KOSMOS 2014 mesocosm study: The influence of plankton community structure on sinking velocity and remineralization rate of marine aggregates
Gravitational sinking of photosynthetically fixed particulate organic carbon (POC) constitutes a key component of the biological carbon pump. The fraction of POC leaving the surface ocean depends on POC sinking velocity (SV) and remineralization rate (Cremin), both of which depend on plankton commun...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.902901 2023-05-15T17:51:52+02:00 KOSMOS 2014 mesocosm study: The influence of plankton community structure on sinking velocity and remineralization rate of marine aggregates Bach, Lennart Thomas LATITUDE: 27.928060 * LONGITUDE: -15.365280 * DATE/TIME START: 2014-09-27T00:00:00 * DATE/TIME END: 2015-10-18T00:00:00 2019-06-24 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.902901 https://doi.org/10.1594/PANGAEA.902901 en eng PANGAEA Taucher, Jan; Bach, Lennart Thomas (2018): KOSMOS 2014 mesocosm study: flow cytometry. PANGAEA, https://doi.org/10.1594/PANGAEA.889745 Taucher, Jan; Nauendorf, Alice (2018): KOSMOS 2014 mesocosm study: chlorophyll a. PANGAEA, https://doi.org/10.1594/PANGAEA.889731 Matlab script and test data for mesocosm model equation, Bach 2019 (URI: https://store.pangaea.de/Publications/Bach_2019/Bach-2019-Script.zip) https://doi.pangaea.de/10.1594/PANGAEA.902901 https://doi.org/10.1594/PANGAEA.902901 CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Bach, Lennart Thomas; Stange, Paul; Taucher, Jan; Achterberg, Eric Pieter; Algueró-Muñiz, Maria; Horn, H; Esposito, Mario; Riebesell, Ulf (2019): The Influence of Plankton Community Structure on Sinking Velocity and Remineralization Rate of Marine Aggregates. Global Biogeochemical Cycles, 33(8), 971-994, https://doi.org/10.1029/2019GB006256 BIOACID Biological Impacts of Ocean Acidification Dataset 2019 ftpangaea https://doi.org/10.1594/PANGAEA.902901 https://doi.org/10.1029/2019GB006256 https://doi.org/10.1594/PANGAEA.889745 https://doi.org/10.1594/PANGAEA.889731 2023-01-20T07:34:21Z Gravitational sinking of photosynthetically fixed particulate organic carbon (POC) constitutes a key component of the biological carbon pump. The fraction of POC leaving the surface ocean depends on POC sinking velocity (SV) and remineralization rate (Cremin), both of which depend on plankton community structure. However, the key drivers in plankton communities controlling SV and Cremin are poorly constrained. In fall 2014, we conducted a 6 weeks mesocosm experiment in the subtropical NE Atlantic Ocean to study the influence of plankton community structure on SV and Cremin. Oligotrophic conditions prevailed for the first 3 weeks, until nutrient‐rich deep water injected into all mesocosms stimulated diatom blooms. SV declined steadily over the course of the experiment due to decreasing CaCO3 ballast and – according to an optical proxy proposed herein – due to increasing aggregate porosity mostly during an aggregation event after the diatom bloom. Furthermore, SV was positively correlated with the contribution of picophytoplankton to the total phytoplankton biomass. Cremin was highest during a Synechococcus bloom under oligotrophic conditions and in some mesocosms during the diatom bloom after the deep‐water addition while it was particularly low during harmful algal blooms. The temporal changes were considerably larger in Cremin (max. 15‐fold) than in SV (max. 3‐fold). Accordingly, estimated POC transfer efficiency to 1000 m was mainly dependent on how the plankton community structure affected Cremin. Our approach revealed key players and interactions in the plankton food web influencing POC export efficiency thereby improving our mechanistic understanding of the biological carbon pump. Dataset Ocean acidification PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-15.365280,-15.365280,27.928060,27.928060) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
BIOACID Biological Impacts of Ocean Acidification |
spellingShingle |
BIOACID Biological Impacts of Ocean Acidification Bach, Lennart Thomas KOSMOS 2014 mesocosm study: The influence of plankton community structure on sinking velocity and remineralization rate of marine aggregates |
topic_facet |
BIOACID Biological Impacts of Ocean Acidification |
description |
Gravitational sinking of photosynthetically fixed particulate organic carbon (POC) constitutes a key component of the biological carbon pump. The fraction of POC leaving the surface ocean depends on POC sinking velocity (SV) and remineralization rate (Cremin), both of which depend on plankton community structure. However, the key drivers in plankton communities controlling SV and Cremin are poorly constrained. In fall 2014, we conducted a 6 weeks mesocosm experiment in the subtropical NE Atlantic Ocean to study the influence of plankton community structure on SV and Cremin. Oligotrophic conditions prevailed for the first 3 weeks, until nutrient‐rich deep water injected into all mesocosms stimulated diatom blooms. SV declined steadily over the course of the experiment due to decreasing CaCO3 ballast and – according to an optical proxy proposed herein – due to increasing aggregate porosity mostly during an aggregation event after the diatom bloom. Furthermore, SV was positively correlated with the contribution of picophytoplankton to the total phytoplankton biomass. Cremin was highest during a Synechococcus bloom under oligotrophic conditions and in some mesocosms during the diatom bloom after the deep‐water addition while it was particularly low during harmful algal blooms. The temporal changes were considerably larger in Cremin (max. 15‐fold) than in SV (max. 3‐fold). Accordingly, estimated POC transfer efficiency to 1000 m was mainly dependent on how the plankton community structure affected Cremin. Our approach revealed key players and interactions in the plankton food web influencing POC export efficiency thereby improving our mechanistic understanding of the biological carbon pump. |
format |
Dataset |
author |
Bach, Lennart Thomas |
author_facet |
Bach, Lennart Thomas |
author_sort |
Bach, Lennart Thomas |
title |
KOSMOS 2014 mesocosm study: The influence of plankton community structure on sinking velocity and remineralization rate of marine aggregates |
title_short |
KOSMOS 2014 mesocosm study: The influence of plankton community structure on sinking velocity and remineralization rate of marine aggregates |
title_full |
KOSMOS 2014 mesocosm study: The influence of plankton community structure on sinking velocity and remineralization rate of marine aggregates |
title_fullStr |
KOSMOS 2014 mesocosm study: The influence of plankton community structure on sinking velocity and remineralization rate of marine aggregates |
title_full_unstemmed |
KOSMOS 2014 mesocosm study: The influence of plankton community structure on sinking velocity and remineralization rate of marine aggregates |
title_sort |
kosmos 2014 mesocosm study: the influence of plankton community structure on sinking velocity and remineralization rate of marine aggregates |
publisher |
PANGAEA |
publishDate |
2019 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.902901 https://doi.org/10.1594/PANGAEA.902901 |
op_coverage |
LATITUDE: 27.928060 * LONGITUDE: -15.365280 * DATE/TIME START: 2014-09-27T00:00:00 * DATE/TIME END: 2015-10-18T00:00:00 |
long_lat |
ENVELOPE(-15.365280,-15.365280,27.928060,27.928060) |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Supplement to: Bach, Lennart Thomas; Stange, Paul; Taucher, Jan; Achterberg, Eric Pieter; Algueró-Muñiz, Maria; Horn, H; Esposito, Mario; Riebesell, Ulf (2019): The Influence of Plankton Community Structure on Sinking Velocity and Remineralization Rate of Marine Aggregates. Global Biogeochemical Cycles, 33(8), 971-994, https://doi.org/10.1029/2019GB006256 |
op_relation |
Taucher, Jan; Bach, Lennart Thomas (2018): KOSMOS 2014 mesocosm study: flow cytometry. PANGAEA, https://doi.org/10.1594/PANGAEA.889745 Taucher, Jan; Nauendorf, Alice (2018): KOSMOS 2014 mesocosm study: chlorophyll a. PANGAEA, https://doi.org/10.1594/PANGAEA.889731 Matlab script and test data for mesocosm model equation, Bach 2019 (URI: https://store.pangaea.de/Publications/Bach_2019/Bach-2019-Script.zip) https://doi.pangaea.de/10.1594/PANGAEA.902901 https://doi.org/10.1594/PANGAEA.902901 |
op_rights |
CC-BY-4.0: Creative Commons Attribution 4.0 International Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.902901 https://doi.org/10.1029/2019GB006256 https://doi.org/10.1594/PANGAEA.889745 https://doi.org/10.1594/PANGAEA.889731 |
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1766159152909910016 |