搜索结果: 1-15 共查到“海洋地质学 Nitrogen”相关记录31条 . 查询时间(0.631 秒)
A Decade of Directly Measured Sediment N2 Fluxes:What Can Narragansett Bay Tell Us About the Global Ocean Nitrogen Budget?
Directly Measured Sediment N2 Fluxes Narragansett Bay Global Ocean Nitrogen Budget
2015/7/17
The tight coupling between nitrogen and carbon cycling has important implications for global climate. These two cycles are under growing anthropogenic pressures (e.g., warming temperatures, changes in...
Multiple Sources and Forms of Nitrogen Sustain Year-Round Kelp Growth on the Inner Continental Shelf of the Santa Barbara Channel
Nitrogen Sustain Year-Round Kelp Growth Santa Barbara Channel
2015/7/16
Forests of the giant kelp Macrocystis pyrifera found on coastal rocky reefs lack the large reservoirs for nutrient storage found in many terrestrial environments. Supporting their high year-round grow...
Stoichiometric imbalance in rates of nitrogen and phosphorus retention, storage, and recycling can perpetuate nitrogen deficiency in highly-productive reservoirs
nitrogen phosphorus retention storage
2014/11/28
We measured the nutrient stoichiometry of inputs, outputs, retention, storage, and recycling in three seasonally
nitrogen (N)-deficient reservoirs by incorporating watershed mass balances with measur...
Changes in the vertical distribution of primary production in response to land-based nitrogen loading
Terrestrial nitrogen load production
2014/10/16
Changes in the vertical distribution of primary production in response to land-based nitrogen loading。
Hypoxic events stimulate nitrogen recycling in a shallow salt-wedge estuary: The Yarra River estuary, Australia
Hypoxic events stimulate nitrogen recycling a shallow salt-wedge estuary The Yarra River estuary Australia
2014/4/3
The Yarra River estuary is a salt-wedge estuary prone to periods of stratification-induced anoxia and hypoxia(O2,100mmol L21) during low-flow events. Nitrate reduction pathways were examined using the...
Latitudinal distribution of diazotrophs and their nitrogen fixation in the tropical and subtropical western North Pacific
Latitudinal distribution diazotrophs nitrogen fixation the tropical subtropical western North Pacific
2014/4/18
Latitudinal distribution of diazotrophs and their nitrogen (N2) fixation activity were investigated in the western North Pacific in winter (Nov to Dec 2004) and summer (May to Jun 2005) along meridion...
Production of nitrogen gas via anammox and denitrification in intact sediment cores along a continental shelf to slope transect in the North Atlantic
Production of nitrogen gas anammox denitrification intact sediment cores a continental shelf slope transect the North Atlantic
2014/4/17
We measured the production of N2 gas from anammox and denitrification simultaneously in intact sediment cores at six sites along a transect of the continental shelf (50 m) and deeper slope (2000 m) in...
Temporal and spatial variability in the cycling of nitrogen within a constructed wetland: A whole-system stable-isotope-addition experiment
Temporal spatial variability in the cycling of nitrogen a constructed wetland A whole-system stable-isotope-addition experiment
2014/4/17
Constructed wetlands attenuate effluent nutrients, are hydrodynamically well defined, and are a useful proxy for the study of nitrogen (N) transformation in eutrophic natural systems. A whole-system s...
Seasonally varying nitrogen isotope biogeochemistry of particulate organic matter in Lake Kinneret, Israel
Seasonally varying nitrogen isotope particulate organic matter
2014/4/17
Large temporal variations in the nitrogen isotopic composition (d15N) of particulate organic matter (POM)
and dissolved inorganic nitrogen (DIN) species in Lake Kinneret occurred in response to seaso...
Long-term 15N-nitrogen retention in tidal freshwater marsh sediment: Elucidating the microbial contribution
Long-term 15N-nitrogen retention Elucidating the microbial contribution
2014/4/17
The long-term retention of nitrogen in sediment of a tidal freshwater marsh in the Scheldt estuary (Belgium)
was investigated by an in situ 15N-labeling experiment. Sediment of an unvegetated creek b...
Assimilatory uptake rather than nitrification and denitrification determines nitrogen removal patterns in streams of varying land use
Assimilatory uptake nitrification denitrification deter nitrogen removal patterns in streams of varying land use
2014/4/18
Agricultural and urban land use increase nitrogen (N) concentrations in streams, which can saturate biotic demand by plants, algae, and bacteria via assimilative uptake, and by nitrification and denit...
Nitrogen dynamics in grassland streams along a gradient of agricultural development
Nitrogen dynamics grassland streams gradient of agricultural development
2014/4/22
We examined nitrogen (N) uptake in seven grassland streams lying in catchments along a gradient (0-84%) of agricultural land use in New Zealand using a stable isotope (15N) addition of NH4+ to quantif...
Nitrogen and oxygen isotopic signatures of subsurface nitrate seaward of the Florida Keys reef tract
Nitrogen oxygen isotopic signatures subsurface nitrate seaward Florida Keys reef tract
2014/4/22
Hydrographic and nutrient structure and the nitrogen and oxygen isotopic compositions (d15N and d18O) of the nitrate pool seaward of the Florida Keys reef tract were measured in Summer 2003. Nitrate a...
The influence of the balance of inorganic and organic nitrogen on the trophic dynamics of microbial food webs
the balance of inorganic organic nitrogen
2014/4/22
A nutrient-manipulation mesocosm study was conducted in Norwegian coastal waters to determine the effect
on a nitrogen-limited microbial food web of changes in the relative concentrations of dissolve...
Groundwater-transported dissolved organic nitrogen exports from coastal watersheds
Groundwater-transported dissolved organic nitrogen exports coastal watersheds
2014/5/5
We analyzed groundwater-transported nitrogen (N) exports from 41 watershed segments that comprised 10 Cape Cod, Massachusetts watersheds to test the hypotheses that chemical form of N exports is relat...