Data/hora: 09/06/2024 02:46:22

Provedor de dados: | Open Marine Archive
País: | Belgium
Título: | A re-evaluation of marine nematode productivity
Autores: | Vranken, G.; Herman, P.M.J.; Vincx, M.; Heip, C.H.R.
Data: | 1986
Ano: | 1986
Palavras-chave: | Biological production; Mathematical models; Meiobenthos; Nematoda [Nematodes].
Resumo: | 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 T&lt;sub&gt;min&lt;/sub&gt; to temperature (t) and adult female weight (W in µg wet weight):log T&lt;sub&gt;min&lt;/sub&gt; = 2.202-0.0461 t + 0.627 log W. When multiplied by the constant biomass turnover per generation (P/B)&lt;sub&gt;gen&lt;/sub&gt; = 3, development rate 1/T&lt;sub&gt;min&lt;/sub&gt; 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 &lt;i&gt;Sargassum&lt;/i&gt; in Japan had an annual P/B = 58.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3576
Fonte: | %3Ci%3EHydrobiologia+135%3C%2Fi%3E%3A+193-196
Fonte: | info:eu-repo/semantics/restrictedAccess