Bomb signals in Antartica brachiopods

Article Abstract:

Analysis of carbon 14 in Antarctic brachipods show both an unusual periodicity in shell growth and indicate that Antarctice carbon 14 comes from the atmosphere and ice deposition, rather than deep ocean water. The shells of Antarctica brachiopods appear to grow with sub-biennial periodicity. Low carbon 14 signals are probably due to lowered atmospheric supply and radiocarbon deposition in ice over a long period. Shell activity data indicate the presence of a large carbon pool and long residence time in Antarctic circumpolar water.

Antarctica, Growth, Shells, Brachiopoda, Brachiopods

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The Exodus enigma

Article Abstract:

Six-high precision radiocarbon dates of cereal grains from Tell es-Sultan (Jericho) average Jericho's destruction at within 8 years of 3,311 years before present (BP). Two averaged data sets from Oxford and Copenhagen for the Minoan Santorini eruption average at 3,356 plus or minus 18 yr BP, 45 radiocarbon years older than 14C destruction date for Jericho. This time difference may account for the desert period of 40 years that separates the Exodus from the destruction of Jericho, as described in Hebrew texts.

History, Exodus, The, Jericho, West Bank

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Effects of sea-ice extent and krill or salp dominance on the Antarctic food web

Article Abstract:

Data gathered in Antarctica on the availability of krill and salps between 1995 and 1996 show that there is a direct correlation between decreased krill availability, reduced sea-ice conditions and the levels of their vertebrate predators. Salps, while not a major diet for Antarctic vertebrate predators, affects the survival of krill larvae and adult krill reproduction. It is suggested that regional warming and reduced presence of krill could impact on the marine food web.

Research, Environmental aspects, Predation (Biology), Sea ice, Krill

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