Sentences with phrase «high ocean productivity»

Not exact matches

Earlier this year, researchers discovered that periods when the ocean had high levels of trace elements — like zinc, copper, manganese and selenium — seemed to overlap with periods of high productivity, including the Cambrian explosion, when most groups of living animals first appeared.

Occasionally, upwelling events increase the productivity in these ocean deserts: Oceanic eddies transport deep - water containing high concentrations of nitrate, phosphate and silicate, towards the surface.

This mega-shift in ocean productivity from south to north over the next three to four decades will leave those most reliant on fish for both food and income high and dry.

This would then lead to large, unpredictable changes in ocean ecosystem structure and productivity, on top of other large unpredictable changes to be expected from ocean acidification, the other great oceanic consequence of high atmospheric carbon dioxide concentrations from fossil fuel burning.

Since we do know that CO2 concentrations have been steadily increasing for the last hundred years, it is almost certain that the true marine productivity / ocean plankton baseline was actually much higher a half century ago.