동해 울릉분지의 동계수직혼합 변동에 따른 식물플랑크톤 기능성 타잎의 변동성: 모델링 연구

Title
동해 울릉분지의 동계수직혼합 변동에 따른 식물플랑크톤 기능성 타잎의 변동성: 모델링 연구
Alternative Title
Variability of the phytoplankton functional types under changing winter vertical mixing in the Ulleung Basin, East Sea: a modeling study
Author(s)
이순미; 유신재
Publication Year
2015-10-15
Abstract
We investigated the impacts of varying winter vertical mixing and atmospheric deposition on the lower trophic level ecosystem using a zero-dimensional European Regional Seas Ecosystem Model (ERSEM) for 2001-2012. The model results show that the changes in winter vertical mixing had varying effects on the competitive advantages of PFTs and thereby altered the succession process of PFTs in the upper mixed layer. As the winter vertical mixing increases, the annual mean of NPP and peak biomass of the total phytoplankton increased, and vice versa. Diatoms responded most positively to the change. Deepening winter vertical mixing would increase NPP but decrease the biomass of flagellates and picophytoplankton becauseof increased grazing. When winter vertical mixing deepened, the NPP and biomass of dinoflagellates decreased as their growing duration decreased. Because the PFTs showed opposite trends in biomass change, there was no significant increase in the total phytoplankton biomass. Taken together, the model suggests that the shallower MLD in the Ulleung Basin may result in a shift toward dominance of small phytoplankton such as flagellates and picophytoplankton and the increasing atmospheric deposition would amplify such changes. the changes in winter vertical mixing had varying effects on the competitive advantages of PFTs and thereby altered the succession process of PFTs in the upper mixed layer. As the winter vertical mixing increases, the annual mean of NPP and peak biomass of the total phytoplankton increased, and vice versa. Diatoms responded most positively to the change. Deepening winter vertical mixing would increase NPP but decrease the biomass of flagellates and picophytoplankton becauseof increased grazing. When winter vertical mixing deepened, the NPP and biomass of dinoflagellates decreased as their growing duration decreased. Because the PFTs showed opposite trends in biomass change, there was no significant increase in the total phytoplankton biomass. Taken together, the model suggests that the shallower MLD in the Ulleung Basin may result in a shift toward dominance of small phytoplankton such as flagellates and picophytoplankton and the increasing atmospheric deposition would amplify such changes.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/25254
Bibliographic Citation
PICES 2015, pp.168, 2015
Publisher
PICES
Type
Conference
Language
English
Publisher
PICES
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