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Rüger, Hans-Jürgen; Tan, Tjhing Lok (1992): Abundance and community structures of heterotrophic and oligotrophic bacteria from the Sierra Leone Abbyssal Plain. PANGAEA, https://doi.org/10.1594/PANGAEA.744000, Supplement to: Rüger, H-J; Tan, TL (1992): Community structures of cold and low-nutrient adapted heterotrophic sediment bacteria from the deep eastern tropical Atlantic. Marine Ecology Progress Series, 84, 83-93, https://doi.org/10.3354/meps084083

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Abstract:
Colony counts on high and low-nutrient agar media incubated at 2 and 20 °C, Acridine Orange Direct Counts and biomasses are reported for sediments of the Sierra Leone Abyssal Plain. All isolates from low-nutrient agars also grew in nutrient-rich seawater broth (100 % SWB). However, a greater proportion of the 2 °C than of the 20 °C isolates grew in 2.5% SWB, containing 125 mg/l peptone and 25 mg/l yeast extract. Only 14 strains or 12.7% of the 2 °C isolates, but none of the 20 °C isolates, grew in 0.25 % SWB. Psychrophilic bacteria with maximum growth temperatures below 12 °C, isolated at 2 °C, were predominant among the cultivable bacteria from the surface layer. They required seawater for growth and belonged mainly to the Gram-negative genera Alteromonas and Vibrio. In contrast to the earlier view that psychrophily is connected with the Gram-negative cell type, it was found that cold-adapted bacteria of the Gram-positive genus Bacillus predominated in the 4 to 6 cm layer. The 20 °C isolates, however, were mostly Gram-positive, mesophilic, not dependent on seawater for growth, not able to utilize organic substrates at 4 °C, and belonged mainly to the genus Bacillus and to the Gram-positive cocci. The majority of the mesophilic bacilli most likely evolved from dormant spores, but not from actively metabolizing cells. It can be concluded that only the strains isolated at 2 °C can be regarded as indigenous to the deep-sea.
Coverage:
Median Latitude: 9.540243 * Median Longitude: -20.145252 * South-bound Latitude: 2.996700 * West-bound Longitude: -23.743300 * North-bound Latitude: 17.000000 * East-bound Longitude: -17.000000
Date/Time Start: 1983-06-29T00:00:00 * Date/Time End: 1983-08-28T23:00:00
Event(s):
GIK16421-2 (371) * Latitude: 9.921667 * Longitude: -17.868333 * Date/Time: 1983-08-04T00:00:00 * Elevation: -1507.0 m * Location: Atlantic Ocean * Campaign: M65 (GEOTROPEX 83, NOAMP I) * Basis: Meteor (1964) * Method/Device: Giant box corer (GKG)
GIK16422-2 (373) * Latitude: 9.238333 * Longitude: -19.628333 * Date/Time: 1983-08-06T00:00:00 * Elevation: -4694.0 m * Location: Atlantic Ocean * Campaign: M65 (GEOTROPEX 83, NOAMP I) * Basis: Meteor (1964) * Method/Device: Giant box corer (GKG)
GIK16424-1 (375) * Latitude: 9.030000 * Longitude: -19.335000 * Date/Time: 1983-08-07T00:00:00 * Elevation: -4648.0 m * Location: Atlantic Ocean * Campaign: M65 (GEOTROPEX 83, NOAMP I) * Basis: Meteor (1964) * Method/Device: Giant box corer (GKG)
Size:
3 datasets

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