유해조류 Akashiwo sanguinea 대발생에 따른 환경요인 및 박테리아 군집에 대한 변화

Title
유해조류 Akashiwo sanguinea 대발생에 따른 환경요인 및 박테리아 군집에 대한 변화
Alternative Title
Changes in environmental factors and bacteria community caused by harmful algal blooms of Akashiwo sanguinea (Dinophyta)
Author(s)
강준수; 김현정; 정승원; 오석진
KIOST Author(s)
null강준수Kim, Hyun Jung(김현정)Jung, Seung Won(정승원)
Alternative Author(s)
강준수; 김현정; 정승원
Publication Year
2018-10-12
Abstract
To investigate changes in environmental factors and bacteria community during Akashiwo sanguinea blooms, we conducted daily monitoring for 41 days (Nov. 14, 2016 – Feb. 27, 2017), in Jangmok Bay, a semi-closed bay on the southern coast of South Korea. A. sanguinea was first observed on Oct. 31, 2016, and up to 2,935 cells mL-1 appeared on Nov.18, 2016, and A. sanguinea disappeared on Jan. 30, 2018. The mean temperature and salinity were 14.4℃ and 32.2 at the occurrence of A. sanguinea blooms, respectively. Dissolved inorganic phosphorus and dissolved inorganic nitrogen increased during the blooming period, while dissolved silica maintained. Dissolved organic carbon was similar pattern to that of A. sanguinea and showed a maximum of 7.56 mg L-1. The time-lag changes in bacteria abundances might be associated with fluctuation in A. sanguinea blooms. In particular, to analyze bacteria composition of attached to A. sanguinea and the free living bacteria in seawater, the most highest dominant attached bacterium in A. sanguinea was Rickettsia rhipicephali (Alphaproteobacteria) at proportion of 57.5%, also rickettsia rhipicephali (Alphaproteobacteria) was the most pre-dominant species in seawater. Thus, rickettsia rhipicephali is the specific-species bacterium when A. sanguinea was bloomed. However, we still don’t know what this bacterium plays a role of A. sanguinea blooms. Therefore, our next study will explore mst of South Korea. A. sanguinea was first observed on Oct. 31, 2016, and up to 2,935 cells mL-1 appeared on Nov.18, 2016, and A. sanguinea disappeared on Jan. 30, 2018. The mean temperature and salinity were 14.4℃ and 32.2 at the occurrence of A. sanguinea blooms, respectively. Dissolved inorganic phosphorus and dissolved inorganic nitrogen increased during the blooming period, while dissolved silica maintained. Dissolved organic carbon was similar pattern to that of A. sanguinea and showed a maximum of 7.56 mg L-1. The time-lag changes in bacteria abundances might be associated with fluctuation in A. sanguinea blooms. In particular, to analyze bacteria composition of attached to A. sanguinea and the free living bacteria in seawater, the most highest dominant attached bacterium in A. sanguinea was Rickettsia rhipicephali (Alphaproteobacteria) at proportion of 57.5%, also rickettsia rhipicephali (Alphaproteobacteria) was the most pre-dominant species in seawater. Thus, rickettsia rhipicephali is the specific-species bacterium when A. sanguinea was bloomed. However, we still don’t know what this bacterium plays a role of A. sanguinea blooms. Therefore, our next study will explore m
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23054
Bibliographic Citation
한국환경생물학회, pp.138, 2018
Publisher
한국환경생물학회
Type
Conference
Language
English
Publisher
한국환경생물학회
Related Researcher
Research Interests

Phytoplatnkon taxonomy,Phytoplatnkon physiology,Phycosphere,식물플랑크톤 분류,식물플랑크톤 생리,식물플랑크톤, 바이러스, 박테리아 관계

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