搜索结果: 1-15 共查到“海洋科学 Stable isotope”相关记录22条 . 查询时间(0.118 秒)
Stable isotope estimates of evaporation : inflow and water residence time for lakes across the United States as a tool for national lake water quality assessments
inflow water residence
2014/11/28
We used water d2H and d18O from ca. 1000 lakes sampled in the 2007 U.S. Environmental Protection Agency’s
National Lakes Assessment (NLA) to assess two hydrological variables—evaporation as a percent...
Midwater zooplankton and suspended particle dynamics in the North Pacific Subtropical Gyre: A stable isotope perspective
North Pacific Subtropical Gyre Midwater zooplankton
2014/4/2
We used amino acid (AA) compound-specific isotope analysis (d15NAA and d13
CAA values) of midwater
zooplankton and suspended particles to examine their dynamics in the mesopelagic zone. Suspended pa...
Sulfur stable isotope indicators of residency in estuarine fish
Sulfur stable isotope indicators of residency estuarine fish
2014/4/4
Estuarine fish may remain as residents in areas with favorable conditions for feeding and refuge, but become mobile and transient where conditions are less favorable. We developed a new approach invol...
Characterization of stable isotope fractionation during methane production in the sediment of a eutrophic lake, Lake Dagow, Germany
stable isotope fractionation methane production in the sediment eutrophic lake Lake Dagow Germany
2014/4/18
We measuredd13CofCO2,CH4, and acetate-methyl in profundal sediment of eutrophic Lake Dagow by incubation experiments in the presence and absence of methanogenic inhibitors chloroform, bromoethane sulf...
Temporal shift in nutrient input to cold-seep food webs revealed by stable-isotope signatures of associated communities
cold-seep food webs Temporal shift
2014/4/17
A pattern of succession has been demonstrated at Gulf of Mexico cold seeps proceeding from a high-biomass
endemic community dominated by grazers to a diverse community of endemic and nonendemic speci...
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...
Sea fan corals provide a stable isotope baseline for assessing sewage pollution in the Mexican Caribbean
Sea fan corals provide a stable isotope baseline sewage pollution the Mexican Caribbean
2014/4/16
We compared stable nitrogen isotope (d15N) values from the common Caribbean sea fanGorgonia ventalina,collected from a developed and undeveloped coastline, to test the hypothesis that sewage-derived n...
Stable isotope fractionation during the methanogenic degradation of organic matter in the sediment of an acidic bog lake, Lake Grosse Fuchskuhle
Stable isotope fractionation during the methanogenic degradation of organic matter in the sediment an acidic bog lake Lake Grosse Fuchskuhle
2014/4/16
Lake Grosse Fuchskuhle is an acidic bog lake, which develops an anoxic hypolimnion during the summer season, so that sediment organic matter is degraded anaerobically to CH4and CO2. The d13 C values o...
A standard protocol for stable isotope analysis of zooplankton in aquatic food web research using mass balance correction models
stable isotope analysis zooplankton
2014/4/22
Stable isotope analysis has become a crucial tool for aquatic food web ecologists, but a lack of methodological
standardization hinders comparisons between studies. One methodological inconsistency i...
Trichodesmium in the western Gulf of Mexico: 15N2 -fixation and natural abundance stable isotope evidence
Trichodesmium natural abundance stable isotope
2014/4/22
Surface aggregations of the diazotrophic cyanobacterium Trichodesmium were encountered at nearly every
station along a 300-km transect in the northwestern Gulf of Mexico during July 2000. 15N2-fixati...
Characterization of methanogenic Archaea and stable isotope fractionation during methane production in the profundal sediment of an oligotrophic lake (Lake Stechlin, Germany)
methanogenic Archaea stable isotope fractionation during methane production profundal sediment an oligotrophic lake
2014/4/22
The methanogenic archaeal community, methane production, and carbon isotopic fractionation were studied in the profundal sediments of oligotrophic Lake Stechlin. Because the water column of oligotroph...
The trophic significance of bacterial carbon in a marine intertidal sediment: Results of an in situ stable isotope labeling study
bacterial carbon a marine intertidal sediment situ stable isotope labeling
2014/5/5
We report the results of an in situ tracer experiment in an intertidal sediment, where bacterial carbon was tagged with stable carbon-isotope label, after the injection of 13C-glucose. The appearance ...
Changes in carbon stable isotope ratios during periphyton development
carbon stable isotope ratios periphyton development
2014/5/5
Stable isotopes are widely used to infer trophic relationships with little attention paid to temporal variability at the base of the food web. We examined changes in the carbon-stable isotope composit...
Stable isotope signatures of benthic invertebrates in arctic lakes indicate limited coupling to pelagic production
Stable isotope signatures benthic invertebrates
2014/4/23
We tested the hypotheses that benthic macroinvertebrates, especially chironomid larvae in the Tribe Chironomini,
from small oligotrophic arctic lakes are only weakly linked to pelagic food sources, a...
Tissue carbon, nitrogen, and sulfur stable isotope turnover in transplanted Bathymodiolus childressi mussels: Relation to growth and physiological condition
Tissue carbon nitrogen sulfur stable isotope turnover transplanted Bathymodiolus childressi mussels growth and physiological condition
2014/5/19
The growth and physiological condition of the methanotrophic hydrocarbon seep mussel Bathymodiolus childressi reflects the habitat quality of the sites it occupies on the seafloor of the upper Louisia...