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Trace metal
About: Trace metal is a research topic. Over the lifetime, 5125 publications have been published within this topic receiving 181046 citations.
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TL;DR: Oysters, as very popular food items in France, are subject to rules concerning the maximum acceptable contents of trace metals in foods, and a better estimate of the real concentrations of metals bioavailable to the consumer is gained.
65 citations
TL;DR: Principal component analysis suggests that the Cu, Pb, Zn, and Cd are derived from anthropogenic inputs and that Cr, As, Cu, and Zn are influenced by natural weathering processes.
65 citations
TL;DR: Iron dominated the literature and regularly influenced bloom formation, with 15 of 18 studies indicating limitation or colimitation of cyanobacterial growth, and a range of other trace metals were found to have a demonstrated capacity to limit cyanob bacterial growth.
Abstract: Cyanobacterial blooms are becoming more common in freshwater systems, causing ecological degradation and human health risks through exposure to cyanotoxins. The role of phosphorus and nitrogen in cyanobacterial bloom formation is well documented and these are regularly the focus of management plans. There is also strong evidence that trace metals are required for a wide range of cellular processes, however their importance as a limiting factor of cyanobacterial growth in ecological systems is unclear. Furthermore, some studies have suggested a direct link between cyanotoxin production and some trace metals. This review synthesises current knowledge on the following: (1) the biochemical role of trace metals (particularly iron, cobalt, copper, manganese, molybdenum and zinc), (2) the growth limitation of cyanobacteria by trace metals, (3) the trace metal regulation of the phytoplankton community structure and (4) the role of trace metals in cyanotoxin production. Iron dominated the literature and regularly influenced bloom formation, with 15 of 18 studies indicating limitation or colimitation of cyanobacterial growth. A range of other trace metals were found to have a demonstrated capacity to limit cyanobacterial growth, and these metals require further study. The effect of trace metals on cyanotoxin production is equivocal and highly variable. Better understanding the role of trace metals in cyanobacterial growth and bloom formation is an essential component of freshwater management and a direction for future research.
65 citations
TL;DR: Results indicated that Mn concentrations in algal tissue are the main distinguishing character between taxonomic groups as well as in seasonal and habitat-conditioned variations.
Abstract: Twenty-three common seaweeds from the eulittoral and upper sublittoral in the northern Adriatic (Piran and Rovinj, Istrian coast) were analysed for levels of trace metals (Mn, Zn, Cu, Cd, Pb, Co, Ni). Differences in the levels of metals between species and genera were considered as well as differences between seaweeds from the two areas. Seasonal variations were also observed in some species. Results indicated that Mn concentrations in algal tissue are the main distinguishing character between taxonomic groups as well as in seasonaland habitat-conditioned variations.
65 citations
01 Jan 1984
TL;DR: Sediments are important carriers for trace metals in the hydrological cycle, an aspect which will be discussed in chapters dealing with individual parts of the hydro-logical cycle as discussed by the authors.
Abstract: Sediments are important carriers for trace metals in the hydrological cycle, an aspect which will be discussed in chapters dealing with individual parts of the hydro-logical cycle. However, sediment research has certain aspects of its own, which warrants a separate discussion. Therefore, we will discuss those aspects of metals and sediments which are common to all parts of the hydrological cycle.
64 citations