搜索结果: 61-75 共查到“海洋科学 carbon”相关记录255条 . 查询时间(0.133 秒)
A mechanistic-based framework to understand how dissolved organic carbon is processed in a large fluvial lake
bacterial growth primary production hydrodynamic regime photodegradation residence time ecosystem-based model
2014/4/1
Dissolved organic carbon (DOC) plays a fundamental role in the ecology of aquatic systems. Our current
understanding of the DOC dynamic in fluvial systems, however, is mostly based on empirical...
Phosphatases relieve carbon limitation of microbial activity in Baltic Sea sediments along a redox-gradient
carbon limitation Baltic Sea sediments
2014/4/4
The relationship between phosphatase activity and the element limiting microbial activity (carbon [C], nitrogen
[N], or phosphorus [P]) was studied experimentally in sediment from four stations in th...
Carbon self-utilization may assist Caulerpa taxifolia invasion
Carbon self-utilization assist Caulerpa taxifolia invasion
2014/4/4
Additions of 13C-labeled macroalgal detritus (Caulerpa taxifolia) and seagrass detritus (Zostera capricorni) to a vegetated intertidal mudflat in subtropical Australia provided insight into the mechan...
ntarctic krill as a source of dissolved organic carbon to the Antarctic ecosystem
ntarctic kril dissolved organic carbon Antarctic ecosystem
2014/4/4
The role of krill as a source of dissolved organic matter in the Southern Ocean was tested through a series of
experiments performed around the Antarctic Peninsula. These experiments revealed high bu...
Functional response of carbon absorption efficiency in the pelagic calanoid copepod Acartia tonsa
Functional response carbon absorption efficiency the pelagic calanoid copepod Acartia tonsa
2014/4/17
We constructed a general relationship between prey concentration and absorption efficiency (AE; previously termed assimilation efficiency) in the cosmopolitan calanoid copepod Acartia tonsa. The relat...
Carbon acquisition byTrichodesmium: The effect of pCO2and diurnal changes
Carbon acquisition Trichodesmium pCO2 diurnal changes
2014/4/18
We investigated carbon acquisition by the N2-fixing cyanobacterium TrichodesmiumIMS101 in response to CO2levels of 15.1, 37.5, and 101.3 Pa (equivalent to 150, 370, and 1000 ppm). Inthese acclimations...
Mineralization pathways in lake sediments with different oxygen and organic carbon supply
Mineralization pathways lake sediments different oxygen organic carbon supply
2014/4/17
The intensity and pathways of mineralization of sedimentary organic matter were investigated in eutrophic Lake Zug, Switzerland. In a depth transect (25–180 m) from oxic to anoxic bottom water we reco...
Carbon cycling within epilithic biofilm communities across a nutrient gradient of headwater streams
Carbon cycling within epilithic biofilm communities across a nutrient gradient headwater streams
2014/4/17
Primary production (PP), nutrient uptake, and carbon (C) cycling within epilithic biofilm communities were assessed in four headwater streams in the Arkansas Ozarks, U.S.A., representing a hundred-fol...
Carbon isotope composition of fatty acids and sterols in the scleractinian coral Turbinaria reniformis: Effect of light and feeding
Carbon isotope composition fatty acids sterols the scleractinian coral Turbinaria reniformis: Effect of light and feeding
2014/4/17
The effect of auto- and heterotrophy on the carbon isotope composition (d13C) of fatty acids (FA) and sterols was studied in the scleractinian coralTurbinaria reniformis. Colonies were maintained in a...
Organic carbon burial efficiency in lake sediments controlled by oxygen exposure time and sediment source
Organic carbon burial efficiency lake sediments controlled oxygen exposure time sediment source
2014/4/17
We compared the burial efficiency of organic carbon (buried OC : depositedOC) in a diverse set of 27 different sediments from 11 lakes, focusing on the potential effects of organic matter source, oxyg...
The effects of elevated carbon dioxide concentrations on the metamorphosis, size, and survival of larval hard clams (Mercenaria mercenaria), bay scallops (Argopecten irradians), and Eastern oysters (Crassostrea virginica)
elevated carbon dioxide concentrations the metamorphosis size survival of larval hard clams bay scallops Eastern oysters
2014/4/17
We present experiments that examined the metamorphosis, growth, and survivorship of larvae from three species of commercially and ecologically valuable shellfish (Mercenaria mercenaria, Argopecten irr...
The cold-water coral community as a hot spot for carbon cycling on continental margins: A food-web analysis from Rockall Bank (northeast Atlantic)
The cold-water coral community carbon cycling continental margins: A food-web analysis Rockall Bank
2014/4/17
We present a quantitative food-web analysis of the cold-water coral community, i.e., the assembly of living corals, dead coral branches and sediment beneath, associated with the reef-buildingLophelia ...
Climate variation, carbon flux, and bioturbation in the abyssal North Pacific
Climate variation carbon flux bioturbation abyssal North Pacific
2014/4/17
We hypothesized that seasonal and interannual climate-mediated changesin particulate organic carbon (POC) flux would affect bioturbation and ultimately the sequestration of organic carbon in the deep ...
The role of net community production in air–sea carbon fluxes at the North Pacific subarctic–subtropical boundary region
air–sea carbon fluxes net community production
2014/4/17
The North Pacific subarctic–subtropical boundary region is an important sink for atmospheric CO2
, with high
annual influx relative to surrounding waters and large seasonal variability. The location...
Contribution of picophytoplankton to carbon export in the equatorial Pacific: A reassessment of food web flux inferences from inverse models
Contribution of picophytoplankton equatorial Pacific
2014/4/17
The paradigm that carbon export is derived almost exclusively from the primary production of large
phytoplankton has been challenged by inverse ecosystem modeling studies that suggest that most carbo...