Direct Linkage between Dimethyl Sulfide Production and Microzooplankton Grazing, Resulting from Prey Composition Change under High Partial Pressure of Carbon Dioxide Conditions

Oceanic dimethyl sulfide (DMS) is the enzymatic cleavage product of the algal metabolite dimethylsulfoniopropionate (DMSP) and is the most abundant form of sulfur released into the atmosphere. To investigate the effects of two emerging environmental threats (ocean acidification and warming) on marin...

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Bibliographic Details
Published in:Environmental Science & Technology
Main Authors: Park, KT, Lee, K, Shin, K, Yang, EJ, Hyun, B, Kim, JM, Noh, JH, Kim, M, Kong, B, Choi, DH, Choi, SJ, Jang, PG, Jeong, HJ
Other Authors: 환경공학부, 10056383
Format: Article in Journal/Newspaper
Language:English
Published: AMER CHEMICAL SOC 2014
Subjects:
OCEAN ACIDIFICATION
EMILIANIA-HUXLEYI
DIMETHYLSULFONIOPROPIONATE DMSP
PERTURBATION EXPERIMENTS
MESOCOSM EXPERIMENT
SULFUR EMISSIONS
NORTH-SEA
PHYTOPLANKTON
DIMETHYLSULPHONIOPROPIONATE
VOLUME
MESOCOSM
SULFUR
GROWTH
PERFORMANCE
Ocean acidification
Online Access:https://oasis.postech.ac.kr/handle/2014.oak/14286
https://doi.org/10.1021/ES403351H
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Summary:Oceanic dimethyl sulfide (DMS) is the enzymatic cleavage product of the algal metabolite dimethylsulfoniopropionate (DMSP) and is the most abundant form of sulfur released into the atmosphere. To investigate the effects of two emerging environmental threats (ocean acidification and warming) on marine DMS production, we performed a large-scale perturbation experiment in a coastal environment. At both ambient temperature and similar to 2 degrees C warmer, an increase in partial pressure of carbon dioxide (pCO(2)) in seawater (160-830 ppmv pCO(2)) favored the growth of large diatoms, which outcompeted other phytoplankton species in a natural phytoplankton assemblage and reduced the growth rate of smaller, DMSP-rich phototrophic dinoflagellates. This decreased the grazing rate of heterotrophic dinoflagellates (ubiquitous micrograzers), resulting in reduced DMS production via grazing activity. Both the magnitude and sign of the effect of pCO(2) on possible future oceanic DMS production were strongly linked to pCO(2)-induced alterations to the phytoplankton community and the cellular DMSP content of the dominant species and its association with micrograzers. X 1 1 16 14 scie scopus

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