Shifts in reproductive assurance strategies and inbreeding costs associated with habitat fragmentation in Central American mahogany

M.F. Breed; M.G. Gardner; K.M. Ottewell; C.M. Navarro; A.J. Lowe

doi:10.1111/j.1461-0248.2012.01752.x

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Shifts in reproductive assurance strategies and inbreeding costs associated with habitat fragmentation in Central American mahogany

Journal article

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Shifts in reproductive assurance strategies and inbreeding costs associated with habitat fragmentation in Central American mahogany

M.F. Breed, M.G. Gardner, K.M. Ottewell, C.M. Navarro and A.J. Lowe

Ecology Letters, Vol.15(5), pp.444-452

2012

DOI: https://doi.org/10.1111/j.1461-0248.2012.01752.x

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Abstract

The influence of habitat fragmentation on mating patterns and progeny fitness in trees is critical for understanding the long-term impact of contemporary landscape change on the sustainability of biodiversity. We examined the relationship between mating patterns, using microsatellites, and fitness of progeny, in a common garden trial, for the insect-pollinated big-leaf mahogany, Swietenia macrophylla King, sourced from forests and isolated trees in 16 populations across Central America. As expected, isolated trees had disrupted mating patterns and reduced fitness. However, for dry provenances, fitness was negatively related to correlated paternity, while for mesic provenances, fitness was correlated positively with outcrossing rate and negatively with correlated paternity. Poorer performance of mesic provenances is likely because of reduced effective pollen donor density due to poorer environmental suitability and greater disturbance history. Our results demonstrate a differential shift in reproductive assurance and inbreeding costs in mahogany, driven by exploitation history and contemporary landscape context.

Details

Title: Shifts in reproductive assurance strategies and inbreeding costs associated with habitat fragmentation in Central American mahogany
Authors/Creators: M.F. Breed (Author/Creator)
M.G. Gardner (Author/Creator)
K.M. Ottewell (Author/Creator)
C.M. Navarro (Author/Creator)
A.J. Lowe (Author/Creator)
Publication Details: Ecology Letters, Vol.15(5), pp.444-452
Publisher: Wiley-Blackwell
Identifiers: 991005540490107891
Murdoch Affiliation: Murdoch University
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.64 Phylogenetics & Genomics; 3.64.71 Genetic Diversity
Web Of Science research areas: Ecology
ESI research areas: Environment/Ecology