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A re-evaluation of marine nematode productivity
Vranken, G.; Herman, P.M.J.; Vincx, M.; Heip, C.H.R. (1987). A re-evaluation of marine nematode productivity, in: (1987). IZWO Coll. Rep. 17(1987). IZWO Collected Reprints, 17: pp. chapter 11
In: (1987). IZWO Coll. Rep. 17(1987). IZWO Collected Reprints, 17[s.n.][s.l.], more
In: IZWO Collected Reprints. Instituut voor Zeewetenschappelijk Onderzoek: Bredene & Oostende. ISSN 0772-1250, more

Also published as
  • Vranken, G.; Herman, P.M.J.; Vincx, M.; Heip, C.H.R. (1986). A re-evaluation of marine nematode productivity. Hydrobiologia 135: 193-196, more
  • Vranken, G.; Herman, P.M.J.; Vincx, M.; Heip, C.H.R. (1986). A re-evaluation of marine nematode productivity, in: Heip, C.H.R. et al. (Ed.) (1988). Collected papers on meiofauna dynamics and energy flow. : pp. 193-196, more
  • Vranken, G.; Herman, P.M.J.; Vincx, M.; Heip, C.H.R. (1986). A re-evaluation of marine nematode productivity, in: Heip, C.H.R. et al. (Ed.) (1986). Ecology, ecotoxicology and systematics of marine benthos. pp. 1-6, more

Keywords
    Biological production; Mathematical models; Meiobenthos; Nematoda [WoRMS]; Marine

Authors  Top 
  • Vranken, G.
  • Herman, P.M.J., more
  • Vincx, M., more
  • Heip, C.H.R., more

Abstract
    Nematodes are the most abundant multicellular animals in marine sediments but their role in the benthos has not been properly quantified yet. In nearly all energy-flow budgets of marine systems their annual production P is given as about nine times their biomass B and their part in the total energy-flow is consequently estimated as anywhere between 3 and 30% of the total (carbon) input in the benthic system. Our laboratory experiments demonstrate that nematode productivity is much higher than P/B ~ 9 per year and may reach values of over 60 for bacterial grazers. To obtain more reliable estimates for field populations we propose a regression equation relating egg-to-egg development time Tmin to temperature (t) and adult female weight (W in µg wet weight):log Tmin = 2.202-0.0461 t + 0.627 log W. When multiplied by the constant biomass turnover per generation (P/B)gen = 3, development rate 1/Tmin is a good predictor of daily P/B. This method was applied to two series of field data. A rather stable community from a sublittoral mud in the North Sea had an annual P/B = 20. A less stable Aufwuchs community from Sargassum in Japan had an annual P/B = 58.

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