Dinoflagellate Cysts and Marine Sediment Dynamics
Summary
Dinoflagellate cysts are dormant, wall-bound stages produced by planktonic dinoflagellates that settle into marine sediments and constitute both ecological seed banks and archives of past environmental conditions. These organic microfossils accumulate at the sediment–water interface, where physical processes such as bioturbation, sediment transport and diagenesis influence their preservation and distribution. The dynamics of cyst deposition reflect the interplay of biological life cycles, water column stratification, nutrient availability and hydrodynamic forces, including upwelling and current-driven lateral advection. In coastal and continental-shelf settings, cyst assemblages record seasonal bloom events and anthropogenic disturbances, while in deep-sea environments they serve as proxies for palaeoceanographic reconstructions of temperature, salinity and circulation patterns. Understanding the production, transport and deposit characteristics of dinoflagellate cysts has practical applications for predicting harmful algal blooms, interpreting sediment core records and improving models of benthic–pelagic coupling and carbon flux in the marine system.
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Dinoflagellate Cysts and Marine Sediment Dynamics publication trend
The graph below shows the total number of articles in dinoflagellate cysts and marine sediment dynamics across all publications each year (not limited to Nature Index journals).
Technical terms
Dinoflagellate cyst: a resistant resting stage formed by dinoflagellates that settles in sediments and can germinate under favourable conditions.
Benthic–pelagic coupling: the exchange of organisms, nutrients and particles between the seafloor and the overlying water column.
Palaeoceanographic proxy: a measurable biological or physical parameter preserved in sediments used to infer past ocean conditions.
Upwelling: the rising of cold, nutrient-rich deep water to the surface, influencing primary production and cyst deposition.
Sediment diagenesis: the suite of physical, chemical and biological processes that alter sediments after initial deposition.
References
- Naturally and Anthropogenically Induced Lingulodinium polyedra Dinoflagellate Red Tides in the Galician Rias (NW Iberian Peninsula). Toxins (2024).
- Environmental Factors Affecting Spatial Dinoflagellate Cyst Distribution in Surface Sediments Off Aveiro-Figueira da Foz (Atlantic Iberian Margin). Frontiers in Marine Science (2021).
- Transport Bias by Ocean Currents in Sedimentary Microplankton Assemblages: Implications for Paleoceanographic Reconstructions. Paleoceanography and Paleoclimatology (2019).
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