搜索结果: 1-15 共查到“海洋科学 copper”相关记录19条 . 查询时间(0.093 秒)
Sea fan corals face new threat in warming ocean:copper（图）
Sea fan corals new threat warming ocean:copper
2019/12/6
For colorful, graceful sea fans swaying on coral reefs in the waters around Puerto Rico, copper is an emerging threat in an era of warming oceans.In an NSF-funded study published in the journal Ecolog...
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-dependent iron transport in coastal and oceanic diatoms
Copper-dependent iron transport in coastal oceanic diatoms
2014/5/4
We investigated the presence of plasmalemma-bound copper-containing oxidases associated with the inducible iron (Fe) transport system in two diatoms of the genus Thalassiosira. Under Fe-limiting condi...
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...
Domoic acid: The synergy of iron, copper, and the toxicity of diatoms
The synergy of iron copper
2014/5/13
Diatom blooms generated by the alleviation of iron limitation in high nitrate–low chlorophyll (HNLC) regions
of the oceans often are composed of pennate diatoms of the genus Pseudo-nitzschia, many of...
We determined the chemical speciation of lead and copper in remote mountain and high-latitude lakes at different times of the year, providing background data for regions in Europe least affected by an...
Effects of copper, cadmium, and zinc on the production and exudation of thiols by Emiliania huxleyi
copper cadmium zinc production exudation thiols Emiliania huxleyi
2014/5/9
Cultures of the ubiquitous coccolithophore Emiliania huxleyi grown at field-relevant fixed free ion concentrations of Cu, Cd, and Zn exude a broad array of thiols, some of which increase with increasi...
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...
Novel copper-binding and nitrogen-rich thiols produced and exuded by Emiliania huxleyi
Novel copper-binding nitrogen-rich thiols produced
2014/5/19
In surface seawater, dissolved copper (Cu) is predominantly bound by a small pool of strong ligands, with further
complexation by a larger pool of weaker ligands. Although the chemical structure of b...
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...
Modeling the mass balance and fate of copper in San Diego Bay
mass balance fate copper San Diego Bay
2014/5/14
Because of its presence in antifouling coatings, stormwater, and industrial and municipal discharges, copper is a ubiquitous contaminant in estuarine and coastal environments. We integrated a system-w...
Submarine groundwater discharge of nutrients and copper to an urban subestuary of Chesapeake Bay (Elizabeth River)
Submarine groundwater discharge nutrients and copper urban sub estuary Chesapeake Bay
2014/5/14
We investigated the role submarine groundwater discharge (SGD) plays in the delivery of nutrients and copper to the Elizabeth River (Virginia) estuary, a major subestuary of lower Chesapeake Bay. Usin...