The influence of zinc, aluminum and cadmium on the uptake kinetics of iron by algae

Santana-Casiano, J. Magdalena; González‐Dávila, Melchor; Laglera, Luis M.; Pérez‐Peña, J.; Brand, Larry E.; Millero, Frank J.

doi:10.1016/s0304-4203(97)00068-6

Cited by 20 publications

(21 citation statements)

References 37 publications

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“…refs [47,[121][122][123][124]) is the expected direct chemical response. In contrast, iron uptake by T. weissflogii actually increased in the presence of zinc and aluminium, [125] presumably due to the stimulation of iron-binding siderophores. In another study, copper uptake was enhanced when nickel was added to solutions resulting in a concurrent reduction of the respiratory rate and chlorophyll a contents of Scenedesmus quadricauda.…”

Section: Biological Control Of Trace Metal Uptakementioning

confidence: 84%

Predicting the Bioavailability of Metals and Metal Complexes: Critical Review of the Biotic Ligand Model

Slaveykova¹,

Wilkinson²

2005

Environ. Chem.

295

273

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Abstract. The biotic ligand model is a useful construct both for predicting the effects of metals to aquatic biota and for increasing our mechanistic understanding of their interactions with biological surfaces. Since biological effects due to metals are always initiated by metal bioaccumulation, the fundamental processes underlying bio-uptake are examined in this review. The model assumes that the metal of interest, its complexes, and metal bound to sensitive sites on the biological surface are in chemical equilibrium. Therefore, many of the equilibrium constants required for the model have been compiled and their methods of determination evaluated. The underlying equilibrium assumption of the BLM is also examined critically. In an attempt to identify which conditions are appropriate for its application, several documented examples of failures of the BLM are discussed. Finally, the review is concluded by identifying some important future research directions.

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Section: Biological Control Of Trace Metal Uptakementioning

confidence: 84%

Predicting the Bioavailability of Metals and Metal Complexes: Critical Review of the Biotic Ligand Model

Slaveykova¹,

Wilkinson²

2005

Environ. Chem.

295

273

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“…However, the initial Fe assimilation rate can be obtained by regression of the non-linear data. Intracellular Fe concentration does not change linearly during incubation (Anderson & Morel 1982, Hudson & Morel 1990, Santana-Casiano et al 1997, Maldonado & Price 1999, Hutchins et al 1999b, Kuma et al 1999, Chen et al 2003, Wells & Trick 2004). According to Tailor's expansion, the exponential function in Eq.…”

Section: Methodsmentioning

confidence: 96%

“…(1) ). For both the siderophore-based transport system used by cyanobacteria (Wilhelm & Trick 1994) and the membrane transport system used by diatoms (Anderson & Morel 1982, Hudson & Morel 1990, Sunda & Huntsman 1995, Fe uptake kinetics consist of 2 steps: (1) initial reversible binding of Fe species to transport sites or carriers, and (2) irreversible transport into the cell (Hudson & Morel 1993, Santana-Casiano et al 1997). According to Hudson & Morel (1993) and SantanaCasiano et al (1997), the change of transport complex concentration can be described as: (2) where …”

Section: Methodsmentioning

confidence: 99%

Accelerated uptake by phytoplankton of iron bound to humic acids

Chen¹,

Wang²

2008

Aquat. Biol.

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“…), such inputs could be contributing toward A. anophagefferens dominance by eliminating competing phytoplankton. Saturating Fe levels could prevent selected algal species from assimilating other essential trace elements (Sunda 1994, Sunda & Huntsman 1995, Magdalena Santana-Cosicno et al 1997. Alternatively, if additions Fe co-preciptated orthophosphate out of solution (Stumm & Morgan 1981) it would have deprived autotrophic phytoplankton of P, but would have allowed A. anophagefferens to proliferate, since it can use organic P (Dzurica et al 1989).…”

Section: Ironmentioning

confidence: 99%

Effects of organic carbon, organic nitrogen, inorganic nutrients, and iron additions on the growth of phytoplankton and bacteria during a brown tide bloom

Gobler

Sañudo‐Wilhelmy²

2001

Mar. Ecol. Prog. Ser.

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Although nutrient inputs are the most commonly cited cause of brown tide blooms of Aureococcus anophagefferens on Long Island, New York, there is no consensus as to which nutrient(s) stimulates A. anophagefferens growth in the field. To evaluate the ability of dissolved organic carbon (DOC as glucose), dissolved organic nitrogen (DON as urea), nitrate, phosphate and iron to enhance A. anophagefferens growth during blooms, 10 nutrient enrichment experiments were conducted over the course of a brown-tide bloom during May, June and July of 1998 in West Neck Bay (WNB), Long Island, USA, using whole bay water. During the experiments, A. anophagefferens densities ranged from 1 × 10 4 to 5 × 10 5 cells ml -1, representing between 2 and 90% of algal biomass. Brown tide growth changed as a function of ambient nutrient levels during experiments, as the bloom shifted from organic carbon to N-limitation when nitrate levels in WNB decreased from elevated (2 to 20 µM) to low (< 0.5 µM) levels. Contrary to current hypotheses that organic nitrogen fuels A. anophagefferens bloom formation and inorganic nitrogen can repress it, brown tide growth in response to equimolar nitrate and urea additions was nearly identical during experiments. Additions of nitrate or urea either had no effect or significantly decreased the relative abundance of the brown tide among the algal community during experiments. In contrast, augmentation of A. anophagefferens growth and decreases in non-brown-tide phytoplankton (NBTP) growth during organic carbon (glucose) additions resulted in significant increases in the relative abundance of brown tide among phytoplankton. Simultaneous enhancement of bacterial growth by glucose additions indicated a possible A. anophagefferens-NBTPbacterial interaction by which monospecific brown tides may be initiated. Therefore, it is hypothesized that processes introducing copious amounts of labile DOC during A. anophagefferens blooms, such as leakage or remineralization of NBTP blooms, could promote monospecific brown tides.

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The influence of zinc, aluminum and cadmium on the uptake kinetics of iron by algae

Cited by 20 publications

References 37 publications

Predicting the Bioavailability of Metals and Metal Complexes: Critical Review of the Biotic Ligand Model

Predicting the Bioavailability of Metals and Metal Complexes: Critical Review of the Biotic Ligand Model

Accelerated uptake by phytoplankton of iron bound to humic acids

Effects of organic carbon, organic nitrogen, inorganic nutrients, and iron additions on the growth of phytoplankton and bacteria during a brown tide bloom

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