搜索结果: 151-165 共查到“海洋生物学 ocean”相关记录185条 . 查询时间(0.101 秒)
Different coupling of dissolved amino acid, protein, and carbohydrate turnover to heterotrophic picoplankton production in the Southern Ocean in austral summer and fall
Different coupling of dissolved amino acid protein carbohydrate turnover heterotrophic picoplankton production Southern Ocean in austral summer and fall
2014/4/22
We assessed growth dynamics of heterotrophic picoplankton and concentrations and turnover of dissolved protein, amino acids, and neutral monosaccharides in the Atlantic sector of the Southern Ocean in...
Variation in the transfer of energy in marine plankton along a productivity gradient in the Atlantic Ocean
the transfer of energy marine plankton productivity gradient Atlantic Ocean
2014/5/5
Plankton play a key role in oceanic carbon flux as the primary biological mechanism for the sequestration of carbon out of the atmosphere into surface waters. The transfer of energy between phytoplank...
Effects of dust deposition and river discharges on trace metal composition of Trichodesmium spp. in the tropical and subtropical North Atlantic Ocean
dust deposition river discharges trace metal composition Trichodesmium spp. tropical subtropical North Atlantic Ocean
2014/5/4
We present the elemental composition (Al, Cd, Co, Cu, Fe, Mn, Mo, Ni, V, Zn, and P) of field-collected Trichodesmium populations. To distinguish the effects of river discharges (Amazon and Niger River...
Response of Southern Ocean phytoplankton and bacterioplankton production to short-term experimental warming
Southern Ocean phytoplankton bacterioplankton production short-term experimental warming
2014/5/4
We examined the potential response of Southern Ocean pelagic ecosystems to warming through changes in total primary production (particulate plus dissolved = PPP + DPP) and bacterial production (BP), d...
Presence and regulation of alkaline phosphatase activity in eukaryotic phytoplankton from the coastal ocean: Implications for dissolved organic phosphorus remineralization
Presence and regulation alkaline phosphatase activity eukaryotic phytoplankton the coastal ocean Implications for dissolved organic phosphorus remineralization
2014/5/4
The biologically important constituents of the dissolved organic phosphorus (DOP) pool, their bioavailability, and their cycling in coastal systems are still poorly understood. Here we use the enzyme ...
On the nonlinear relationship between dissolved cadmium and phosphate in the modern global ocean: Could chronic iron limitation of phytoplankton growth cause the kink?
On the nonlinear relationship dissolved cadmium and phosphate the modern global ocean chronic iron limitation phytoplankton growth
2014/5/4
I report two vertical profiles of dissolved cadmium (Cd) and phosphate (PO4) from the Bering Sea: one from a high-nutrient, low-chlorophyll (HNLC) area, in which phytoplankton growth is limited by iro...
Different reactions of Southern Ocean phytoplankton size classes to iron fertilization
Different reactions Southern Ocean phytoplankton size classes iron fertilization
2014/5/4
During the European Iron Fertilisation Experiment (EIFEX), performed in the Southern Ocean, we investigated the reactions of different phytoplankton size classes to iron fertilization, applying measur...
On the role of colloidal particles in light scattering in the ocean
colloidal particles light scattering in the ocean
2014/5/13
We calculated the optical scattering and backscattering coefficients for assemblages of marine colloids from the measured size distribution and the assumed refractive index of colloids. The comparison...
Response of copepods to physical gradients associated with structure in the ocean
Response of copepods physical gradients associated with structure the ocean
2014/5/13
We studied the response of the copepods Acartia tonsa and Temora longicornis to spatial gradients of flow velocity and fluid density to determine whether the presence of physical gradients initiated l...
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...
Wide-ranging abundances of aerobic anoxygenic phototrophic bacteria in the world ocean revealed by epifluorescence microscopy and quantitative PCR
aerobic anoxygenic phototrophic bacteria world ocean revealed epifluorescence microscopy quantitative PCR
2014/5/9
Reports that aerobic anoxygenic phototrophic bacteria (AAnPB) containing bacteriochlorophyll a (BChla) constitute 10% or more of total bacteria cell counts in seawater prompted us to quantify AAnPB ab...
Biogeochemical cycling in the oligotrophic ocean: Redfield and non-Redfield models
Biogeochemical cycling oligotrophic ocean Redfield non-Redfield models
2014/5/9
The assumption of fixed elemental ratios in ocean biogeochemical models was tested using the Hawaii Ocean Time-Series data set from the subtropical North Pacific Ocean, where nutrient-starvation is a ...
Particle export during the Southern Ocean Iron Experiment (SOFeX)
Particle export Southern Ocean Iron Experiment
2014/5/8
We studied the effect of iron addition on particle export in the Southern Ocean by measuring changes in the distribution of thorium-234 during a 4-week iron (Fe) enrichment experiment conducted in the...
Growth rates, half saturation constants, and silicate, nitrate, and phosphate depletion in relation to iron availability of four large open-ocean diatoms from the Southern Ocean
Growth rates half saturation constants silicate, nitrate phosphate depletion relation to iron availability four large open-ocean diatoms Southern Ocean
2014/5/19
Four large, open-ocean diatoms from the Southern Ocean (Actinocyclus sp., Thalassiosira sp., Fragilariopsis kerguelensis, and Corethron pennatum) were grown in natural (low iron) Southern ocean seawat...
The heterotrophic bacterial response during the Southern Ocean Iron Experiment (SOFeX)
The heterotrophic bacterial response Southern Ocean Iron Experiment SOFeX
2014/5/19
We studied heterotrophic bacterial dynamics as part of the Southern Ocean Iron Experiment (SOFeX), January-February 2002. Two phytoplankton blooms were monitored following infusions with iron sulfate ...