Ecological Fire Groups and Ecological Vegetation Divisions on public land
dataset:
EFG_EVD
This layer shows Ecological Fire Groups (EFG) and Ecological Vegetation Divisions (EVDs) on Victorian public land, as defined in Cheal (2010). EFGs are groupings of EVCs for the purpose of fire management. They are similar to EVDs, except that they enable for finer scale classification of vegetation based on fire response characteristics. It is recommended that fire ecology analyses are carried out in terms of EFGs rather than EVDs.
For a full understanding of the concepts on which this dataset is based, please see DSE Fire and adaptive management report no. 84, "Growth stages and tolerable fire intervals for Victoria's native vegetation data sets", David Cheal, 2010.
The relevant terms are explained in more detail below.
An EVC is a native vegetation classification unit that is described through a commonality of its floristic, life form, and ecological characteristics, and through an inferred fidelity to particular environmental attributes. There are approximately 600 EVCs statewide.
An EVD is a native vegetation classification unit based on grouping multiple EVC units that share similar ecological responses and relationships (including fire responses). There are 32 EVDs as of 2010.
An EFG is a native vegetation classification unit which provides for the recoding and updating of more specific fire response characteristics for EVDs. For example particular EVCs within an EVD grouping may be known to exhibit different fire response characteristics, such as minimum tolerable fire intervals (see below). There are 37 EFGs as of 2010.
Tolerable fire intervals are the minimum and maximum recommended time intervals between fire events for a particular vegetation community. The time interval is derived from the vital attributes of plant and animal species that occupy the vegetation community.
Maximum TFI describes the maximum time required between two successive fire events at a site in order that a vegetation community or its constituent species can persist in the absence of fire. Expressed in years.
A minimum TFI may be assigned for both low severity fire and high severity fire.
Minimum low severity TFI describes the minimum time required between two successive fire events at a site, the first of which is a low-severity fire with a high proportion of unburnt landscape scattered within the fire perimeter, in order that a vegetation community or its constituent species can persist and have every reasonable chance of reaching maturity and setting seed.
Minimum high severity TFI describes the minimum time interval required between two successive fire events at a site, the first of which is a high-severity fire, in order that a vegetation community or its constituent species can persist and have every reasonable chance of reaching maturity and producing propagules before the following fire event. Expressed in years.
The dataset was compiled November 2010.
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Citation proposal Citation proposal
(2020) Ecological Fire Groups and Ecological Vegetation Divisions on public land Department of Environment, Land, Water & Planning https://metashare.maps.vic.gov.au/geonetwork/srv/eng/catalog.search#/metadata/50312709-833f-5ef9-ac73-456b3d0c47ba |
- Description
- Temporal
- Spatial
- Maintenance
- Format
- Contacts
- Keywords
- Resource Constraints
- Lineage
- Metadata Constraints
- Quality
- Acquisition Info
- Raster Data Details
- Raster Type Details
- Point Cloud Data Details
- Contour Data Details
- Survey Details
Simple
Description
- Title
- Ecological Fire Groups and Ecological Vegetation Divisions on public land
- Alternate title
- EFG_EVD
- Purpose
- EFG's provide a native vegetation classification unit for carrying out fire ecology analyses for the purpose of landscape-scale and statewide bushfire management activities.
- Credit
- David Cheal Andrew Blackett
- Supplemental Information
- History: The layer has not been updated since it was initially created in 2010. Ongoing monitoring and research projects will assist with the progressive update of fire response data, and EVD/EFG classifications as new information becomes available. Relationship to other Datasets: EFG_EVD provides a spatial representation of EFG_EVD_TFI, joined to NV2005_EVCBCS via EVC and Bioregion combination. Related Documents: None
- Status
- Completed
Temporal
Spatial
- Horizontal Accuracy
- 100m
- Code
- 4283
Maintenance
- Maintenance and update frequency
- As needed
Format
- Title
- DIGITAL Oracle/SDE 4
Contacts
Point of contact
Department of Environment, Land, Water & Planning
-
Blackett Andrew Mr
(gis analyst)
Level 3, 8 Nicholson Street
East melbourne
Vic
3002
Australia
Cited responsible party
No information provided.
Cited responsible party
No information provided.
Cited responsible party
No information provided.
Cited responsible party
No information provided.
Cited responsible party
No information provided.
Keywords
- Topic category
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- Environment
- Biota
Resource Constraints
- Use limitation
- . This material may be of assistance to you but the State of Victoria does not guarantee that the publication is without flaw of any kind or is wholly appropriate for your particular purposes and therefore disclaims all liability for error, loss or damage which may arise from reliance upon it. All persons accessing this information should make appropriate enquiries to assess the currency of the data.
- Classification
- Unclassified
Lineage
- Statement
- Dataset Source: EVDs and EFGs were assigned as part of a research project undertaken in 2010. The following information is available in the relevant research report: summary description of the EVDs, and summary table of TFIs of EVD and EFG attribute fields. See DSE Fire and adaptive management report no. 84, "Growth stages and tolerable fire intervals for Victoria's native vegetation data sets", David Cheal, 2010. Dataset Originality: Derived
- Description
- Collection Method: See Cheal (2010)
- Description
- EVCs from the NV2005_EVCBCS data layer were grouped into larger EVD map units, based on similar habitat growth stage and ecological characteristics. EVCs were then attributed using an EFG attribute field that provides specific fire response information for particular subsets of EVDs.
Metadata Constraints
- Classification
- Unclassified
Quality
Attribute Quality
- Comments
- Refer to NV2005_EVCBCS for attribute accuracy associated with spatial data from which EFG_EVD was derived. Notably, EVDs consist of two or more EVCs and are therefore even more heterogeneous than EVCs. The assignment of tolerable fire intervals to EVDs (and EFG attribute fields) was based on flora records from DSE's Vital Attributes Database where they were available. Detailed research on the fire ecology of Australian native vegation communities is patchy. Therefore most TFIs were estimated using a combination of expert knowledge and modelling. The uncertainty associated with the TFIs has not been quanitified. However, the TFIs are conservative and based on a precautionary approach.
Positional Accuracy
- Comments
- Refer to NV2005_EVCBCS
Conceptual Consistency
- Comments
- Refer to NV2005_EVCBCS
Missing Data
- Comments
- Wildfires information has been collected for the East Gippsland old-growth study area. The dataset for the central highlands is essentially complete, however no new records beyond 1993 have been recorded. The datasets for the North East and Goldfileds areas are currently being compiled. Statewide Completeness Verification: Ongoing monitoring and research projects will assist with the progressive update of fire response data, and EVD/EFG classifications as new information becomes available.
Excess Data
Acquisition Info
Raster Data Details
Point Cloud Data Details
Contour Data Details
Survey Details
Overviews
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50312709-833f-5ef9-ac73-456b3d0c47ba
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Associated resources
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