Spring bloom dynamics in Kongsfjorden, Svalbard: nutrients, phytoplankton, protozoans and primary production
نویسندگان
چکیده
منابع مشابه
Soft bottom community structure and diversity in Kongsfjorden (Svalbard)
Marine diversity is currently one of the most studied topics in ecology especially under the frame of global and regional environmental changes. In the marine realm biodiversity declines from the tropics to the Arctic (Thorson 1957, Brattegard & Holthe 1997, Roy et al. 1996, 1998, Gray 2001). Habitat and environmental heterogeneity generally favour biodiversity; additionally, intermediate physi...
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Primary production and uptake rates of ammonium, nitrate and silicic acid were measured during the 1996 spring bloom in the Oslofjord, southern Norway, using isotope methodology (14C, 15N and 32Si). Chlorophyll a (chl a) standing stock peaked at 38 mg chl a m–3. Diatoms, especially Thalassiosira nordenskioeldii, dominated the plankton community. The diatom bloom followed a sigmoid growth patter...
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The importance of including directional and spectral light in simulations of ocean radiative transfer was investigated using a coupled biogeochemical-circulation-radiative model of the global oceans. The effort focused on phytoplankton abundances, nutrient concentrations and vertically-integrated net primary production. The importance was approached by sequentially removing directional (i.e., d...
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Microbial eukaryotes can play prominent roles in the Arctic marine ecosystem, but their diversity and variability is not well known in the ice-covered ecosystems. We determined the community composition of microbial eukaryotes in an Arctic under-ice spring bloom north of Svalbard using metabarcoding of DNA and RNA from the hypervariable V4 region of 18S nrDNA. At the two stations studied, the p...
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The inter-annual dynamics of the photosynthetic ciliateMesodinium rubrum in the central Gulf of Finland in spring-summer continuum during 5 years were followed. The analysis was mainly based on high-resolution measurements and sampling in the surface layer along the ferry route Tallinn-Helsinki. The main purpose was to analyze the dynamics of M. rubrum biomass, its contribution to the photosynt...
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ژورنال
عنوان ژورنال: Polar Biology
سال: 2011
ISSN: 0722-4060,1432-2056
DOI: 10.1007/s00300-011-1053-7