搜索结果: 1-15 共查到“海洋科学 ratios”相关记录31条 . 查询时间(0.093 秒)
Feeding rates and prey : predator size ratios of the nauplii and adult females of the marine cyclopoid copepod Oithona davisae
predator size Feeding rates and prey
2014/11/28
We studied the feeding behavior of the nauplii and adult females of the marine cyclopoid copepod Oithona
davisae in the laboratory. Functional response experiments showed that O. davisae can feed on ...
Influence of bottom water anoxia on nitrogen isotopic ratios and amino acid contributions of recent sediments from small eutrophic Lonar Lake, central India
nitrogen isotopic ratios Influence
2014/4/2
Lonar Lake is a eutrophic, saline soda lake with permanently anoxic deep water. The high pH and
deoxygenation result in very elevated d15N of suspended particulate matter (SPM) and sediments due to
...
Iron, phosphorus, and nitrogen supply ratios define the biogeography of nitrogen fixation
Iron phosphorus nitrogen fixation
2014/4/2
We present a unified conceptual framework describing the competition between diazotrophs and non–
nitrogen-fixing marine plankton and their interaction with three essential nutrient elements: nitroge...
Aerobic respiration and hypoxia in the Lower St. Lawrence Estuary: Stableisotope ratios of dissolved oxygen constrain oxygen sink partitioning
Aerobic respiration and hypoxia Lawrence Estuary dissolved oxygen constrain oxygen sink partitioning
2014/4/17
We measured the concentration and the stable isotope ratios of dissolved oxygen in the water column in the Estuary and Gulf of St. Lawrence to determine the relative importance of pelagic and benthic ...
Does predation control adult sex ratios and longevities in marine pelagic copepods?
predation contro adult sex ratios longevities marine pelagic copepods
2014/4/16
We assess the causes of adult sex ratio skew in marine pelagic copepods by examining changes in these ratios between the juveniles and adults, sexual differences in juvenile stage durations, and morta...
In this report, the potential for salt finger instability in the central water of the World Ocean is examined. The form of the temperature– salinity relationship determined from the Levitus climatolog...
The effects of Cu and Fe availability on the growth and Cu:C ratios of marine diatoms
The effects of Cu and Fe availability on the growth and Cu:C ratios of marine diatoms
2014/4/21
We investigated the effects of copper (Cu) and iron (Fe) availability on the growth rates, cellular Cu content, and steady-state Cu uptake rates of eight species of centric diatoms (coastal and oceani...
Spatial variations in time-integrated plankton metabolic rates in Sagami Bay using triple oxygen isotopes and O2 : Ar ratios
Spatial variations plankton metabolic rates
2014/4/21
Plankton metabolic rates, such as rates of gross, net community production and community respiration, were
measured in the surface waters using triple oxygen isotopes and O2
: Ar ratios. The 17
D a...
Absorption spectral slopes and slope ratios as indicators of molecular weight, source, and photobleaching of chromophoric dissolved organic matter
Absorption spectral slopes slope ratios indicators of molecular weight source photo bleaching chromo phoric dissolved organic matter
2014/4/21
A new approach for parameterizing dissolved organic matter (DOM) ultraviolet-visible absorption spectra is presented. Two distinct spectral slope regions (275–295 nm and 350–400 nm) within log-transfo...
The effects of Cu and Fe availability on the growth and Cu : C ratios of marinediatoms
Cu and Fe availability the growth Cu : C ratios marinediatoms
2014/4/18
We investigated the effects of copper (Cu) and iron (Fe) availability on the growth rates, cellular Cu content,and steady-state Cu uptake rates of eight species of centric diatoms (coastal and oceanic...
D/H ratios of fatty acids from marine particulate organic matter in the California Borderland Basins
fatty acid particulate organic matte California Borderland Basins
2014/4/8
We report the molecular and hydrogen–isotopic compositions of fatty acids extracted from suspended particulate
organic matter (POM) and surface sediments at three stations off the southern Cali...
CO2 control of Trichodesmium N2 fixation, photosynthesis, growth rates, and elemental ratios: Implications for past, present, and future ocean biogeochemistry
CO2 control Trichodesmium N2 fixation photosynthesis growth rates elemental ratios past present future ocean biogeochemistry
2014/4/22
Diazotrophic marine cyanobacteria in the genus Trichodesmium contribute a large fraction of the new nitrogen entering the oligotrophic oceans, but little is known about how they respond to shifts in g...
Partitioning of organic production in marine plankton communities: The effects of inorganic nutrient ratios and community composition on new dissolved organic matter
Partitioning of organic production marine plankton communities The effects of inorganic nutrient ratios community composition new dissolved organic matter
2014/4/23
We investigated the partitioning of carbon, nitrogen, and phosphorus between particulate and dissolved production using 11-m3 marine mesocosms (bags) in a Norwegian fjord with a salinity of 28.3, a ch...
Kinetics of phosphorus in Daphnia at different food concentrations and carbon:phosphorus ratios
Kinetics of phosphorus in Daphnia different food concentrations carbon:phosphorus ratios
2014/4/22
We examined the assimilation efficiency, excretion, and efflux of phosphorus (P) in adults and juveniles of Daphnia magna under different food levels (2-40 μg P L-1) and dietary carbon : phosphorus (C...
Stable isotopes in subtidal food webs: Have enriched carbon ratios in benthic consumers been misinterpreted?
subtidal food webs Have enriched carbon ratios
2014/5/5
We examined the hypothesis that the d13
C of benthic consumers is depleted in offshore, deeper waters where
kelp and benthic microalgae are absent by conducting three analyses: (1) we analyzed d13
...