Article (Scientific journals)
Frugivorous birds influence the spatial organization of tropical forests through the generation of seedling recruitment foci under zoochoric trees
Trolliet, Franck; Forget, Pierre-Michel; Doucet, Jean-Louis et al.
2017In Acta Oecologica, 85, p. 69-76
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Keywords :
Seed dispersal; Regeneration; Seedling community; Staudtia kamerunensis; Contagious
Abstract :
[en] Animal-mediated seed dispersal is recognized to influence the spatial organization of plant communities but little is known about how frugivores cause such patterns. Here, we explored the role of hornbills and primates in generating recruitment foci under two zoochoric trees, namely Staudtia kamerunensis (Myristicaceae) and Dialium spp. (Fabaceae - Caesalpiniodea) in a forest-savanna mosaic landscape in D.R. Congo. We also examined the influence of the availability of fruits in the neighborhood and the amount of forest cover in the landscape on such clumping patterns. The density and species richness of hornbill-dispersed and the density of primate-dispersed seedlings were significantly higher under Staudtia kamerunensis trees than at control locations. However, we did not find such patterns under Dialium spp. trees compared to control locations except for the density of hornbill-dispersed seedlings which was lower at control locations. Also, we found that an increasing amount of forest cover in the landscape was associated with an increase in the density of hornbill-dispersed seedlings, although the tendency was weak (R2 = 0.065). We concluded that S. kamerunensis acts as a recruitment foci and plays a structuring role in Afrotropical forests. Hornbills were probably the main frugivore taxon responsible for the clumping under that tree and appear as a key ecological component in fragmented and disturbed landscapes where the diversity of large frugivores such as primates is reduced. Our findings improve our understanding of the causal mechanisms responsible for the spatial organization of tropical forests.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Trolliet, Franck ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Modélisation du climat et des cycles biogéochimiques
Forget, Pierre-Michel
Doucet, Jean-Louis  ;  Université de Liège - ULiège > Ingénierie des biosystèmes (Biose) > Laboratoire de Foresterie des régions trop. et subtropicales
Gillet, Jean-François
Hambuckers, Alain  ;  Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale
Language :
English
Title :
Frugivorous birds influence the spatial organization of tropical forests through the generation of seedling recruitment foci under zoochoric trees
Publication date :
2017
Journal title :
Acta Oecologica
ISSN :
1146-609X
eISSN :
1873-6238
Publisher :
Elsevier, Paris, France
Volume :
85
Pages :
69-76
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
BELSPO - Politique scientifique fédérale
F.R.S.-FNRS - Fonds de la Recherche Scientifique
FRIA - Fonds pour la Formation à la Recherche dans l'Industrie et dans l'Agriculture
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