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Brominated metabolites and reduced numbers of meiofauna organisms in the burrow wall linging of the deep-sea enteropneust Stereobalanus canadensis
Jensen, P.; Emrich, R.; Weber, K. (1992). Brominated metabolites and reduced numbers of meiofauna organisms in the burrow wall linging of the deep-sea enteropneust Stereobalanus canadensis. Deep Sea Res. (1977) 39(7-8): 1247-1253
In: Deep-Sea Research (1953). Pergamon: Oxford; New York. ISSN 0146-6291; e-ISSN 1878-2485
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| Auteurs | | Top |
- Jensen, P.
- Emrich, R.
- Weber, K.
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| Abstract |
The burrowing enteropneust Stereobalanus canadensis from the deep-sea benthos in the Norwegian Sea was investigated for halogenated metabolites in its body tissues and in its burrow wall lining; the latter was also searched for meiofauna organisms and bacteria. Homogenates of the enteropneust revealed the presence of three brominated metabolites, one of which was identified as 2,4,6-tribromophenol, varying in concentrations from 0.5 to 7 μg g−1 WW. The two other metabolites were tentatively identified as a mono- and dibromo-derivative of a n-hexylhydroquinonemonomethylether and found in concentrations varying from 10 to 50 μg g−1 WW. The bromohydroquinones were also found in burrow wall sediment at a concentration 103−104 times lower than in animal tissues, but not in adjacent sediment layers. No benthic metazoans were found in the burrow wall lining made by S. canadensis; only a slightly higher abundance of bacteria and a small foraminifer Lagena sp. was evident. These biotic results are in contrast to those obtained from the burrow wall lining made by a co-occurring echiuran. The depletion of a benthic metazoan fauna in the burrow wall lining from S. canadensis is possibly caused by the presence of toxic brominated metabolites excreted by the enteropneust. |
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