How to calculate leaf litter consumption by saprophagous macrofauna?
Identifieur interne : 004068 ( Main/Exploration ); précédent : 004067; suivant : 004069How to calculate leaf litter consumption by saprophagous macrofauna?
Auteurs : Jean-François David [France]Source :
- European Journal of Soil Biology [ 1164-5563 ] ; 1998.
English descriptors
Abstract
Abstract: Leaf litter, as food for saprophagous macrofauna, loses dry mass with time whether consumed or not, and this affects estimates of food consumption based on gravimetric methods. A model combining discontinuous consumption of food with continuous, exponential decomposition of litter makes it possible to compare the accuracy of various formulae used in calculating the amount of food consumed. Bocock's formula yields an underestimate, unless consumption takes place at the very end of feeding tests. The Reiman formula yields an overestimate, unless consumption takes place at the very beginning of tests. A new formula giving an intermediate estimate is proposed and it is shown that this is the most accurate for most patterns of feeding. Calculations taking no account of decomposition (no control) may lead to substantial overestimates, especially if the amount of litter actually consumed is small in comparison with the initial amount.
Url:
DOI: 10.1016/S1164-5563(00)88647-1
Affiliations:
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