The effect of experimentally increased near-bottom flow on metazoan meiofauna at a deep-sea site, with comparison data on macrofauna

作者: David Thistle , Lisa A. Levin

DOI: 10.1016/S0967-0637(97)00101-5

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摘要: It has been argued that strong near-bottom flows affect macrofauna and meiofauna in the deep sea, but evidence comes largely from studies compared sites separated geographically by hundreds to thousands of kilometers depth meters. In this paper, results first experimental investigation effects flow on deep-sea metazoan are presented. At a site (32° 27.581′ N, 127° 47.839′ W) at 583 m Fieberling Guyot summit plain, submersible Alvin emplaced weirs designed increase locally. After 6.5 weeks, sediments unmanipulated locations vicinity were sampled. The abundances nematodes, harpacticoid copepods, ostracods, kinorhynchs, considered collectively as individual taxa, significantly lower weir samples than background samples. Parallel responses observed total macrofaunal mollusk abundances. Proportional declines kinorhynchs mollusks well. These suggest can reduce abundance sea alter assemblage composition.

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