Environmental drivers of phytoplankton crops and taxonomic composition in northeastern Antarctic Peninsula adjacent sea area

The ecosystem of the sea region adjacent to the Antarctic Peninsula is undergoing remarkable physical and biological changes, in the context of global warming. However, understanding of the dynamics of phytoplankton taxonomic composition in this marginal ice zone remains unclear. In this study, seaw...

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Bibliographic Details
Published in:Acta oceanologica Sinica 2022, Vol.41 (1), p.99-117
Main Authors: Feng, Yubin, Li, Dong, Zhao, Jun, Han, Zhengbing, Pan, Jianming, Fan, Gaojing, Zhang, Haisheng, Hu, Ji, Zhang, Haifeng, Wu, Jiaqi, Zhu, Qiuhong
Format: Article
Language:English
Subjects:
Bacillariophyceae
Chemical analysis
Chlorophyll
Chlorophyll a
Climate change
Climatology
Coastal zone
Composition
Crops
Cyanobacteria
Diatoms
Dinoflagellates
Dynamics
Earth and Environmental Science
Earth Sciences
Ecology
Engineering Fluid Dynamics
Environmental Chemistry
Flagellates
Functional groups
Global warming
Ice melting
Light levels
Marine & Freshwater Sciences
Marine ecosystems
Marine environment
Marine microorganisms
Meltwater
Mineral nutrients
Mixed layer
Mixed layer depth
Nutrient concentrations
Nutrients
Oceanography
Offshore
Photosynthetically active radiation
Phytoplankton
Pigments
Plankton
Radiant flux density
Remote sensing
Sea ice
Seawater
Stratification
Taxonomy
Water analysis
Water circulation
Water column
Water depth
Water masses
Water stratification
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Summary:The ecosystem of the sea region adjacent to the Antarctic Peninsula is undergoing remarkable physical and biological changes, in the context of global warming. However, understanding of the dynamics of phytoplankton taxonomic composition in this marginal ice zone remains unclear. In this study, seawater samples collected from 36 stations in the northeastern Antarctic Peninsula were analyzed for nutrients and phytoplankton pigments. Combining with CHEMTAX analysis, remote sensing data, and physicochemical measurements, we investigated the relationships between phytoplankton crops, taxonomic composition, and marine environmental drivers. Integrated chlorophyll a (Chl a ) concentrations (200 m) varied from 8.9 mg/m 2 to 64.2 mg/m 2 , with an average of (23.2±12.0) mg/m 2 and higher phytoplankton biomass concentrated in the coastal region of South Orkney Island and South Shetland Island. Diatoms were the dominant functional group (63%±21%). Higher proportions of diatoms were associated with higher Chl a ( r =0.40, p
ISSN:0253-505X
1869-1099
DOI:10.1007/s13131-021-1865-4