Nom du corpus

Corpus Systématique Végétale

Titre du document

The significance of carnivory for the fitness of Drosera in its natural habitat

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Mots-clés d'auteur
  • Carnivorous plants
  • Drosera
  • Limiting factor
  • Competition
  • Niche segregation
Nom du fichier dans la ressource
Syst_veg6_v2_002011
Auteur(s)
  • Martin Thum
Affiliation(s)
  • Zoologisches Institut der Universität München, Seidlstraße 25, D-8000, München 2, Germany
Résumé

The effects on Drosera intermedia and D. rotundifolia of supplementary feeding with Drosophila melanogaster were studied in plants growing in their natural habitat. The artificial food supply was within the natural range of prey quantity. In both species supplementary feeding led to significantly higher dry weights of summer and winter plant, more leaves, more flowers, more seeds, and a larger trapping area. The dry weight of plants increased much more than the dry weight of prey added, indicating a “fertilizing effect”. Thus, animal food supply is an important limiting factor in the field. The essential component of the prey is probably its mineral content. There were significant differences between the two species of sundew. In D. rotundifolia the effect of feeding on dry weight was smaller and plants nerver showed axillary budding. However the effect on the percentage of blooming plants was more than twice as strong as in D. intermedia. Considering only the prey actually absorbed per unit of plant biomass, both species show about the same fertilizing effect. The number of fruits per unit of biomass was about twice as large in D. rotundifolia as in D. intermedia. The reasons for these differences are discussed in the light of niche segregation with respect to habitat and range of prey.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - ecology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - ecology
Identifiant ISTEX
9B99A961D9172C88C331E0B0B5EE168783F6E3CB
Revue

Oecologia

Année de publication
1988
Présence de XML structuré
Non
Score qualité du texte
9.544
Version PDF
1.3
Type de publication
Journal
ark:/67375/1BB-039D8VVK-P
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