A prolonged red tide of Heterocapsa triquetra (Ehrenberg) F. Stein (Dinophyceae) and phytoplankton succession in a eutrophic estuary (Turkey)

作者：Tas S^*

来源：Mediterranean Marine Science, 2015, 16(3): 621-627.

• Heterocapsa triquetra
• dinoflagellate
• phytoflagellate
• red tide
• Golden Horn

A prolonged red tide of Heterocapsa triquetra and phytoplankton succession were investigated in a eutrophic estuary (Golden Horn) for a year. Runoff following the rainfall in winter supplied large amounts of nutrients and also created a mesohaline frontal zone in the middle and upper estuary. A red tide of H. triquetra was first observed with an orange-brownish water discoloration at the upper estuary in January. The highest cell density of H. triquetra was 2.7x10(6) cells l(-1) in January and it reached 19.2x10(6) cells l(-1) in April. Successive blooms continued with dinoflagellate Prorocentrum minimum in May and phytoflagellates Eutreptiella marina and Fibrocapsa sp. in summer. High chl-alpha and dissolved oxygen were measured in spring depending on algal biomass. Findings indicate that H. triquetra might be adapted to moderate salinity and low temperatures and red tide events should be considered a response to increasing eutrophication due to large amounts of nutrients. Eutrophication could cause harmful algal blooms for this area in the near future.

• 出版日期2015