Effects of temperature and nutrients on changes in genetic diversity of bacterioplankton communities in a semi-closed bay, South Korea

Title
Effects of temperature and nutrients on changes in genetic diversity of bacterioplankton communities in a semi-closed bay, South Korea
Author(s)
김현정; 정승원
KIOST Author(s)
Kim, Hyun Jung(김현정)Jung, Seung Won(정승원)
Publication Year
2018-10-12
Abstract
Bacterioplankton communities in a semi-closed bay (Jangmok Bay, South Korea) were analysed using a 16S rDNA multiplex 454 pyrosequencing approach. Diversity and operational taxonomic units of bacterioplankton communities in the Jangmok Bay are highest in coldwater seasons and lowest inwarmwater ones. During cold seasons, α-proteobacteria respond rapidly to pulses of the concentration of inorganic nutrients, while γ-proteobacteria during warm water seasons are the most active type of bacterioplankton resent in the prevailing conditions, which include high dissolved organic carbon, chemical oxygen demand and primary production. Cyanobacteria, a minor group constituting 4.58% of the total bacterioplankton, are more abundant at low temperature. Flavobacteria are more abundant in nutrient-rich conditions and the abundance of this group also demonstrated a delayed decline following summer phytoplankton blooms. The pronounced seasonal oscillations in phosphorus concentration and temperature exert strong selection pressure on bacterioplankton communities.are highest in coldwater seasons and lowest inwarmwater ones. During cold seasons, α-proteobacteria respond rapidly to pulses of the concentration of inorganic nutrients, while γ-proteobacteria during warm water seasons are the most active type of bacterioplankton resent in the prevailing conditions, which include high dissolved organic carbon, chemical oxygen demand and primary production. Cyanobacteria, a minor group constituting 4.58% of the total bacterioplankton, are more abundant at low temperature. Flavobacteria are more abundant in nutrient-rich conditions and the abundance of this group also demonstrated a delayed decline following summer phytoplankton blooms. The pronounced seasonal oscillations in phosphorus concentration and temperature exert strong selection pressure on bacterioplankton communities.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/23062
Bibliographic Citation
한국환경생물학회, pp.102, 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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