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Community barcoding reveals little effect of ocean acidification on the composition of coastal plankton communities: Evidence from a long-term mesocosm study in the Gullmar Fjord, Skagerrak

Community barcoding reveals little effect of ocean acidification on the composition of coastal plankton communities: Evidence from a long-term mesocosm study in the Gullmar Fjord, Skagerrak
Community barcoding reveals little effect of ocean acidification on the composition of coastal plankton communities: Evidence from a long-term mesocosm study in the Gullmar Fjord, Skagerrak
The acidification of the oceans could potentially alter marine plankton communities with consequences for ecosystem functioning. While several studies have investigated effects of ocean acidification on communities using traditional methods, few have used genetic analyses. Here, we use community barcoding to assess the impact of ocean acidification on the composition of a coastal plankton community in a large scale, in situ, long-term mesocosm experiment. High-throughput sequencing resulted in the identification of a wide range of planktonic taxa (Alveolata, Cryptophyta, Haptophyceae, Fungi, Metazoa, Hydrozoa, Rhizaria, Straminipila, Chlorophyta). Analyses based on predicted operational taxonomical units as well as taxonomical compositions revealed no differences between communities in high CO2 mesocosms (~ 760 μatm) and those exposed to present-day CO2 conditions. Observed shifts in the planktonic community composition were mainly related to seasonal changes in temperature and nutrients. Furthermore, based on our investigations, the elevated CO2 did not affect the intraspecific diversity of the most common mesozooplankter, the calanoid copepod Pseudocalanus acuspes. Nevertheless, accompanying studies found temporary effects attributed to a raise in CO2. Differences in taxa composition between the CO2 treatments could, however, only be observed in a specific period of the experiment. Based on our genetic investigations, no compositional long-term shifts of the plankton communities exposed to elevated CO2 conditions were observed. Thus, we conclude that the compositions of planktonic communities, especially those in coastal areas, remain rather unaffected by increased CO2.
1932-6203
Langer, Julia A. F.
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Sharma, Rahul
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Schmidt, Susanne I.
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Bahrdt, Sebastian
f3d474f4-4ca1-4a98-8e04-0cefbb6ad2bc
Horn, Henriette G.
4f42fa7e-fb65-42dc-ac45-abd2304b54da
Algueró-muñiz, María
0682c9a4-6c70-41e7-8445-b08a4580510f
Nam, Bora
91db37f2-bb06-4ec4-86f5-9bd3d60f8906
Achterberg, Eric P.
685ce961-8c45-4503-9f03-50f6561202b9
Riebesell, Ulf
2218bcf4-b444-4a1a-b268-9875762de458
Boersma, Maarten
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Thines, Marco
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Schwenk, Klaus
9f4e50f4-247b-44e5-b3fc-5eea6e18ab06
Langer, Julia A. F.
36bd3464-ac33-4ac1-85cc-81946ba55774
Sharma, Rahul
76683c23-736b-450c-9c4e-2d18726c4b63
Schmidt, Susanne I.
d0da54f9-d05a-4821-ad8a-946264b712f5
Bahrdt, Sebastian
f3d474f4-4ca1-4a98-8e04-0cefbb6ad2bc
Horn, Henriette G.
4f42fa7e-fb65-42dc-ac45-abd2304b54da
Algueró-muñiz, María
0682c9a4-6c70-41e7-8445-b08a4580510f
Nam, Bora
91db37f2-bb06-4ec4-86f5-9bd3d60f8906
Achterberg, Eric P.
685ce961-8c45-4503-9f03-50f6561202b9
Riebesell, Ulf
2218bcf4-b444-4a1a-b268-9875762de458
Boersma, Maarten
65832bdb-120e-439f-8aff-a16eddfa1705
Thines, Marco
088b2777-b1a4-4ac6-9df3-2a490c1792df
Schwenk, Klaus
9f4e50f4-247b-44e5-b3fc-5eea6e18ab06

Langer, Julia A. F., Sharma, Rahul, Schmidt, Susanne I., Bahrdt, Sebastian, Horn, Henriette G., Algueró-muñiz, María, Nam, Bora, Achterberg, Eric P., Riebesell, Ulf, Boersma, Maarten, Thines, Marco and Schwenk, Klaus (2017) Community barcoding reveals little effect of ocean acidification on the composition of coastal plankton communities: Evidence from a long-term mesocosm study in the Gullmar Fjord, Skagerrak. PLoS ONE, 12 (4). (doi:10.1371/journal.pone.0175808).

Record type: Article

Abstract

The acidification of the oceans could potentially alter marine plankton communities with consequences for ecosystem functioning. While several studies have investigated effects of ocean acidification on communities using traditional methods, few have used genetic analyses. Here, we use community barcoding to assess the impact of ocean acidification on the composition of a coastal plankton community in a large scale, in situ, long-term mesocosm experiment. High-throughput sequencing resulted in the identification of a wide range of planktonic taxa (Alveolata, Cryptophyta, Haptophyceae, Fungi, Metazoa, Hydrozoa, Rhizaria, Straminipila, Chlorophyta). Analyses based on predicted operational taxonomical units as well as taxonomical compositions revealed no differences between communities in high CO2 mesocosms (~ 760 μatm) and those exposed to present-day CO2 conditions. Observed shifts in the planktonic community composition were mainly related to seasonal changes in temperature and nutrients. Furthermore, based on our investigations, the elevated CO2 did not affect the intraspecific diversity of the most common mesozooplankter, the calanoid copepod Pseudocalanus acuspes. Nevertheless, accompanying studies found temporary effects attributed to a raise in CO2. Differences in taxa composition between the CO2 treatments could, however, only be observed in a specific period of the experiment. Based on our genetic investigations, no compositional long-term shifts of the plankton communities exposed to elevated CO2 conditions were observed. Thus, we conclude that the compositions of planktonic communities, especially those in coastal areas, remain rather unaffected by increased CO2.

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Accepted/In Press date: 1 April 2017
e-pub ahead of print date: 26 April 2017
Organisations: Ocean and Earth Science, Marine Biogeochemistry

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Local EPrints ID: 410644
URI: https://eprints.soton.ac.uk/id/eprint/410644
ISSN: 1932-6203
PURE UUID: 517ee05e-4ec2-48e5-b908-1d24e5a0ed6e

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Date deposited: 09 Jun 2017 09:17
Last modified: 02 Dec 2019 19:09

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Contributors

Author: Julia A. F. Langer
Author: Rahul Sharma
Author: Susanne I. Schmidt
Author: Sebastian Bahrdt
Author: Henriette G. Horn
Author: María Algueró-muñiz
Author: Bora Nam
Author: Ulf Riebesell
Author: Maarten Boersma
Author: Marco Thines
Author: Klaus Schwenk

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