Annual Dynamics of Phytoplankton in Zhelin Bay: 2000~2001

作者：Zhou Kai · 年份：2002 · 被引用次数：3 · 研究领域：Marine and coastal ecosystems、Environmental Changes in China、Microbial Community Ecology and Physiology

Zhelin Bay is one of the most important bays for marine culture in Guangdong Province of China. Due to the increasing human population and marine culture in the last 10 years, the environment has changed dramatically. Although Phaeocystis blooms had brought tremendous economic loss and ecological damage to this area in 1997 and 1999, few studies followed and there are no previous investigations of phytoplankton. To understand why Phaeocystis blooms frequently hit this area and how the increased marine culture affects this ecosystem, we investigated the temporal and spatial distribution of phytoplankton, zooplankton, nutrients, trace elements, dissolved oxygen, etc. from May 2000. This paper describes the distribution of phytoplankton communities in a 1-year period (2000-05～2001-05).Water samples were collected from eight stations weekly (March to November) or biweekly (December to February). Sampling was scheduled to cover the period around high tide (±1.5h). At each station, water samples were collected from 0.5 m below the surface and 0.5 m above the bottom using a 5-L HQM-1 sampler. Each sample (1 L) was fixed with acid lugol solution in situ, and concentrated to 30~100ml based on different densities. Species were analyzed with the Zeiss microscope and a 1-ml Sedgewick-Rafte counting frame was used for cell counting. Most organisms were identified to species, but a few were clustered into higher classes. Because Zhelin Bay is shallow (mean depth 4.8m) and the water is well...