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Snail numbers, biomass and respiratory metabolism in a beech woodland — Wytham Woods, Oxford

Identifieur interne : 00D236 ( Main/Exploration ); précédent : 00D235; suivant : 00D237

Snail numbers, biomass and respiratory metabolism in a beech woodland — Wytham Woods, Oxford

Auteurs : J. Phillipson [Royaume-Uni] ; R. Abel [Royaume-Uni]

Source :

Oecologia [ 0029-8549 ] ; 1983-03-01.

RBID : ISTEX:439D280EE6F4EE58159F7EB67F4F2A8F2584AA33

Descripteurs français

Wicri :
- topic : Biomasse, Consommation alimentaire, Densité de population.

English descriptors

Abstract

Summary: Two methods of extraction were used in the estimation of snail population densities in woodland litter. The time-consuming-Vágvölgyi technique proved to be 6.25 times more efficient than infra-red heat extraction but it was shown that the results obtained by the latter method could be easily corrected to conform with those of the former. Snail density varied with season (Winter, 1,000–1,250 m-2, Summer, 50–600 m-2), the annual mean density being 645 m-2. The annual mean ash-free dry weight biomass was 176 mg m-2 while annual population metabolism equalled 0.8941 O2 (=17.84 kJ m-2 yr-1). Two independent estimates of the energy equivalent of food consumption gave rise to values of 25.37 and 57.98 kJ m-2 yr-1, these respectively account for 0.54 and 1.23% of the known ground litter disappearance of 4,716.58 kJ (=235 g dry wt. m-2 yr-1).

Url:

https://api.istex.fr/document/439D280EE6F4EE58159F7EB67F4F2A8F2584AA33/fulltext/pdf

DOI: 10.1007/BF00377177

Affiliations:

Links toward previous steps (curation, corpus...)

to stream Istex, to step Corpus: 002118
to stream Istex, to step Curation: 002118
to stream Istex, to step Checkpoint: 006170
to stream Main, to step Merge: 00DA97
to stream Main, to step Curation: 00D236

Le document en format XML

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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Annual course</term>
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<term>Common species</term>
<term>Daily food consumption</term>
<term>Energy equivalent</term>
<term>Extensive sampling regime</term>
<term>Extraction</term>
<term>Extraction method</term>
<term>Extraction methods</term>
<term>Field temperatures</term>
<term>Food consumption</term>
<term>Grid squares</term>
<term>Ground litter disappearance</term>
<term>Heat extraction</term>
<term>July</term>
<term>June</term>
<term>June july</term>
<term>Litter</term>
<term>Litter decomposition</term>
<term>Main site</term>
<term>Main study site</term>
<term>Metabolism</term>
<term>Monthly biomasses</term>
<term>Oecologia</term>
<term>Phillipson</term>
<term>Population densities</term>
<term>Population density</term>
<term>Population metabolism</term>
<term>Present study</term>
<term>Regression equations</term>
<term>Regteren altena</term>
<term>Respiration</term>
<term>Respiratory metabolism</term>
<term>Same site</term>
<term>Sample units</term>
<term>Sampling occasions</term>
<term>Sampling regime</term>
<term>Seasonal fluctuations</term>
<term>Snail</term>
<term>Snail densities</term>
<term>Snail density</term>
<term>Snail extraction</term>
<term>Snail population</term>
<term>Snail population densities</term>
<term>Snail population density</term>
<term>Snail populations</term>
<term>Snail respiration</term>
<term>Square metre</term>
<term>Total soil metabolism</term>
<term>Unit weight</term>
<term>Weight biomass</term>
<term>Woodland</term>
<term>Woodland litter</term>
<term>Woodland snails</term>
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<term>Wytham woods</term>
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<term>Extraction methods</term>
<term>Field temperatures</term>
<term>Food consumption</term>
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<term>Main study site</term>
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<term>Sample units</term>
<term>Sampling occasions</term>
<term>Sampling regime</term>
<term>Seasonal fluctuations</term>
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<term>Snail densities</term>
<term>Snail density</term>
<term>Snail extraction</term>
<term>Snail population</term>
<term>Snail population densities</term>
<term>Snail population density</term>
<term>Snail populations</term>
<term>Snail respiration</term>
<term>Square metre</term>
<term>Total soil metabolism</term>
<term>Unit weight</term>
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<front><div type="abstract" xml:lang="en">Summary: Two methods of extraction were used in the estimation of snail population densities in woodland litter. The time-consuming-Vágvölgyi technique proved to be 6.25 times more efficient than infra-red heat extraction but it was shown that the results obtained by the latter method could be easily corrected to conform with those of the former. Snail density varied with season (Winter, 1,000–1,250 m-2, Summer, 50–600 m-2), the annual mean density being 645 m-2. The annual mean ash-free dry weight biomass was 176 mg m-2 while annual population metabolism equalled 0.8941 O2 (=17.84 kJ m-2 yr-1). Two independent estimates of the energy equivalent of food consumption gave rise to values of 25.37 and 57.98 kJ m-2 yr-1, these respectively account for 0.54 and 1.23% of the known ground litter disappearance of 4,716.58 kJ (=235 g dry wt. m-2 yr-1).</div>
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Snail numbers, biomass and respiratory metabolism in a beech woodland — Wytham Woods, Oxford

Snail numbers, biomass and respiratory metabolism in a beech woodland — Wytham Woods, Oxford

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri