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Decadal-scale variations of sedimentary dinoflagellate cyst records from the Yellow Sea over the last 400 years

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Title
Decadal-scale variations of sedimentary dinoflagellate cyst records from the Yellow Sea over the last 400 years
Other Titles
지난 400년 동안 황해퇴적물에 기록된 와편모조류 시스트의 수십년 주기 변동 기록 연구
Authors
Kim, Sun Young
Lim, Dhong-il
Kang, Sung-Ho
Huh, Sik
Shin, Hyeon Ho
Roh, Youn Ho
Subject
Marine & Freshwater Biology; Oceanography
Keywords
Alexandrium bloom; Yellow Sea; dinoflagellate cyst; eutrophication; mud deposits
Issue Date
2018
Citation
Kim, Sun Young, et al. 2018. "Decadal-scale variations of sedimentary dinoflagellate cyst records from the Yellow Sea over the last 400 years". ESTUARINE COASTAL AND SHELF SCIENCE, 200(1): 91-98.
Abstract
In recent decades, the Yellow Sea has experienced severe environmental deterioration due to increasing input of anthropogenic pollutants and consequently accelerated eutrophication. Whilst there have been significant advances in documenting historical records of metal pollution in the Yellow Sea region, changes in phytoplankton community structures affected by eutrophication remain understudied. Here, we present a new record of dinoflagellate cyst-based signals in age-dated sediment cores from the Yellow Sea mud deposits to provide better insight into eutrophication history and identification of associated responses of the regional phytoplankton community. It is of note that there were significant variations in abundances and community structures of dinoflagellate cysts in three historical stages in association with increasing anthropogenic activity over the last 400 years. Pervasive effects of human interference altering the Yellow Sea environments are recognized by: 1) an abrupt increase of organic matter, including the diatom-produced biogenic opal concentrations (∼1850);2) a distinct shift in phytoplankton composition towards dinoflagellate dominance (∼1940), and 3) recent acceleration of dinoflagellate cyst accumulation (∼1990). Particularly in the central Yellow Sea shelf, the anomalously high deposition of dinoflagellate cysts (especially Alexandrium species) is suggested to be a potentially important source of inoculum cells serving as a seed population for localized and recurrent blooms in coastal areas around the Yellow Sea.
URI
http://repository.kopri.re.kr/handle/201206/6082
DOI
https://doi.org/10.1016/j.ecss.2017.10.006
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