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Threshold of gross primary production for planktonic metabolic balance in the Southern Ocean: An experimental test
Threshold of gross primary production planktonic metabolic balance Southern Ocean An experimental test
2014/5/9
The proposed threshold planktonic gross primary production (GPP) value for O2 of 2.05 mmol m-3 d-1 separating net heterotrophic from net autotrophic communities in the Southern Ocean was tested experi...
Primary production calculations in the Mid-Atlantic Bight, including effects of phytoplankton community size structure
Primary production calculations Mid-Atlantic Bight including effects phytoplankton community size structure
2014/5/9
We developed an absorption-based primary production model that includes the effects of phytoplankton community size structure for the continental margin and adjoining Gulf Stream waters of the Middle ...
Extracellular production of superoxide by marine diatoms: Contrasting effects on iron redox chemistry and bioavailability
Extracellular production of superoxide marine diatoms Contrasting effects iron redox chemistry and bioavailability
2014/5/9
We report the extracellular production of superoxide in cultures of the marine diatoms Thalassiosira weissflogii and Thalassiosira pseudonana. In EDTA-buffered media with ~45 pmol L-1 iron (Fe)(III)',...
Effect of UV-B and different PAR intensities on the primary production of the mixotrophic planktonic ciliate Stentor araucanus
UV-B different PAR intensities primary production mixotrophic planktonic ciliate Stentor araucanus
2014/5/9
Stentor araucanus is a mixotrophic ciliate that, in Andean lakes, inhabits the upper epilimnetic levels, which are commonly avoided by other planktonic organisms. This freshwater heterotrich has dark ...
Secondary production of a dominant oligochaete (Monopylephorus rubroniveus) in the tidal creeks of South Carolina and its relation to ecosystem characteristics
Secondary production a dominant oligochaete tidal creeks of South Carolina relation ecosystem characteristics
2014/5/9
Measurements of the annual production of the oligochaete Monopylephorus rubroniveus, microphytobenthos, pore-water ammonia, sediment composition, and water quality were made from January through Decem...
Production of cobalt binding ligands in a Synechococcus feature at the Costa Rica upwelling dome
cobalt binding ligands Synechococcus feature Costa Rica upwelling dome
2014/5/8
The Costa Rica upwelling dome (CRD; ~8.67°N and 90.6°W) was characterized chemically for cobalt and nickel abundances and speciation and biologically using cyanobacterial abundances and phylogeny. Tot...
Respiration in marine zooplankton-the other side of the coin: CO2 production
marine zooplankton-the other side coin CO2 production
2014/5/8
We measured respiratory release rates of CO2 from various taxonomic groups of zooplankton during three cruises in winter, spring, and summer in the North Atlantic Ocean. Zooplankton species collected ...
Secondary production of a stream metazoan community: Does the meiofauna make a difference?
Secondary production stream metazoan community meiofauna
2014/5/8
The benthic communities of streams contain invertebrates of a wide range of body size and from many taxa. Owing mainly to methodological problems, however, the contribution of smaller and more obscure...
Biological and photochemical production of dissolved gaseous mercury in a boreal lake
Biological and photochemical production dissolved gaseous mercury boreal lake
2014/5/19
We used in situ experiments and measured depth profiles of dissolved gaseous mercury (DGM) to investigate the relative contribution of photochemical versus biological processes on the production of DG...
Effects of sunlight and hydroxyl radical on dissolved organic matter: Bacterial growth efficiency and production of carboxylic acids and other substrates
Effects of sunlight hydroxyl radical dissolved organic matter: Bacterial growth efficiency production of carboxylic acids other substrates
2014/5/19
This study examines the importance of several possible mechanisms causing sunlight-mediated changes in the amounts of bacterial utilization and biomass growth on dissolved organic matter (DOM) from al...
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...
Zooplankton life cycles: Direct documentation of pelagic births and deaths relative to diapausing egg production
Zooplankton life cycles pelagic births
2014/5/16
Zooplankton demographics operate over multiple time scales corresponding to pelagic parthenogenetic generations, an overwintering stage, and an ‘‘egg bank.’’ Comparisons of pelagic birth and death rat...
Supplementation of a diatom diet with cholesterol can enhance copepod egg-production rates
a diatom diet cholesterol copepod egg-production rates
2014/5/14
Cholesterol is required for animal growth, yet it cannot be biosynthesized de novo by crustaceans. Dietary sterols are thus necessary for the growth and reproduction of copepods. Sterols vary widely i...
Benthic primary production and nutrient cycling in sediments with benthic microalgae and transient accumulation of macroalgae
Benthic primary production nutrient cycling sediments benthic microalgae transient accumulation of macroalgae
2014/5/22
Annual rates of sediment denitrification and sediment-water fluxes of oxygen and nutrients were quantified at two shallow locations, Virksund and Ulbjerg, in the Limfjorden, Denmark. The sediment was ...
Production and partitioning of organic matter during simulated phytoplankton blooms
Production and partitioning organic matter simulated phytoplankton blooms
2014/5/21
Few studies have examined the partitioning of organic matter in upwelling systems, despite the fact that these systems play a key role in carbon and nitrogen budgets in the ocean. We examined the prod...