The sea ice in Polar Oceans provides a unique environment utilised by a diverse group of organisms ranging in size from single-celled algae within the ice to meter-long algal assemblages, dominated by diatoms, attached to the lower surface of the ice, and from protozoans to marine mammals. ...
NASA’s OceanColor (http://oceancolor.gsfc.nasa.gov/) and NOAA’s National Oceanographic Data Center (http://www.nodc.noaa.gov/) websites. Sea ice cover impedes measurement of ocean color from space, reducing the apparent areas of the polar oceans in the winter hemisphere (upper panels)....
Changes in the productivity of the oceans are reflected in changes of plankton biomass. Plankton contributes approximately half of the global primary production, supports marine food webs, influences the biogeochemical process in the ocean, and strongly affects commercial fisheries30,31,32. Indeed, an...
despite its signicance in the distributionof nutrients to the world oceans, especially the lower latitudes, and controlling global climate.In order to capture the response of the phytoplankton to environmental change across thevast Southern Ocean, a method with high spatio-temporal resolution is desira...
In this paper we use an updated hemispheric data set “n = 1171” of modern samples from the North Atlantic, Arctic and North Pacific oceans (Fig. 1; de Vernal et al., 1997, de Vernal et al., 2001, de Vernal et al., 2005a), in order to explore empirically the relationship of di...
The evolution of cost efficient swimming in marine mammals: limits to energetic optimization Mammals re–entered the oceans less than 60 million years ago. The transition from a terrestrial to an aquatic lifestyle required extreme morphological and... Terrie,M.,Williams - 《Philosophical Transactions...
The time series of total Be, Al, Ti, Fe and 10Be in the sediment core are all well correlated with each other and with dust records in the polar ice cores. The observations suggest that a significant flux of these trace metals to oceans is contributed by the aeolian dust, in this ...
aOut of sight, and mostly out of mind, the oceans are under siege. Scientists from around the world are reporting global disturbances in the seas that threaten to bring Richard Cashin’s grim warning home to every Canadian household. From the polar seas to the tropics, fish populations have...
(SAZ) of the Southern Ocean there is evidence for enhanced ocean productivity during glacials5,6,7, consistent with the Fe fertilization effect. In contrast, for the Antarctic zone (AZ)—the productive but Fe-limited Southern Ocean south of the Antarctic Polar Front (Fig.1)—there is ...
and abundance. Diatoms are the most dominant phytoplankton in coastal oceans, contributing up to 40% of the total marine primary production. Moreover, it is well known that the production originating from larger phytoplankton, such as diatoms, is the portion most efficiently transferred to higher ...