Temperature effects on respiration and photosynthesis in three diatom-dominated benthic communities
Short-term temperature effects on respiration and photosynthesis were investigated in intact diatom-dominated benthic communities, collected at 2 temperate and 1 high-arctic subtidal sites. Areal rates of total (TOE) and diffusive (DOE) O-2 exchange were determined from O-2-microsensor measurements...
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ftuhipublicatio:oai:pure.atira.dk:publications/93094e38-35ca-4bcc-86a8-cdefa3ec640b 2024-06-23T07:50:54+00:00 Temperature effects on respiration and photosynthesis in three diatom-dominated benthic communities Hancke, K Glud, Ronnie 2004 https://pure.uhi.ac.uk/en/publications/93094e38-35ca-4bcc-86a8-cdefa3ec640b https://doi.org/10.3354/ame037265 eng eng https://pure.uhi.ac.uk/en/publications/93094e38-35ca-4bcc-86a8-cdefa3ec640b info:eu-repo/semantics/restrictedAccess Hancke , K & Glud , R 2004 , ' Temperature effects on respiration and photosynthesis in three diatom-dominated benthic communities ' , AQUAT MICROB ECOL , vol. 37 , no. 3 , pp. 265-281 . https://doi.org/10.3354/ame037265 Marine & Freshwater Biology Ecology DEPENDENCE WATER HIGH SPATIAL-RESOLUTION Microbiology COUPLED RESPIRATION INTERTIDAL MICROPHYTOBENTHOS OXYGEN MICROPROFILE CONSUMPTION SEDIMENTS LIGHT MICROALGAE article 2004 ftuhipublicatio https://doi.org/10.3354/ame037265 2024-06-03T23:48:37Z Short-term temperature effects on respiration and photosynthesis were investigated in intact diatom-dominated benthic communities, collected at 2 temperate and 1 high-arctic subtidal sites. Areal rates of total (TOE) and diffusive (DOE) O-2 exchange were determined from O-2-microsensor measurements in intact sediment cores in the temperature range from 0 to 24degreesC in darkness and at 140 mumol photons m(-2) s(-1). In darkness, the O-2 Consumption increased exponentially with increasing temperature for both TOE and DOE, and no optimum temperature was observed within the applied temperature range. Q(10) was calculated from the linear slope in Arrhenius plots and ranged between 1.7 and 3.3 at the respective sites. The volume-specific rate (R-dark,R-vol) solely representing the biological temperature response was somewhat stronger, with Q(10) values of 2.6 to 5.2. The Q(10) values were overall not correlated to the in situ water temperature or geographical position. Accordingly, no difference in the temperature acclimation or adaptation strategy of the microbial community was observed. Slurred oxic sediment samples showed a Q10 of 1.7 and were, hence, lower than estimates based on intact sediment core measurements. This can be ascribed to changes in physical and biological controls during resuspension. Gross photosynthesis was measured with the light-dark shift method at the 2 temperate sites. Both areal (P-gross) and volumetric (P-gross,P-vol) rates increased with temperature to an optimum temperature at 12 and 15degreesC, with a Q(10) for P-gross of 2.2 and 2.6 for the 2 sites, respectively. The gross photosynthesis response could be categorised as psychrotrophic for both sites and no temperature adaptation was observed between the 2 sites. Our measurements document that temperature stimulates heterotrophic activity more than gross photosynthesis, and that the benthic communities gradually become heterotrophic with increasing temperature. This has implications for C-cycling in shallow water communities ... Article in Journal/Newspaper Arctic University of the Highlands and Islands: Research Database of UHI Arctic Aquatic Microbial Ecology 37 265 281 |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
Marine & Freshwater Biology Ecology DEPENDENCE WATER HIGH SPATIAL-RESOLUTION Microbiology COUPLED RESPIRATION INTERTIDAL MICROPHYTOBENTHOS OXYGEN MICROPROFILE CONSUMPTION SEDIMENTS LIGHT MICROALGAE |
spellingShingle |
Marine & Freshwater Biology Ecology DEPENDENCE WATER HIGH SPATIAL-RESOLUTION Microbiology COUPLED RESPIRATION INTERTIDAL MICROPHYTOBENTHOS OXYGEN MICROPROFILE CONSUMPTION SEDIMENTS LIGHT MICROALGAE Hancke, K Glud, Ronnie Temperature effects on respiration and photosynthesis in three diatom-dominated benthic communities |
topic_facet |
Marine & Freshwater Biology Ecology DEPENDENCE WATER HIGH SPATIAL-RESOLUTION Microbiology COUPLED RESPIRATION INTERTIDAL MICROPHYTOBENTHOS OXYGEN MICROPROFILE CONSUMPTION SEDIMENTS LIGHT MICROALGAE |
description |
Short-term temperature effects on respiration and photosynthesis were investigated in intact diatom-dominated benthic communities, collected at 2 temperate and 1 high-arctic subtidal sites. Areal rates of total (TOE) and diffusive (DOE) O-2 exchange were determined from O-2-microsensor measurements in intact sediment cores in the temperature range from 0 to 24degreesC in darkness and at 140 mumol photons m(-2) s(-1). In darkness, the O-2 Consumption increased exponentially with increasing temperature for both TOE and DOE, and no optimum temperature was observed within the applied temperature range. Q(10) was calculated from the linear slope in Arrhenius plots and ranged between 1.7 and 3.3 at the respective sites. The volume-specific rate (R-dark,R-vol) solely representing the biological temperature response was somewhat stronger, with Q(10) values of 2.6 to 5.2. The Q(10) values were overall not correlated to the in situ water temperature or geographical position. Accordingly, no difference in the temperature acclimation or adaptation strategy of the microbial community was observed. Slurred oxic sediment samples showed a Q10 of 1.7 and were, hence, lower than estimates based on intact sediment core measurements. This can be ascribed to changes in physical and biological controls during resuspension. Gross photosynthesis was measured with the light-dark shift method at the 2 temperate sites. Both areal (P-gross) and volumetric (P-gross,P-vol) rates increased with temperature to an optimum temperature at 12 and 15degreesC, with a Q(10) for P-gross of 2.2 and 2.6 for the 2 sites, respectively. The gross photosynthesis response could be categorised as psychrotrophic for both sites and no temperature adaptation was observed between the 2 sites. Our measurements document that temperature stimulates heterotrophic activity more than gross photosynthesis, and that the benthic communities gradually become heterotrophic with increasing temperature. This has implications for C-cycling in shallow water communities ... |
format |
Article in Journal/Newspaper |
author |
Hancke, K Glud, Ronnie |
author_facet |
Hancke, K Glud, Ronnie |
author_sort |
Hancke, K |
title |
Temperature effects on respiration and photosynthesis in three diatom-dominated benthic communities |
title_short |
Temperature effects on respiration and photosynthesis in three diatom-dominated benthic communities |
title_full |
Temperature effects on respiration and photosynthesis in three diatom-dominated benthic communities |
title_fullStr |
Temperature effects on respiration and photosynthesis in three diatom-dominated benthic communities |
title_full_unstemmed |
Temperature effects on respiration and photosynthesis in three diatom-dominated benthic communities |
title_sort |
temperature effects on respiration and photosynthesis in three diatom-dominated benthic communities |
publishDate |
2004 |
url |
https://pure.uhi.ac.uk/en/publications/93094e38-35ca-4bcc-86a8-cdefa3ec640b https://doi.org/10.3354/ame037265 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Hancke , K & Glud , R 2004 , ' Temperature effects on respiration and photosynthesis in three diatom-dominated benthic communities ' , AQUAT MICROB ECOL , vol. 37 , no. 3 , pp. 265-281 . https://doi.org/10.3354/ame037265 |
op_relation |
https://pure.uhi.ac.uk/en/publications/93094e38-35ca-4bcc-86a8-cdefa3ec640b |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.3354/ame037265 |
container_title |
Aquatic Microbial Ecology |
container_volume |
37 |
container_start_page |
265 |
op_container_end_page |
281 |
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1802641848876924928 |