Abstract
Sediment samples from Scottish coastal sites, taken over the last 9 years, were stored in closed containers at 5 degrees C. Slurry cultures were used to determine the survival of phytoplankton in these sediments. A range of diatom and dinoflagellate species survived for at least 27 months in these stored samples. A number of species grew for which no resting stage has yet been described: Thalassiosira angulata, T.pacifica, T.punctigera, T.eccentrica, T.minima and T.anguste-lineata. Notable results were survival times of 73 months for Skeletonema costatum, 96 months for Chaetoceros socialis, C.didymus and C.diadema, 109 months for Scrippsiella sp. and 112 months for Lingulo-dinium polyedrum. A single sample was stored and repeatedly cultured for diatoms over a period of 16 months. The number of species cultured from the sediment declined over this time. Lingulo-dinium polyedrum cysts isolated from sediments collected at least 18 months previously gave a hatching success of 97% and cysts isolated from a 9-year-old sample gave a hatching success of 3%. The study indicates the potential importance of coastal sediments as a source of phytoplankton to their overlying waters. The validity of using marine planktonic diatoms and dinoflagellates for modelling geological events is discussed.
Original language | English |
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Pages (from-to) | 343-354 |
Number of pages | 12 |
Journal | J PLANKTON RES |
Volume | 21 |
Issue number | 2 |
Publication status | Published - 1999 |
Keywords
- DINOPHYCEAE
- WATER
- BLOOMS
- RESTING SPORES
- BACILLARIOPHYCEAE
- Marine & Freshwater Biology
- LOCH
- FECAL PELLETS
- Oceanography
- CYSTS
- GONYAULAX-TAMARENSIS
- GERMINATION