Limitation

Widespread nutrient co-limitation discovered on GEOTRACES cruise

Browning and co-workers (2017, see reference below) find that multiple nutrients must be supplied to stimulate phytoplankton growth on the southeast Atlantic GEOTRACES GA08 cruise. The paper has been published in Nature. Experiments to date have suggested that across most of the ocean surface marine phytoplankton are limited by either nitrogen or iron. But simultaneously […]

Nov / 10 / 2017

Do you know that coastal phytoplankton is able to adapt to iron limitation?

Oceanographers have long understood that phytoplankton in the open ocean tend to have lower iron (Fe) requirements and/or more strategies for obtaining Fe from the environment. Adding a new twist to the established paradigm, Mackey and co-workers (2015, see reference below) show that coastal Synechococcus from the New England shelf is capable of dynamic, multitiered […]

Oct / 01 / 2015

Seasonal iron supply in the Southern Ocean is dominated by winter mixing

An international team of researchers analysed the available dissolved iron data taken from all previous studies of the Southern Ocean, together with satellite images taken of the area, to quantify the amount of iron supplied to the surface waters of the Southern Ocean. They found that in contrast to the processes that supply so-called macronutrients […]

Nov / 24 / 2014

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