Assessing the ecosystem health status of Korea Gwangyang and Jinhae bays based on a planktonic index of biotic integrity (P-IBI) SCIE SCOPUS KCI

Cited 14 time in WEB OF SCIENCE Cited 15 time in Scopus
Title
Assessing the ecosystem health status of Korea Gwangyang and Jinhae bays based on a planktonic index of biotic integrity (P-IBI)
Author(s)
Baek, Seung Ho; Son, Moonho; Kim, Dongseon; Choi, Hyun-Woo; Kim, Young-Ok
KIOST Author(s)
Baek, Seung Ho(백승호)Kim, Dongseon(김동선)Choi, Hyun Woo(최현우)Kim, Young Ok(김영옥)
Publication Year
2014-09
Abstract
To assess the responses of planktonic organisms to pollutants in the coastal ecosystems of Gwangyang and Jinhae bays in Korea, we investigated seasonal changes in various biological factors during the period from 2010 to 2012. Based on the characteristics of nutrient uptake by planktonic organisms under the coastal pollution conditions, we focused on four major parameters: total phytoplankton, harmful algal bloom (HAB) species, heterotrophic bacteria (HB) and Escherichia coli to develop a planktonic index of biotic integrity (P-IBI). The threshold values for abundances of total phytoplankton, HAB species and HB were based on the zero Z-score following normal distribution of the data for each parameter during the three years. Based on this approach, the threshold values were: 1.2 x 10(6) cells L-1 for total phytoplankton; 3.3 x 10(4) cells L-1 for HAB species; and 1.7 x 10(6) cells mL(-1)for HB. Five grade levels for the P-IBI were established, based on the zero Z-scores. The threshold value for E. coli not to be normalized was based on the USEPA and the Korean Ministry of Oceans and Fisheries guidelines. Validity of the grades and threshold values for each parameter established using the field data were tested by algal bioassays in a mesocosm enclosure, which supported the threshold values obtained in the field. In Gwangyang Bay, the annual integrated score for the P-IBI in 2010 was better than in the other years of the study. In Jinhae Bay, the P-IBI for the inner area of Masan Bay was Grade IV-V, indicating unhealthy conditions relative to the central and western outer areas, where the P-IBI varied from Grade II to III. The P-IBI values for Gwangyang and Jinhae bays were mostly rated as "Good (Grade II) or Fair (Grade III)", except for a few stations in the semi-enclosed areas of the inner part of Jinhae Bay. From an overall view based on the P-IBI developed in this study, the coastal ecosystem health status in Gwangyang Bay was in a better condition than Jinhae Bay. The P-IBI indicated also a change to an unhealthy status during the rainy periods of spring and summer, whereas during winter and autumn the index indicated healthy conditions.
ISSN
1738-5261
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/2739
DOI
10.1007/s12601-014-0029-2
Bibliographic Citation
OCEAN SCIENCE JOURNAL, v.49, no.3, pp.291 - 311, 2014
Publisher
KOREA OCEAN RESEARCH DEVELOPMENT INST
Keywords
Gwangyang Bay; Jinhae Bay; planktonic index; marine ecosystem health; coastal pollutant
Type
Article
Language
English
Document Type
Article
Publisher
KOREA OCEAN RESEARCH DEVELOPMENT INST
Related Researcher
Research Interests

Marine ecology,Plankton,Protists,해양생태,부유생물,원생생물

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