Nematode assemblages from the Kandalaksha Depression (White Sea, 251-288 m water depth)статья
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Дата последнего поиска статьи во внешних источниках: 5 мая 2014 г.
Аннотация:The shallow-water nematodes of the White Sea
are relatively well studied; however, information on the
nematode fauna inhabiting the deepest part of this sea is
very scarce. The composition of the nematode assemblages
(at species and genus level) was studied in samples collected
during four sampling occasions in the deepest part of
the Kandalaksha Depression (the White Sea) in July 1998,
October 1998, May 1999, and November 1999. Samples
were collected from a depth of 251–288 m with the aid of a
multicorer. In total, 59 nematode morphotypes belonging
to 37 genera and 18 families were distinguished. The
genera Sabatieria and Filipjeva dominated at all stations,
followed by Aponema, Desmoscolex, and Quadricoma. The
composition of the dominant genera can be considered
typical for this depth range in temperate and Arctic waters,
although Filipjeva and Aponema were among the dominant
genera for the first time. The most abundant species were
Sabatieria ornata, Aponema bathyalis, and Filipjeva filipjevi.
In general, diversity of the nematode assemblages
was lower than in the temperate and Arctic continental
shelf and slope with reduced evenness and species richness.
The evenness of nematode assemblages and other diversity
indices decreased with increasing sediment depth. Based
on the valid species and genera recorded, the nematode
fauna of the Kandalaksha Depression showed a higher
resemblance to that found in the shallow waters of Kandalaksha
Bay.