Now showing items 11-20 of 867
Production of cobalt binding ligands in a Synechococcus feature at the Costa Rica upwelling dome
The Costa Rica upwelling dome (CRD; ~8.67ºN and 90.6ºW) was characterized chemically for cobalt and nickel abundances and speciation, and biologically using cyanobacterial abundances and phylogeny. Total dissolved cobalt ...
Radiocarbon constraint on relict organic carbon contributions to Ross Sea sediments
(American Geophysical Union, 2006-04-19)
We estimate the relative contribution of relict organic matter to the acid-insoluble organic carbon (AIOC) fraction of surface sediments from Ross Sea, Antarctica, on the basis of 14C abundance. The bulk isotopic ...
Bioaccumulation and trophic transfer of methylmercury in Long Island Sound
Humans are exposed to methylmercury (MeHg) principally by consumption of marine fish. The coastal zone supports the majority of marine fish production, and may therefore be an important source of MeHg to humans; however, ...
Carbon isotope composition of organic compounds produced by abiotic synthesis under hydrothermal conditions
Although it is widely believed that production of organic compounds by Fischer-Tropsch synthesis and related processes occurs in many geologic environments, unambiguous identification of compounds with an abiotic origin ...
S-33 constraints on the seawater sulfate contribution in modern seafloor hydrothermal vent sulfides
Sulfide sulfur in mid-oceanic ridge hydrothermal vents is derived from leaching of basaltic-sulfide and seawater-derived sulfate that is reduced during high temperature water rock interaction. Conventional sulfur isotope ...
A decade of synthesis and modeling in the US Joint Global Ocean Flux Study
A decade long Synthesis and Modeling Project (SMP) was conducted as the final element of the U.S. Joint Global Ocean Flux Study (JGOFS). The SMP goal was to synthesize knowledge gained from field studies into a set of ...
Oceanography : plankton in a warmer world
Satellite data show that phytoplankton biomass and growth generally decline as the oceans’ surface waters warm up. Is this trend, seen over the past decade, a harbinger of the future for marine ecosystems?
Long-term biological effects of petroleum residues on fiddler crabs in salt marshes
In September 1969,the Florida barge spilled 700,000 L of No. 2 fuel oil into the salt marsh sediments of Wild Harbor (Buzzards Bay, MA). Today the aboveground environment appears unaffected, but a substantial amount of ...
Stable isotopic evidence in support of active microbial methane cycling in low-temperature diffuse flow vents at 9°50’N East Pacific Rise
A unique dataset from paired low- and high-temperature vents at 9°50’N East Pacific Rise provides insight into the microbiological activity in low-temperature diffuse fluids. The stable carbon isotopic composition of CH4 ...
Floating oil-covered debris from Deepwater Horizon : identification and application
(IOP Publishing, 2012-01-18)
The discovery of oiled and non-oiled honeycomb material in the Gulf of Mexico surface waters and along coastal beaches shortly after the explosion of Deepwater Horizon sparked debate about its origin and the oil covering ...