Weeds and propagule type influence translocation success in the endangered Whibley Wattle, <i>Acacia whibleyana</i> (Leguminosae: Mimosoideae)

Jusaitis, M.; Polomka, Lesley

doi:10.1111/j.1442-8903.2008.00392.x

Cited by 9 publications

(12 citation statements)

References 13 publications

(13 reference statements)

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“…Translocation, the movement of individuals to another area, has been extensively used as a tool for conservation and management both in plants (Maunder, 1992;Jusaitis and Polomka, 2008) and animals (McGrady et al, 1994;Hauser et al, 1995;Denton et al, 1997;Yamamoto et al, 2006;Hochkirch et al, 2007;Kinley and Newhouse, 2008). Translocation is likely to become more commonly used as a conservation tool as existing populations are threatened in response to impacts such as climate change, or as formerly degraded habitats are restored (Hendrickson and Brooks, 1991;Maitland and Lyle, 1992).…”

Section: Introductionmentioning

confidence: 97%

Morphological and ecological responses to a conservation translocation of powan (Coregonus lavaretus) in Scotland

Etheridge

Bean

Maitland

et al. 2010

Aquatic Conservation

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ABSTRACT1. The establishment of refuge populations has become a common management tool for threatened fish species in recent years, yet the effects of translocation are not fully understood in a conservation context.2. This paper examines the hypothesis that phenotypic changes have occurred during the formation of two refuge populations of the nationally rare powan (a freshwater fish species) which were established in Loch Sloy and Carron Valley Reservoir in Scotland.3. Significant differences in head morphology, size and growth between the founder and refuge populations and between the two refuge populations were demonstrated. These changes are probably due to a combination of founder effects, intense selection and phenotypic plasticity. These changes can undermine the rationale behind the establishment of refuge populations.4. The results call into question the usefulness of translocation as a conservation measure; however, there are times when this is the only viable management option available. The future of translocation and the validity of establishing refuge populations for powan conservation are discussed.

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Section: Introductionmentioning

confidence: 97%

Morphological and ecological responses to a conservation translocation of powan (Coregonus lavaretus) in Scotland

Etheridge

Bean

Maitland

et al. 2010

Aquatic Conservation

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“…There have been significant investments to aid its conservation, and it is part of the Australian Government's 30 by 2020 Threatened Species Strategy [18]. Land clearing has limited its suitable habitat, and ongoing low seed set and lack of natural recruitment, as well as competition from weeds, are some of its key threatening processes [19][20][21]. One of the priority conservation actions for A. whibleyana is to establish new translocated populations [19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Increased Genetic Diversity via Gene Flow Provides Hope for Acacia whibleyana, an Endangered Wattle Facing Extinction

et al. 2020

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In this paper we apply a conservation genomics approach to make evidence-based management recommendations for Acacia whibleyana, an endangered shrub endemic to Eyre Peninsula, South Australia. We used population genomic analysis to assess genetic connectivity, diversity, and historical inbreeding across all known stands of the species sampling remnant stands, revegetated stands of unknown origin, and a post-fire seedling cohort. Our results indicate a degree of historical connectivity across the landscape, but habitat loss and/or pollinator community disruption are potential causes of strong genetic structure across the remnant stands. Remnant stands had low genetic diversity and showed evidence of historical inbreeding, but only low levels of intra-stand relatedness indicating that risks of contemporary inbreeding are low. Analysis of a post-fire first generation cohort of seedlings showed they likely resulted from intra-stand matings, resulting in reduced genetic diversity compared to the parents. However, admixed seedlings in this cohort showed an increase in heterozygosity relative to likely sources and the non-admixed seedlings of the same stand. Assisted inter-stand gene flow may prove an effective management strategy to boost heterozygosity and corresponding increases in adapting capacity in this endangered species.

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“…Where biodiversity gains are the primary aim of the revegetation, it is possible that a combined approach including both sowing and planting may prove most fruitful. Hardier or more reliable species may be sown, combined with planting and guarding of more palatable or keystone or rare species (Jusaitis & Polomka ). Alternatively, Schneemann and McElhinny () suggest tube‐stock planting of overstorey species and direct seeding of mid‐ and understorey species to minimise competition, achieve appropriate stem densities and maximise species diversity.…”

Section: Discussionmentioning

confidence: 99%

Should I plant or should I sow? Restoration outcomes compared across seven riparian revegetation projects

Greet¹,

Ede²,

Robertson³

et al. 2019

Eco Management Restoration

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Robertson is a Waterways and LandOfficer with Melbourne Water (990 La Trobe St, Docklands, Vic. 3008; Email: dan.robertson@ melbournewater.com.au). This project arose from research into revegetation outcomes to inform improvement of revegetation practices along riparian areas by Melbourne Water.Summary To revegetate native plant communities, it is often cheaper to direct seed than to plant nursery-grown stock. However, the outcomes of direct seeding can be quite variable, and it is unclear whether direct seeding or planting is more likely to facilitate the restoration of diverse plant communities. To address this question, we compared the outcomes of each method across several recent riparian revegetation projects where both direct seeding and tube-stock planting were used. We surveyed riparian revegetation projects at seven sites within the greater Melbourne area that had been revegetated between 1 and 4 years previously. Sites were all on land previously used for agriculture or degraded public land and ranged in environmental and climatic conditions. Woody plant density, establishment of target species, species richness, species diversity (evenness) and plant heights were assessed. Direct seeding tended to result in higher plant densities and similar species richness, but lower rates of species establishment and diversity compared with planting. A median of 67% of target species established via direct seeding compared with 100% for planting, with direct seeded areas often dominated by one or two species. In general, overall revegetation outcomes were often driven by climatic and site factors, rather than revegetation method. We suggest that to achieve good restoration outcomes from revegetation in riparian areas, a bet-hedging or combined approach using both sowing and planting may be the best strategy.

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Weeds and propagule type influence translocation success in the endangered Whibley Wattle, Acacia whibleyana (Leguminosae: Mimosoideae)

Cited by 9 publications

References 13 publications

Morphological and ecological responses to a conservation translocation of powan (Coregonus lavaretus) in Scotland

Morphological and ecological responses to a conservation translocation of powan (Coregonus lavaretus) in Scotland

Increased Genetic Diversity via Gene Flow Provides Hope for Acacia whibleyana, an Endangered Wattle Facing Extinction

Should I plant or should I sow? Restoration outcomes compared across seven riparian revegetation projects

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