Differential Responses of Calcifying and Non-Calcifying Epibionts of a Brown Macroalga to Present-Day and Future Upwelling pCO2
Seaweeds are key species of the Baltic Sea benthic ecosystems. They are the substratum of numerous fouling epibionts like bryozoans and tubeworms. Several of these epibionts bear calcified structures and could be impacted by the high pCO2 events of the late summer upwellings in the Baltic nearshores...
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Public Library of Science
2013
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Online Access: | https://oceanrep.geomar.de/id/eprint/21846/ https://oceanrep.geomar.de/id/eprint/21846/1/journal.pone.0070455.pdf http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0070455 https://doi.org/10.1371/journal.pone.0070455 |
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ftoceanrep:oai:oceanrep.geomar.de:21846 2023-05-15T17:52:04+02:00 Differential Responses of Calcifying and Non-Calcifying Epibionts of a Brown Macroalga to Present-Day and Future Upwelling pCO2 Saderne, Vincent Wahl, Martin 2013-07-23 text https://oceanrep.geomar.de/id/eprint/21846/ https://oceanrep.geomar.de/id/eprint/21846/1/journal.pone.0070455.pdf http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0070455 https://doi.org/10.1371/journal.pone.0070455 en eng Public Library of Science https://oceanrep.geomar.de/id/eprint/21846/1/journal.pone.0070455.pdf Saderne, V. and Wahl, M. (2013) Differential Responses of Calcifying and Non-Calcifying Epibionts of a Brown Macroalga to Present-Day and Future Upwelling pCO2. Open Access PLoS ONE, 8 (7). e70455. DOI 10.1371/journal.pone.0070455 <https://doi.org/10.1371/journal.pone.0070455>. doi:10.1371/journal.pone.0070455 cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed info:eu-repo/semantics/article 2013 ftoceanrep https://doi.org/10.1371/journal.pone.0070455 2023-04-07T15:10:01Z Seaweeds are key species of the Baltic Sea benthic ecosystems. They are the substratum of numerous fouling epibionts like bryozoans and tubeworms. Several of these epibionts bear calcified structures and could be impacted by the high pCO2 events of the late summer upwellings in the Baltic nearshores. Those events are expected to increase in strength and duration with global change and ocean acidification. If calcifying epibionts are impacted by transient acidification as driven by upwelling events, their increasing prevalence could cause a shift of the fouling communities toward fleshy species. The aim of the present study was to test the sensitivity of selected seaweed macrofoulers to transient elevation of pCO2 in their natural microenvironment, i.e. the boundary layer covering the thallus surface of brown seaweeds. Fragments of the macroalga Fucus serratus bearing an epibiotic community composed of the calcifiers Spirorbis spirorbis (Annelida) and Electra pilosa (Bryozoa) and the non-calcifier Alcyonidium hirsutum (Bryozoa) were maintained for 30 days under three pCO2 conditions: natural 460±59 µatm, present-day upwelling1193±166 µatm and future upwelling 3150±446 µatm. Only the highest pCO2 caused a significant reduction of growth rates and settlement of S. spirorbis individuals. Additionally, S. spirorbis settled juveniles exhibited enhanced calcification of 40% during daylight hours compared to dark hours, possibly reflecting a day-night alternation of an acidification-modulating effect by algal photosynthesis as opposed to an acidification-enhancing effect of algal respiration. E. pilosa colonies showed significantly increased growth rates at intermediate pCO2 (1193 µatm) but no response to higher pCO2. No effect of acidification on A. hirsutum colonies growth rates was observed. The results suggest a remarkable resistance of the algal macro-epibionts to levels of acidification occurring at present day upwellings in the Baltic. Only extreme future upwelling conditions impacted the tubeworm S. spirorbis, ... Article in Journal/Newspaper Ocean acidification OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) PLoS ONE 8 7 e70455 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Seaweeds are key species of the Baltic Sea benthic ecosystems. They are the substratum of numerous fouling epibionts like bryozoans and tubeworms. Several of these epibionts bear calcified structures and could be impacted by the high pCO2 events of the late summer upwellings in the Baltic nearshores. Those events are expected to increase in strength and duration with global change and ocean acidification. If calcifying epibionts are impacted by transient acidification as driven by upwelling events, their increasing prevalence could cause a shift of the fouling communities toward fleshy species. The aim of the present study was to test the sensitivity of selected seaweed macrofoulers to transient elevation of pCO2 in their natural microenvironment, i.e. the boundary layer covering the thallus surface of brown seaweeds. Fragments of the macroalga Fucus serratus bearing an epibiotic community composed of the calcifiers Spirorbis spirorbis (Annelida) and Electra pilosa (Bryozoa) and the non-calcifier Alcyonidium hirsutum (Bryozoa) were maintained for 30 days under three pCO2 conditions: natural 460±59 µatm, present-day upwelling1193±166 µatm and future upwelling 3150±446 µatm. Only the highest pCO2 caused a significant reduction of growth rates and settlement of S. spirorbis individuals. Additionally, S. spirorbis settled juveniles exhibited enhanced calcification of 40% during daylight hours compared to dark hours, possibly reflecting a day-night alternation of an acidification-modulating effect by algal photosynthesis as opposed to an acidification-enhancing effect of algal respiration. E. pilosa colonies showed significantly increased growth rates at intermediate pCO2 (1193 µatm) but no response to higher pCO2. No effect of acidification on A. hirsutum colonies growth rates was observed. The results suggest a remarkable resistance of the algal macro-epibionts to levels of acidification occurring at present day upwellings in the Baltic. Only extreme future upwelling conditions impacted the tubeworm S. spirorbis, ... |
format |
Article in Journal/Newspaper |
author |
Saderne, Vincent Wahl, Martin |
spellingShingle |
Saderne, Vincent Wahl, Martin Differential Responses of Calcifying and Non-Calcifying Epibionts of a Brown Macroalga to Present-Day and Future Upwelling pCO2 |
author_facet |
Saderne, Vincent Wahl, Martin |
author_sort |
Saderne, Vincent |
title |
Differential Responses of Calcifying and Non-Calcifying Epibionts of a Brown Macroalga to Present-Day and Future Upwelling pCO2 |
title_short |
Differential Responses of Calcifying and Non-Calcifying Epibionts of a Brown Macroalga to Present-Day and Future Upwelling pCO2 |
title_full |
Differential Responses of Calcifying and Non-Calcifying Epibionts of a Brown Macroalga to Present-Day and Future Upwelling pCO2 |
title_fullStr |
Differential Responses of Calcifying and Non-Calcifying Epibionts of a Brown Macroalga to Present-Day and Future Upwelling pCO2 |
title_full_unstemmed |
Differential Responses of Calcifying and Non-Calcifying Epibionts of a Brown Macroalga to Present-Day and Future Upwelling pCO2 |
title_sort |
differential responses of calcifying and non-calcifying epibionts of a brown macroalga to present-day and future upwelling pco2 |
publisher |
Public Library of Science |
publishDate |
2013 |
url |
https://oceanrep.geomar.de/id/eprint/21846/ https://oceanrep.geomar.de/id/eprint/21846/1/journal.pone.0070455.pdf http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0070455 https://doi.org/10.1371/journal.pone.0070455 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
https://oceanrep.geomar.de/id/eprint/21846/1/journal.pone.0070455.pdf Saderne, V. and Wahl, M. (2013) Differential Responses of Calcifying and Non-Calcifying Epibionts of a Brown Macroalga to Present-Day and Future Upwelling pCO2. Open Access PLoS ONE, 8 (7). e70455. DOI 10.1371/journal.pone.0070455 <https://doi.org/10.1371/journal.pone.0070455>. doi:10.1371/journal.pone.0070455 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0070455 |
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PLoS ONE |
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8 |
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7 |
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e70455 |
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1766159394624503808 |