Ciliate and mesozooplankton community response to increasing CO 2 levels in the Baltic Sea: insights from a large-scale mesocosm experiment
Community approaches to investigating ocean acidification (OA) effects suggest a high tolerance of micro- and mesozooplankton to carbonate chemistry changes expected to occur within this century. Plankton communities in the coastal areas of the Baltic Sea frequently experience pH variations partly e...
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ftunivtasecite:oai:ecite.utas.edu.au:133655 2023-05-15T17:52:08+02:00 Ciliate and mesozooplankton community response to increasing CO 2 levels in the Baltic Sea: insights from a large-scale mesocosm experiment Lischka, S Bach, LT Schulz, K-G Riebesell, U 2017 application/pdf https://doi.org/10.5194/bg-14-447-2017 http://ecite.utas.edu.au/133655 en eng Copernicus GmbH http://ecite.utas.edu.au/133655/1/133655 - Ciliate and mesozooplankton community response to increasing CO2 levels.pdf http://dx.doi.org/10.5194/bg-14-447-2017 Lischka, S and Bach, LT and Schulz, K-G and Riebesell, U, Ciliate and mesozooplankton community response to increasing CO 2 levels in the Baltic Sea: insights from a large-scale mesocosm experiment, Biogeosciences, 14 pp. 447-466. ISSN 1726-4170 (2017) [Refereed Article] http://ecite.utas.edu.au/133655 Earth Sciences Oceanography Biological Oceanography Refereed Article PeerReviewed 2017 ftunivtasecite https://doi.org/10.5194/bg-14-447-2017 2019-12-13T22:31:25Z Community approaches to investigating ocean acidification (OA) effects suggest a high tolerance of micro- and mesozooplankton to carbonate chemistry changes expected to occur within this century. Plankton communities in the coastal areas of the Baltic Sea frequently experience pH variations partly exceeding projections for the near future both on a diurnal and seasonal basis. We conducted a large-scale mesocosm CO 2 enrichment experiment ( ∼ 55 m 3 ) enclosing the natural plankton community in TvrminneStorfjrden for 8weeks during JuneAugust2012 and studied community and speciestaxon response of ciliates and mesozooplankton to CO 2 elevations expected for this century. In addition to the response to f CO 2 , we also considered temperature and chlorophyll a variations in our analyses. Shannon diversity of ciliates significantly decreased with f CO 2 and temperature with a greater dominance of smaller species. The mixotrophic Myrionecta rubra seemed to indirectly and directly benefit from higher CO 2 concentrations in the post-bloom phase through increased occurrence of picoeukaryotes (most likely Cryptophytes) and Dinophyta at higher CO 2 levels. With respect to mesozooplankton, we did not detect significant effects for either total abundance or for Shannon diversity. The cladocera Bosmina sp. occurred at distinctly higher abundance for a short time period during the second half of the experiment in three of the CO 2 -enriched mesocosms except for the highest CO 2 level. The ratio of Bosmina sp. with empty to embryo- or resting-egg-bearing brood chambers, however, was significantly affected by CO 2 , temperature, and chlorophyll a . An indirect CO 2 effect via increased food availability (Cyanobacteria) stimulating Bosmina sp. reproduction cannot be ruled out. Although increased regenerated primary production diminishes trophic transfer in general, the presence of organisms able to graze on bacteria such as cladocerans may positively impact organic matter transfer to higher trophic levels. Thus, under increasing OA in cladoceran-dominated mesozooplankton communities, the importance of the microbial loop in the pelagic zone may be temporarily enhanced and carbon transfer to higher trophic levels may be stimulated. Article in Journal/Newspaper Ocean acidification eCite UTAS (University of Tasmania) Biogeosciences 14 2 447 466 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Biological Oceanography |
spellingShingle |
Earth Sciences Oceanography Biological Oceanography Lischka, S Bach, LT Schulz, K-G Riebesell, U Ciliate and mesozooplankton community response to increasing CO 2 levels in the Baltic Sea: insights from a large-scale mesocosm experiment |
topic_facet |
Earth Sciences Oceanography Biological Oceanography |
description |
Community approaches to investigating ocean acidification (OA) effects suggest a high tolerance of micro- and mesozooplankton to carbonate chemistry changes expected to occur within this century. Plankton communities in the coastal areas of the Baltic Sea frequently experience pH variations partly exceeding projections for the near future both on a diurnal and seasonal basis. We conducted a large-scale mesocosm CO 2 enrichment experiment ( ∼ 55 m 3 ) enclosing the natural plankton community in TvrminneStorfjrden for 8weeks during JuneAugust2012 and studied community and speciestaxon response of ciliates and mesozooplankton to CO 2 elevations expected for this century. In addition to the response to f CO 2 , we also considered temperature and chlorophyll a variations in our analyses. Shannon diversity of ciliates significantly decreased with f CO 2 and temperature with a greater dominance of smaller species. The mixotrophic Myrionecta rubra seemed to indirectly and directly benefit from higher CO 2 concentrations in the post-bloom phase through increased occurrence of picoeukaryotes (most likely Cryptophytes) and Dinophyta at higher CO 2 levels. With respect to mesozooplankton, we did not detect significant effects for either total abundance or for Shannon diversity. The cladocera Bosmina sp. occurred at distinctly higher abundance for a short time period during the second half of the experiment in three of the CO 2 -enriched mesocosms except for the highest CO 2 level. The ratio of Bosmina sp. with empty to embryo- or resting-egg-bearing brood chambers, however, was significantly affected by CO 2 , temperature, and chlorophyll a . An indirect CO 2 effect via increased food availability (Cyanobacteria) stimulating Bosmina sp. reproduction cannot be ruled out. Although increased regenerated primary production diminishes trophic transfer in general, the presence of organisms able to graze on bacteria such as cladocerans may positively impact organic matter transfer to higher trophic levels. Thus, under increasing OA in cladoceran-dominated mesozooplankton communities, the importance of the microbial loop in the pelagic zone may be temporarily enhanced and carbon transfer to higher trophic levels may be stimulated. |
format |
Article in Journal/Newspaper |
author |
Lischka, S Bach, LT Schulz, K-G Riebesell, U |
author_facet |
Lischka, S Bach, LT Schulz, K-G Riebesell, U |
author_sort |
Lischka, S |
title |
Ciliate and mesozooplankton community response to increasing CO 2 levels in the Baltic Sea: insights from a large-scale mesocosm experiment |
title_short |
Ciliate and mesozooplankton community response to increasing CO 2 levels in the Baltic Sea: insights from a large-scale mesocosm experiment |
title_full |
Ciliate and mesozooplankton community response to increasing CO 2 levels in the Baltic Sea: insights from a large-scale mesocosm experiment |
title_fullStr |
Ciliate and mesozooplankton community response to increasing CO 2 levels in the Baltic Sea: insights from a large-scale mesocosm experiment |
title_full_unstemmed |
Ciliate and mesozooplankton community response to increasing CO 2 levels in the Baltic Sea: insights from a large-scale mesocosm experiment |
title_sort |
ciliate and mesozooplankton community response to increasing co 2 levels in the baltic sea: insights from a large-scale mesocosm experiment |
publisher |
Copernicus GmbH |
publishDate |
2017 |
url |
https://doi.org/10.5194/bg-14-447-2017 http://ecite.utas.edu.au/133655 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://ecite.utas.edu.au/133655/1/133655 - Ciliate and mesozooplankton community response to increasing CO2 levels.pdf http://dx.doi.org/10.5194/bg-14-447-2017 Lischka, S and Bach, LT and Schulz, K-G and Riebesell, U, Ciliate and mesozooplankton community response to increasing CO 2 levels in the Baltic Sea: insights from a large-scale mesocosm experiment, Biogeosciences, 14 pp. 447-466. ISSN 1726-4170 (2017) [Refereed Article] http://ecite.utas.edu.au/133655 |
op_doi |
https://doi.org/10.5194/bg-14-447-2017 |
container_title |
Biogeosciences |
container_volume |
14 |
container_issue |
2 |
container_start_page |
447 |
op_container_end_page |
466 |
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1766159478733930496 |