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A re-evaluation of marine nematode productivity Vranken, G.; Herman, P.M.J.; Vincx, M.; Heip, C.H.R. (1988). A re-evaluation of marine nematode productivity, in: Heip, C.H.R. et al. (Ed.) Collected papers on meiofauna dynamics and energy flow. pp. 1-4 In: Heip, C.H.R. et al. (Ed.) (1988). Collected papers on meiofauna dynamics and energy flow. Delta Institute for Hydrobiological Research: Yerseke. Is gerelateerd aan: Vranken, G.; Herman, P.M.J.; Vincx, M.; Heip, C.H.R. (1986). A re-evaluation of marine nematode productivity. Hydrobiologia 135: 193-196, meer Is gerelateerd aan: 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.) Ecology, ecotoxicology and systematics of marine benthos. pp. 1-6, meer

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Beschikbaar in	Auteurs
VLIZ: Open access 272601 [ download pdf ]

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Trefwoorden

Aquatic communities > Benthos > Meiobenthos Biological production Models > Mathematical models Nematoda [WoRMS] Marien/Kust

Author keywords

nematodes, meiobenthos, production, P/B, generation time

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Auteurs		Top
Vranken, G. Herman, P.M.J. Vincx, M. Heip, C.H.R.

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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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