Due to the Arctic amplification effect, Svalbard archipelago is an important area for studying ongoing environmental changes. However, its marine ecosystem extremely complex. In this study, we analyze modern assemblages of dinoflagellate cysts (dinocysts) and benthic foraminifera from surface sediment samples around Svalbard. We use multivariate statistical analyses examine relationships betwee...

This paper presents the diatom and palynomorph data from a sediment trap deployed in northern part of East Barents Sea for an annual cycle August 2017 to 2018. The average monthly fluxes diatoms dinoflagellate cysts photic layer northeastern varies 10.4 × 103 640.8 valves m−2 day−1 0.3 90.0 day−1, respectively. Their are related low irradiance during sea-ice cover period, dominance southward cu...

In recent decades, the alteration of coastal food webs (via aquaculture, fishing, and leisure activities), nutrient loading, an expansion monitoring programs have prompted apparent worldwide rise in Harmful Algae Blooms (HABs). Over this time, a parallel increase HABs has also been observed Chilean southern austral region (Patagonia fjords). HAB species like Alexandrium catenella —responsible f...

Dinoflagellate blooms are frequently observed under temporary eutrophication of coastal waters after heavy rains. Growth of these opportunistic microalgae is believed to be promoted by sudden input of nutrients and the absence or inefficiency of their natural enemies, such as grazers and parasites. Here, numerical simulations indicate that increasing nutrient availability not only promotes the ...

The micropaleontological and palynological content, geochemical isotopic composition of a marine sediment core collected off Pointe-des-Monts in eastern Québec, Canada, reveal regional palaeoclimatic paleoceanographic conditions the Lower St. Lawrence Estuary over last ~8200 years. pollen spore content allows comparison with terrestrial palynostratigraphy, whereas dinoflagellate cysts benthic f...

Late Maastrichtian to Danian dinoflagellate cyst and calcareous nannofossil biostratigraphy was analyzed at the Sur Río Chico borehole, Austral Basin, Argentina. Two stratigraphical intervals from 965 1003 m below ground surface of drilled section were defined. The co-occurrence Manumiella bertodano, M. seelandica conorata in 990–1000 1000–1003 mbgs interval, associated with top Neprolithus fre...