Paired Eucalyptus forest catchment study of prescribed fire effects on suspended sediment and nutrient exports in south-eastern Australia

2010 ◽  
Vol 19 (5) ◽  
pp. 624 ◽  
Author(s):  
Hugh G. Smith ◽  
Gary J. Sheridan ◽  
Patrick N. J. Lane ◽  
Christopher B. Sherwin
Keyword(s):  
Suspended Sediment ◽  
Prescribed Fire ◽  
Stream Water ◽  
Fire Effects ◽  
South Eastern ◽  
Eucalyptus Forest ◽  
Eastern Australia ◽  
Significant Difference ◽  
Average Rainfall ◽  
South Eastern Australia

The effect of prescribed fire on suspended sediment and nutrient exports was investigated in two small Eucalyptus forest catchments in south-eastern Australia. In 2005, a patchy, mostly low-severity prescribed fire was applied to both catchments, followed in 2006 by a second burn applied to riparian areas of one catchment, with the other catchment utilised as a control for this burn. Historic pre-fire weekly stream water sampling was combined with post-fire weekly and storm-based sampling to quantify the effect of the fires. The 2005 fire resulted in a significant difference (P = 0.000) in suspended sediment concentrations compared to pre-fire data and generated peak study period suspended sediment (11.5 kg ha–1 year–1) and total phosphorous (0.016 kg ha–1 year–1) exports under near-average rainfall. However, peak suspended sediment exports only slightly exceeded the average annual load from a nearby undisturbed catchment. Well-below-average rainfall in 2006 resulted in lower exports after this burn compared with the 2005 fire. The results highlighted the importance of hydrological conditions for suspended sediment and nutrient exports within the first 12–18 months after prescribed fires, beyond which generally rapid surface vegetation recovery is likely to mitigate any burns effects.

scholarly journals Human impacts on suspended sediment and turbidity in the River Murray, South Eastern Australia: Multiple lines of evidence

2020 ◽  
Vol 36 (4) ◽  
pp. 522-541 ◽  
Author(s):  
Ian D. Rutherfurd ◽  
Christine Kenyon ◽  
Martin Thoms ◽  
James Grove ◽  
Jodie Turnbull ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
Human Impacts ◽  
South Eastern ◽  
Eastern Australia ◽  
Lines Of Evidence ◽  
South Eastern Australia

scholarly journals Biogeographical variation in the potential effectiveness of prescribed fire in south-eastern Australia

2015 ◽  
Vol 42 (11) ◽  
pp. 2234-2245 ◽  
Author(s):  
Owen F. Price ◽  
Trent D. Penman ◽  
Ross A. Bradstock ◽  
Matthias M. Boer ◽  
Hamish Clarke
Keyword(s):  
Prescribed Fire ◽  
Potential Effectiveness ◽  
South Eastern ◽  
Eastern Australia ◽  
Biogeographical Variation ◽  
South Eastern Australia

Altitudinal Variation in the Photosynthetic Characteristics of Snow Gum, Eucalyptus pauciflora Sieb. Ex Spreng. I. Seasonal Changes Under Field Conditions in the Snowy Mountains Area of South-Eastern Australia

1977 ◽  
Vol 25 (1) ◽  
pp. 1 ◽  
Author(s):  
RO Slayter ◽  
PA Morrow
Keyword(s):  
Seasonal Changes ◽  
Photosynthetic Apparatus ◽  
Photosynthetic Characteristics ◽  
Maximum Temperature ◽  
Seasonal Temperature ◽  
South Eastern ◽  
Eastern Australia ◽  
Significant Difference ◽  
South Eastern Australia

A field study of seasonal changes in the photosynthetic characteristics of three altitudinal populations of the snow gum (Eucalyptus pauciflora Sieb. ex. Spreng) was conducted at elevations of 915, 1215 and 1645 m in the Snowy Mountains area of south-eastern Australia. At optimal temperatures in midsummer, peak rates of photosynthesis under CO2-saturating conditions (Psub) reached levels of 125-135 ng cm-2 sec-1, and under ambient CO2 conditions (Pamb) reached levels of 45-55 ng cm-2 sec-1. Corresponding values of the intracellular resistance to CO2 transfer (ri) were 5-6 sec cm-1, and of the gas phase resistance to water-vapour transfer (r,) 1.2-2 sec cm-1. Measured at temperatures of 15, 20 and 25°C, the peak seasonal values of Pmax showed no significant difference between sites, but at 5° and 10° peak values were highest at the highest elevation (coldest site), and at 30° and 35° peak values were highest at the lowest elevation (warmest site). Generally similar patterns applied to Paamb. These features are consistent with the view that E. Pauciflora shows continuous variation in many physiological characteristics over its altitudinal range. At each site the temperature optimum for photosynthesis changed markedly during the season, and was closely correlated both with the long-term maximum air temperature and with the mean maximum temperature of the 10 days prior to the date of measurement. This appeared to reflect long-term adaptation of the photosynthetic apparatus of each population to the general temperature conditions at each site, combined with a short-term acclimation to the prevailing seasonal temperature regime.

scholarly journals Aves, Tumut, New South Wales, South-eastern Australia

Check List ◽  
2007 ◽  
Vol 3 (3) ◽  
pp. 168
Author(s):  
David B. Lindenmayer ◽  
Ross B. Cunningham ◽  
Chris MacGregor ◽  
Rebecca Montague-Drake ◽  
Mason Crane ◽  
...  
Keyword(s):  
New South ◽  
New South Wales ◽  
Radiata Pine ◽  
Pine Plantation ◽  
Study Region ◽  
South Eastern ◽  
Eucalyptus Forest ◽  
South Wales ◽  
Eastern Australia ◽  
South Eastern Australia

A large-scale, long-term study of the impacts on vertebrates of landscape change and habitat fragmentation is taking place at Tumut in southern New South Wales, south-eastern Australia. Field surveys focus on counting birds within three broad kinds of sites in the study region. These are: (1) A randomized and replicated set of 85 sites in remnants or fragments of native Eucalyptus forest located within the boundaries of the Radiata Pine plantation. (2) Sites dominated by Radiata Pine plantation trees (N = 40 sites). (3) Sites in the large areas of continuous Eucalyptus forest adjacent to the plantation that act as “controls” (N = 40 sites). We list of birds recorded during 1996 and 1997. A total of 92 species from 34 families was recorded. The list will be useful for workers examining bird responses to fragmented landscapes as well as those interested in the biodiversity values of plantation landscapes.

Growth rates of juvenile southern rock lobster (Jasus edwardsii) estimated through a diver-based tag - recapture program

2012 ◽  
Vol 63 (2) ◽  
pp. 110 ◽  
Author(s):  
Adrian Linnane ◽  
David Hobday ◽  
Stewart Frusher ◽  
Caleb Gardner
Keyword(s):  
Growth Rates ◽  
South Australia ◽  
Individual Growth ◽  
Rock Lobster ◽  
South Eastern ◽  
Growth Increments ◽  
Eastern Australia ◽  
Significant Difference ◽  
Jasus Edwardsii ◽  
South Eastern Australia

Despite being one of the most economically important fisheries in south-eastern Australia, growth rates of juvenile southern rock lobster (Jasus edwardsii) have not previously been quantified in the wild. This study utilised a diver-based tag–recapture program to estimate growth rates of individuals between 40–80 mm carapace length (CL) in temperate reef sites across south-eastern Australia. Of the 7064 lobsters tagged and released, 978 (14%) were recaptured with recapture rates of 23, 5 and 7% in the States of Tasmania, South Australia and Victoria respectively. Although individual growth increments were similar between the sexes, differences in annual growth rates were evident at 50 mm CL, with males growing ~1.4 times faster than females. Increased levels of growth in males resulted from a higher moult frequency, which was found to significantly reduce in females as they reached sexual maturity at ~70–80 mm CL. No significant difference was found in growth rates of males or females between the States when all sites within each State were combined. The growth estimates from this work contribute to the understanding of juvenile lobster population dynamics and will improve current fishery models by confirming relationships between early juvenile, pre-recruit abundance and entry to the fishable biomass.

Sign in / Sign up

Export Citation Format

Share Document