Changes in coastal phytoplankton community structure under future climate conditions: A mesocosm study

Title
Changes in coastal phytoplankton community structure under future climate conditions: A mesocosm study
Author(s)
현봉길; 신경순; 최근형; 이우진; 장풍국; 장민철; 문창호
KIOST Author(s)
Hyun, Bonggil(현봉길)Shin, Kyoungsoon(신경순)Jang, Pung Guk(장풍국)
Publication Year
2013-10-11
Abstract
The coastal phytoplankton community under predicted ocean acidification and sea surface warming conditions was studied using an outdoor mesocosm approach. Nine mesocosm bags were filled with coastal waters from Jangmok bay in the South Sea of Korea. Control and two different treatments for the level of CO2 and temperature were set up in triplicates (control: 380 ppm, treatment I: 980 ppm, treatment II: 980 ppm and +3°C). Nutrients (nitrate, phosphate and silicate) were amended at the start of the experiment to facilitate phytoplankton growth. During the first 12 days of incubation when nutrients were replete, the highest phytoplankton biomass was observed in treatment I where diatoms were predominant (>95% of total phytoplankton biomass). As diatoms decreased, dinoflagellates increased for all conditions during the subsequent nutrient depleted period. The response of different phytoplankton species to the CO2 and temperature perturbations differed significantly. The diatom Skeletonema spp. showed positive growth in treatment I and II during the nutrient replete period, but no significant growth was observed during the nutrient deplete period. Chaetoceros socialis showed positive growth in treatment I, but in treatment II, negative growth was observed during the nutrient deplete period. Cerataulina dentata showed negative growth in both treatment I and II during the nutrient deplete period. The different responses ofof Korea. Control and two different treatments for the level of CO2 and temperature were set up in triplicates (control: 380 ppm, treatment I: 980 ppm, treatment II: 980 ppm and +3°C). Nutrients (nitrate, phosphate and silicate) were amended at the start of the experiment to facilitate phytoplankton growth. During the first 12 days of incubation when nutrients were replete, the highest phytoplankton biomass was observed in treatment I where diatoms were predominant (>95% of total phytoplankton biomass). As diatoms decreased, dinoflagellates increased for all conditions during the subsequent nutrient depleted period. The response of different phytoplankton species to the CO2 and temperature perturbations differed significantly. The diatom Skeletonema spp. showed positive growth in treatment I and II during the nutrient replete period, but no significant growth was observed during the nutrient deplete period. Chaetoceros socialis showed positive growth in treatment I, but in treatment II, negative growth was observed during the nutrient deplete period. Cerataulina dentata showed negative growth in both treatment I and II during the nutrient deplete period. The different responses of
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/26725
Bibliographic Citation
PICES-2013 annual meeting, pp.128 - 129, 2013
Publisher
North
Type
Conference
Language
English
Publisher
North
Related Researcher
Research Interests

Plankton ecology and physiology,Risk assessment,Ship ballast water,플랑크톤 생리, 생태,위해성평가,선박평형수

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