Soil Temperatures During Experimental Bushfires in Relation to Fire Intensity: Consequences for Legume Germination and Fire Management in South-Eastern Australia

1995 ◽  
Vol 32 (1) ◽  
pp. 76 ◽  
Author(s):  
R. A. Bradstock ◽  
T. D. Auld
Keyword(s):  
Fire Management ◽  
Fire Intensity ◽  
South Eastern ◽  
Eastern Australia ◽  
Soil Temperatures ◽  
South Eastern Australia

Experimental Embryonation and Survival of Eggs of Capillaria-Hepatica (Nematoda) Under Mouse Burrow Conditions in Cereal-Growing Soils

1987 ◽  
Vol 35 (4) ◽  
pp. 337 ◽  
Author(s):  
DM Spratt ◽  
GR Singleton
Keyword(s):  
Soil Moisture ◽  
Moisture Content ◽  
Soil Moisture Content ◽  
High Rate ◽  
Capillaria Hepatica ◽  
South Eastern ◽  
Eastern Australia ◽  
Soil Temperatures ◽  
Main Period ◽  
South Eastern Australia

The apparent absence of the nematode Capillaria hepatica in mice from regions of south-eastern Australia where plagues occur may be due to constraints on embryonation and survival of eggs in the mouse burrow, where C. hepatica is thought to be transmitted. Excavation of mouse burrows in the mallee wheatlands indicated that nest chambers generally were at depths of 200-400 mm. At these depths minimum and maximum weekly soil temperatures during the main period of mouse breeding ranged from 15 to 36.5�C and soil moisture contents were 14.5-32.8%. Embryonation and survival of C. hepatica eggs were assessed in the laboratory in three types of soil over these ranges of soil temperature and soil moisture content, emulating conditions of the mouse burrow. Two of the soil types, Walpeup sandy loan and Deniliquin riverine clay, are representative of the light and heavy soils, respectively, where mouse plagues occur in south-eastern Australia. The third type of soil was a potting mixture previously used experimentally and known to support a high rate of transmission of C. hepatica. Eggs were able to embryonate, and embryonated eggs to survive for 30 days, in each type of soil across the ranges of temperature and moisture content. The results further support the potential of C. hepatica to be used tactically in suppressing mouse numbers in the cereal-growing regions of south-eastern Australia.

Seasonal soil temperature regimes in south-eastern Australia

Soil Research ◽  
1980 ◽  
Vol 18 (3) ◽  
pp. 325 ◽  
Author(s):  
CL Watson
Keyword(s):  
Soil Temperature ◽  
Soil Taxonomy ◽  
South Eastern ◽  
Air Temperatures ◽  
South Wales ◽  
Temperature Regimes ◽  
Eastern Australia ◽  
Soil Temperatures ◽  
Western Victoria ◽  
South Eastern Australia

The soil temperature regimes of 15 locations in south-eastern Australia were categorized by using criteria adopted by the US. Soil Taxonomy. On the basis of mean annual and seasonal soil temperatures from depths of 50-61 cm, all sites but one were classed as thermic, having mean annual soil temperatures between 15� and 22�C and seasonal differences of more than 5�C. Mean annual and seasonal soil temperatures were significantly correlated with the corresponding mean air temperatures. Estimates of soil temperature regimes at other similar locations in the region may therefore be made, provided the appropriate air temperature data are available. It appears that the thermic category will not apply to certain areas of southern Victoria or to the high altitude areas of the Great Dividing Range, that extend from western Victoria through to northern New South Wales.

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