搜索结果: 1-15 共查到“海洋地质学 organic matter”相关记录23条 . 查询时间(0.236 秒)
Basin scale distribution of chromophoric dissolved organic matter in thePacific Ocean
Basin scale distribution chromophoric dissolved organic matter the Pacific Ocean
2014/4/18
Chromophoric dissolved organic matter (CDOM) was surveyed along the 160uW transect from the equatorial to the subarctic Pacific. CDOM characteristics were evaluated through the measurement of fluoresc...
Characteristics and sources of chromophoric dissolved organic matter in lakes of the Yungui Plateau, China, differing in trophic state and altitude
Characteristics sources of chromophoric dissolved
2014/4/17
The high-mountain lakes on the Yungui Plateau in China are exposed to high-intensity ultraviolet radiation, and
contain low concentrations of chromophoric dissolved organic matter (CDOM). We determin...
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...
Contrasting the influences of stream inputs and landscape position on bacterioplankton community structure and dissolved organic matter composition in high-elevation lake chains
Contrasting landscape position
2014/4/18
We examined bacterioplankton community composition (BCC; using polymerase chain reaction-based
phylogenetic fingerprinting) and the composition of dissolved organic matter (DOM; using scanning fluoro...
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...
Evidence of prokaryotic metabolism on suspended particulate organic matter in the dark waters of the subtropical North Atlantic
prokaryotic metabolism particulate organic matter
2014/4/17
The distribution of prokaryotic abundance (PA), respiratory activity (ETS), heterotrophic production (PHP),
and suspended particulate (POM) and dissolved (DOM) organic matter was determined in the me...
Increases in the longwave photobleaching of chromophoric dissolved organic matter in coastal waters
longwave photobleaching chromophoric dissolved organic matter
2014/4/17
Salinity effects on the photobleaching of chromophoric dissolved organic matter (CDOM) due to coastal
mixing were investigated through a comparative study of surrogate and surface-water CDOM. Suwanne...
Controls on the seasonal and interannual dynamics of organic matter stable carbon isotopes in mesotrophic Lake Holzmaar, Germany
interannual dynamics mesotrophic Lake Holzmaar Germany
2014/4/17
We investigated the particulate organic matter (POM) flux and its stable carbon isotope composition in
response to changes in phytoplankton primary production and abiotic environmental affects in mes...
Sources and transport of terrestrial organic matter in Vancouver Island fjords and the Vancouver–Washington Margin: A multiproxy approach usingd13Corg, lignin phenols, and the ether lipid BIT index
terrestrial organic matter Vancouver Island fjords the Vancouver–Washington Margin multi proxy approach d13 Corg lignin phenols ether lipid BIT index
2014/4/21
The Branched and Isoprenoid Tetraether (BIT) index (a ratio of marine and terrestrial glycerol dialkyl glycerol tetraether [GDGT] membrane lipids) was recently introduced as a proxy for the fraction o...
Geochemical controls on anaerobic organic matter decomposition in a northern peatland
Geochemical controls anaerobic organic matter decomposition northern peatland
2014/4/18
The decomposition of deep peat deposits controls the long-term carbon balance of peatlands but is poorly understood with respect to rates and controls. To rectify this deficiency, we estimated in situ...
Tracing terrestrial organic matter byd34S andd13 C signatures in a subarctic estuary
terrestrial organic matter d34S d13 C signatures subarctic estuary
2014/4/18
A key issue to understanding the transformations of terrestrial organic carbon in the ocean is to disentangle the latter from marine-produced organic matter. We applied a multiple stable isotope appro...
Dinosterols or dinocysts to estimate dinoflagellate contributions to marine sedimentary organic matter?
Dinosterols dinocysts dinoflagellate marine sedimentary organic matter
2014/4/21
Dinosterol (4α,23,24-trimethyl-5α-cholest-22E-en-3β-ol) is frequently used as an alternative to dinoflagellate cyst (dinocyst) counting in paleoceanography to assess dinoflagellate inputs to marine se...
Characterization of transport and deposition of terrestrial organic matter in the southern North Sea using the BIT index
transport and deposition terrestrial organic matter southern North Sea BIT index
2014/5/5
We have applied a recently introduced proxy, the BIT (branched and isoprenoid tetraether) index, to determine terrestrial organic matter (TOM) transport from the rivers Rhine and Meuse and their tribu...
Riverine input of macronutrients, iron, and organic matter to the coastal ocean off Oregon, U.S.A., during the winter
Riverine input macronutrients iron organic matter ocean off Oregon U.S.A. during the winter
2014/5/5
Three cross-shelf transects were conducted off northern Oregon in February, 2003, coincident with flooding of Coast Range rivers, to assess the riverine impact on coastal ocean biogeochemistry. During...
Microbial production, utilization, and enzymatic degradation of organic matter in the upper trophogenic layer in the pelagial zone of lakes along a eutrophication gradient
Microbial production utilization enzymatic degradation
2014/4/30
The major aim of this study was to evaluate the relationships between the rates of microbial activities (phytoplankton primary production, bacterial secondary production, bacterial utilization of orga...