La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Reproductive constraints for the long-term persistence of fragmented Acacia dealbata (Mimosaceae) populations in southeast Australia
Auteurs :	Linda M. Broadhurst, Auteur ; Andrew G. Young, Auteur
Type de document :	Article
Dans :	Biological Conservation (133(4) DEC 2006)
Article en page(s) :	512-526
Langues:	Anglais
Résumé :	Fragmented and degraded vegetation characterises agricultural landscapes across southern Australian. Remnant vegetation within these regions performs a number of vital ecological and hydrological roles, but little is known about whether or how fragmentation is affecting the long-term persistence of these critical landscape elements. Acacias are a significant component of many remnant vegetation communities across Australia, forming numerous integral faunal and floral relationships. Here, reproductive output of 11 fragmented Acacia dealbata (Mimosaceae) populations from across the southern tablelands of New South Wales was assessed over 2 years to identify reproductive constraints associated with increasing vegetation fragmentation. Fertilization success is the major reproductive constraint, particularly in small populations, and probably reflects a self-incompatible reproductive strategy. During 2002 larger and more dense populations produced more legumes (p=0.014 and

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