搜索结果: 151-165 共查到“海洋科学 Phytoplankton”相关记录224条 . 查询时间(0.046 秒)
Experimental test of bacteria–phytoplankton coupling in the Southern Ocean
bacteria–phytoplankton coupling Southern Ocean
2014/5/13
A set of eight large (20 m3
) mesocosms were moored in Johnson’s Dock (62839.5769S, 60822.4089W, Livingston Island,
Antarctica) to experimentally generate a gradient of phytoplankton biomass and pro...
A general kinetic model for iron acquisition by eukaryotic phytoplankton
A general kinetic model iron acquisition eukaryotic phytoplankton
2014/5/9
The conventional model of iron uptake in marine eukaryotic phytoplankton—the Fe' model—suggests a dependency of uptake rate on the concentration of unchelated iron species (Fe'), and not the...
Does the red tide dinoflagellate Karenia brevis use allelopathy to outcompete other phytoplankton?
red tide dinoflagellate Karenia brevis allelopathy outcompete other phytoplankton
2014/5/9
Monospecific blooms of phytoplankton can disrupt pelagic communities and negatively affect human health and economies. Interspecific competition may play an important role in promoting blooms, and so ...
Effects of atmospheric nitrogen deposition on nutrient limitation and phytoplankton biomass in unproductive Swedish lakes
atmospheric nitrogen deposition nutrient limitation phytoplankton biomass unproductive Swedish lakes
2014/5/9
We used chemical data (3,907 lakes) and phytoplankton biomass (chlorophyll a) data (225 lakes) from Swedish lake monitoring programs to assess the effects of atmospheric nitrogen (N) deposition on nut...
We determined lysis rates of phytoplankton cells in Lake Kinneret and in lake-water microcosms by measuring the activities of particle-associated and dissolved esterases and the decay rate of the latt...
Phytoplankton growth rates in the Atlantic subtropical gyres
Phytoplankton growth rates Atlantic subtropical gyres
2014/5/8
Reported estimates of phytoplankton growth rate (μ) in the subtropical gyres range widely from 0.1-0.2 to 1-2 d-1. Dividing chlorophyll a (Chl a)-normalized photosynthesis (PB) by the phytoplankton ca...
Taxonomic variability of phosphorus stress in Sargasso Sea phytoplankton
Taxonomic variability phosphorus stressLSargasso Sea phytoplankton
2014/5/19
Low inorganic phosphorus (SRP) concentrations and high inorganic nitrogen to phosphorus ratios suggest that phytoplankton production in the northwestern Sargasso Sea may be controlled to some extent b...
Availability of iron and major nutrients for phytoplankton in the north-east Atlantic Ocean
Availability of iron and major nutrients for phytoplankton in the north-east Atlantic Ocean
2014/5/19
Because of recent findings that Fe is a limiting factor for phytoplankton activity even at relatively high dissolved iron (DFe) concentrations, the potential importance of Fe limitation was revisited ...
Coupled nitrogen and oxygen isotope fractionation of nitrate during assimilation by cultures of marine phytoplankton
Coupled nitrogen oxygen isotope fractionation
2014/5/19
We report the first measurements of coupled nitrogen (N) and oxygen (O) isotopic variations of nitrate (NO )2
3
during its assimilation by laboratory cultures of marine phytoplankton and deriv...
Diurnal cycling of glutathione in marine phytoplankton: Field and culture studies
glutathione marine phytoplankton Field culture
2014/5/19
Glutathione is an abundant intracellular thiol that is involved in the detoxification of reactive oxygen species generated in the presence of light. We used short-term continuous cultures of Emiliania...
Coupling of epipelagic and mesopelagic heterotrophic picoplankton production to phytoplankton biomass in the Antarctic polar frontal region
epipelagic mesopelagic heterotrophic picoplankton production phytoplankton biomass Antarctic polar frontal region
2014/5/19
We assessed relationships between phytoplankton standing stock, measured as chlorophyll a (Chl a), primary production (PP), and heterotrophic picoplankton production (HPP), in the epipelagic zone (0-1...
Effects of experimental greenhouse warming on phytoplankton and zooplankton communities in fishless alpine ponds
experimental greenhouse warming on phytoplankton zooplankton communities fishless alpine ponds
2014/5/19
The impacts of global warming on aquatic ecosystems are expected to be most pronounced at higher trophic levels in cold-water environments. Therefore, we hypothesized that warming of fishless alpine p...
Allelopathic interactions between phytoplankton species: The roles of heterotrophic bacteria and mixing intensity
Allelopathic interactions phytoplankton species
2014/5/16
Toxin-producing phytoplankton species may compensate for competitive disadvantages by secreting chemicals that
affect toxin-sensitive phytoplankton species. Heterotrophic bacteria, however, may, in t...
Fingerprints of biocomplexity: Taxon-specific growth of phytoplankton in relation to environmental factors
biocomplexity Taxon-specifi c
2014/5/16
Phytoplankton and environmental conditions in Lake Washington, Seattle, Washington, are discussed from the
perspective of dynamic relationships between taxon-specific growth rates and environme...
Phytoplankton nutrient competition under dynamic light regimes
Phytoplankton nutrient competition dynamic light regimes
2014/5/16
Many physiological processes in phytoplankton, including nutrient uptake, vary on a number of temporal scales.
Experiments show that the daily cycle in irradiance affects nutrient uptake rates. We us...