ORCID Profile
0000-0001-9170-7738
Current Organisations
Department of Biodiversity, Conservation and Attractions
,
Murdoch University
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Publisher: Springer Science and Business Media LLC
Date: 29-03-2023
Publisher: Wiley
Date: 12-09-2023
DOI: 10.1002/PPP3.10421
Publisher: CSIRO Publishing
Date: 2007
DOI: 10.1071/BT06173
Abstract: Ex situ seed conservation aims to support species survival in the wild. This can be achieved by contributing genetic material for reintroduction. The goals of reintroduction are to increase both plant and population numbers, create self-sustaining populations and ultimately remove a species from its threatened listing. Quality seed collections with a broad genetic base are required to achieve this goal. Storage conditions that minimise deterioration of seeds will maximise the quality of seeds available for future use. Additionally, ex situ seed conservation provides long-term insurance against species or genotype loss until actual or potential threats can be removed. As threats to bio ersity escalate the most judicious conservation strategies will be ones that combine available resources to provide the highest possible degree of protection. Banked seeds are available irrespective of season and periods of low fecundity. Forward planning of reintroduction projects can be achieved with knowledge of the quantity and quality of banked seed. This paper discusses the challenges facing ex situ seed conservation while highlighting the benefits of integrating ex situ seed storage and plant reintroduction to help provide for better conservation outcomes.
Publisher: CSIRO Publishing
Date: 17-03-2023
DOI: 10.1071/BT22071
Abstract: Context As threatening processes continue to impact rare plant populations, the use of translocations is becoming increasingly frequent. The ultimate success of translocation, attaining long-term persistence, is determined by species’ ability to reproduce, recruit, and maintain levels of genetic ersity that permits the capacity to adapt to environmental change. Aims This study aimed to assess translocation success of Banksia brownii. Methods We compared genetic ersity, reproductive output and aspects of the mating system of a translocated population with four reference wild populations. Key results We found that the use of multiple source populations for the translocation resulted in levels of genetic ersity comparable to reference populations of high ersity. Reproductive output was highest in the translocated population and a positive relationship between plant size and number of flowers across all populations was evident. However, mating system analysis revealed a large difference in outcrossing rates between populations in different habitats despite common pollinators, with the translocated population having the highest rates of selfing. Conclusion Whilst genetic ersity and reproductive output were comparable or higher in the translocated population than in the reference populations, assessing translocation outcomes by these measures alone can potentially mask the longer-term erosion of genetic ersity through unfavourable patterns of mating. Implications We recommend using multiple metrics of reproductive, recruitment and genetic ersity to properly assess plant translocation success.
Publisher: CSIRO Publishing
Date: 27-07-2022
DOI: 10.1071/BT22006
Abstract: Context To establish translocated populations of threatened plants with the genetic resources to adapt to changing environmental conditions, the source of propagation material is an important consideration. Aim We investigated the fitness consequences of genetic rescue and admixture for the threatened annual daisy Schoenia filifolia subsp. subulifolia, and the common S. filifolia subsp. filifolia, to inform seed-sourcing strategies for translocations of the threatened subspecies. Methods We evaluated genetic ersity of two populations of S. filifolia subsp. subulifolia and four populations of S. filifolia subsp. filifolia by using microsatellite markers. We grew seedlings from each study population and cross-pollinated inflorescences within and among populations of the same subspecies, and between subspecies. We evaluated the fitness consequences of each cross by using seed set, seed weight and seed viability. Key results There was a lower genetic ersity in the small ( plants, Nar = 3.28, He = 0.42) compared to the large ( 000 plants, Nar = 4.42, He = 0.51) population of S. filifolia subsp. subulifolia, although none of the measures was significantly different, and seed fitness was slightly, although not significantly, reduced in interpopulation crosses compared with the small population. Genetic ersity was similar between the threatened and widespread subspecies however, the subspecies were genetically ergent (Fst = 0.242–0.294) and cross-pollination between subspecies produced negligible amounts of seeds ( % seed set). Conclusions Although genetic rescue or admixture of S. filifolia subsp. subulifolia would not necessarily result in greatly increased levels of genetic ersity or seed fitness, we still consider it a potential option. Negligible seed set in crosses between subspecies indicates that deliberate hybridisation is not a possibility. Implications Studies of fitness consequences of admixture or genetic rescue are rare yet critical to assessing the benefits of different translocation strategies.
Publisher: Wiley
Date: 09-07-2019
DOI: 10.1111/AEC.12802
Publisher: Wiley
Date: 03-06-2021
DOI: 10.1111/REC.13369
Abstract: There is an increasing need to establish populations of threatened plants in threat‐free habitat to prevent species extinction. The amount of genetic ersity in founding plants will influence whether the new population has the capacity to persist and evolve over time, and factors that influence the maintenance of genetic ersity, such as the mating systems, will also play a role in population persistence. We developed 13 nuclear microsatellite markers and used these to evaluate genetic ersity and mating system parameters of three translocated populations of two subspecies of Lambertia orbifolia , and compared these parameters to seven wild populations. Genetic ersity was maintained in the translocated population of L. orbifolia subsp. Scott River Plains, established using a single source population ( N ar = 3.270 and H e = 0.478 in translocated population N ar = 3.280 and H e = 0.534 in wild populations), and maintained or increased in the two admixed translocated populations of L. orbifolia subsp. orbifolia ( N ar = 3.115, 3.830 and H e = 0.511, 0.635 in translocated populations N ar = 2.708 and H e = 0.438 in wild populations) compared to wild populations of each subspecies. Mating system parameters were comparable between translocated and wild populations of L. orbifolia subsp. Scott River Plains indicating the likelihood of genetic ersity being maintained in future generations. However, there was increased selfing in translocated populations of L. orbifolia subsp. o rbifolia , suggesting suboptimal pollination and high values for the inbreeding coefficient in these admixed populations ( F is = 0.474, 0.275), which may be an artifact of the Wahlund effect or from less fit (inbred) seedlings surviving ex situ propagation and translocation.
Publisher: Island Press/Center for Resource Economics
Date: 2012
Location: Australia
No related grants have been discovered for Leonie Monks.