Barois I., Lavelle P., Brossard Michel, Tondoh Jérôme, Angeles Martinez M. de los, Rossi J.P., Senapati B.K., Angeles A., Fragoso C., Jimenez J.J., Decaëns Thibaud, Lattaud C., Kanyonyo J., Blanchart Eric, Chapuis Lydie, Brown George, Moreno A. (1999). Ecology of earthworm species with large environmental tolerance and/or extended distributions. In :
Lavelle P. (ed.), Brussaard L. (ed.), Hendrix P. (ed.). Earthworm management in tropical agroecosystems. Wallingford : CABI, p. 57-85. ISBN 0-85199-270-6.
Titre du document
Ecology of earthworm species with large environmental tolerance and/or extended distributions
Année de publication
1999
Type de document
Partie d'ouvrage
Auteurs
Barois I., Lavelle P., Brossard Michel, Tondoh Jérôme, Angeles Martinez M. de los, Rossi J.P., Senapati B.K., Angeles A., Fragoso C., Jimenez J.J., Decaëns Thibaud, Lattaud C., Kanyonyo J., Blanchart Eric, Chapuis Lydie, Brown George, Moreno A.
In
Lavelle P. (ed.), Brussaard L. (ed.), Hendrix P. (ed.), Earthworm management in tropical agroecosystems
Source
Wallingford : CABI, 1999,
p. 57-85 ISBN 0-85199-270-6
Ecological and demographic parameters of 26 species of native and exotic earthworms species common in tropical agroecosystems, with large environmental tolerance and/or extended distribution were investigated. Principal component analysis (PCA) isolated four groups : (i) large native endogeic and anecic species (16-32 g individual fresh wt) with long generation time (2-4 years), low fecundity (0.5-3.1 cocoons/year/adult) and one hatchling per cocoon ; (ii) medium size species (1.2-6 g) endogeic mesohumic, with intermediate fecundity (1.3-45 cocoons/year/adult) ; (iii) small species (0.17-1.25 g f.w.) mainly endogeic polyhumic, with short generation time (3-7 months), intermediate fecundity (10-68 cocoons/year/adult) and one hatchling per cocoon ; and (iv) generally small (80-150 mg f.w.) species mainly exotic and epigeic, with short generation time (1-3 months), very high fecundity (50-350 cocoons/year/adult) and up to three hatchlings per cocoon. Casts may be either large globular or small granular. The selective investigations of large organic particles and small mineral particles (clays) concentrates total organic matter in the casts. There is an intense mineralization rate of nitrogen in the casts (6-29% of organic N), exotic worms seeming to be less efficient than natives at mineralizing N. The mineral phosphorus content of casts is always at least 30% higher than in the non-ingested soil. All these worms ingest daily, on average, three times their own weight of soil at the adult stage (1-9) and much more when juvenile ; up to 1000 Mg dry soil/ha may transit yearly through earthworm guts. (Résumé d'auteur)
Plan de classement
Macrofaune [074FAUSOL03]
Descripteurs
LOMBRIC ; STRUCTURE DU SOL ; ECOLOGIE ; DYNAMIQUE DE POPULATION ; FECONDITE ; CLASSIFICATION ; DISTRIBUTION SPATIALE ; MATIERE ORGANIQUE ; MINERALISATION ; AZOTE ; NUTRIMENT ; PHOSPHORE
Description Géographique
ZONE TROPICALE
Localisation
Fonds IRD [F A010021553]
Identifiant IRD
fdi:010021556
