2000
DOI: 10.1029/2000jc000256
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Iron and manganese in the Ross Sea, Antarctica: Seasonal iron limitation in Antarctic shelf waters

Abstract: Abstract. Dissolved iron and manganese and total dissolvable iron were measured in water column samples collected from the polynya region of the southern Ross Sea during cruises in November-December 1994 (spring 1994) and December 1995 to January 1996 (summer 1995). Iron and manganese addition bottle incubation experiments were also performed during these cruises in order to assess the nutritional sufficiency of ambient iron and manganese concentrations for growth of the phytoplankton community. Generally high… Show more

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Cited by 268 publications
(296 citation statements)
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“…Higher Fe stress in March could be caused by Fe utilization by the phytoplankton earlier in the season. Seasonal iron limitation towards the end of the vegetative season was also demonstrated in the Ross Sea and it exerts control on phytoplankton growth (Sedwick et al 2000). In the near-margin region (38-45°W) the C:Si ratios are higher, while the Si:N ratios are lower than further to the east in the central Weddell Sea (Fig.…”
mentioning
confidence: 81%
“…Higher Fe stress in March could be caused by Fe utilization by the phytoplankton earlier in the season. Seasonal iron limitation towards the end of the vegetative season was also demonstrated in the Ross Sea and it exerts control on phytoplankton growth (Sedwick et al 2000). In the near-margin region (38-45°W) the C:Si ratios are higher, while the Si:N ratios are lower than further to the east in the central Weddell Sea (Fig.…”
mentioning
confidence: 81%
“…There have been a number of trace metal-phytoplankton studies in the Ross Sea (Martin et al, 1990;Capodaglio et al, 1998;Fitzwater et al, 2000;Sedwick et al, 2000;Coale et al, 2005;Corami et al, 2005;Grotti et al, 2005;Bertrand et al, 2007). The Ross Sea Polynya exhibits nutrient-like depletion of dissolved iron to low concentrations (∼0.1 nM) that has been shown to limit algal growth rates (Martin et al, 1990;Sedwick et al, 2000;Cochlan et al, 2002;Coale et al, 2003;Bertrand et al, 2007).…”
Section: Introductionmentioning
confidence: 99%
“…The Ross Sea Polynya exhibits nutrient-like depletion of dissolved iron to low concentrations (∼0.1 nM) that has been shown to limit algal growth rates (Martin et al, 1990;Sedwick et al, 2000;Cochlan et al, 2002;Coale et al, 2003;Bertrand et al, 2007). Enhanced iron concentrations have been observed in proximity to melting sea ice and the sea floor, implicating these as important regional sources of dissolved iron (Sedwick and DiTullio, 1997;Fitzwater et al, 2000;Sedwick et al, 2000Sedwick et al, , 2011Coale et al, 2005;. Zinc in the Ross Sea shows a seasonal drawdown, with a significant labile particulate fraction that allows recycling of Zn in the upper water column (Fitzwater et al, 2000;Coale et al, 2005).…”
Section: Introductionmentioning
confidence: 99%
“…Attempts to explain the causes of variability in phytoplankton biomass have focused on the availability of iron and light, the two strongest bottomup controls on phytoplankton growth in the Southern Ocean. Well-studied seasonal blooms in the Ross Sea and the Antarctic Polar Frontal Zone are controlled by both light and iron availability (Sedwick et al 2000;Smith et al 2000). Light limitation prevails throughout the winter and late spring in regions with deep mixed layers (Mitchell et al 1991).…”
mentioning
confidence: 99%
“…Only at the onset of stratification due to increased heating of surface layers, reduced winds, or melting of seaice do blooms begin to form, generally persisting for several weeks (Smith et al 2000). Iron inputs to surface waters in regions that develop seasonal blooms occur primarily during the winter and early spring from deep mixing and melting of sea-ice, and iron levels are relatively high at the beginning of the bloom (Sedwick et al 2000). This iron is depleted as the growing season progresses to the point that phytoplankton biomass and growth rates become iron limited, leading to bloom decline.…”
mentioning
confidence: 99%