Summer pattern of phytoplankton distribution at a station in jangmok bay |
| |
| Authors: | Won Je Lee Kyoungsoon Shin Pung-Guk Jang Min-Chul Jang Nam Joo Park |
| |
| Institution: | (1) Department of Environmental Engineering, College of Engineering, Kyungnam University, 631-701 Masan, Korea;(2) Southern Coastal Environment Research Division, South Sea Institute, 630-850 KORDI, Geoje, Korea;(3) Department of Marine Science, College of Natural Sciences, Pusan National University, 609-735 Busan, Korea |
| |
| Abstract: | Daily changes in phytoplankton abundance and species composition were monitored from July to September 2003 (n=47) to understand
which factors control the abundance at a station in Jangmok Bay. During the study, the phytoplankton community was mainly
composed of small cell diatoms and dinoflagellates, and the dominant genera wereChaetoceros,Nitzschia, Skeletonema andThalassionema. Phytoplankton abundance varied significantly from 6.40x104 to 1.22x107 cells/l. The initially high level of phytoplankton abundance was dominated by diatoms, but replacement by dinoflagellates
started when the N/P ratio decreased to < 5.0. On the basis of the N/P and Si/N ratios, the sampling period could be divided
into two: an inorganic silicate limitation period (ISLP, 14th July-12th of August) and an inorganic nitrogen limitation period (INLP, 13th of August - the end of the study). Phosphate might not limit the growth of phytoplankton assemblages in the bay during the
study period. This study suggests that phytoplankton abundance and species composition might be affected by the concentrations
of inorganic nutrients (N and Si), and provides baseline information for further studies on plankton dynamics in Jangmok Bay. |
| |
| Keywords: | inorganic nutrients silicate limitation nitrogen limitation phytoplankton |
| 本文献已被 SpringerLink 等数据库收录！ |
|
