EFFECTS OF CRUDE OIL EXPOSURE ON PLANKTON ASSEMBLAGES IN MARINE MESOCOSMS

Title
EFFECTS OF CRUDE OIL EXPOSURE ON PLANKTON ASSEMBLAGES IN MARINE MESOCOSMS
Author(s)
정승원; 권오윤; 이은선; 강정훈; 김문구; 심원준; 김영옥
KIOST Author(s)
Jung, Seung Won(정승원)Kang, Jung Hoon(강정훈)Kim, Moon Koo(김문구)Shim, Won Joon(심원준)Kim, Young Ok(김영옥)
Publication Year
2010-06-01
Abstract
To assess the effects of crude oil spills on marine planktonic communities and environmental factors, marine mesocosms comprising 9 enclosures contained 1,000 L of seawater were manipulated over a period of 9 days at a monitoring station in the South Sea Institute of KORDI. The enclosure experiment was conducted in two different treatments: 1) A crude oil (Iranian heavy crude oil) was added at a concentration of 1,000 ppm. 2) The crude oil and a dispersant (Corexit EC9500; concentration of 100 ppm) were exposed at the ratio of 10:1 (v/v). And, a control enclosure was also prepared with no additions. Environmental factors (water temperature, salinity, pH, dissolved oxygen, nutrients, and dissolved organic carbon) and biological factors (hetero- and autotrophic bacteria, and autotrophic nano flagellates) showed no significant differences at three depths (0.5, 2.5, and 4.5 m) in each enclosed water column (p > 0.05). Most planktonic communities in oil and dispersant group responded drastically more than other groups: heterotrophic bacterial abundances increased from 0.95 ± 0.04 to 1.72 ± 0.39 x 108 cells ml-1 for the first 2 days and then decreased rapidly for the remaining days. Abundances of heterotrophic nano flagellate abundances increased quickly to the increase of bacterial cells. Phytoplankton in the treatment of oil and dispersant represented a clear decrease of its abundance and a change of its composition from predominant diatoms to flagellates. Phytoplankton abundances in the addition of oil and the control, however, were recovered gradually after rapid decrease for 1 day. Abundances of zooplankton community to oil and dispersant exposure were largely reduced, while they were less adversely affected in oil and the control groups. The present results demonstrate that planktonic ecosystem responded sensitively to massive inputs of the crude oil and treatment of dispersant. Moreover, the addition of oil and dispersant might more stimulate rapid growth of bact
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/28960
Bibliographic Citation
INTERNATIONAL CONFERENCE ON MARINE POLLUTION AND ECOTOXICOLOGY, pp.127, 2010
Publisher
Department of Biology and Chemistry, City University of Hong Kong
Type
Conference
Language
English
Publisher
Department of Biology and Chemistry, City University of Hong Kong
Related Researcher
Research Interests

Microplastic pollution,Persistent Organic Pollutants,Oil Pollution,미세플라스틱 오염,잔류성 유기오염물질,유류오염

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