Western Myall (Acacia sowdenii), its survival prospects and management needs.

Lange, R. T.; Purdie, Rosemary

doi:10.1071/rj9760064

Cited by 42 publications

(32 citation statements)

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“…It is known that wild rabbits, Oryctolagus cuniculus (L.), suppress the regeneration of many species of native trees and shrubs in Australia (Jessup 1951;Hall et al 1964;Cochrane & McDonald 1966;Johnston 1968;Crisp & Lange 1976;Lange & Purdie 1976;Crisp 1978;Lange & Graham 1983). However, many of these studies have been made in arid and semi-arid regions where the depredations of rabbits are often severe and obvious.…”

Section: Introductionmentioning

confidence: 94%

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The effects of rabbit grazing on regeneration of sheoaks, Allocasuarina verticilliata and saltwater ti‐trees, Melaleuca halmaturorum, in the Coorong National Park, South Australia

Cooke

1988

Australian Journal of Ecology

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Sheoaks and saltwater ti-trees regenerate poorly within the Coorong National Park unless they are protected from grazing mammals. The age structure of these tree populations suggests that both species regenerated vigorously in the 1950s when myxomatosis kept rabbit numbers low. Experiments demonstrated that unprotected seedlings are quickly found and eaten by rabbits, particularly if alternative foods are scarce.Sufficient numbers of ti-trees are presently recruited to ensure the persistence of that species, but a progratntne of rabbit control would be necessary to enable natural regeneration to perpetuate the sheoak population in the Coorong National Park.

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Section: Introductionmentioning

confidence: 94%

“…The presence of fire scars and dead limbs on the trees was also noted. The apparent stage of life of each tree was classified as seedling, juvenile, mature or senescent, after the broad categories suggested by Lange and Purdie (1976). These categories are based on growth form rather than size or sexual maturity.…”

Section: Measurement Of Treesmentioning

confidence: 99%

The effects of rabbit grazing on regeneration of sheoaks, Allocasuarina verticilliata and saltwater ti‐trees, Melaleuca halmaturorum, in the Coorong National Park, South Australia

Cooke

1988

Australian Journal of Ecology

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“…The effect of such changes on bee populations could be considerable. For example in the southern arid regions of Australia, the lack of regeneration of Western Myall due to rabbit, goat and sheep grazing (Lange and Purdie, 1976), may seriously affect the survival of the endemic allodapine bee Exoneurella tridentata, because this species depends largely on the dead branches of this tree for nesting substrate (Hurst, unpubl. data).…”

Section: Deforestation and Agriculturementioning

confidence: 99%

Diversity and conservation status of native Australian bees

Batley

Hogendoorn

2009

Apidologie

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-Australia's idiosyncratic bee fauna is characterised by a combination of numerous endemic taxa and by the complete absence of some families. Many species, and in particular several oligolectic species, remain undescribed and more than half the named taxa are in need of revision. The main threats to the native bee fauna include removal of nesting and foraging opportunities through land clearing and agriculture, the spread of exotic plant species and the consequences of climate change. Early steps to conserve the native bee fauna include commercial applications, the raising of public awareness and preservation of natural habitat. However, these actions are severely hampered by a lack of both identification keys and taxonomic expertise. Considerable investment in taxonomic research is needed to improve this state of affairs.native bees / Australia / conservation / taxonomy / Apoidea

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“…The water point in Railway paddock was established in 1937, compared with 1966 for Purpunda and 1975 for Overland, and the stocking rate of 6 ha sheep À1 was higher than either Overland (9 ha sheep À1 ) or Purpunda (6?7 ha sheep À1 ). The lowest cover values of M. sedifolia also occurred in Group 1 quadrats, but especially at distances far from the water point, and although M. sedifolia is thought to live more than 300 years (Crisp, 1978), it can decline through increased mortality, lack of recruitment or altered environmental conditions in grazed areas (Lange & Purdie, 1976;Crisp, 1978;Lange & Graham, 1983). High cover by species such as M. sedifolia and A. vesicaria also corresponds to the natural chenopod low open shrubland association described for the region by Reid (1984).…”

Section: Discussionmentioning

confidence: 95%

The piosphere revisited: plant species patterns close to waterpoints in small, fenced paddocks in chenopod shrublands of South Australia

Heshmatti

Conran

2002

Journal of Arid Environments

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The Waite-Nicolson rangeland management method for semi-arid chenopod shrublands predicts that smaller paddocks with medium to moderate stocking rates help to preserve the native vegetation. Vegetation cover around waterpoints in three small paddocks (o2000 ha) from Middleback Station, South Australia was studied using multivariate analysis. Data from quadrats sampled along radiating transects were tested for correlations with a number of site features and grazing history factors. Two significant associations were detected: quadrats with an abundance of Rhagodia parabolica and less palatable species such as Maireana pyramidata, and Atriplex stipitata were correlated positively with proximity to water points, paddock age and stocking rate, and negatively with paddock size. In contrast, quadrats with species such as Rhagodia ulicina and the more palatable M. sedifolia were correlated with increasing distance from the water points and paddock size, but negatively with age and stocking rates. Transect direction was not correlated with either group. Twelve of the 20 species examined, including the important forage species A. vesicaria, also were not correlated with those paddock and grazing features included here. These results suggest that the distribution of some chenopod shrub species in fenced paddocks is still possibly affected by a combination of these factors in the long term by grazing at densities of 6 ha sheep À1 and that the method, although maintaining the fodder species, may not be preserving biodiversity at these grazing levels, although further study is needed.

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Western Myall (Acacia sowdenii), its survival prospects and management needs.

Abstract: Studies on western myall rangelands are reported which show from population structure that Acacia sowdenii woodlands will not survive under present circumstances. Evidence is evaluated to allow informed discussion of landuse and management options affecting western myall.

Cited by 42 publications

References 0 publications

The effects of rabbit grazing on regeneration of sheoaks, Allocasuarina verticilliata and saltwater ti‐trees, Melaleuca halmaturorum, in the Coorong National Park, South Australia

The effects of rabbit grazing on regeneration of sheoaks, Allocasuarina verticilliata and saltwater ti‐trees, Melaleuca halmaturorum, in the Coorong National Park, South Australia

Diversity and conservation status of native Australian bees

The piosphere revisited: plant species patterns close to waterpoints in small, fenced paddocks in chenopod shrublands of South Australia

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