Acacia dealbata subsp. subalpina (Fabaceae: Mimosoideae), a new subspecies from south-eastern Australia

Kodela, Phillip; Tindale, Mary

doi:10.7751/telopea20013004

Cited by 8 publications

(20 citation statements)

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“…(although down to 300 m a.s.l. in a few cases); with a wider range of annual precipitation: 500-1600 versus 600-700 mm (Kodela and Tindale 2001;www.florabank.org.au, accessed 20 February 2016). Subspecies dealbata has been described as being generally taller than ssp.…”

Section: Introductionmentioning

confidence: 99%

Unresolved native range taxonomy complicates inferences in invasion ecology: Acacia dealbata Link as an example

et al. 2017

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Elaborate and expensive endeavours are underway worldwide to understand and manage biological invasions. However, the success of such efforts can be jeopardised due to taxonomic uncertainty. We highlight how unresolved native range taxonomy can complicate inferences in invasion ecology using the invasive tree Acacia dealbata in South Africa as an example. Acacia dealbata is thought to comprise two subspecies based on morphological characteristics and environmental requirements within its native range in Australia: ssp. dealbata and spp. subalpina. Biological control is the most promising option for managing invasive A. dealbata populations in South Africa, but it remains unknown which genetic/taxonomic entities are present in the country. Resolving this question is crucial for selecting appropriate biological control agents and for identifying areas with the highest invasion risk. We used species distribution models (SDMs) and phylogeographic approaches to address this issue. The ability of subspecies-specific and overall species SDMs to predict occurrences in South Africa was also explored. Furthermore, as non-overlapping bioclimatic niches between the two taxonomic entities may translate into evolutionary distinctiveness, we also tested genetic distances between the entities using DNA sequencing data and network analysis. Both approaches were unable to differentiate the two putative subspecies of A. dealbata. However, the SDM approach revealed a potential niche shift in the non-native range, and DNA sequencing results suggested repeated introductions of different native provenances into South Africa. Our findings provide important information for ongoing biological control attempts and highlight the importance of resolving taxonomic uncertainties in invasion ecology.

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Section: Introductionmentioning

confidence: 99%

Unresolved native range taxonomy complicates inferences in invasion ecology: Acacia dealbata Link as an example

et al. 2017

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“…Vachellia farnesiana is native to central America, but it had arrived in Australia before 1788, via the Philippines according to Kodela and Tindale (2001). Bean (2007) argued more plausibly that it came from Taiwan with the Dutch explorers, given that 'popinac (Acacia farnsiana [sic]) .…”

Section: Vachellia Farnesiana (L) Wight and Arnmentioning

confidence: 99%

Unwelcome guests: a selective history of weed introductions to arid and semi-arid Australia

Friedel¹

2020

Aust. J. Bot.

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Following European settlement of Australia, numerous plant species were deliberately introduced for use in crops, pastures, gardens and horticulture, and others arrived by chance. Many subsequently escaped and became weedy. Of the 54 weed species of natural environments of arid and semi-arid Australia that are considered here, 27 were apparently accidentally introduced, 20 were intentionally introduced and 7 were probably introduced both accidentally and intentionally. Livestock including camels and their harness, and contaminated seed and hay were the most common vectors for accidental introduction. Amongst intentional introductions, rather more ornamental species appear to have invaded successfully than pasture species, but the former generally occupy niche habitats. Recent new introductions are few due to pre-border, border and post-border protections, but many current arid zone weeds continue to spread. Understanding the history of weed invasions can help to guide current and future management by clarifying pathways for introduction.

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“…The species also has generalist pollination requirements and seed-dispersal syndromes (Carr, 2001). Based on morphology and environmental requirements, it was previously thought that A. dealbata consisted of two subspecies (Kodela & Tindale, 2001). However, recent studies based on a combination of ecological niche modelling, DNA sequencing analyses and microsatellite genotyping questioned this taxonomic division (Hirsch et al, 2017(Hirsch et al, , 2018.…”

Section: Introductionmentioning

confidence: 99%

Genetic analyses reveal complex introduction histories for the invasive tree Acacia dealbata Link around the world

Hirsch

Richardson

Pauchard

et al. 2020

Diversity and Distributions

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Acacia dealbata subsp. subalpina (Fabaceae: Mimosoideae), a new subspecies from south-eastern Australia

Cited by 8 publications

References 0 publications

Unresolved native range taxonomy complicates inferences in invasion ecology: Acacia dealbata Link as an example

Unresolved native range taxonomy complicates inferences in invasion ecology: Acacia dealbata Link as an example

Unwelcome guests: a selective history of weed introductions to arid and semi-arid Australia

Genetic analyses reveal complex introduction histories for the invasive tree Acacia dealbata Link around the world

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