Tomas Lundälv | University of Gothenburg (original) (raw)

Papers by Tomas Lundälv

Research paper thumbnail of In-situ photographs of common Antarctic glass sponges (Porifera: Hexactinellida: Rossellidae) along 7 ROV profiles during POLARSTERN cruise PS77 (ANT-XXVII/3, CAMBIO) in the Weddell Sea

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Research paper thumbnail of Rapport om misstänkt förekomst av trålning i det trålskyddade området på kallvattenkorallrevet vid Tisler

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Research paper thumbnail of R script and data for the analysis of sponges and asteroids abundances and sponges biomass

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Research paper thumbnail of A guide to the fish associated with deep-water coral

2nd International Symposium on Deep Sea Corals, Erlangen, Germany, 2003

Search: onr:"swepub:oai:services.scigloo.org:85957" > A guide to the fish... ... McC... more Search: onr:"swepub:oai:services.scigloo.org:85957" > A guide to the fish... ... McCrea, M (author) Costello, MJ (author) Freiwald, A (author) show more... Lundälv, Tomas, 1944- (author) Göteborgs universitet, Tjärnö marinbiologiska laboratorium Jonsson, Lisbeth G., 1955- (author) Göteborgs universitet, Institutionen för marin ekologi show less... University of Gothenburg Faculty of Sciences. Department of Marine Ecology. University of Gothenburg Faculty of Sciences. Tjärnö Marine Biological Laboratory. 2003 English. In: 2nd International ...

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Research paper thumbnail of Table 3) Average mound aggradation rates

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Research paper thumbnail of Bioerosion along a bathymetric gradient in a cold-temperate setting (Kosterfjord, SW Sweden): an experimental study

Facies, 2005

... Max Wisshak · Marcos Gektidis · André Freiwald · Tomas Lundälv ... the determination of bioer... more ... Max Wisshak · Marcos Gektidis · André Freiwald · Tomas Lundälv ... the determination of bioerosion and bioaccretion rates with respect to cal-cium carbonate, and their interpretation in a bathymetric and latitudinal context as an integral part of the global car-bon cycle is the ...

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Research paper thumbnail of Role of cold-water Lophelia pertusa coral reefs as fish habitat in the NE Atlantic

Cold-Water Corals and Ecosystems, 2005

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Research paper thumbnail of Ashallow-waterwhale-fall experiment in the north Atlantic

CBM - Cahiers de Biologie Marine, 2006

The study of hydrothermal vent and seep fauna is associated with great costs due to the deep and ... more The study of hydrothermal vent and seep fauna is associated with great costs due to the deep and distant locations. Whale-falls, which are thought to have habitat conditions which overlap seep ecosystems, may be used as a model system to explore questions such as the evolution of dispersal strategies and interactions between hosts and their symbiont microbes. Our discovery of whale-fall fauna at a whale carcass sunk at shelf depth in a Swedish fjord contrasts the apparent lack of specialized organisms from shallow water seep environments. Representatives of a whale-fall fauna found at the Swedish study site include bacterial mat feeding dorvilleid annelids and the whale-bone eating pogonophoran worm Osedax mucofloris Glover et al., 2005. We are maintaining whale-fall fauna alive in aquaria, and initial results from these studies suggest that O. mucofloris has a continuous reproduction life-history strategy.

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Research paper thumbnail of Marine images and movies from Remotely Operated Vehicle (ROV) - KH60, V Koster

The Marine stations at University of Gothenburg have several underwater recording facilities. One... more The Marine stations at University of Gothenburg have several underwater recording facilities. One of them is the Remotely Operated Vehicle (ROV underwater robot) at Tjärnö marine station. This data source includes image and movie files, originating from ROV underwater surveys in the region of the Koster islands and Koster national park and date back to 1993.

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Research paper thumbnail of Hermione Month 24 scientific progress report

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Research paper thumbnail of Physical oceanography at ROV station PS77/253-1, Larsen A

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Research paper thumbnail of Preliminär rapport från ROV-kartering i Rauerfjorden 06-12-18/19

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Research paper thumbnail of Sea-bottom video at ROV station PS77/253-1, Larsen-A, full length

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Research paper thumbnail of (Table 2) Uranium-series dating obtained from cold-water corals

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Research paper thumbnail of Zooplankton drive diurnal changes in oxygen concentration at Tisler cold-water coral reef

Coral Reefs, 2018

Tisler Reef is a Norwegian cold-water coral reef in the Northeastern Skagerrak, which lies at an ... more Tisler Reef is a Norwegian cold-water coral reef in the Northeastern Skagerrak, which lies at an average depth of 120 m, is constructed principally of the scleractinian coral Lophelia pertusa and hosts a dynamic and diverse ecosystem. The availability of oxygen within Tisler Reef, recorded between 2006 and 2008, showed a decline during the summer months, caused by both the isolation of the reef from the atmosphere under conditions of seasonal stratification, and the enhanced respiration in the water column during the seasonal zooplankton proliferations. Concentrations of dissolved oxygen were replenished from high-current flows advecting water from off the reef. Low current flow conditions (< 0.05 m s−1) coincided with a short-term reduction in oxygen, the extent of which varied seasonally and were observed to be greatest during July and August, coinciding with the summer Calanus proliferation in the Skagerrak. Normalized acoustic backscatter amplitude during the summer months showed a strong signal of zooplankton diurnal vertical migration, coinciding with the lowest oxygen concentrations at the reef observed during, and lagging slightly after, the deep phase of the zooplankton vertical migration. This effect was most obvious during low-flow conditions; highlighting the importance of zooplankton and associated activity as a consumer of oxygen at the reef.

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Research paper thumbnail of Food selectivity and processing by the cold-water coral <i>Lophelia pertusa</i>

Biogeosciences Discussions, 2016

Cold-water corals form prominent reef ecosystems along ocean margins that depend on suspended res... more Cold-water corals form prominent reef ecosystems along ocean margins that depend on suspended resources produced in surface waters. In this study we investigated food processing of 13C and 15N labelled bacteria and algae by the cold-water coral Lophelia pertusa. Coral respiration, tissue incorporation of C and N and metabolic-derived C incorporation into the skeleton were traced following the additions of different food concentrations (100, 300, 1300 µg C L−1) and two ratios of suspended bacterial and algal biomass (1:1, 3:1). Respiration and tissue incorporation by L. pertusa increased markedly following exposure to higher food concentrations. The net growth efficiency of L. pertusa was low (0.08 ± 0.03), which is consistent with their slow growth rates. The contribution of algae and bacteria to total coral assimilation was proportional to the food mixture in the two lowest food concentrations, but algae were preferred over bacteria as food source ...

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Research paper thumbnail of A first glimpse of the intricate interactions between a shallow cold-water coral reef (Tisler Reef Skagerrak) and its close environment as revealed by biomarkers and isotopes

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Research paper thumbnail of Seabed Mapping and Marine Spatial Planning: A Case Study from a Swedish Marine Protected Area

Marine Ecosystems, 2012

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Research paper thumbnail of The Kosterfjord Experiment, a trial to assess the interaction of a coldwater coral reef with its environment

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Research paper thumbnail of Biology of the basket star Gorgonocephalus caputmedusae (L.)

Marine Biology, 2005

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Research paper thumbnail of In-situ photographs of common Antarctic glass sponges (Porifera: Hexactinellida: Rossellidae) along 7 ROV profiles during POLARSTERN cruise PS77 (ANT-XXVII/3, CAMBIO) in the Weddell Sea

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Research paper thumbnail of Rapport om misstänkt förekomst av trålning i det trålskyddade området på kallvattenkorallrevet vid Tisler

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Research paper thumbnail of R script and data for the analysis of sponges and asteroids abundances and sponges biomass

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Research paper thumbnail of A guide to the fish associated with deep-water coral

2nd International Symposium on Deep Sea Corals, Erlangen, Germany, 2003

Search: onr:"swepub:oai:services.scigloo.org:85957" > A guide to the fish... ... McC... more Search: onr:"swepub:oai:services.scigloo.org:85957" > A guide to the fish... ... McCrea, M (author) Costello, MJ (author) Freiwald, A (author) show more... Lundälv, Tomas, 1944- (author) Göteborgs universitet, Tjärnö marinbiologiska laboratorium Jonsson, Lisbeth G., 1955- (author) Göteborgs universitet, Institutionen för marin ekologi show less... University of Gothenburg Faculty of Sciences. Department of Marine Ecology. University of Gothenburg Faculty of Sciences. Tjärnö Marine Biological Laboratory. 2003 English. In: 2nd International ...

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Research paper thumbnail of Table 3) Average mound aggradation rates

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Research paper thumbnail of Bioerosion along a bathymetric gradient in a cold-temperate setting (Kosterfjord, SW Sweden): an experimental study

Facies, 2005

... Max Wisshak · Marcos Gektidis · André Freiwald · Tomas Lundälv ... the determination of bioer... more ... Max Wisshak · Marcos Gektidis · André Freiwald · Tomas Lundälv ... the determination of bioerosion and bioaccretion rates with respect to cal-cium carbonate, and their interpretation in a bathymetric and latitudinal context as an integral part of the global car-bon cycle is the ...

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Research paper thumbnail of Role of cold-water Lophelia pertusa coral reefs as fish habitat in the NE Atlantic

Cold-Water Corals and Ecosystems, 2005

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Research paper thumbnail of Ashallow-waterwhale-fall experiment in the north Atlantic

CBM - Cahiers de Biologie Marine, 2006

The study of hydrothermal vent and seep fauna is associated with great costs due to the deep and ... more The study of hydrothermal vent and seep fauna is associated with great costs due to the deep and distant locations. Whale-falls, which are thought to have habitat conditions which overlap seep ecosystems, may be used as a model system to explore questions such as the evolution of dispersal strategies and interactions between hosts and their symbiont microbes. Our discovery of whale-fall fauna at a whale carcass sunk at shelf depth in a Swedish fjord contrasts the apparent lack of specialized organisms from shallow water seep environments. Representatives of a whale-fall fauna found at the Swedish study site include bacterial mat feeding dorvilleid annelids and the whale-bone eating pogonophoran worm Osedax mucofloris Glover et al., 2005. We are maintaining whale-fall fauna alive in aquaria, and initial results from these studies suggest that O. mucofloris has a continuous reproduction life-history strategy.

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Marine images and movies from Remotely Operated Vehicle (ROV) - KH60, V Koster

The Marine stations at University of Gothenburg have several underwater recording facilities. One... more The Marine stations at University of Gothenburg have several underwater recording facilities. One of them is the Remotely Operated Vehicle (ROV underwater robot) at Tjärnö marine station. This data source includes image and movie files, originating from ROV underwater surveys in the region of the Koster islands and Koster national park and date back to 1993.

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Research paper thumbnail of Hermione Month 24 scientific progress report

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Research paper thumbnail of Physical oceanography at ROV station PS77/253-1, Larsen A

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Research paper thumbnail of Preliminär rapport från ROV-kartering i Rauerfjorden 06-12-18/19

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Research paper thumbnail of Sea-bottom video at ROV station PS77/253-1, Larsen-A, full length

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Research paper thumbnail of (Table 2) Uranium-series dating obtained from cold-water corals

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Research paper thumbnail of Zooplankton drive diurnal changes in oxygen concentration at Tisler cold-water coral reef

Coral Reefs, 2018

Tisler Reef is a Norwegian cold-water coral reef in the Northeastern Skagerrak, which lies at an ... more Tisler Reef is a Norwegian cold-water coral reef in the Northeastern Skagerrak, which lies at an average depth of 120 m, is constructed principally of the scleractinian coral Lophelia pertusa and hosts a dynamic and diverse ecosystem. The availability of oxygen within Tisler Reef, recorded between 2006 and 2008, showed a decline during the summer months, caused by both the isolation of the reef from the atmosphere under conditions of seasonal stratification, and the enhanced respiration in the water column during the seasonal zooplankton proliferations. Concentrations of dissolved oxygen were replenished from high-current flows advecting water from off the reef. Low current flow conditions (< 0.05 m s−1) coincided with a short-term reduction in oxygen, the extent of which varied seasonally and were observed to be greatest during July and August, coinciding with the summer Calanus proliferation in the Skagerrak. Normalized acoustic backscatter amplitude during the summer months showed a strong signal of zooplankton diurnal vertical migration, coinciding with the lowest oxygen concentrations at the reef observed during, and lagging slightly after, the deep phase of the zooplankton vertical migration. This effect was most obvious during low-flow conditions; highlighting the importance of zooplankton and associated activity as a consumer of oxygen at the reef.

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Research paper thumbnail of Food selectivity and processing by the cold-water coral <i>Lophelia pertusa</i>

Biogeosciences Discussions, 2016

Cold-water corals form prominent reef ecosystems along ocean margins that depend on suspended res... more Cold-water corals form prominent reef ecosystems along ocean margins that depend on suspended resources produced in surface waters. In this study we investigated food processing of 13C and 15N labelled bacteria and algae by the cold-water coral Lophelia pertusa. Coral respiration, tissue incorporation of C and N and metabolic-derived C incorporation into the skeleton were traced following the additions of different food concentrations (100, 300, 1300 µg C L−1) and two ratios of suspended bacterial and algal biomass (1:1, 3:1). Respiration and tissue incorporation by L. pertusa increased markedly following exposure to higher food concentrations. The net growth efficiency of L. pertusa was low (0.08 ± 0.03), which is consistent with their slow growth rates. The contribution of algae and bacteria to total coral assimilation was proportional to the food mixture in the two lowest food concentrations, but algae were preferred over bacteria as food source ...

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Research paper thumbnail of A first glimpse of the intricate interactions between a shallow cold-water coral reef (Tisler Reef Skagerrak) and its close environment as revealed by biomarkers and isotopes

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Research paper thumbnail of Seabed Mapping and Marine Spatial Planning: A Case Study from a Swedish Marine Protected Area

Marine Ecosystems, 2012

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Research paper thumbnail of The Kosterfjord Experiment, a trial to assess the interaction of a coldwater coral reef with its environment

Bookmarks Related papers MentionsView impact

Research paper thumbnail of Biology of the basket star Gorgonocephalus caputmedusae (L.)

Marine Biology, 2005

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