Comparison of bacterioplankton communities between before and after inoculation with an algicidal material, Ca-aminoclay, to mitigate Cochlodinium polykrikoides blooms: Assessment using microcosm experiments

Title
Comparison of bacterioplankton communities between before and after inoculation with an algicidal material, Ca-aminoclay, to mitigate Cochlodinium polykrikoides blooms: Assessment using microcosm experiments
Author(s)
정승원; 이택견
KIOST Author(s)
Jung, Seung Won(정승원)Lee, Taek Kyun(이택견)
Publication Year
2016-12-09
Abstract
We investigated the ecological responses with a focus on the diversity of bacterioplankton communities with regard to the effects of an artificial clay (Ca-aminoclay) on suppressing harmful algal blooms (HABs) of Cochlodinium polykrikoides in realistic natural conditions in microcosms. The Ca-aminoclay induced cell lysis in the HAB organisms within a few minutes, but had negligible impact on the non-harmful phytoplankton. However, the findings showed that applying Ca-aminoclay could have negative environmental effects. Specifically, it increased nutrient and dissolved organic carbon concentrations and caused anoxic conditions to emerge. The bacterioplankton abundance increased and the dominant species changed from α-proteobacteria and Bacteroidetes to γ-proteobacteria. It was noted that Phaeobacter caeruleus (α-proteobacteria) was strongly associated with the blooming stage of C. polykrikoides, suggesting that the α-proteobacteria are intimately linked to the development of C. polykrikoides blooms. In contrast, Alteromonas macleodii (γ-proteobacteria) was associated with the termination of HABs and hypertrophic environmental conditions due to the algicidal material. The abundance of heterotrophic flagellates and ciliates increased rapidly with the increase in bacterioplankton. The information obtained in this study should be important when incorporated into our understanding of the interactions between bacteriopin realistic natural conditions in microcosms. The Ca-aminoclay induced cell lysis in the HAB organisms within a few minutes, but had negligible impact on the non-harmful phytoplankton. However, the findings showed that applying Ca-aminoclay could have negative environmental effects. Specifically, it increased nutrient and dissolved organic carbon concentrations and caused anoxic conditions to emerge. The bacterioplankton abundance increased and the dominant species changed from α-proteobacteria and Bacteroidetes to γ-proteobacteria. It was noted that Phaeobacter caeruleus (α-proteobacteria) was strongly associated with the blooming stage of C. polykrikoides, suggesting that the α-proteobacteria are intimately linked to the development of C. polykrikoides blooms. In contrast, Alteromonas macleodii (γ-proteobacteria) was associated with the termination of HABs and hypertrophic environmental conditions due to the algicidal material. The abundance of heterotrophic flagellates and ciliates increased rapidly with the increase in bacterioplankton. The information obtained in this study should be important when incorporated into our understanding of the interactions between bacteriop
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/24261
Bibliographic Citation
International Conference on Coastal Ecology and Marine Biotechnology, pp.55, 2016
Publisher
International Conference on coastal ecology and marine biotechnology
Type
Conference
Language
English
Publisher
International Conference on coastal ecology and marine biotechnology
Related Researcher
Research Interests

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

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