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...
Published in: | PLoS ONE |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Public Library of Science (PLoS)
2013
|
Subjects: | |
Online Access: | https://doi.org/10.1371/journal.pone.0070455 https://doaj.org/article/111e9aadf576417295e334732066825a |
id |
ftdoajarticles:oai:doaj.org/article:111e9aadf576417295e334732066825a |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:111e9aadf576417295e334732066825a 2023-05-15T17:51:56+02:00 Differential responses of calcifying and non-calcifying epibionts of a brown macroalga to present-day and future upwelling pCO2. Vincent Saderne Martin Wahl 2013-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0070455 https://doaj.org/article/111e9aadf576417295e334732066825a EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC3720911?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0070455 https://doaj.org/article/111e9aadf576417295e334732066825a PLoS ONE, Vol 8, Iss 7, p e70455 (2013) Medicine R Science Q article 2013 ftdoajarticles https://doi.org/10.1371/journal.pone.0070455 2022-12-31T06:30:29Z 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. ... Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles PLoS ONE 8 7 e70455 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Vincent Saderne Martin Wahl Differential responses of calcifying and non-calcifying epibionts of a brown macroalga to present-day and future upwelling pCO2. |
topic_facet |
Medicine R Science Q |
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. ... |
format |
Article in Journal/Newspaper |
author |
Vincent Saderne Martin Wahl |
author_facet |
Vincent Saderne Martin Wahl |
author_sort |
Vincent Saderne |
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 (PLoS) |
publishDate |
2013 |
url |
https://doi.org/10.1371/journal.pone.0070455 https://doaj.org/article/111e9aadf576417295e334732066825a |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
PLoS ONE, Vol 8, Iss 7, p e70455 (2013) |
op_relation |
http://europepmc.org/articles/PMC3720911?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0070455 https://doaj.org/article/111e9aadf576417295e334732066825a |
op_doi |
https://doi.org/10.1371/journal.pone.0070455 |
container_title |
PLoS ONE |
container_volume |
8 |
container_issue |
7 |
container_start_page |
e70455 |
_version_ |
1766159231283625984 |