Dinoflagellate Cysts in Coastal Sediments as Indicators of Eutrophication: A Case of Gwangyang Bay,South Sea of Korea |
| |
Authors: | So-Young Kim Chang-Ho Moon Hyun-Jin Cho Dhong-Il Lim |
| |
Institution: | (1) Environmental Science Laboratory, South Sea Institute, Korea Ocean Research and Development Institute, Geoje, Gyeongnam, 656-830, South Korea;(2) Department of Oceanography, Pukyong National University, Nam-gu, Daeyeon-dong 599-1, Busan, 608-737, South Korea;(3) Pollution Response Department, Mokpo Coast Guard, Sanjeong-dong, Mokpo, Jeollanamdo, 530-350, South Korea |
| |
Abstract: | Diatom densities in the surface water and dinoflagellate cysts in bottom sediments of Gwangyang Bay were studied to determine
changes in the phytoplankton community structure in response to anthropogenic eutrophication and to assess the use of dinoflagellate
cysts as indicators of coastal eutrophication. Our results show that, in nutrient-enriched environments, diatoms are particularly
benefited from the nutrients supplied and, as a consequence, heterotrophic dinoflagellates that feed on the diatoms can be
more abundant than autotrophic dinoflagellates. In short-core sediment records, a marked shift in autotrophic–heterotrophic
dinoflagellate cyst compositions occurred at a depth of approximately 9–10 cm corresponding to the timing of the 1970s industrialization
around Gwangyang Bay. This tentatively indicates that diatom and dinoflagellate communities here have undergone a considerable
change mainly due to increased nutrient loadings from both domestic sewage effluent and industrial pollution. Our study suggests
a possible potential use of dinoflagellate cysts in providing retrospective information on the long-term effects of coastal
eutrophication. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|