Scott remains famous for coming second to Amundsen in the race for the South Pole and the fatalit... more Scott remains famous for coming second to Amundsen in the race for the South Pole and the fatalities on the journey back to base, but scientific effort on his expedition was never sacrificed and set many invaluable physical and biological baselines. Amongst these were collections of benthos, such as the bryozoan Cellarinella nutti, which records environmental information in tree-ring-like growth check lines. We measured the growth of C. nutti in the Ross Sea from museum and new collections and fi nd no trend from 1890–1970 but a rapid increase from the 1990s to present. This refl ects coincident increases in regional phytoplankton production. Thus, it is the fi rst evidence that greater surface productivity is being sequestered to the seabed and thus of increasing polar carbon sinks.
This is the first attempt to compile a comprehensive and updated species list for Hydrozoa in the... more This is the first attempt to compile a comprehensive and updated species list for Hydrozoa in the Arctic, encompassing both hydroid and medusa stages and including Siphonophorae. We address the hypothesis that the presence of a pelagic stage (holo- or meroplanktonic) was not necessary to successfully recolonize the Arctic by Hydrozoa after the Last Glacial Maximum. Presence-absence data of Hydrozoa in the Arctic were prepared on the basis of historical and present-day literature. The Arctic was divided into ecoregions. Species were grouped into distributional categories according to their worldwide occurrences. Each species was classified according to life history strategy. The similarity of species composition among regions was calculated with the Bray-Curtis index. Average and variation in taxonomic distinctness were used to measure diversity at the taxonomic level. A total of 268 species were recorded. Arctic-boreal species were the most common and dominated each studied region. ...
Scott remains famous for coming second to Amundsen in the race for the South Pole and the fatalit... more Scott remains famous for coming second to Amundsen in the race for the South Pole and the fatalities on the journey back to base, but scientific effort on his expedition was never sacrificed and set many invaluable physical and biological baselines. Amongst these were collections of benthos, such as the bryozoan Cellarinella nutti, which records environmental information in tree-ring-like growth check lines. We measured the growth of C. nutti in the Ross Sea from museum and new collections and fi nd no trend from 1890–1970 but a rapid increase from the 1990s to present. This refl ects coincident increases in regional phytoplankton production. Thus, it is the fi rst evidence that greater surface productivity is being sequestered to the seabed and thus of increasing polar carbon sinks.
This is the first attempt to compile a comprehensive and updated species list for Hydrozoa in the... more This is the first attempt to compile a comprehensive and updated species list for Hydrozoa in the Arctic, encompassing both hydroid and medusa stages and including Siphonophorae. We address the hypothesis that the presence of a pelagic stage (holo- or meroplanktonic) was not necessary to successfully recolonize the Arctic by Hydrozoa after the Last Glacial Maximum. Presence-absence data of Hydrozoa in the Arctic were prepared on the basis of historical and present-day literature. The Arctic was divided into ecoregions. Species were grouped into distributional categories according to their worldwide occurrences. Each species was classified according to life history strategy. The similarity of species composition among regions was calculated with the Bray-Curtis index. Average and variation in taxonomic distinctness were used to measure diversity at the taxonomic level. A total of 268 species were recorded. Arctic-boreal species were the most common and dominated each studied region. ...
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journey back to base, but scientific effort on his expedition was never sacrificed and set many invaluable physical and biological baselines. Amongst these were collections of benthos, such as the bryozoan Cellarinella nutti, which records environmental information in tree-ring-like growth check lines. We measured the growth of C. nutti in the Ross Sea from museum and new collections and fi nd no trend from 1890–1970 but a rapid increase from the 1990s to present. This refl ects coincident increases in regional phytoplankton production. Thus, it is the fi rst evidence that greater surface productivity is being sequestered to the seabed and thus of increasing polar carbon sinks.
journey back to base, but scientific effort on his expedition was never sacrificed and set many invaluable physical and biological baselines. Amongst these were collections of benthos, such as the bryozoan Cellarinella nutti, which records environmental information in tree-ring-like growth check lines. We measured the growth of C. nutti in the Ross Sea from museum and new collections and fi nd no trend from 1890–1970 but a rapid increase from the 1990s to present. This refl ects coincident increases in regional phytoplankton production. Thus, it is the fi rst evidence that greater surface productivity is being sequestered to the seabed and thus of increasing polar carbon sinks.