Vertex: phytoplankton/iron studies in the Gulf of Alaska

Martin, John H.; Gordon, R. Michael; Fitzwater, Steve E.; Broenkow, William W.

doi:10.1016/0198-0149(89)90144-1

Cited by 777 publications

(518 citation statements)

References 37 publications

Supporting

Mentioning

456

Contrasting

Unclassified

Order By: Relevance

“…In addition to these modifications, two new ecosystem components, iron (Fe) and dissolved organic carbon (DOC), were added to the model. Previous studies [Martin et al, 1989;Boyd et al, 1996;Maldonado et al, 1999] showed that phytoplankton growth in the subarctic Pacific is generally iron limited. We added the iron component to obtain more accurate simulations of nitrate, phytoplankton, and community production.…”

Section: Model Descriptionmentioning

confidence: 99%

Seasonal and interannual variability of phytoplankton, nutrients, TCO₂, pCO₂, and O₂ in the eastern subarctic Pacific (ocean weather station Papa)

Signorini¹,

McClain²,

Christian³

et al. 2001

J. Geophys. Res.

View full text Add to dashboard Cite

Abstract. A coupled, one-dimensional ecosystem/carbon flux model is used to simulate the seasonal and interannual variability of phytoplankton, nutrients, TCO2, 02, and pCO 2 at ocean weather station Papa (OWS P at 50øN, 145øW). The 23-year interannual simulation ) is validated with available data and analyzed to extend seasonal and interannual variations beyond the limited observational records. The seasonal cycles ofpCO 2 and sea-air CO2 flux are controlled by a combination of thermodynamics, winds, and biological uptake. There is ingassing of CO2 during the fall-winter months when SSTs are colder and wind forcing is vigorous, while there is a much smaller ingassing of CO2 during the summer when sea surface temperatures are warmer and wind speeds are reduced. Biological production plays a major role in maintaining the air-sea equilibrium. An abiotic simulation showed that OWS P would be a source of atmospheric CO2 (

show abstract

Section: Model Descriptionmentioning

confidence: 99%

Seasonal and interannual variability of phytoplankton, nutrients, TCO₂, pCO₂, and O₂ in the eastern subarctic Pacific (ocean weather station Papa)

Signorini¹,

McClain²,

Christian³

et al. 2001

J. Geophys. Res.

View full text Add to dashboard Cite

show abstract

“…In nearshore areas, the concentrations of manganese and iron are largely determined by riverine inputs and/or interactions with sediments (resuspension or effluxes at the sediment-water interface). This has been demonstrated for several continental margins: Pacific Ocean, near Alaska (Martin et al, 1989), Monterey Bay (Martin and Gordon, 1988), New Zealand (Croot and Hunter, 1998), western (Wu and Luther, 1996) and eastern (Le Gall et al, 1999) North Atlantic Ocean. Moreover, iron and manganese enrichments have also been reported in water masses over the shelf regions of oceanic islands like the Kerguelen plateau (Bucciarelli et al, 2001) and the Galapagos archipelago (Martin et al, 1994;Gordon et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Sources and transport of dissolved iron and manganese along the continental margin of the Bay of Biscay

Laës-Huon¹,

Blain

Laan

et al. 2007

Biogeosciences

View full text Add to dashboard Cite

Abstract. Dissolved iron (DFe; <0.2 µm) and dissolved manganese (DMn; <0.2 µm) concentrations were determined in the water column of the Bay of Biscay (eastern North Atlantic Ocean) in March 2002. The samples were collected along a transect traversing from the European continental shelf over the continental slope. The highest DFe and DMn concentrations (2.39 nM and 6.10 nM, respectively) were observed in the bottom waters on the shelf at stations closest to the coast. The release of trace metal from resuspended particles and the diffusion from pore waters were probably at the origin of elevated DFe and DMn concentrations in the Bottom Boundary Layer (BBL). In the slope region, the highest total dissolvable iron (TDFe), DFe and DMn values (24.6 nM, 1.58 nM and 2.12 nM, respectively) were observed close to the bottom at depth of ca. 600-700 m. Internal wave activity and slope circulation are thought to be at the origin of this phenomenon. These processes were also very likely the cause of elevated concentrations (DFe: 1.27 nM, DMn: 2.34 nM) measured in surface waters of stations located in the same area. At stations off the continental slope, the vertical distribution of both metals were typical of open ocean conditions, indicating that inputs from the continental margin did not impact the metal distributions in the offshore waters.

show abstract

“…Evidence from Martin and co-workers (Martin & Fitzwater 1988. Martin et al 1989) preceded a flurry of reports suggesting that certain areas of the oceans, including the sub-Arctic Pacific gyre, the equatorial Pacific, and the vast Southern Ocean, may be limited by the amount of available iron.…”

Section: Introductionmentioning

confidence: 99%

Ecology of iron-limited cyanobacteria: a review of physiological responses and implications for aquatic systems

Wilhelm¹

1995

Aquat. Microb. Ecol.

132

104

View full text Add to dashboard Cite

Recent studies have demonstrated that cyanobacteria are capable of responding to low levels of iron availability through alterations in cellular iron requirements and by increasing their ability to scavenge iron from the environment through the activation of siderophore-mediated high-affinity transport systems. The significant amount of evidence In the literature on siderophore production by cyanobacteria suggests that these iron-chelating compounds may b e important in the determination of iron availability in aquatic systems. This review focuses on how cyanobacteria respond to growthlimiting levels of available iron and on how siderophores potentially alter the biological availability of iron in the system thereby allowing the cyanobacteria to e x~s t at low iron availabilities. In the light of recent findings on the amount of organically complexed iron in aquatic systems, it is concluded that the production of siderophores by aquatic organisms may specifically dictate the levels of biologically available iron in some aquatic systems.

show abstract

Vertex: phytoplankton/iron studies in the Gulf of Alaska

Cited by 777 publications

References 37 publications

Seasonal and interannual variability of phytoplankton, nutrients, TCO₂, pCO₂, and O₂ in the eastern subarctic Pacific (ocean weather station Papa)

Seasonal and interannual variability of phytoplankton, nutrients, TCO₂, pCO₂, and O₂ in the eastern subarctic Pacific (ocean weather station Papa)

Sources and transport of dissolved iron and manganese along the continental margin of the Bay of Biscay

Ecology of iron-limited cyanobacteria: a review of physiological responses and implications for aquatic systems

Contact Info

Product

Resources

About

Vertex: phytoplankton/iron studies in the Gulf of Alaska

Cited by 777 publications

References 37 publications

Seasonal and interannual variability of phytoplankton, nutrients, TCO2, pCO2, and O2 in the eastern subarctic Pacific (ocean weather station Papa)

Seasonal and interannual variability of phytoplankton, nutrients, TCO2, pCO2, and O2 in the eastern subarctic Pacific (ocean weather station Papa)

Sources and transport of dissolved iron and manganese along the continental margin of the Bay of Biscay

Ecology of iron-limited cyanobacteria: a review of physiological responses and implications for aquatic systems

Contact Info

Product

Resources

About

Seasonal and interannual variability of phytoplankton, nutrients, TCO₂, pCO₂, and O₂ in the eastern subarctic Pacific (ocean weather station Papa)

Seasonal and interannual variability of phytoplankton, nutrients, TCO₂, pCO₂, and O₂ in the eastern subarctic Pacific (ocean weather station Papa)