PMID- 33244136
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20201229
LR  - 20201229
IS  - 2045-2322 (Electronic)
IS  - 2045-2322 (Linking)
VI  - 10
IP  - 1
DP  - 2020 Nov 26
TI  - Ocean acidification modifies biomolecule composition in organic matter through 
      complex interactions.
PG  - 20599
LID - 10.1038/s41598-020-77645-3 [doi]
LID - 20599
AB  - The main source of marine organic carbon (OC) is autotrophic production, while 
      heterotrophic degradation is its main sink. Increased anthropogenic CO(2) release 
      leads to ocean acidification and is expected to alter phytoplankton community 
      composition, primary production rates and bacterial degradation processes in the 
      coming decades with potential consequences for dissolved and particulate OC 
      concentration and composition. Here we investigate effects of increased pCO(2) on 
      dissolved and particulate amino acids (AA) and carbohydrates (CHO), in arctic and 
      sub-arctic planktonic communities in two large-scale mesocosm experiments. 
      Dissolved AA concentrations responded to pCO(2)/pH changes during early bloom 
      phases but did not show many changes after nutrient addition. A clear positive 
      correlation in particulate AA was detected in post-bloom phases. Direct responses 
      in CHO concentrations to changing pCO(2)/pH were lacking, suggesting that 
      observed changes were rather indirect and dependent on the phytoplankton 
      community composition. The relative composition of AA and CHO did not change as a 
      direct consequence of pCO(2) increase. Changes between bloom phases were 
      associated with the prevailing nutrient status. Our results suggest that 
      biomolecule composition will change under future ocean conditions but responses 
      are highly complex, and seem to be dependent on many factors including bloom 
      phase and sampling site.
FAU - Grosse, Julia
AU  - Grosse J
AD  - Department of Biological Oceanography, GEOMAR Helmholtz Centre for Ocean Research 
      Kiel, Kiel, Germany. jgrosse@geomar.de.
FAU - Endres, Sonja
AU  - Endres S
AD  - Department of Biological Oceanography, GEOMAR Helmholtz Centre for Ocean Research 
      Kiel, Kiel, Germany.
FAU - Engel, Anja
AU  - Engel A
AD  - Department of Biological Oceanography, GEOMAR Helmholtz Centre for Ocean Research 
      Kiel, Kiel, Germany.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20201126
PL  - England
TA  - Sci Rep
JT  - Scientific reports
JID - 101563288
SB  - IM
PMC - PMC7692504
COIS- The authors declare no competing interests.
EDAT- 2020/11/28 06:00
MHDA- 2020/11/28 06:01
PMCR- 2020/11/26
CRDT- 2020/11/27 05:43
PHST- 2019/11/12 00:00 [received]
PHST- 2020/11/12 00:00 [accepted]
PHST- 2020/11/27 05:43 [entrez]
PHST- 2020/11/28 06:00 [pubmed]
PHST- 2020/11/28 06:01 [medline]
PHST- 2020/11/26 00:00 [pmc-release]
AID - 10.1038/s41598-020-77645-3 [pii]
AID - 77645 [pii]
AID - 10.1038/s41598-020-77645-3 [doi]
PST - epublish
SO  - Sci Rep. 2020 Nov 26;10(1):20599. doi: 10.1038/s41598-020-77645-3.