|A re-evaluation of marine nematode productivity|
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
In: Heip, C.H.R.; Coomans, A. (Ed.) (1986). Ecology, ecotoxicology and systematics of marine benthos. Laboratorium voor Morfologie en Systematiek der Dieren Sektie Mariene Biologie Rijksuniversiteit Gent: Gent. 217 pp.
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
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, meer
Aquatic communities > Benthos > Meiobenthos
Models > Mathematical models
nematodes, meiobenthos, production, P/B, generation time
|Auteurs|| || Top |
- Vranken, G.
- Herman, P.M.J., meer
- Vincx, M.
- Heip, C.H.R., meer
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.