搜索结果: 1-13 共查到“海洋地质学 cycling”相关记录13条 . 查询时间(0.187 秒)
Seasonal change in microbial sulfur cycling in monomictic Lake Fukami-ike, Japan
Seasonal change microbial sulfur cycling monomictic Lake Fukami-ike Japan
2014/4/3
Sulfur budgets and seasonal progression of sulfur cycling processes were investigated in Lake Fukami-ike, a small monomictic lake in Japan. The sulfur isotopic mass balance shows that the main sulfur ...
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...
Mercury and methylmercury cycling in sediments of the mid-Atlantic continental shelf and slope
Mercury methylmercury cycling slope
2014/4/17
We present a detailed study of the biogeochemical factors controlling mercury (Hg) distribution,
methylmercury (MeHg) production, and MeHg efflux in sediments of the mid-Atlantic continental shelf an...
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...
Photobiogeochemical cycling of carbon monoxide in the southeastern Beaufort Sea in spring and autumn
Photobiogeochemical cycling the southeastern Beaufort Sea
2014/4/17
We investigated the distribution, photoproduction, microbial uptake, and air–sea exchange of carbon
monoxide (CO), a key photoproduct of chromophoric dissolved organic matter (CDOM), in open waters o...
Role of phytoplankton in mercury cycling in the San Francisco Bay estuary
Role of phytoplankton he San Francisco Bay estuary
2014/4/17
To study the role of phytoplankton in mercury cycling, we measured methylmercury (MeHg) and total
mercury (HgT) in surface waters during the spring 2003 phytoplankton bloom in San Francisco Bay. Cond...
Probing the microenvironment of freshwater sediment macrofauna: Implications of deposit-feeding and bioirrigation for nitrogen cycling
freshwater sediment macrofauna bioirrigation for nitrogen cycling
2014/5/5
The effect of sediment-dwelling macrofauna on nitrifying bacteria was investigated by direct probing in their
overlapping habitat, i.e., the upper few millimeters of freshwater sediments. Microsensor...
Nitrogen sources and cycling in the San Francisco Bay Estuary: A nitrate dual isotopic composition approach
Nitrogen sources cycling San Francisco Bay Estuary nitrate dual isotopic composition
2014/5/4
We used the dual isotopic composition of nitrate (δ15N and δ18O) within the estuarine system of San Francisco (SF) Bay, California, to explore the utility of this approach for tracing sources and cycl...
Cycling of calcite in hard water lakes of different trophic states
Cycling of calcite hard water lakes different trophic states
2014/5/4
Based on oxygen (O2), pH, calcium (Ca2+), and carbonate (CO32-) sediment pore-water concentration profiles, we compare the benthic dissolution of autochthonous calcite in oligotrophic Lake Lucerne and...
Extreme 13C enrichments in a shallow hypereutrophic lake: Implications for carbon cycling
Extreme 13C enrichment shallow hypereutrophic lake carbon cycling
2014/5/19
An analysis of stable carbon isotope (δ13C) ratios in Lake Apopka, Florida, reveals extreme 13C enrichments of dissolved inorganic carbon (DIC) pools in the water column and sediment pore water of thi...
Seasonal variation of the d13C and d15N of particulate and dissolved carbon and nitrogen in Lake Lugano: Constraints on biogeochemical cycling in a eutrophic lake
Seasonal variation d13C and d15N particulate and dissolved carbon and nitrogen Lake Lugano biogeochemical cycling a eutrophic lake
2014/5/14
We determined the δ13C and δ15N of water-column particulate organic matter (POM), dissolved inorganic carbon, and nitrate, together with water chemistry and phytoplankton biomass and species compositi...
Acetate cycling in the water column of the Cariaco Basin: Seasonal and vertical variability and implication for carbon cycling
Acetate cycling in the water column Cariaco Basin Seasonal and vertical variability carbon cycling
2014/5/27
Acetate oxidation frequently has been used as proxy of organic carbon decomposition in marine anoxic sediments. However, the importance of acetate uptake in carbon cycling in marine anoxic water colum...
Iron-sulfur-phosphorus cycling in the sediments of a shallow coastal bay: Implications for sediment nutrient release and benthic macroalgal blooms
Iron-sulfur-phosphorus cycling in the sediments shallow coastal bay:sediment nutrient release benthic macroalgal blooms
2014/5/26
We conducted a study to determine the seasonal relationship between iron, sulfur, and phosphorus in the upper sediments and pore waters of a shallow intercoastal bay. From April 1999 to September 2000...