scholarly journals Variability of Phytoplankton Size Structure in Response to Changes in Coastal Upwelling Intensity in the Southwestern East Sea

2017 ◽  
Vol 122 (12) ◽  
pp. 10262-10274 ◽  
Author(s):  
Jung‐Wook Shin ◽  
Jinku Park ◽  
Jang‐Geun Choi ◽  
Young‐Heon Jo ◽  
Jae Joong Kang ◽  
...  
Keyword(s):  
Coastal Upwelling ◽  
Size Structure ◽  
East Sea ◽  
Phytoplankton Size ◽  
Upwelling Intensity ◽  
Phytoplankton Size Structure

Size-fractionated surface phytoplankton in the Kara and Laptev Seas: environmental control and spatial variability

2021 ◽  
Vol 664 ◽  
pp. 59-77
Author(s):  
AB Demidov ◽  
IN Sukhanova ◽  
TA Belevich ◽  
MV Flint ◽  
VI Gagarin ◽  
...  
Keyword(s):  
Spatial Variability ◽  
Primary Production ◽  
Water Temperature ◽  
Environmental Control ◽  
Size Structure ◽  
Total Carbon ◽  
The Arctic ◽  
Size Groups ◽  
Phytoplankton Size ◽  
Phytoplankton Size Structure

Climate-induced variability of phytoplankton size structure influences primary productivity, marine food web dynamics, biosedimentation and exchange of CO2 between the atmosphere and ocean. Investigation of phytoplankton size structure in the Arctic Ocean is important due to rapid changes in its ecosystems related to increasing temperature and declining sea ice cover. We estimated the contribution of surface micro-, nano- and picophytoplankton to the total carbon biomass, chlorophyll a concentration and primary production in the Kara and Laptev Seas and investigated the relationships of these phytoplankton size groups with environmental factors which determine their spatial variability. Additionally, we compared chlorophyll specific carbon fixation rate, specific growth rate and carbon to chlorophyll ratios among different phytoplankton size groups. The investigation was carried out from August to September 2018. Generally, picophytoplankton was dominant in terms of chlorophyll a and primary production in the whole study area. The spatial variability of phytoplankton size classes was influenced by river discharge and relied mainly on water temperature, salinity and dissolved silicon concentration. Microphytoplankton prevailed across the river runoff region under conditions of low salinity and relatively high water temperature, while picophytoplankton was predominant under conditions of high salinity and low water temperature. Our study is the first to characterize size-fractionated phytoplankton abundance in the Kara and Laptev Seas, and provides a baseline for future assessment of the response of Kara and Laptev Sea ecosystems to climate-induced processes using phytoplankton size structure.

scholarly journals Physical controls on phytoplankton size structure, photophysiology and suspended particles in a Norwegian biological hotspot

2019 ◽  
Vol 175 ◽  
pp. 284-299 ◽  
Author(s):  
Glaucia M. Fragoso ◽  
Emlyn J. Davies ◽  
Ingrid Ellingsen ◽  
Matilde S. Chauton ◽  
Trygve Fossum ◽  
...  
Keyword(s):  
Size Structure ◽  
Suspended Particles ◽  
Physical Controls ◽  
Phytoplankton Size ◽  
Phytoplankton Size Structure
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