LTERN Data Portal
Victorian Tall Eucalypt Forest Plot Network: Victorian Central highlands fire refuges project: Fire severity predictions and maps for the O’Shannassy and Maroonndah Water Catchments, Victoria, Australia, 2002-2009
- Citation
-
Berry, L; Stein, J (): Victorian Tall Eucalypt Forest Plot Network: Victorian Central highlands fire refuges project: Fire severity predictions and maps for the O’Shannassy and Maroonndah Water Catchments, Victoria, Australia, 2002-2009. Long Term Ecological Research Network. http://www.ltern.org.au/knb/metacat/ltern2.288.48/html
- Identifier
-
- docid
- ltern2.288.48
- Data Creators
-
- Individual
- Mr Laurence Berry
- Position
- PhD student
- Organization
- Fenner School of Environment and Society, Australian National University
- Individual
- Mr John Stein
- Position
- Senior Manager 1 (Research)
- Organization
- The Fenner School of Environment and Society
- Abstract
-
We used a case study in an Australian wet montane forest to establish how predictive fire simulation models can be interpreted as management tools to identify potential fire refuges. We tested the ability of a topographically based fire prediction model developed by Mackey et al (2002) in the O’Shannassy and Maroondah water catchments, NE north-east of Melbourne, Australia, with fire severity data collected following a large wildfire in 2009 in the same area. We derived our fire severity data from a larger map created by the Department of Sustainability and Environment (2009), using SPOT satellite imagery and the normalised-burnt ratio. We examined the relationship between the probability of fire refuge occurrence as predicted by an existing fire refuge model and fire severity experienced during a large wildfire. We also examined the extent to which local fire severity was influenced by fire severity in the surrounding landscape. We used a combination of statistical approaches including generalised linear modelling, variogram analysis and receiver operating characteristics and area under the curve analysis (ROC AUC). We found that the amount of unburnt habitat and the factors influencing the retention and location of fire refuges varied with fire conditions. Under extreme fire conditions, the distribution of fire refuges was limited to only extremely sheltered, fire-resistant regions of the landscape. During extreme fire conditions, fire severity patterns were largely determined by stochastic factors that could not be predicted by the model. When fire conditions were moderate, physical landscape properties appeared to mediate fire severity distribution. Our study demonstrates that land managers can employ predictive landscape fire models to identify the broader climatic and spatial domain within which fire refuges are likely to be present. It is essential that within these envelopes, forest is protected from logging, roads and other developments so that the ecological processes related to the establishment and subsequent use of fire refuges are maintained. Department of Sustainability and Environment (2009) Remote sensing guideline for assessing landscape-scale fire severity in Victoria’s forest estate. Unpublished technical manual., Department of Sustainability and Environment, Melbourne. Mackey, B., D. Lindenmayer, M. Gill, M. McCarthy, and J. Lindesay. 2002. Wildlife, Fire and Future Climate: A Forest Ecosystem Analysis. CSIRO publishing, Collingwood.
- Contacts for Questions on the Use and Interpretation of Data
-
- Individual
- Mr Laurence Berry
- Position
- PhD student
- Organization
- Fenner School of Environment and Society, Australian National University
- Address
-
Geography Building 48a, Linnaeus way
Fenner School of Environment and Society, Australian National University, Acton
Canberra,. ACT 0200
Australia
- Phone
-
- voice
- +61 (02) 6125 7653
- Email Address
- Laurence.berry@anu.edu.au
- Project Information and Data Owners
-
- Title
- Victoria Tall Eucalypt Forest Plot Network
- Personnel
-
- Role
- Data Owner
- Individual
- Professor David Lindenmayer
- Position
- Principal Investigator
- Organization
- Fenner School of Environment and Society, The Australian National University
- Funding
-
This project was not directly funded by any sources. Laurence Berry was supported by an ARC discovery scholarship as part of the Victorian Central Highlands (VCH) long term research project. Field observations used to cross-validate the DSE (2009) fire severity data were collected from long term monitoring sites across the VCH by project field staff. These observations were made in 2009. Since 2012 the Plot Network infrstructure has been funded as part of the Long Term Ecological Research Network (LTERN). LTERN is a Facility within the Terrestrial Ecosystem Research Network (TERN). TERN is supported by the Australian Government through the National Collaborative Research Infrastructure Strategy.
- Methods and Sampling Information
-
- Methods
-
Method Step 1
- Description
-
Assembling fire severity data
The fire severity data presented in this data package was originally created by DSE (2009) using the normalized-burn ratio from SPOT satellite data. We trimmed the DSE fire severity layer to within the extent of the O’Shannassy and Maroondah water catchments only. The file represents a raster grid with 20 x 20 m cells. Within each cell fire severity is recorded on a scale of 1-5. 1) high severity crown fire 2) crown scorch 3) moderate crown fire (canopy survives) 4) understorey burn only 5) no fire in the crown or the understorey.
- Instrument
-
- None
Method Step 2- Description
-
Assembling predicted fire severity data
We sourced data which mapped the probability of an area being retained as a fire refuge for fauna vulnerable to the effects of fire (probability of area remaining unburnt), from a study published by Mackey et al. (2002). As the original data used to create their model was unavailable, we rasterised a high quality digital image of the final published map showing the predicted distribution of areas likely to remain unburnt following a fire. This was trimmed to within the extent of the O’Shannassy and Maroondah water catchments only. The grid cells produced were 20 m x 20 m and shared identical co-ordinates with the DSE fire severity grid cells. This enabled a direct comparison to be made. The predicted severity data takes the form of a scale from 1-9, with 1 being a low probability that a location will remain unburnt and 9 being a high probability that a location will remain unburnt. Both sets of data were merged to form a large table of co-ordinates, severity values and predicted values for each catchment. To add depth to our analyses we also added environmental variables to each grid cell; topographic wetness index (twi), elevation, precipitation and aspect. To conduct analyses of spatial autocorrelation, we also included a spatially lagged response variable (SLRV) in our dataset (fm4, fm8). These were calculated in ArcMap using the focal mean tool, which produces a severity value for each cell based on the mean severity values in the surrounding 4 (rook) and 8 (queen) cells.
- Instrument
-
- None
- Sampling
-
- Study Extent Description
-
The predicted severity values were created in 2002 by Mackey et al (2002). The fire severity data were collected by DSE (2009) following the 2009 ‘Black Saturday’ bushfires in the region.
- Sampling Description
-
As the region surrounding our study area is subject to heavy logging pressure, we chose to sample the O’Shannassy and Maroondah catchments only to remove any potential influence of logging on fire severity. See Mackey, B., D. Lindenmayer, M. Gill, M. McCarthy, and J. Lindesay (2002) Wildlife, Fire and Future Climate: A Forest Ecosystem Analysis. CSIRO publishing, Collingwood. Department of Sustainability and Environment (2009) Remote sensing guideline for assessing landscape-scale fire severity in Victoria’s forest estate. Unpublished technical manual., Department of Sustainability and Environment, Melbourne.
- Associated Parties
-
- Role
- Originator
- Individual
- Professor Brendan Mackey
- Position
- Director, Griffith Climate Change Response Program
- Organization
- Griffith University
- Role
- Researcher
- Individual
- Mr John Stein
- Position
- Senior Manager 1 (Research)
- Organization
- The Fenner School of Environment and Society
- Keywords and Subject Categories
-
- LTERN Monitoring Themes
-
- Fire
- Fragmentation
- ANZSRC-FOR
-
- 0501
- 0502
- GCMD
-
- Earth Science Services > Hazards Management > Hazards Planning
- Geographic Coverage
-
- Geographic Description
- The data were collected in the O’Shannassy and Maroondah Water Catchments ~ approximately 80km NE of Melbourne in Victoria, Australia
- Bounding Coordinates
-
- West
- 145.5 degrees
- East
- 145.7311 degrees
- North
- -37.5843 degrees
- South
- -37.6579 degrees
- Temporal Coverage
-
- Date Begin
- 2002
- Date End
- 2009
- Intellectual Rights, Licence and Usage Conditions
-
TERN-BY-SA Special Condition If this data is accepted for publication, the metadata should be made live as soon as possible. However, the data should be embargoed until appropriate approval to publish has been received from whoever holds the rights to reproduce the fire severity data originally created by DSE 2009 (John Stein). Approval to reproduce the Mackey et al (2002) data can be sought from David Lindenmayer, a co-author on the original paper. These conditions must be included when licensing any derivative works.
- Data Table
-
- Name
- lvic_berry_fire_severity_maroondahcatchment_p363t617.csv
- Attribute Information
-
row
- Name
- row
- Definition
- Row location in raster grid
- Measurement Type
- ordinal
- Measurement Domain
-
- Text Domain
-
- Definition
- number
col- Name
- col
- Definition
- Column location in raster grid
- Measurement Type
- ordinal
- Measurement Domain
-
- Text Domain
-
- Definition
- number
cell- Name
- cell
- Definition
- Cell number in grid (1 is top right)
- Measurement Type
- ordinal
- Measurement Domain
-
- Text Domain
-
- Definition
- number
xcord- Name
- xcord
- Definition
- x co-ordinate AGD66. Co-oridinates for the centre of each 20 m grid cell
- Measurement Type
- interval
- Measurement Domain
-
- Standard Unit
- meter
- Number Type
- whole
ycord- Name
- ycord
- Definition
- y co-ordinate AGD66. Co-oridinates for the centre of each 20 m grid cell
- Measurement Type
- ratio
- Measurement Domain
-
- Standard Unit
- number
- Number Type
- whole
x- Name
- x
- Definition
- Latitude WGS84 decimal degrees
- Measurement Type
- interval
- Measurement Domain
-
- Standard Unit
- meter
- Number Type
- real
y- Name
- y
- Definition
- Longitude WGS84 decimal degrees
- Measurement Type
- interval
- Measurement Domain
-
- Standard Unit
- meter
- Number Type
- real
fsev- Name
- fsev
- Definition
- Fire severity meaure
- Measurement Type
- ordinal
- Measurement Domain
-
- Enumerated Domain
-
- Code Definition
-
- 1
- crown scorch
- 2
- crown burn
- 3
- moderate crown scorch
- 4
- light or no crown scorch, understorey burnt
- 5
- no crown scorch, no understorey burnt
pref- Name
- pref
- Definition
- Probability of area remaining unburnt following fire from Mackey et al (2002). These values were generated as the final product of the Mackey et al (2002) modelling process. These values represent the probability of a grid cell remaining unburnt following a fire. As these values represent a scale of probability and are not categorical we can only provide a qualitative description of the characteristics associated with values at each end of the scale. These are as follows; 1 can be interpreted as = Low percentile mean fire interval (<100 years), low probability of multi-agedness (<25%). lower mean topographic wetness index (TWI), higher elevation percentile, higher annual mean temperature. 9 can be interpreted as = 90-100% percentile mean fire interval (>500 years), high probability of multi-agedness (>65%), higher mean topographic wetness index (TWI), lower elevation percentile, lower annual mean temperature.
- Measurement Type
- ordinal
- Measurement Domain
-
- Text Domain
-
- Definition
- Character
ele- Name
- ele
- Definition
- Elevation meters (ASL). 20 m DEM, created using Vicmap 10m contours, spot heights and watercourses
- Measurement Type
- interval
- Measurement Domain
-
- Standard Unit
- meter
- Number Type
- whole
twi- Name
- twi
- Definition
- Topographic wetness index. Index of contributing catchment divided by slope at each grid cell of the 20 m DEM TWI is a continuous terrain-based measure of potential wetness that indicates position in the landscape. It ranges from negative values on hill tops and ridges (with no contributing catchment) then upper slopes (small contributing catchment/steep slope) to increasingly higher positive values through lower slopes, valley flats and eventually drainage lines.
- Measurement Type
- interval
- Measurement Domain
-
- Standard Unit
- dimensionless
- Number Type
- real
slope- Name
- slope
- Definition
- Slope based on neighbourhood geometry of the 20 m DEM.
- Measurement Type
- interval
- Measurement Domain
-
- Standard Unit
- degree
- Number Type
- real
aspe- Name
- aspe
- Definition
- East component of aspect based on sine of aspect angle (continuous value from -1 to +1) from neighbourhood geometry of the 20 m DEM
- Measurement Type
- ratio
- Measurement Domain
-
- Standard Unit
- dimensionless
- Number Type
- real
aspn- Name
- aspn
- Definition
- North component of aspect based on cosine of aspect angle (continuous value from -1 to +1) from neighbourhood geometry of the 20 m DEM
- Measurement Type
- ratio
- Measurement Domain
-
- Standard Unit
- mole
- Number Type
- real
fm4- Name
- fm4
- Definition
- Mean fire severity value of the 4 adjacent neighbourhood cells
- Measurement Type
- ordinal
- Measurement Domain
-
- Text Domain
-
- Definition
- Character
fm8- Name
- fm8
- Definition
- mean fire severity value of all 8 neighbourhood cells
- Measurement Type
- ordinal
- Measurement Domain
-
- Text Domain
-
- Definition
- Character
crownfire- Name
- crownfire
- Definition
- Fire severity re-classified into binomial measure of crownfire = 1 or other = 0
- Measurement Type
- nominal
- Measurement Domain
-
- Enumerated Domain
-
- Code Definition
-
- 0
- other - combined DSE fire severity classes 3 + 4 + 5
- 1
- crownfire - combined DSE fire severity classes 1 + 2
lowsev- Name
- lowsev
- Definition
- Fire severity re-classified into binomial measure of low severity fire = 1 or other = 0
- Measurement Type
- nominal
- Measurement Domain
-
- Enumerated Domain
-
- Code Definition
-
- 0
- other- combined DSE fire severity classes 1 + 2
- 1
- low severity fire - combined DSE fire severity classes 3 + 4 + 5
- Physical Structure Description
-
- Object Name
- lvic_berry_fire_severity_maroondahcatchment_p363t617.csv
- Text Format
-
- Number of Header Lines
- 1
- Number of Footer Lines
- 0
- Record Delimiter
- \r\n
- Attribute Orientation
- column
- Simple Delimited
-
- Field Delimiter
- ,
- Distribution
-
Online
- URL
- ltern2.289.3
- Access
-
- Access Control
-
- Auth System
- knb
- Order
- allowFirst
- Allow:
-
Permission Principal [all] cn=submitters,o=unaffiliated,dc=ecoinformatics,dc=org [read] cn=allusers,o=unaffiliated,dc=ecoinformatics,dc=org [read] cn=pn_vc_tall_eucalypt,o=unaffiliated,dc=ecoinformatics,dc=org
- Name
- lvic_berry_fire_severity_oshannassycatchment_p363t618.csv
- Attribute Information
-
row
- Name
- row
- Definition
- Row location in raster grid
- Measurement Type
- ordinal
- Measurement Domain
-
- Text Domain
-
- Definition
- number
col- Name
- col
- Definition
- Column location in raster grid
- Measurement Type
- ordinal
- Measurement Domain
-
- Text Domain
-
- Definition
- number
cell- Name
- cell
- Definition
- Cell number in grid (1 is top right)
- Measurement Type
- ordinal
- Measurement Domain
-
- Text Domain
-
- Definition
- number
xcord- Name
- xcord
- Definition
- x co-ordinate AGD66. Co-oridinates for the centre of each 20 m grid cell
- Measurement Type
- interval
- Measurement Domain
-
- Standard Unit
- meter
- Number Type
- whole
ycord- Name
- ycord
- Definition
- y co-ordinate AGD66. Co-oridinates for the centre of each 20 m grid cell
- Measurement Type
- ratio
- Measurement Domain
-
- Standard Unit
- number
- Number Type
- whole
x- Name
- x
- Definition
- Latitude WGS84 decimal degrees
- Measurement Type
- interval
- Measurement Domain
-
- Standard Unit
- meter
- Number Type
- real
y- Name
- y
- Definition
- Longitude WGS84 decimal degrees
- Measurement Type
- interval
- Measurement Domain
-
- Standard Unit
- meter
- Number Type
- real
fsev- Name
- fsev
- Definition
- Fire severity meaure
- Measurement Type
- ordinal
- Measurement Domain
-
- Enumerated Domain
-
- Code Definition
-
- 1
- crown scorch
- 2
- crown burn
- 3
- moderate crown scorch
- 4
- light or no crown scorch, understorey burnt
- 5
- no crown scorch, no understorey burnt
pref- Name
- pref
- Definition
- Probability of area remaining unburnt following fire from Mackey et al (2002). These values were generated as the final product of the Mackey et al (2002) modelling process. These values represent the probability of a grid cell remaining unburnt following a fire. As these values represent a scale of probability and are not categorical we can only provide a qualitative description of the characteristics associated with values at each end of the scale. These are as follows; 1 can be interpreted as = Low percentile mean fire interval (<100 years), low probability of multi-agedness (<25%). lower mean topographic wetness index (TWI), higher elevation percentile, higher annual mean temperature. 9 can be interpreted as = 90-100% percentile mean fire interval (>500 years), high probability of multi-agedness (>65%), higher mean topographic wetness index (TWI), lower elevation percentile, lower annual mean temperature.
- Measurement Type
- ordinal
- Measurement Domain
-
- Text Domain
-
- Definition
- Character
ele- Name
- ele
- Definition
- Elevation meters (ASL). 20 m DEM, created using Vicmap 10m contours, spot heights and watercourses
- Measurement Type
- interval
- Measurement Domain
-
- Standard Unit
- meter
- Number Type
- whole
twi- Name
- twi
- Definition
- Topographic wetness index. Index of contributing catchment divided by slope at each grid cell of the 20 m DEM TWI is a continuous terrain-based measure of potential wetness that indicates position in the landscape. It ranges from negative values on hill tops and ridges (with no contributing catchment) then upper slopes (small contributing catchment/steep slope) to increasingly higher positive values through lower slopes, valley flats and eventually drainage lines.
- Measurement Type
- interval
- Measurement Domain
-
- Standard Unit
- dimensionless
- Number Type
- real
slope- Name
- slope
- Definition
- Slope based on neighbourhood geometry of the 20 m DEM.
- Measurement Type
- interval
- Measurement Domain
-
- Standard Unit
- degree
- Number Type
- real
aspe- Name
- aspe
- Definition
- East component of aspect based on sine of aspect angle (continuous value from -1 to +1) from neighbourhood geometry of the 20 m DEM
- Measurement Type
- ratio
- Measurement Domain
-
- Standard Unit
- dimensionless
- Number Type
- real
aspn- Name
- aspn
- Definition
- North component of aspect based on cosine of aspect angle (continuous value from -1 to +1) from neighbourhood geometry of the 20 m DEM
- Measurement Type
- ratio
- Measurement Domain
-
- Standard Unit
- dimensionless
- Number Type
- real
fm4- Name
- fm4
- Definition
- Mean fire severity value of the 4 adjacent neighbourhood cells
- Measurement Type
- ordinal
- Measurement Domain
-
- Text Domain
-
- Definition
- Character
fm8- Name
- fm8
- Definition
- mean fire severity value of all 8 neighbourhood cells
- Measurement Type
- ordinal
- Measurement Domain
-
- Text Domain
-
- Definition
- Character
crownfire- Name
- crownfire
- Definition
- Fire severity re-classified into binomial measure of crownfire = 1 or other = 0
- Measurement Type
- nominal
- Measurement Domain
-
- Enumerated Domain
-
- Code Definition
-
- 0
- other - combined DSE fire severity classes 3 + 4 + 5
- 1
- crownfire - combined DSE fire severity classes 1 + 2
lowsev- Name
- lowsev
- Definition
- Fire severity re-classified into binomial measure of low severity fire = 1 or other = 0
- Measurement Type
- nominal
- Measurement Domain
-
- Enumerated Domain
-
- Code Definition
-
- 0
- other- combined DSE fire severity classes 1 + 2
- 1
- low severity fire - combined DSE fire severity classes 3 + 4 + 5
- Physical Structure Description
-
- Object Name
- lvic_berry_fire_severity_oshannassycatchment_p363t618.csv
- Text Format
-
- Number of Header Lines
- 1
- Number of Footer Lines
- 0
- Record Delimiter
- \r\n
- Attribute Orientation
- column
- Simple Delimited
-
- Field Delimiter
- ,
- Distribution
-
Online
- URL
- ltern2.290.3
- Access
-
- Access Control
-
- Auth System
- knb
- Order
- allowFirst
- Allow:
-
Permission Principal [all] cn=submitters,o=unaffiliated,dc=ecoinformatics,dc=org [read] cn=pn_vc_tall_eucalypt,o=unaffiliated,dc=ecoinformatics,dc=org [read] cn=allusers,o=unaffiliated,dc=ecoinformatics,dc=org
- Additional Metadata Links
-
additionalLinksAdditional Metadata : additionalLinks
- Metadata
-
- additionalLinks
-
- url
-
- @name
- Victorian Tall Eucalypt Forest Plot Network homepage
- Access
-
- Access Control
-
- Auth System
- knb
- Order
- allowFirst
- Allow:
-
Permission Principal [read] public [all] cn=submitters,o=unaffiliated,dc=ecoinformatics,dc=org [read] cn=pn_vc_tall_eucalypt,o=unaffiliated,dc=ecoinformatics,dc=org
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