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.
 
Citation proposal Citation proposal
(2020)

Ecological Fire Groups and Ecological Vegetation Divisions on public land

Department of Energy, Environment and Climate Action
 

Description

Title
Ecological Fire Groups and Ecological Vegetation Divisions on public land 
Alternate title
EFG_EVD 
Resource Type
Dataset  
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

Time period
2010-11-30 
 
 

Spatial

Spatial representation type
Vector  
Horizontal Accuracy
100m  
Code
4283 
Description
General - Victoria 
N
S
E
W


 

 

Maintenance

Maintenance and update frequency
As needed  
 
 

Format

Title
DIGITAL Oracle/SDE 4 
 
 

Contacts

  Point of contact

Cited responsible party  

No information provided.

Cited responsible party  

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Cited responsible party  

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Cited responsible party  

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Cited responsible party  

No information provided.
 
 

Keywords

Topic category
  • 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
 
 

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