Physical-biological coupling in the Western South China sea: the response of phytoplankton community to a Mesoscale cyclonic eddy

Lei Wang, Bangqin Huang, Kuo-Ping Chiang, Xin Liu, Bingzhang Chen, Yuyuan Xie, Yanping Xu, Jianyu Hu, Minhan Dai

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

It is widely recognized that the mesoscale eddies play an important part in the biogeochemical cycle in ocean ecosystem, especially in the oligotrophic tropical zones. So here a heterogeneous cyclonic eddy in its flourishing stage was detected using remote sensing and in situ biogeochemical observation in the western South China Sea (SCS) in early September, 2007. The high-performance liquid chromatography method was used to identify the photosynthetic pigments. And the CHEMical TAXonomy (CHEMTAX) was applied to calculate the contribution of nine phytoplankton groups to the total chlorophyll a (TChl a) biomass. The deep chlorophyll a maximum layer (DCML) was raised to form a dome structure in the eddy center while there was no distinct enhancement for TChl a biomass. The integrated TChl a concentration in the upper 100 m water column was also constant from the eddy center to the surrounding water outside the eddy. However the TChl a biomass in the surface layer (at 5 m) in the eddy center was promoted 2.6-fold compared to the biomass outside the eddy (p < 0.001). Thus, the slight enhancement of TChl a biomass of euphotic zone integration within the eddy was mainly from the phytoplankton in the upper mixed zone rather than the DCML. The phytoplankton community was primarily contributed by diatoms, prasinophytes, and Synechococcus at the DCML within the eddy, while less was contributed by haptophytes-8 and Prochlorococcus. The TChl a biomass for most of the phytoplankton groups increased at the surface layer in the eddy center under the effect of nutrient pumping. The doming isopycnal within the eddy supplied nutrients gently into the upper mixing layer, and there was remarkable enhancement in phytoplankton biomass at the surface layer with 10.5% TChl a biomass of water column in eddy center and 3.7% at reference stations. So the slight increasing in the water column integrated phytoplankton biomass might be attributed to the stimulated phytoplankton biomass at the surface layer.

LanguageEnglish
Article numbere0153735
Number of pages18
JournalPLoS ONE
Volume11
Issue number4
DOIs
Publication statusPublished - 18 Apr 2016
Externally publishedYes

Fingerprint

Phytoplankton
mesoscale eddy
South China Sea
Oceans and Seas
Biomass
China
eddy
phytoplankton
chlorophyll a
chlorophyll
biomass
surface layer
Water
water column
Nutrients
Prochlorococcus
water
Haptophyta
sea
Synechococcus

Keywords

  • mesoscale eddies
  • ocean ecosystem
  • South China Sea
  • SCS
  • phytoplankton
  • modelling

Cite this

Wang, Lei ; Huang, Bangqin ; Chiang, Kuo-Ping ; Liu, Xin ; Chen, Bingzhang ; Xie, Yuyuan ; Xu, Yanping ; Hu, Jianyu ; Dai, Minhan. / Physical-biological coupling in the Western South China sea : the response of phytoplankton community to a Mesoscale cyclonic eddy. In: PLoS ONE. 2016 ; Vol. 11, No. 4.
@article{de929d712c6d4bb68cc960e149a8143a,
title = "Physical-biological coupling in the Western South China sea: the response of phytoplankton community to a Mesoscale cyclonic eddy",
abstract = "It is widely recognized that the mesoscale eddies play an important part in the biogeochemical cycle in ocean ecosystem, especially in the oligotrophic tropical zones. So here a heterogeneous cyclonic eddy in its flourishing stage was detected using remote sensing and in situ biogeochemical observation in the western South China Sea (SCS) in early September, 2007. The high-performance liquid chromatography method was used to identify the photosynthetic pigments. And the CHEMical TAXonomy (CHEMTAX) was applied to calculate the contribution of nine phytoplankton groups to the total chlorophyll a (TChl a) biomass. The deep chlorophyll a maximum layer (DCML) was raised to form a dome structure in the eddy center while there was no distinct enhancement for TChl a biomass. The integrated TChl a concentration in the upper 100 m water column was also constant from the eddy center to the surrounding water outside the eddy. However the TChl a biomass in the surface layer (at 5 m) in the eddy center was promoted 2.6-fold compared to the biomass outside the eddy (p < 0.001). Thus, the slight enhancement of TChl a biomass of euphotic zone integration within the eddy was mainly from the phytoplankton in the upper mixed zone rather than the DCML. The phytoplankton community was primarily contributed by diatoms, prasinophytes, and Synechococcus at the DCML within the eddy, while less was contributed by haptophytes-8 and Prochlorococcus. The TChl a biomass for most of the phytoplankton groups increased at the surface layer in the eddy center under the effect of nutrient pumping. The doming isopycnal within the eddy supplied nutrients gently into the upper mixing layer, and there was remarkable enhancement in phytoplankton biomass at the surface layer with 10.5{\%} TChl a biomass of water column in eddy center and 3.7{\%} at reference stations. So the slight increasing in the water column integrated phytoplankton biomass might be attributed to the stimulated phytoplankton biomass at the surface layer.",
keywords = "mesoscale eddies, ocean ecosystem, South China Sea, SCS, phytoplankton, modelling",
author = "Lei Wang and Bangqin Huang and Kuo-Ping Chiang and Xin Liu and Bingzhang Chen and Yuyuan Xie and Yanping Xu and Jianyu Hu and Minhan Dai",
year = "2016",
month = "4",
day = "18",
doi = "10.1371/journal.pone.0153735",
language = "English",
volume = "11",
journal = "PLOS One",
issn = "1932-6203",
publisher = "Public Library of Science",
number = "4",

}

Physical-biological coupling in the Western South China sea : the response of phytoplankton community to a Mesoscale cyclonic eddy. / Wang, Lei; Huang, Bangqin; Chiang, Kuo-Ping; Liu, Xin; Chen, Bingzhang; Xie, Yuyuan; Xu, Yanping; Hu, Jianyu; Dai, Minhan.

In: PLoS ONE, Vol. 11, No. 4, e0153735, 18.04.2016.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Physical-biological coupling in the Western South China sea

T2 - PLOS One

AU - Wang, Lei

AU - Huang, Bangqin

AU - Chiang, Kuo-Ping

AU - Liu, Xin

AU - Chen, Bingzhang

AU - Xie, Yuyuan

AU - Xu, Yanping

AU - Hu, Jianyu

AU - Dai, Minhan

PY - 2016/4/18

Y1 - 2016/4/18

N2 - It is widely recognized that the mesoscale eddies play an important part in the biogeochemical cycle in ocean ecosystem, especially in the oligotrophic tropical zones. So here a heterogeneous cyclonic eddy in its flourishing stage was detected using remote sensing and in situ biogeochemical observation in the western South China Sea (SCS) in early September, 2007. The high-performance liquid chromatography method was used to identify the photosynthetic pigments. And the CHEMical TAXonomy (CHEMTAX) was applied to calculate the contribution of nine phytoplankton groups to the total chlorophyll a (TChl a) biomass. The deep chlorophyll a maximum layer (DCML) was raised to form a dome structure in the eddy center while there was no distinct enhancement for TChl a biomass. The integrated TChl a concentration in the upper 100 m water column was also constant from the eddy center to the surrounding water outside the eddy. However the TChl a biomass in the surface layer (at 5 m) in the eddy center was promoted 2.6-fold compared to the biomass outside the eddy (p < 0.001). Thus, the slight enhancement of TChl a biomass of euphotic zone integration within the eddy was mainly from the phytoplankton in the upper mixed zone rather than the DCML. The phytoplankton community was primarily contributed by diatoms, prasinophytes, and Synechococcus at the DCML within the eddy, while less was contributed by haptophytes-8 and Prochlorococcus. The TChl a biomass for most of the phytoplankton groups increased at the surface layer in the eddy center under the effect of nutrient pumping. The doming isopycnal within the eddy supplied nutrients gently into the upper mixing layer, and there was remarkable enhancement in phytoplankton biomass at the surface layer with 10.5% TChl a biomass of water column in eddy center and 3.7% at reference stations. So the slight increasing in the water column integrated phytoplankton biomass might be attributed to the stimulated phytoplankton biomass at the surface layer.

AB - It is widely recognized that the mesoscale eddies play an important part in the biogeochemical cycle in ocean ecosystem, especially in the oligotrophic tropical zones. So here a heterogeneous cyclonic eddy in its flourishing stage was detected using remote sensing and in situ biogeochemical observation in the western South China Sea (SCS) in early September, 2007. The high-performance liquid chromatography method was used to identify the photosynthetic pigments. And the CHEMical TAXonomy (CHEMTAX) was applied to calculate the contribution of nine phytoplankton groups to the total chlorophyll a (TChl a) biomass. The deep chlorophyll a maximum layer (DCML) was raised to form a dome structure in the eddy center while there was no distinct enhancement for TChl a biomass. The integrated TChl a concentration in the upper 100 m water column was also constant from the eddy center to the surrounding water outside the eddy. However the TChl a biomass in the surface layer (at 5 m) in the eddy center was promoted 2.6-fold compared to the biomass outside the eddy (p < 0.001). Thus, the slight enhancement of TChl a biomass of euphotic zone integration within the eddy was mainly from the phytoplankton in the upper mixed zone rather than the DCML. The phytoplankton community was primarily contributed by diatoms, prasinophytes, and Synechococcus at the DCML within the eddy, while less was contributed by haptophytes-8 and Prochlorococcus. The TChl a biomass for most of the phytoplankton groups increased at the surface layer in the eddy center under the effect of nutrient pumping. The doming isopycnal within the eddy supplied nutrients gently into the upper mixing layer, and there was remarkable enhancement in phytoplankton biomass at the surface layer with 10.5% TChl a biomass of water column in eddy center and 3.7% at reference stations. So the slight increasing in the water column integrated phytoplankton biomass might be attributed to the stimulated phytoplankton biomass at the surface layer.

KW - mesoscale eddies

KW - ocean ecosystem

KW - South China Sea

KW - SCS

KW - phytoplankton

KW - modelling

UR - http://www.scopus.com/inward/record.url?scp=84978932814&partnerID=8YFLogxK

U2 - 10.1371/journal.pone.0153735

DO - 10.1371/journal.pone.0153735

M3 - Article

VL - 11

JO - PLOS One

JF - PLOS One

SN - 1932-6203

IS - 4

M1 - e0153735

ER -