The Effects of Ocean Acidification and Warming on Growth of a Natural Community of Coastal Phytoplankton

An in situ mesocosm experiment was performed to investigate the combined effects of ocean acidification and warming on the coastal phytoplankton standing stock and species composition of a eutrophic coastal area in the temperate-subtropical region. Experimental treatments of natural seawater include...

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Bibliographic Details
Published in:Journal of Marine Science and Engineering
Main Authors: Hyun, Bonggil, KIM, JA MYUNG, Jang, Pung-Guk, Jang, Min-Chul, Choi, Keun-Hyung, LEE, KITACK, Yang, Eun Jin, Noh, Jae Hoon, Shin, Kyoungsoon
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2020
Subjects:
CARBONIC-ACID
DISSOCIATION-CONSTANTS
CLIMATE-CHANGE
CO2
TEMPERATURE
SEAWATER
PERTURBATION
PCO(2)
mesocosm
acidification
warming
picophytoplankton
autotrophic nanoflagellates
diatoms
dinoflagellates
Carbonic acid
Ocean acidification
Online Access:https://oasis.postech.ac.kr/handle/2014.oak/104543
https://doi.org/10.3390/jmse8100821
Description
Summary:An in situ mesocosm experiment was performed to investigate the combined effects of ocean acidification and warming on the coastal phytoplankton standing stock and species composition of a eutrophic coastal area in the temperate-subtropical region. Experimental treatments of natural seawater included three CO2 and two temperature conditions (present control: similar to 400 mu atm CO2 and ambient temperature, acidification conditions: similar to 900 mu atm CO2 and ambient temperature, and greenhouse conditions: similar to 900 mu atm CO2 and ambient temperature +3 degrees C). We found that increased CO2 concentration benefited the growth of small autotrophic phytoplankton groups: picophytoplankton (PP), autotrophic nanoflagellates (ANF), and small chain-forming diatoms (DT). However, in the greenhouse conditions, ANF and DT abundances were lower compared with those in the acidification conditions. The proliferation of small autotrophic phytoplankton in future oceanic conditions (acidification and greenhouse) also increased the abundance of heterotrophic dinoflagellates (HDF). These responses suggest that a combination of acidification and warming will not only increase the small autotrophic phytoplankton standing stock but, also, lead to a shift in the diatom and dinoflagellate species composition, with potential biogeochemical element cycling feedback and an increased frequency and intensity of harmful algal blooms. 1 1 Y scie scopus

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