TY - JOUR
T1 - Nutrient sources, phytoplankton blooms, and hypoxia along the Chinese coast in the East China Sea
T2 - Insight from summer 2014
AU - Chen, Chung Chi
AU - Chou, Wen Chen
AU - Hung, Chin Chang
AU - Gong, Gwo Ching
N1 - Publisher Copyright:
© 2024 Elsevier Ltd
PY - 2024/8
Y1 - 2024/8
N2 - Phytoplankton blooms are common along the Chinese coast in the East China Sea, driven by various nutrient sources including river discharge, bottom water regeneration, and Kuroshio subsurface water intrusion. A notable 2014 summer bloom off the Zhejiang coast, exhibiting a Chl a concentration of 20.1 μg L−1, was significantly influenced by Changjiang River discharge, and high nutrient concentrations are often observed in the region's surface water. During blooms, primary production peaks at 1686.3 mg C m−3 d−1, indicating substantial CO2 absorption, with surface water fCO2 declining to 299.5 μatm, closely linked to plankton activities. Hypoxia often coincides with these frequent bloom occurrences, implicating marine-derived organic matter decomposition as a pivotal factor. Elevated particulate organic carbon concentrations further support this assumption, alongside increased nutrient levels, fCO2, and low pH in hypoxic waters. These findings underscore the intricate interplay between phytoplankton, nutrient cycling, and hypoxia formation, essential for effective coastal ecosystem management.
AB - Phytoplankton blooms are common along the Chinese coast in the East China Sea, driven by various nutrient sources including river discharge, bottom water regeneration, and Kuroshio subsurface water intrusion. A notable 2014 summer bloom off the Zhejiang coast, exhibiting a Chl a concentration of 20.1 μg L−1, was significantly influenced by Changjiang River discharge, and high nutrient concentrations are often observed in the region's surface water. During blooms, primary production peaks at 1686.3 mg C m−3 d−1, indicating substantial CO2 absorption, with surface water fCO2 declining to 299.5 μatm, closely linked to plankton activities. Hypoxia often coincides with these frequent bloom occurrences, implicating marine-derived organic matter decomposition as a pivotal factor. Elevated particulate organic carbon concentrations further support this assumption, alongside increased nutrient levels, fCO2, and low pH in hypoxic waters. These findings underscore the intricate interplay between phytoplankton, nutrient cycling, and hypoxia formation, essential for effective coastal ecosystem management.
KW - Dissolved inorganic nutrient
KW - Eutrophication
KW - Fugacity of CO
KW - Hypoxia
KW - Organic carbon consumption
KW - Phytoplankton blooms
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U2 - 10.1016/j.marpolbul.2024.116692
DO - 10.1016/j.marpolbul.2024.116692
M3 - Article
C2 - 38972219
AN - SCOPUS:85197579659
SN - 0025-326X
VL - 205
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
M1 - 116692
ER -