搜索结果: 1-15 共查到“地球科学总论 nutrient”相关记录15条 . 查询时间(0.882 秒)
Temporal responses of coastal hypoxia to nutrient loading and physical controls
Temporal responses coastal hypoxia nutrient loading physical controls
2010/1/21
The incidence and intensity of hypoxic waters in coastal aquatic ecosystems has been expanding in recent decades coincident with eutrophication of the coastal zone. Worldwide, there is strong interest...
Chinese rivers deliver about 5–10% of global freshwater input and 15–20% of the global continental sediment to the world ocean. We report the riverine fluxes and concentrations of major nutrients (nit...
The influence of hypercapnia and the infaunal brittlestar Amphiura filiformis on sediment nutrient flux – will ocean acidification affect nutrient exchange?
hypercapnia brittlestar Amphiura filiformis sediment nutrient flux ocean acidification
2010/1/21
Rising levels of atmospheric carbon dioxide and the concomitant increased uptake of this by the oceans is resulting in hypercapnia-related reduction of ocean pH. Research focussed on the direct effect...
Primary production during nutrient-induced blooms at elevated CO2 concentrations
Primary production nutrient-induced blooms elevated CO2 concentrations
2010/1/20
A CO2 enrichment experiment (PeECE III) was carried out in 9 mesocosms in which the seawater carbonate system was manipulated to achieve three different levels of pCO2. At the onset of the experimenta...
The significance of organic carbon and nutrient export from peatland-dominated landscapes subject to disturbance,a stoichiometric perspective
organic carbon and nutrient export peatland-dominated landscapes stoichiometric perspective
2010/1/19
The terrestrial-aquatic interface is a crucial environment in which to consider the fate of exported terrestrial carbon in the aquatic system. Here the fate of dissolved organic carbon (DOC) may be co...
CO2 enrichment increases nutrient leaching from model forest ecosystems in subtropical China
CO2 enrichment nutrient leaching model forest ecosystems subtropical China
2010/1/18
The effect of high atmospheric CO2 concentrations on the dynamics of mineral nutrient is not well documented, especially for subtropical China. We used model forest ecosystems in open-top chambers to ...
Marine ecosystem community carbon and nutrient uptake stoichiometry under varying ocean acidification during the PeECE III experiment
Marine ecosystem community carbon nutrient uptake stoichiometry ocean acidification
2010/1/18
Changes to seawater inorganic carbon and nutrient concentrations in response to the deliberate CO2 perturbation of natural plankton assemblages were studied during the 2005 Pelagic Ecosystem CO2 Enric...
Carbon and nutrient mixed layer dynamics in the Norwegian Sea
Carbon nutrient mixed layer dynamics Norwegian Sea
2010/1/18
A coupled carbon-ecosystem model is compared to recent data from Ocean Weather Station M (66° N, 02° E) and used as a tool to investigate nutrient and carbon processes within the Norwegian Sea. Nitrat...
Effects of increased atmospheric CO2 on small and intermediate sized osmotrophs during a nutrient induced phytoplankton bloom
atmospheric CO2 intermediate sized osmotrophs nutrient induced phytoplankton bloom
2010/1/15
We report the transient population dynamic response of the osmotrophic community initiated by a nutrient pulse in mesocosms exposed to different pCO2 levels. Differences in phytoplankton and heterotro...
Response of marine viral populations to a nutrient induced phytoplankton bloom at different pCO2 levels
marine viral populations nutrient induced phytoplankton bloom pCO2 levels
2010/1/15
During the PeECE III mesocosm experiment in 2005 we investigated how the virioplankton community responded to increased levels of nutrients (N and P) and CO2. We applied a combination of flow cytometr...
Nutrient limitation of primary productivity in the Southeast Pacific (BIOSOPE cruise)
Nutrient limitation primary productivity Southeast Pacific
2010/1/15
Iron is an essential nutrient involved in a variety of biological processes in the ocean, including photosynthesis, respiration and dinitrogen fixation. Atmospheric deposition of aerosols is recognize...
Two High-Nutrient Low-Chlorophyll phytoplankton assemblages:the tropical central Pacific and the offshore Perú-Chile Current
High-Nutrient Low-Chlorophyll phytoplankton assemblages tropical central Pacific offshore Perú-Chile Current
2010/1/15
The phytoplankton (>15 μm) composition and abundance was investigated along a ~8000 km transect between the Marquesas Islands Archipelago and the Chilean coasts off Concepción. In the southern limit o...
Assessment of nutrient entry pathways and dominating hydrological processes in lowland catchments
nutrient entry pathways hydrological processes lowland catchments
2010/1/27
The achievement of a good water quality in all water bodies until 2015 is legally regulated since December 2000 for all European Union member states by the European Water Framework Directive (EU, 2000...
Nitrogen assimilation and short term retention in a nutrient-rich tidal freshwater marsh – a whole ecosystem 15N enrichment study
Nitrogen assimilation short term retention nutrient-rich tidal freshwater marsh
2010/1/14
An intact tidal freshwater marsh system (3477 m2) was labelled by adding 15N-ammonium as a tracer to the flood water inundating the ecosystem. The appearance and retention of 15N-label in different ma...
Multi-nutrient,multi-group model of present and future oceanic phytoplankton communities
Multi-nutrient multi-group model oceanic phytoplankton communities
2010/1/13
Phytoplankton community composition profoundly affects patterns of nutrient cycling and the dynamics of marine food webs; therefore predicting present and future phytoplankton community structure is c...