Titre :
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When grazed by Tipula paludosa, Lolium perenne is a stronger competitor of Rumex obtusifolius
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Auteurs :
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J. Ramsell ;
A. Malloch ;
J. WHITTAKER
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Type de document :
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article/chapitre/communication
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Année de publication :
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1993
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Format :
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vol. 81 no. 4 ; 777-786
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Langues:
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= Anglais
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Mots-clés:
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CROISSANCE
;
BROUTAGE ANIMAL
;
COMPETITION INTERSPECIFIQUE
;
COMPETITION INTRASPECIFIQUE
;
DENSITE POPULATION
;
SURVIE
;
TIPULA PALUDOSA
;
RUMEX OBTUSIFOLIUS
;
LOLIUM PERENNE
;
MAUVAISE HERBE
;
FACTEUR ZOOGENETIQUE
;
PHYTOPHAGE
;
TIPULIDAE
;
DIPTERA
;
INSECTA
;
ARTHROPODA
;
INVERTEBRATA
;
POLYGONACEAE
;
DICOTYLEDONES
;
ANGIOSPERMAE
;
SPERMATOPHYTA
;
GRAMINEAE
;
MONOCOTYLEDONES
;
PLANTE FOURRAGERE
;
Comportement alimentaire
;
Stade larvaire
;
Degat
;
Mecanisme d'action
;
Tipula padulosa
;
Tipulidae
;
Lolium perenne
;
Gramineae
;
Rumex obtusifolius
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Résumé :
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1) Experiments were conducted to investigate the effect of root-grazing by Tipula paludosa on competitive interactions between Rumex obtusifolius and Lolium perenne in the glasshouse. 2) Preference tests found that T. paludosa larvae preferred L. perenne to R. obtusifolius plant material, consuming twice as much of the former when presented with either the shoot material or the whole plant. 3) Competition experiments involved replacement series at a range of planting densities and the methodology of Jolliffe et al. (1984). 4 Leatherjacket grazing significantly reduced L. perenne but not R. obtusifolius dry weights in monoculture in the glasshouse
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Source :
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Journal of Ecology
|