| PRELIMINARY REPORT ON THE PELAGIC POLYCHAETES FROM THE SOUTH SHETLAND ISLANDS,BISCOE ISLANDS AND THEIR VICINITIES |
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| 摘 要： | The structure of the ice core varies with depth, Its surface layer is firn, followed by an ice layer with random fabric pattern (beginning at 28m depth), then transformed to a small circle girdle pattern (beginning at 147 m depth) through a transition layer, finally to a single-maximum pattern (beginning at 191 m depth). The stratigraphic profile of the ice core is similar to those of other cores on the Law Dome, For BHQ located in the middle of a flow line from the summit to the coast, the initial depth of every specific layer is less than that in the upstream and larger than that in the downstream. The ice was analyzed for trace elememts using instrumental neutron activation technique. No tendency towards a systematic increase or decrease in the element concentrations in the past 4000 years has been found. The mean concentrations of Na and Al over the past 4000 years are higher than those in the Vostok ice core by factors of 9 and 4, respectively.
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PRELIMINARY REPORT ON THE PELAGIC POLYCHAETES FROM THE SOUTH SHETLAND ISLANDS, BISCOE ISLANDS AND THEIR VICINITIES |
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| Abstract: | This report provides a result obtained by the First Chinese Antarctic and Southern Ocean Expedition. Specimens were collected by investigators of the Second Institute of Oceanography, SOA, with plankton nets in February and March of 1985 from the South Shetland Islands, the Biscoe Islands and their vicinities, between 61°15'20S-65°30'16S, 56°18'72W-67°59'45W. Eight species belonging to 5 genera in 4 families have been identified, of which 4 species, namely Maupasia coeca Viguier, Rhyn-chonerella petersii (Langerhans), Rhynchonerella bongraini (Gravier), and Tomopteris planktonis Aps-tein are recorded for the first time from the South Shetland Islands and 2 species, namely Rhynchonerella bongraini (Gravier), and Tomopteris carpenteri Quatrefages are endemic species of Antarctica. |
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