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A journal dedicated to conservation and wildlife management in the Pacific region.
RESEARCH ARTICLE

Rarity, taxonomy and genetics: the chequered history of Grevillea williamsonii (Proteaceae)

Elizabeth A. James A D , Gillian K. Brown B , Rebecca Jordan C and Daniel J. Ohlsen A
+ Author Affiliations
- Author Affiliations

A Royal Botanic Gardens Victoria, Private Bag 2000, South Yarra, Vic. 3141, Australia.

B Queensland Herbarium, DSITI, Brisbane Botanic Gardens, Mt Coot-tha Road, Toowong, Qld 4069, Australia.

C CSIRO Land and Water, 15 College Rd, Sandy Bay, Tas. 7005, Australia.

D Corresponding author. Email: elizabeth.james@rbg.vic.gov.au

Pacific Conservation Biology 24(3) 329-338 https://doi.org/10.1071/PC17050
Submitted: 29 November 2017  Accepted: 1 April 2018   Published: 4 June 2018

Abstract

Resolving uncertainty surrounding the taxonomic and conservation status of rare plants is of utmost importance to enable effective allocation of the limited resources available for conserving biodiversity. Prioritising threatened taxa that are more appropriately regarded as synonymous with more common species represents a waste of resources. Such a scenario may apply to the Australian entity Grevillea williamsonii and consequently its taxonomic status was investigated using chloroplast DNA sequences and nuclear microsatellite data. Haplotype network and genetic structure analyses showed that G. williamsonii was not genetically distinct from, and should be synonymised with, the variable and morphologically similar but more common G. aquifolium. This study highlights the benefit of undertaking genetic analyses where questionable taxonomic status biases conservation prioritisation and management decisions.

Additional keywords: conservation priorities, genetic lineage, synonymisation, taxonomic uncertainty


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