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Iron and copper limitations differently affect growth rates and photosynthetic and physiological parameters of the marine diatom Pseudo-nitzschia delicatissima
Iron and copper limitations differently affect growth rates photosynthetic and physiological parameters marine diatom Pseudo-nitzschia delicatissima
2014/4/2
In ～ 50% of the ocean, iron (Fe) limits phytoplankton growth, including that of the diatom Pseudo-nitzschia. Fe-limited Pseudo-nitzschia spp. may produce the potent neurotoxin domoic acid (DA) to acce...
Potential role of copper availability in nitrous oxide accumulation in a temperate lake
copper nitrous oxide accumulation temperate lake
2014/4/22
Denitrifying bacteria require copper for the synthesis of nitrous oxide reductase. In the absence of sufficient bioavailable Cu, nitrous oxide (N2O) may accumulate in natural waters during denitrifica...
Photochemical control of copper complexation by dissolved organic matter in Rocky Mountain streams, Colorado
Photochemical control of copper complexation dissolved organic matter Rocky Mountain streams Colorado
2014/4/23
We investigated photochemical, seasonal, and source effects on copper (Cu) complexation by dissolved organic matter (DOM). Cu-DOM complexation regulates Cu toxicity by decreasing the activity of the c...
Copper requirements for iron acquisition and growth of coastal and oceanic diatoms
Copper requirements for iron acquisition growth of coastal oceanic diatoms
2014/5/9
Centric diatoms isolated from open ocean environments require higher concentrations of Cu for growth than their coastal counterparts. In artificial seawater medium containing <1 nmol L-1 Cu, three coa...
Response of nonprotein thiols to copper stress and extracellular release of glutathione in the diatom Thalassiosira weissflogii
non protein thiols copper stress extracellular release glutathione diatom Thalassiosira weissflogii
2014/5/9
We studied the dynamic changes of cellular thiols and the extracellular release of glutathione (GSH) during growth of the marine diatom Thalassiosira weissflogii under varying levels of copper (Cu) ad...
We present a budget for lead, zinc, and copper in Lough Neagh, Northern Ireland, and use the results from this and seven other lakes in Europe and the United States to develop two simple, generic mode...
Interactive regulation of dissolved copper toxicity by an estuarine microbial community
Interactive regulation copper toxicity estuarine microbial community
2014/5/19
Cultured marine microorganisms under copper stress produce extracellular compounds having a high affinity for copper (copper-complexing ligands). These ligands are similar in binding strength to those...
Seasonal cycle of copper speciation in Gullmar Fjord, Sweden
Seasonal cycle copper speciation Gullmar Fjord Sweden
2014/5/20
The chemical speciation of dissolved Cu was investigated by voltammetric methods in Gullmar Fjord, Sweden, over the course of a year from September 1996 until August 1997. Sampling was carried out on ...
Copper toxicity and cyanobacteria ecology in the Sargasso Sea
Copper toxicity cyanobacteria ecology Sargasso Sea
2014/5/27
The closely related cyanobacteria Synechococcus and Prochlorococcus have different distributions in stratified water columns in the northern Sargasso Sea. The abundance of Synechococcus is relatively ...