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Bioactive trace Metal distributions and Biogeochemical controls in the Southern ocean
Metal distributions Biogeochemical controls
2015/7/15
Extensive sampling in many regions of the Southern Ocean has
demonstrated that surface water concentrations of dissolved Fe are low enough
to limit phytoplankton growth. In contrast, there is curr...
Metal Dispersion Resulting from Mining activities in coastal environments: a pathways approach
Metal Dispersion Resulting coastal environment
2015/7/14
Acid rock drainage (ARD) and disposal of tailings that result from
mining activities impact coastal areas in many countries. The dispersion of metals
from mine sites that are both proximal and dis...
Trace metal cycling in the deep water of the South China Sea: The composition, sources, and fluxes of sinking particles
Trace metal cycling in the deep water the South China Sea composition sources fluxes of sinking particles
2014/4/8
Moored sediment traps were deployed for 1 yr at depths of 120, 600, and 3500 m in the water column to investigate the trace metal (M) (Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn) composition, sources, ...
The influence of river plume dynamics on trace metal accumulation in calanoid copepods
iver plume dynamics calanoid copepods
2014/4/17
The concentrations of Ag, Cd, Cu, Hg(II), monomethylmercury (MeHg), Pb, and Zn were measured and
modeled in calanoid copepods collected from the Hudson River plume in April 2005 and May 2006. Copepod...
Trace metal cycling in the surface water of the South China Sea: Vertical fluxes, composition, and sources
Trace metal cycling the surface water the South China Sea: Vertical fluxes composition sources
2014/4/16
We deployed floating traps in the surface waters of the South China Sea on four occasions at depths of 30 m,100 m, and 160 m from 2006 to 2007 to quantify vertical metal fluxes in the surface water an...
Metal accumulation by heterotrophic marine bacterioplankton
heterotrophic marine bacterioplankton Metal accumulation
2014/4/16
Radioisotopes of six metals (54Mn, 55
Fe, 65
Zn, 109
Cd, 137
Cs, and 241Am) were used to assess the accumulation
of these metals by five species of heterotrophic marine bacteria in laboratory cul...
Explaining metal concentrations in sympatric Chironomus species
metal concentrations sympatric Chironomus species
2014/4/21
We compared metal concentrations in larvae of two Chironomusspecies (Chironomus staegeriandChironomus tigris) living in the same lake and at the same depth and time. Concentrations of the nonessential...
The trace-metal composition of size-fractionated plankton in the South China Sea: Biotic versus abiotic sources
size-fractionated plankton South China Sea
2014/4/22
We report the elemental composition (P, Si, Al, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn) in the size-fractionated
plankton and suspended particulate matter (SPM) in the surface waters of the South China Se...
Nov 10, 2006: The use of trace metals by modern organisms probably derives from changes in ancient ocean chemistry. The availability of trace metals is believed to have been brought about by the biolo...
Significance of subcellular metal distribution in prey in influencing the trophic transfer of metals in a marine fish
subcellular metal distribution in prey trophic transfer metals in a marine fish
2014/5/5
We investigated how the subcellular metal distribution in prey affects metal dietary assimilation in a marine fish, the grunt Terapon jarbua. The assimilation efficiency (AE) of metals (Cd, Se, and Zn...
Effects of dust deposition and river discharges on trace metal composition of Trichodesmium spp. in the tropical and subtropical North Atlantic Ocean
dust deposition river discharges trace metal composition Trichodesmium spp. tropical subtropical North Atlantic Ocean
2014/5/4
We present the elemental composition (Al, Cd, Co, Cu, Fe, Mn, Mo, Ni, V, Zn, and P) of field-collected Trichodesmium populations. To distinguish the effects of river discharges (Amazon and Niger River...
Phosphorus and trace metal limitation of algae and bacteria in Lake Superior
Phosphorus and trace metal algae and bacteria Lake Superior
2014/5/14
We performed a set of nutrient-enrichment bioassay experiments using metal-clean protocols, testing for macronutrient and micronutrient limitation of algae and bacteria in western Lake Superior. Our a...
Trace metal assimilation and release budget in Daphnia magna
Trace metal assimilation release budget Daphnia magna
2014/5/26
The assimilation efficiency (AE), efflux rate, and release budget of Cd, Cr(III), Se(IV), and Zn by a freshwater zooplankton Daphnia magna were measured under different food concentrations. The AEs of...
Antagonistic effect of selenium on mercury assimilation by fish populations near Sudbury metal smelters?
selenium on mercury assimilation fish populations near Sudbury metal smelters
2014/6/10
In this study, the concentrations of Se and Hg were determined in perch (Perca flavescens) and walleye (Stizosedion vitreum) muscle from nine lakes that varied in distance (4-204 km) from the metal sm...
High-resolution metal gradients measured by in situ DGT/DET deployment in Black Sea sediments using an autonomous benthic lander
High-resolution metal gradients measured in situ DGT/DET deployment Black Sea sediments autonomous benthic lander
2014/6/9
DET (Diffusive equilibration in thin films) and DGT (diffusive gradients in thin films) have been deployed in situ using an autonomous benthic lander to measure concentrations and induced fluxes of Fe...