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Hobart, Australia

Forestry Tasmania is a forest management corporation established by an Act of Parliament and wholly owned by the Government of Tasmania, Australia.Under the State of Tasmania's Forestry Act 1920, Forestry Tasmania is mandated to manage 1.5 million hectares of state forest as multiple use forest. Sustainable yield logging is currently permitted in approximately one-half of this area. The remainder is reserved and managed for other values such as conservation and recreation.Forestry Tasmania is certified under the Australian Forestry Standard, which is endorsed by the Programme for the Endorsement of Forest Certification.Forestry Tasmania's operations are overseen by a Board of Management, which is responsible to the Tasmanian Minister for Forests and Treasurer. Wikipedia.

Plantations of Eucalyptus globulus and E. nitens have been developed on Tasmanian State forest, with their combined area currently totalling 50,246 ha. The climatic envelope for this plantation estate was described by spatial interpolation of long-term climatic averages from an array of weather stations, using as parameters the mean minimum temperature of the coolest month, and effective rainfall (rainfall minus evaporation). Reanalysis of existing trial data suggested that growth reduction in E. globulus would begin to occur on sites with a mean minimum temperature of the coolest month below 1.8°C, and this threshold was thus chosen to segregate warmer areas of Tasmania suitable for planting either E. globulus or E. nitens, from cooler areas suitable only for planting E. nitens. This segregation based on temperature predicts that 53% by area of the current E. nitens and E. globulus plantation estate on State forest (26,607 ha) is suitable to plant either E. globulus or E. nitens. However, only 29% of this area is currently planted to E. globulus, a proportion which could potentially be increased to take advantage of the superior wood properties of E. globulus. There was strong overall agreement between segregation based on the 1.8°C temperature threshold, and segregation based on the previous altitudinal cut-off for E. globulus of 350 m, with 87% of the State forest eucalypt plantation estate being classified similarly under both systems. However, there were significant differences among State forest Districts in the relationship between the mean minimum temperature of the coolest month and altitude. The altitude corresponding to the 1.8°C temperature threshold was substantially below 350 metres in Districts at a more southerly latitude or with plantations situated at greater distances from the coast. Two-thirds of the disparity between the temperature and altitudinal segregation (4,204 ha) was due to sites colder than the 1.8°C temperature threshold occurring at altitudes below 350 m. Currently 49% of this plantation area is under E. globulus, although the sites could be more suitable for E. nitens. Source

Williams K.,University of Melbourne | Williams K.,Forestry Tasmania
Landscape and Urban Planning | Year: 2011

This paper reports research undertaken to examine the relative public acceptance of rural land uses in two regions of southern Australia. Participants from Tasmania and southwest Western Australia completed a questionnaire about their views on the acceptability of ten traditional and nontraditional land uses in rural areas (n= 2167). Participants made clear evaluative distinctions between traditional agricultural land uses (cropping, grazing, horticulture, dairy), non-traditional 'green' land uses (wind farms and revegetation), plantations and rural residential development. Analysis of distribution of views suggested strong positive consensus regarding traditional agricultural and nontraditional 'green' land uses, but diverse and sometimes conflicting views regarding plantations and rural residential development. The findings clarify the relative public acceptance of land uses - both controversial and non-controversial - within the study areas, and suggest land use policies that distinguish between traditional agricultural land uses and non-traditional land uses are consistent with public perceptions. The findings also demonstrate that non-traditional land uses may be more acceptable in some regions and among some social groups than others, highlighting the significance of enabling local land use planning priorities. © 2011 Elsevier B.V. Source

Jaskierniak D.,University of Tasmania | Lane P.N.J.,University of Melbourne | Lane P.N.J.,Forestry Tasmania | Robinson A.,University of Melbourne | Lucieer A.,University of Tasmania
Remote Sensing of Environment | Year: 2011

Discrete Light Detection and Ranging (LiDAR) data is used to stratify a multilayered eucalyptus forest and characterise the structure of the vertical profile. We present a methodology that may prove useful for a very broad range of forest management applications, particularly for timber inventory evaluation and forest growth modelling. In this study, we use LiDAR data to stratify a multilayered eucalyptus forest and characterise the structure of specific vegetation layers for forest hydrology research, as vegetation dynamics influence a catchment's streamflow yield. A forest stand's crown height, density, depth, and closure, influence aerodynamic properties of the forest structure and the amount of transpiring leaf area, which in turn determine evapotranspiration rates. We present a methodology that produces canopy profile indices of understorey and overstorey vegetation using mixture models with a wide range of theoretical distribution functions. Mixture models provide a mechanism to summarise complex canopy attributes into a short list of parameters that can be empirically analysed against stand characteristics. Few studies have explored theoretical distribution functions to represent the vertical profile of vegetation structure in LiDAR data. All prior studies have focused on a Weibull distribution function, which is unimodal. In a complex native forest ecosystem, the form of the distribution of LiDAR points may be highly variable between forest types and age classes. We compared 44 probability distributions within a two component mixture model to determine the most suitable bimodal distributions for representing LiDAR density estimates of Mountain Ash forests in south-eastern Australia. An elimination procedure identified eleven candidate distributions for representing the eucalyptus component of the mixture model. We demonstrate the methodology on a sample of plots to predict overstorey stand volumes and basal area, and understorey basal area of 18-, 37-, and 70-year old Mountain Ash forest with variable density classes. The 70-year old forest has been subjected to a range of treatments including: thinning of the eucalyptus layer with two distinct retention rates, removal of the understorey, and clear felling of patches that have 37year old regenerating forest. We demonstrate that the methodology has clear potential, as observed versus predicted values of eucalyptus basal area and stand volume were highly correlated, with bootstrap based r 2 ranging from 0.61 to 0.89 and 0.67 to 0.88 respectively. Non-eucalyptus basal area r 2 ranged from 0.5 to 0.91. © 2010 Elsevier Inc. Source

Moroni M.T.,Forestry Tasmania
Forest Ecology and Management | Year: 2012

In Australia, a pervasive response to increasing atmospheric greenhouse gasses and the exchange of these gasses between the atmosphere and forests has been to focus on storing carbon (C) in forested landscapes. However, the amount of C stored and able to be stored in the landscape, which is often called carbon carrying capacity, is commonly over-estimated and over-emphasised. This occurs, in part, due to a focus on the continent's most C-rich forests when discussing landscape C storage or carbon carrying capacity, and by failing to account for wildfires that will prevent all forests from becoming old and C-rich. These effects on forest age-class structure and thus C-stocks, in the Australian landscape currently tend to be overlooked at the policy level. Underemphasised is the widely recognised role of wood products in greenhouse gas mitigation, both as a C-stock and by providing society with low emission products. Improving atmospheric outcomes will only be achieved if variation in landscape C stocks is accurately described and the full role of forests in greenhouse gas mitigation including the role of wood products is explored and reflected in policy. © 2012 Elsevier B.V. Source

Moroni M.T.,Forestry Tasmania
Australian Forestry | Year: 2013

The exchange of carbon, primarily as the greenhouse gas carbon dioxide, between forests and the atmosphere, gives forest managers opportunities to limit greenhouse gas emissions through forest management. Options available to forest managers to reduce greenhouse gas emissions include 1) storing carbon in landscapes, 2) storing carbon in wood products, and 3) providing society with a low-emissions resource (wood products) to substitute for alternative materials associated with larger emissions. To evaluate the trade-off between storing carbon in forests and providing society with wood products, the dynamics of each option must be understood. Here, the above options are explained using simple models analogous to reservoirs and safes. Reservoirs are used to represent dynamic systems, such as forest and wood product carbon stocks, and the irreversible substitution effect, where emissions are avoided through the use of wood, is shown as analogous to placing avoided emissions in a safe. © 2013 Institute of Foresters of Australia (IFA). Source

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