Metal accumulation and impacts in phytoplankton

Sanders, James G.; Riedel, Gerhardt F.

doi:10.1007/978-1-4757-2761-6_4

Cited by 23 publications

(22 citation statements)

References 80 publications

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“…Exposure to soluble metals results primarily in their accumulation in the tissues like mantle and gills of the mollusks (Amiard, 1978), while metal intake via food results in metal compartmentalization in storage tissue of glandular type, like the digestive gland (Tenore et al, 1968;Viarengo and Nott, 1993). In digestive gland, phytoplankton ingestion is, thus, an important source of metals, because primary producers show some of the highest levels of metal accumulation in food chains (Sanders and Riedel, 1998).…”

Section: Temporal Variations Of Digestive Gland Mass Cytosolic Mt Anmentioning

confidence: 99%

Is the digestive gland of Mytilus galloprovincialis a tissue of choice for estimating cadmium exposure by means of metallothioneins?

Raspor

Dragun

Erk

et al. 2004

Science of The Total Environment

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A study performed over 12 months with caged mussels M. galloprovincialis in the coastal marine zone which is under the urban pressure, reveales a temporal variation of digestive gland mass which causes "biological dilution" of cytosolic metallothionein (MT) and trace metal (Cd, Cu, Zn, Fe, Mn) concentrations. The dilution effect was corrected by expressing the cytosolic MT and metal concentrations as the tissue content.

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Section: Temporal Variations Of Digestive Gland Mass Cytosolic Mt Anmentioning

confidence: 99%

Is the digestive gland of Mytilus galloprovincialis a tissue of choice for estimating cadmium exposure by means of metallothioneins?

Raspor

Dragun

Erk

et al. 2004

Science of The Total Environment

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“…Based on our results for C. reinhardtii, kinetic uptake of Cd and Zn by P-starved cells in P-enriched media was strongly correlated with the transient change of cellular P. Rapid P uptake and subsequent formation of polyphosphate in the cells greatly stimulated Cd and Zn accumulation in the green alga. For Se, P-starved cells in the P-depleted medium accumulated the highest Se concentration possibly due to the lowest antagonistic competition with P (Sanders & Riedel 1998).N enrichment significantly increased the algal uptake and intracellular partitioning of Cd and Zn, although such influences were less pronounced than those of P additions. A considerable increase in metal accumulation occurred only at the highest N level (200 µM) in the short-term acclimation experiments.…”

mentioning

confidence: 92%

“…As efficient scavengers, phytoplankton play a critical role in trace metal cycling in the pelagic (Sanders & Riedel 1998). A possible stoichiometric relationship between Cd, Ni, and Zn and nutrient elements in the water column has been proposed for oceans and freshwater lakes (Sigg 1985, Murray 1987.…”

Section: Introductionmentioning

confidence: 99%

“…By examining selenite uptake in Chlamydomonas reinhardtii, Riedel & Sanders (1996) showed that Se accumulation significantly increased in cells with reduced medium P concentrations. Sanders & Riedel (1998) further suggested that the accumulation of elements with anionic forms (e.g. SeO 3 , CrO 4 , and AsO 3 ) is usually related to competition for uptake with a similar nutrient ion (eg.…”

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confidence: 99%

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Biological uptake of Cd, Se(IV) and Zn by Chlamydomonas reinhardtii in response to different phosphate and nitrate additions

Wang

2004

Aquat. Microb. Ecol.

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We investigated the influences of different nutrient regimes on the accumulation of Cd, Zn, and Se(IV) in the freshwater green alga Chlamydomonas reinhardtii over a 4 h exposure period. After the cells had been acclimated to different ambient P levels from 0.1 to 10.0 µM for 2 d in different media (buffer, basic and simplified uptake media), their intracellular metal concentrations increased by 3.6 to 14× for Cd and 1.6 to 4.0× for Zn. Se uptake was, however, decreased by 7.7 to 44×. Semi-continuous culture experiments further demonstrated that the alga's metal concentrations were enhanced 26× for Cd and 8.0× for Zn, whereas Se accumulation was inhibited 75× at the same medium P levels. The uptake rates in semi-continuous cultures increased by 269× for Cd and 11× for Zn, but Se uptake decreased 92× with increasing P concentration. Medium P additions also significantly increased intracellular partitioning for Cd and Zn, but there was no apparent effect for Se. For P-starved or P-repleted cells, the P-enriched medium dramatically increased the cellular accumulation of Cd and Zn compared with the P-depleted medium. A surge uptake of Cd and Zn occurred in P-starved cells. P starvation also resulted in a remarkable increase in Se accumulation in the Pdeplete medium. N enrichment from 5 to 200 µM significantly increased the alga's uptake and intracellular partitioning for Cd and Zn, although the effects were not strictly concentration-dependent. Our study strongly suggests that ambient P enrichment greatly stimulates Cd and Zn accumulation and sequestration in C. reinhardtii, presumably due to rapid P uptake and subsequent formation of polyphosphate in the cells, and distinctly inhibits Se uptake possibly due to the competition of similar anionic forms for transport between Se and P. KEY WORDS: Uptake · Metals · Green alga · Nutrient enrichment Resale or republication not permitted without written consent of the publisherAquat Microb Ecol 35: [163][164][165][166][167][168][169][170][171][172][173] 2004 concentrations in phytoplankton, especially in freshwater species, although this may be important in understanding the stoichiometric mechanisms in lake systems.Under N-limited conditions, a significant reduction in photosynthetic activity occurs in green algae, including a sharp decline in their chlorophyll content and a rise in carotenoid concentration (Sayed 1998, Hanagata & Dubinsky 1999. When the phytoplankton are under P-limited conditions, the uptake system for phosphate in cells is highly activated. Abrupt exogenous P enrichment results in a rapid P incorporation and storage in intracellular polyphosphates (Kulaev & Vagabov 1983, Wagner & Falkner 2001. Polyphosphate bodies are considered an important pool for the sequestration of heavy metals by freshwater phytoplankton (e.g. Cd, Hg, Pb, and Zn) (Jensen et al. 1982a). Although metal limitation (e.g. of Fe) in phytoplankton may affect the assimilation of nitrate and phosphate (McKay et al. 2001), the effects of nutrient enrichment or starvation on m...

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“…Enrichment of estuarine systems with nutrients and trace elements is a common occurrence in the United States and throughout the world (Gray and Paasche 1984;Howarth 1988;Malone et al 1993;Cloern 1996;Sanders and Riedel 1998). Nutrient enrichment can increase algal growth (including harmful algal blooms), decrease light penetration, cause accumulation of organic carbon in the benthos, and consequent hypoxia or anoxia in bottom waters (Schelske and Stoermer 1971;Turpin and Harrison 1979;Oviatt et al 1989;Riegman 1995).…”

Section: Introductionmentioning

confidence: 99%

The interrelationships among trace element cycling, nutrient loading, and system complexity in estuaries: A mesocosm study

Riedel¹,

Sanders

2003

Estuaries

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Biogeochemical interactions between a suite of trace elements and nutrients were examined in a series of experimental mesocosm experiments to understand how multiple stressors affect estuarine environments and how these effects are modified by the complexity of the system used to examine them. Experimental treatment included additions of nutrients and trace elements separately and combined, along with a gradient in experimental system complexity. Eight mesocosm experiments were carried out from 1996 through 1998. Increased nutrients generally decreased dissolved trace element concentrations, in large part through an increase in phytoplankton biomass, but also by increasing the concentration of metals in the particles. Trace element additions increased dissolved nutrients by decreasing phytoplankton biomass. The presence of sediments reduced both dissolved trace element and nutrient concentrations. Other complexity treatments had weaker effects on both dissolved nutrients and trace elements. Many of the observed effects appeared to be seasonal, occurring only in spring, or their magnitude was greater in spring. This may be linked to a change from phosphorus to nitrogen limitation that often occurs in the Patuxent River estuary in the late spring or early summer period.

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Metal accumulation and impacts in phytoplankton

Cited by 23 publications

References 80 publications

Is the digestive gland of Mytilus galloprovincialis a tissue of choice for estimating cadmium exposure by means of metallothioneins?

Is the digestive gland of Mytilus galloprovincialis a tissue of choice for estimating cadmium exposure by means of metallothioneins?

Biological uptake of Cd, Se(IV) and Zn by Chlamydomonas reinhardtii in response to different phosphate and nitrate additions

The interrelationships among trace element cycling, nutrient loading, and system complexity in estuaries: A mesocosm study

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