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Paul, Carolin; Sommer, Ulrich; Matthiessen, Birte (2021): Phytoplankton carbon related biomass of each species/ taxa or group of indoor mesocosm experiment 2014. PANGAEA, https://doi.org/10.1594/PANGAEA.939012, In: Paul, C et al. (2021): Composition and dominance of edible and inedible phyto-plankton predict responses of Baltic Sea summer communities to elevated temperature and CO2. PANGAEA, https://doi.org/10.1594/PANGAEA.939015

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Abstract:
Previous studies with Baltic Sea phytoplankton combining elevated seawater temperature with CO2 revealed the importance of size trait-based analyses, in particular dividing the plankton in-to edible (> 5 and < 100 µm) and inedible (< 5 and > 100 µm) size classes for mesozoopankton grazers. While the edible phytoplankton responded predominantly negative to warming and the inedible group stayed unaffected or increased, independent from edibility most phyto-plankton groups gained from CO2. Because the ratio between edible and inedible taxa changes profoundly over seasons, we investigated, if community responses can be predicted according to the prevailing composition of edible and inedible groups. We experimentally explored the combined effects of elevated temperatures and CO2 concentrations on a late-summer Baltic Sea community. Total phytoplankton significantly increased in response to elevated CO2 in particu-lar in combination with temperature, driven by a significant gain of the inedible < 5 µm fraction and large filamentous cyanobacteria. Large flagellates disappeared. The edible group was low as usual in summer and decreased with both factors due to enhanced copepod grazing and overall decline of small flagellates. Our results emphasize that the responses of summer communities are complex, but can be predicted by the composition and dominance of size classes and groups.
Keyword(s):
Baltic Sea; Climate change; CO2; grazing; Phytoplankton; warming
Further details:
Paul, Carolin; Sommer, Ulrich; Matthiessen, Birte (2021): Materials and Methods BIOACID indoor mesocosm Experiment 2014.
Coverage:
Latitude: 54.333000 * Longitude: 10.133000
Date/Time Start: 2014-09-01T00:00:00 * Date/Time End: 2014-09-26T00:00:00
Event(s):
Kiel_Bight_2014 * Latitude: 54.333000 * Longitude: 10.133000 * Date/Time Start: 2014-09-01T00:00:00 * Date/Time End: 2014-09-26T00:00:00 * Method/Device: Mesocosm experiment (MESO) * Comment: The mesocosms contained the natural Baltic Sea late summer plankton community from Kiel Fjord (54◦20_N and 10◦8_E; September 1st 2014 - September 26th 2014).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DATE/TIMEDate/TimePaul, CarolinGeocode
2Day of experimentDOEdayPaul, Carolin
3Mesocosm labelMeso labelPaul, Carolin
4Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, CarolinDitylim brightwselli
5Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, CarolinTeleaulax
6Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, CarolinTripos longissimus
7Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, CarolinTripos muelleri
8Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, CarolinDinophysis sp.
9Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, CarolinProrocentrum micans
10Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, CarolinProrocentrum cordatum
11Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, CarolinNodularia spumigena
12Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, CarolinDolichospermum sp.
13Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, Carolinpico-cyanobacteria
14Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, Carolinphytoplankton < 5µm
15Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, Carolintotal phyto C
16Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, Carolinedible phytoplankton C
17Phytoplankton, biomass as carbonPhytopl Cµg/lPaul, Carolininedible phytoplankton C
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2304 data points

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