Food selectivity and processing by the cold-water coral Lophelia pertusa
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 incorporat...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.865313 2024-09-09T19:51:27+00:00 Food selectivity and processing by the cold-water coral Lophelia pertusa van Oevelen, Dick Mueller, Christina E Lundälv, Tomas Middelburg, Jack J 2016 application/vnd.openxmlformats-officedocument.spreadsheetml.sheet, 47.6 kBytes https://doi.pangaea.de/10.1594/PANGAEA.865313 https://doi.org/10.1594/PANGAEA.865313 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.865313 https://doi.org/10.1594/PANGAEA.865313 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Royal Netherlands Institute for Sea Research, Texel dataset 2016 ftpangaea https://doi.org/10.1594/PANGAEA.865313 2024-07-24T02:31:33Z 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) 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 at the highest food concentration. Similarly, the stoichiometric uptake of C and N was coupled in the low and medium food treatment, but was uncoupled in the high food treatment and indicated a comparatively higher uptake or retention of bacterial carbon as compared to algal nitrogen. We argue that behavioural responses for these small-sized food particles, such as tentacle behaviour, mucus trapping and physiological processing, are more likely to explain the observed food selectivity as compared to physical-mechanical considerations. A comparison of the experimental food conditions to natural organic carbon concentrations above CWC reefs suggests that L. pertusa is well adapted to exploit temporal pulses of high organic matter concentrations in the bottom water caused by internal waves and down-welling events. Dataset Lophelia pertusa PANGAEA - Data Publisher for Earth & Environmental Science |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
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) 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 at the highest food concentration. Similarly, the stoichiometric uptake of C and N was coupled in the low and medium food treatment, but was uncoupled in the high food treatment and indicated a comparatively higher uptake or retention of bacterial carbon as compared to algal nitrogen. We argue that behavioural responses for these small-sized food particles, such as tentacle behaviour, mucus trapping and physiological processing, are more likely to explain the observed food selectivity as compared to physical-mechanical considerations. A comparison of the experimental food conditions to natural organic carbon concentrations above CWC reefs suggests that L. pertusa is well adapted to exploit temporal pulses of high organic matter concentrations in the bottom water caused by internal waves and down-welling events. |
format |
Dataset |
author |
van Oevelen, Dick Mueller, Christina E Lundälv, Tomas Middelburg, Jack J |
spellingShingle |
van Oevelen, Dick Mueller, Christina E Lundälv, Tomas Middelburg, Jack J Food selectivity and processing by the cold-water coral Lophelia pertusa |
author_facet |
van Oevelen, Dick Mueller, Christina E Lundälv, Tomas Middelburg, Jack J |
author_sort |
van Oevelen, Dick |
title |
Food selectivity and processing by the cold-water coral Lophelia pertusa |
title_short |
Food selectivity and processing by the cold-water coral Lophelia pertusa |
title_full |
Food selectivity and processing by the cold-water coral Lophelia pertusa |
title_fullStr |
Food selectivity and processing by the cold-water coral Lophelia pertusa |
title_full_unstemmed |
Food selectivity and processing by the cold-water coral Lophelia pertusa |
title_sort |
food selectivity and processing by the cold-water coral lophelia pertusa |
publisher |
PANGAEA |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.865313 https://doi.org/10.1594/PANGAEA.865313 |
genre |
Lophelia pertusa |
genre_facet |
Lophelia pertusa |
op_source |
Royal Netherlands Institute for Sea Research, Texel |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.865313 https://doi.org/10.1594/PANGAEA.865313 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.865313 |
_version_ |
1809920738463842304 |