Journal ArticleDOI
The Shrubs of Poplar Box (Eucalyptus populnea) Lands and their Biology.
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Of the 25 species of shrubs common in poplar box lands, 17 are considered to have reached the status of being a "woody weed" in New South Wales and/or Queensland.Abstract:
Of the 25 species of shrubs common in poplar box lands, 17 are considered to have reached the status of being a "woody weed" in New South Wales and/or Queensland. Thickening up of scrub in pastoral areas appears to have been episodic after periods of above-average rainfall. Germination of seed may occur at most times of the year if soil moisture is high. Fire promotes germination of species with hard seeds (some Acacia, Cassia and Dodonaea spp.). Increased shrub density usually follows soil disturbance if seed is present, and once established, the individuals of most apecies appear to be long-lived. Productivity of shrub communities is commensurate with rainfall. The species are well adapted to tolerate drought and they retain leaves under extreme water stress. Most species flower and set seed each year in the spring and summer period but in more arid parts of poplar box lands some species reproduce opportunistically after good rainfall. In favourable conditions most species produce copious quantities of seed. Dormancy is common in seed recently shed and loss of dormancy may occur within months or up to 3 years after seed shed. All species are subject to invertebrate and vertebrate predation and death of individuals or whole populations may sometimes result. A few species are moderately palatable to domestic livestock and native herbivores; the majority are rarely eaten even by starving animals. The regenerative ability of shrubs following fire or grazing differs amongst species and is affected by shrub size.read more
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BookDOI
Vegetation science applications for rangeland analysis and management.
TL;DR: In this article, the authors present a taxonomy of rangeland plants and their application in range management and vegetation science, including the role of nonvascular plants in management of arid and semi-arid rangelands.
Journal ArticleDOI
Sprouting success of shrubs after fire: height-dependent relationships for different strategies
TL;DR: It is proposed that differences between individual shrubs in supply of nutrients, carbohydrates, and/or water to activated meristems would account for patterns of in ter- and intra-specific sprouting success.
Journal ArticleDOI
Physical dormancy in seeds of Dodonaea viscosa (Sapindales, Sapindaceae) from Hawaii
TL;DR: It is suggested that boiling opened the ‘water gap’ in the seed coat and that water entered the seed only through this small opening, thereby accounting for the slow rate of imbibition and subsequent germination of D. viscosa seeds.
Journal ArticleDOI
The effects of fire on the soil in a degraded semiarid woodland .I. Cryptogam cover and physical and micromorphological properties
TL;DR: In this article, the effects of fire on the cryptogam cover and physical and micromorphological properties of a massive red earth soil were studied in a semi-arid eucalypt woodland, heavily invaded by shrubs, near Coolabah, N.S.
Journal ArticleDOI
Simulated long‐term vegetation response to grazing heterogeneity in semi‐arid rangelands
TL;DR: It is concluded that knowledge of local grazing heterogeneity is crucial for correct assessment of livestock impact on vegetation dynamics, and management aiming at sustainable land use should account for spatial grazing aspects.
References
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Journal ArticleDOI
Heat transfer through bark, and the resistance of trees to fire.
TL;DR: A simple mathematical model is used to calculate heat transfer in bark, and the results obtained agree well with experimental measurements made on a variety of trees.
Journal ArticleDOI
The role of bark type in relative tolerance to fire of three central Victorian Eucalypts
TL;DR: It is suggested that the fire tolerance of a species should be evaluated against fuel accumulation and the fire intensity of the site, as well as the extent of damage to various parts of the tree and the ability of these parts to recover.
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