搜索结果: 106-120 共查到“海洋生物学 phytoplankton”相关记录154条 . 查询时间(0.643 秒)
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 ...
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...
Decrease in molecular weight of photosynthetic products of marine phytoplankton during early diagenesis
molecular weight photosynthetic products marine phytoplankton early diagenesis
2014/5/14
Changes in the size and neutral aldose (NAld) composition of phytoplankton photosynthetic products during the early diagenetic process were experimentally examined using 13C as a tracer. Most (94.7%) ...
Light dependence of selenium uptake by phytoplankton and implications for predicting selenium incorporation into food webs
Light dependent selenium uptake phytoplankton implications predicting selenium incorporation food webs
2014/5/14
The potentially toxic element selenium is first concentrated from solution to a large but highly variable degree by algae and bacteria before being passed on to consumers. The large loads of abiotic a...
Do we need complex mechanistic photoacclimation models for phytoplankton?
complex mechanistic photoacclimation models phytoplankton
2014/5/22
The outputs of simple models relating phytoplankton growth and chlorophyll a (Chl a) to irradiance and nutrient (nitrogen [N] and/or iron [Fe]) availability are compared with those of complex mechanis...
Cycling of colloidal organic carbon and nitrogen during an estuarine phytoplankton bloom
colloidal organic carbon and nitrogen estuarine phytoplankton bloom
2014/5/22
To establish the influence of phytoplankton blooms on the cycling of dissolved and particulate species of organic carbon and nitrogen, we conducted a field study during a series of blooms in a coastal...
The interplay between upwelling and deep convective mixing in determining the seasonal phytoplankton dynamics in the Gulf of Aqaba: Evidence from SeaWiFS and MODIS
upwelling deep convective mixing seasonal phytoplankton dynamics the Gulf of Aqaba SeaWiFS and MODIS
2014/5/22
In the Gulf of Aqaba, the northeasternmost segment of the Red Sea, phytoplankton blooms are more intense than in other oligotrophic regions (e.g., the Sargasso Sea). In this study, we use multiyear in...
Contributions of phytoplankton and other particles to inherent optical properties in New England continental shelf waters
phytoplankton other particles inherent optical properties New England continental shelf waters
2014/5/22
Variability in upper ocean optical properties is often driven by changes in the particle pool. We investigated the effects of such changes by characterizing individual particles. For particles in natu...
Growth rates of coastal phytoplankton from time-series measurements with a submersible flow cytometer
coastal phytoplankton time-series measurements submersible flow cytometry
2014/5/21
Our understanding of the dynamics of phytoplankton communities has been limited by the space and timescales associated with traditional monitoring approaches. To overcome some of these limitations, we...