthos Diatomeen Benthische Photosynthese Arktis Nordsee Spitsbergen Helgoland 550 550 Earth sciences and geology ddc:550 |
spellingShingle |
Mikrophytobenthos Diatomeen Benthische Photosynthese Arktis Nordsee Spitsbergen Helgoland 550 550 Earth sciences and geology ddc:550 Sevilgen, Duygu Sevgi Microphytobenthos in cold-water sublitoral systems : their ecological role and response to changing environmental conditions |
topic_facet |
Mikrophytobenthos Diatomeen Benthische Photosynthese Arktis Nordsee Spitsbergen Helgoland 550 550 Earth sciences and geology ddc:550 |
description |
In my thesis, the main aim was to study and compare subtidal microphytobenthos communities and their activity from sandy sediments of an Arctic (Spitsbergen, Svalbard) and a temperate (Helgoland, North Sea) study site. Helgoland was chosen as a comparative site because of the tight link between the North Sea and the western coast of Spitsbergen due to ocean currents. The research objective was realized in three consecutive studies. The specific questions in this study were: (i) How do MPB net photosynthesis and respiration (in terms of oxygen production and consumption) compare in Helgoland and Svalbard? Who are the main players of the MPB community, and what is the daily net oxygen budget under natural (in situ) conditions? Will the communities and their photosynthetic performances (light adaptation, maximum photosynthesis) be site‐specific, or will they be similar? (ii) Will the photosynthesis and respiration response of the temperate and sub-Arctic MPB community to short-term temperature increases be different? Will the sub-Arctic site be more adapted as it experiences higher temperature fluctuations in situ on a short term scale (daily/ hourly) than the temperate site? Will the MPB communities develop towards a net-heterotrophy as previously shown for benthic communities? (iii) Will an upward shift of the temperature baseline and increase of nutrients have consequences for the growth of MPB communities from Helgoland and Svalbard? Will the MPB community grow best under lowest, intermediate or highest temperatures from within the in situ temperature range? Will their growth be dependent on the addition of nutrients? Will they grow with the same speed and reach similar biomasses, or will there be differences because of differences in their natural light and temperature regimes? |
author2 |
Brey, Thomas Bischof, Kai |
format |
Doctoral or Postdoctoral Thesis |
author |
Sevilgen, Duygu Sevgi |
author_facet |
Sevilgen, Duygu Sevgi |
author_sort |
Sevilgen, Duygu Sevgi |
title |
Microphytobenthos in cold-water sublitoral systems : their ecological role and response to changing environmental conditions |
title_short |
Microphytobenthos in cold-water sublitoral systems : their ecological role and response to changing environmental conditions |
title_full |
Microphytobenthos in cold-water sublitoral systems : their ecological role and response to changing environmental conditions |
title_fullStr |
Microphytobenthos in cold-water sublitoral systems : their ecological role and response to changing environmental conditions |
title_full_unstemmed |
Microphytobenthos in cold-water sublitoral systems : their ecological role and response to changing environmental conditions |
title_sort |
microphytobenthos in cold-water sublitoral systems : their ecological role and response to changing environmental conditions |
publisher |
Universität Bremen |
publishDate |
2014 |
url |
https://media.suub.uni-bremen.de/handle/elib/680 https://nbn-resolving.org/urn:nbn:de:gbv:46-00103847-17 |
geographic |
Arctic Svalbard Helgoland |
geographic_facet |
Arctic Svalbard Helgoland |
genre |
Arctic Arktis Arktis* Svalbard Spitsbergen |
genre_facet |
Arctic Arktis Arktis* Svalbard Spitsbergen |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/680 urn:nbn:de:gbv:46-00103847-17 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766328990625169408 |