Spatio-temporal variations of marine environments and phytoplankton community in the Gochang Coastal Waters (GCW) of Southern West Sea in Korea
Yoon, Y.H. (2020). Spatio-temporal variations of marine environments and phytoplankton community in the Gochang Coastal Waters (GCW) of Southern West Sea in Korea. Journal of the Korea Academia-Industrial Cooperation Society 21(11): 477-493. https://dx.doi.org/10.5762/KAIS.2020.21.11.477
In: Journal of the Korea Academia-Industrial Cooperation Society. KAIS: Korea. ISSN 1975-4701; e-ISSN 2288-4688, more
|   |
| Keyword |
|
| Author keywords |
GCW; Marine Environments; T-S Diagram; Phytoplankton Community; Dominant Species; PCA; Seawater Mixing |
| Abstract |
This study conducted a seasonal survey to analyze the spatio-temporal variations of marine environments and phytoplankton community in Gochang Coastal Waters (GCW) from August 2016 to April 2017. In the results, the water temperature ranged from 2.1℃ to 34.5℃, showing a large seasonal variation, but the salinity changed from 31.14 psu to 32.64 psu. Therefore, the seasonal variations of water types in GCW were mainly determined by water temperature. The phytoplankton community consisted of 53 genera and 86 species, showing a relatively simple distribution. The phytoplankton cell density ranged from 2.2 to 689.2 cells mL-1, with an average of 577.2 cells mL-1, which was low in autumn and high in winter. The seasonal succession of phytoplankton dominant species was mainly diatoms during the whole year, Leptocylindrus danicus, Chaetoceros curvisetus, Skeletonema costatum-ls in summer, Paralia sulcata, Eucampia zodiacus in autumn, S. costatum-ls, Thalassiosira nordenskioeldii in winter, and S. costatum-ls, Asterionella glacialis in spring. In other words, the phytoplankton community showed high diversity in GCW throughout the year. According to the PCA, GCW were easily heated and cooled by radiant energy at lower depth, and the seasonal distributions of phytoplankton were determined by the supply of nutrients by re-fuelling of surface sediments due to the seawater mixing such as tidal mixing. |
|
