• Corpus ID: 133932582

Reproduction of threatened, long lived semi arid Acacia within highly fragmented stands in far western NSW

  title={Reproduction of threatened, long lived semi arid Acacia within highly fragmented stands in far western NSW},
  author={Cairo N. Forrest},
  • C. Forrest
  • Published 2016
  • Environmental Science, Biology
Several Australian arid zone Acacia species are under threat because of decades of fruiting and recruitment failure that may reflect the loss of genetic diversity within small and isolated populations. We developed primers for eight microsatellite loci for Acacia carneorum and Acacia loderi. We detected high levels of clonality in each of two stands of A. carneorum (1 and 2 genets). In contrast, one stand of A. loderi was wholly clonal (1 genet), while in a second there were 30 unique genotypes… 
Isolation and Lack of Potential Mates may Threaten an Endangered Arid-Zone Acacia.
It is suggested that, given this species' vast geographic range, a small number of stands with reproductively compatible near neighbors may provide the only sources of novel genotypes.
Fate of a rare flowering event in an endangered population of Acacia pendula (Weeping Myall) from the Hunter Valley, New South Wales
A rare flowering event in a stand of Acacia pendula (Weeping Myall) (family Fabaceae, Mimosoideae) from the Hunter Valley of New South Wales is documented. This species flowers poorly in the region


Microsatellite markers for vulnerable Australian aridzone Acacias
Primers for eight microsatellite loci for Acacia carneorum and Acacia loderi allow assessment of the genetic diversity and connectedness of populations, the relative contribution of asexual reproduction to genotypic diversity and population structure, and use of paternity analysis to identify sires of seed within populations known to have set seed in past decades.
Patterns of genotypic diversity suggest a long history of clonality and population isolation in the Australian arid zone shrub Acacia carneorum
It is concluded that clonality has predominated in A. carneorum populations, with occasional sexual recruitment, and that current failure of most populations to set seed likely reflects both a long history of asexual reproduction and effects of habitat disturbance.
Influence of Habitat Patchiness on Genetic Diversity and Spatial Structure of a Serpentine Endemic Plant
The findings suggest that plant conservation strategies must take into account the natural distribution of populations, and the effects of habitat fragmentation on C. collina and other plant species that occur naturally in small, discrete patches may be unlike those that have been documented in more recently fragmented species.
Microsatellite diversity and genetic structure of fragmented populations of the rare, fire‐dependent shrub Grevillea macleayana
It is argued that natural patterns of pollen and seed dispersal, coupled with the patchy, fire‐shaped distribution, may have restricted long‐distance gene flow in the past and found a lack mutation‐drift equilibrium in some populations that is indicative of population bottlenecks.
Linking genetic diversity, mating patterns and progeny performance in fragmented populations of a Mediterranean shrub
It is concluded that contemporary mating patterns (outcrossing rates) have a more critical influence on progeny performance than either population fragmentation or the historical levels of genetic diversity.
Habitat fragmentation, genetic diversity, and inbreeding depression in a threatened grassland legume: is genetic rescue necessary?
Within population patterns of nSSR and cpSSR genetic diversity suggest that genetic diversity has not been lost over the last century of habitat fragmentation and Kincaid’s lupine is likely maintain the currently high levels of within population genetic diversity.
Genetic effects of chronic habitat fragmentation on tree species: the case of Sorbus aucuparia in a deforested Scottish landscape
Reduced pollen‐mediated gene flow is a likely consequence of habitat fragmentation, but effective seed dispersal by birds is probably helping to maintain high levels of genetic diversity within remnants and reduce genetic differentiation between them.
Microsatellite analysis of demographic genetic structure in fragmented populations of the tropical tree Symphonia globulifera
Principal component analysis reaffirmed that a bottleneck, acting in concert with pre‐existing genetic structure in the adults, had led to enhanced and rapid divergence in the seedlings following deforestation, a result that is of central interest for landscape management.