Regional ecosystem mapping is one of the first tasks in any Queensland ecological assessment. Before you can determine what threatened species or communities might be affected by a project, you need to know what vegetation types exist on the ground — and how much of those communities has survived clearing since European settlement.
Queensland's regional ecosystem (RE) framework is the primary tool for this. It classifies every mapped vegetation community in the state by its bioregion, landform, and floristic composition, assigns it a conservation status, and provides the regulatory trigger for protection under the Vegetation Management Act 1999 and Nature Conservation Act 1992. For projects that also trigger federal assessment, RE status feeds directly into Threatened Ecological Community (TEC) identification under the EPBC Act.
This guide explains what regional ecosystems are, how the mapping system works, what the status categories mean for your project, and how Groundtruth automates the RE identification step for any Queensland site.
What Are Regional Ecosystems and Why Do They Matter?
A regional ecosystem is a vegetation community in Queensland that has consistent structure, species composition, and ecology within a particular bioregion. Each RE is defined by the combination of geology, landform, and soil on which it occurs, and described by its characteristic plant species assemblage.
REs matter for ecological assessments for three reasons:
- Regulatory triggers — Remnant vegetation in Endangered or Of Concern REs is "protected vegetation" under the Vegetation Management Act. Clearing it requires a statutory exemption or approval, with significant penalties for non-compliance.
- TEC linkage — Many Queensland REs correspond to listed Threatened Ecological Communities under the EPBC Act. Where a listed TEC is present, federal assessment may be triggered in addition to state obligations.
- MSES classification — Under Queensland's planning framework, protected areas of regional ecosystem correspond to Matters of State Environmental Significance (MSES). Projects assessed under the Planning Act 2016 must demonstrate the assessment has addressed all identified MSES.
RE codes follow a three-part format: bioregion number + landform descriptor + community number. For example, RE 12.3.2 refers to a specific community in Bioregion 12 (Southeast Queensland), with the second and third elements describing the landform position and floristic type. Queensland has mapped more than 1,400 regional ecosystem types across 13 bioregions.
How RE Mapping Works
Queensland's RE mapping is maintained by the Queensland Herbarium within the Department of Environment and Science. It is built on a combination of historical aerial photography interpretation, satellite imagery analysis, and systematic ground-truthing surveys dating back to the 1990s. The mapping is updated periodically through statewide remapping projects and post-clearing verification.
The preclear RE map
The starting point for any RE assessment is the preclear RE map — a reconstruction of Queensland's pre-European vegetation cover. It shows where each RE type would have occurred across the state before large-scale clearing began in the 1800s. The preclear extent is the denominator used to calculate how much of each RE remains — and therefore what conservation status it holds today.
Preclear maps are available through the Queensland Government's online mapping system and can be queried spatially by site coordinates or polygon boundary.
The current RE map
The current (extant) RE map shows what vegetation communities still exist on the ground. Cross-referencing the preclear and current maps reveals the extent of clearing for each RE type — the primary input for calculating conservation status.
The REDD database
The Regional Ecosystem Description Database (REDD) is maintained by the Queensland Herbarium and is the authoritative source for scientific descriptions of all mapped REs. For each RE code, REDD provides:
In practice, REDD descriptions are used to verify the RE mapping — particularly where mapping may be outdated or where complex mosaics of REs occur. A skilled ecologist can use the characteristic species lists and structural criteria to confirm or adjust the mapped RE type during fieldwork.
RE Status Categories and Regulatory Implications
Queensland assigns each regional ecosystem one of three conservation status categories under the Vegetation Management (Regulated Vegetation) Management Plan. Status is determined by the proportion of pre-clearing extent that remains as remnant vegetation.
Less than 10% of pre-clearing extent remains
Or predicted to fall below 10% within 50 years at current clearing rates. Remnant Endangered RE cannot be cleared without a specific statutory exemption. Corresponds to EPBC Act TEC listings in many cases.
10–30% of pre-clearing extent remains
Remnant Of Concern RE is protected vegetation. Clearing requires a vegetation management plan and may require a development permit. Assessed as MSES under the Planning Act.
More than 30% of pre-clearing extent remains
Remnant Least Concern RE may still have management requirements under local planning instruments. Does not trigger Vegetation Management Act protections but may require assessment under other triggers.
Regulatory implications by status
The practical consequences of RE status for a development project are significant and depend on whether the vegetation is classified as remnant:
- Endangered RE (remnant) — Cannot be cleared under most circumstances. Exemptions are narrow and prescriptive (e.g., necessary for essential management, high-value agriculture on freehold land in certain circumstances). Any assessment package must explicitly address the presence of Endangered RE.
- Of Concern RE (remnant) — Protected vegetation. Clearing requires a vegetation management plan approved by the Department of Resources. For assessable development, MSES assessment is required.
- Least Concern RE (remnant) — Protection depends on tenure and local planning scheme. Vegetation Management Act protections generally do not apply, but local laws or koala habitat mapping may still impose constraints.
- Non-remnant vegetation — Regrowth in certain categories (high-value regrowth) retains some protection. Regrowth on freehold land has different rules from leasehold. Mapping must identify regrowth age and category.
How Groundtruth Automates RE Identification and Mapping
The traditional RE mapping process involves manually accessing Queensland's Vegetation Management online portal, downloading RE layers for the site boundary, cross-referencing RE codes with REDD conservation status, checking TEC correspondence tables, and compiling the results into an assessment. For a site with multiple RE types, this can take the better part of a day.
Groundtruth automates this entire workflow. When you enter site coordinates or upload a polygon boundary, the platform:
- Queries Queensland's RE mapping layers — both preclear and current extent — for the site boundary and a configurable buffer
- Identifies all RE codes present and retrieves their REDD conservation status (Endangered, Of Concern, Least Concern)
- Checks TEC correspondence — flags any REs with a matching EPBC Act Threatened Ecological Community listing
- Classifies remnant vs non-remnant vegetation for each RE type within the site
- Generates constraint maps — spatial overlays showing the distribution of protected RE categories within and adjacent to the project footprint
- Produces the RE section of the assessment report — including RE tables, status descriptions, regulatory obligations, and survey recommendations
The output integrates with the broader Groundtruth assessment report — alongside PMST results, ALA species occurrence records, and state-listed fauna queries — so the complete desktop assessment, including RE mapping, is delivered as a single structured document.
This matters most for multi-site assessments. If you're screening 15 candidate sites for a solar farm or a pipeline corridor, running RE mapping manually for each site isn't practical inside a reasonable project timeline. Groundtruth processes each site in parallel and returns a comparative summary of RE constraints across the portfolio.
Manual RE Mapping vs Groundtruth
Here's how the manual and automated approaches compare across the key dimensions of an RE mapping exercise:
| Manual Process | Groundtruth | |
|---|---|---|
| Time per site | 4–8 hours (data access, mapping, report writing) | Under 10 minutes |
| Typical cost | $600 – $2,000 per site (consultant time) | From $69 per site |
| Data sources queried | Varies by consultant — RE mapping + REDD standard, TEC crosscheck often manual | RE mapping, REDD status, TEC correspondence, ALA, PMST — all simultaneously |
| Constraint maps | GIS skills required; variable quality | Generated automatically with site overlay |
| Multi-site comparison | Sequential — each site a separate engagement | Parallel processing; portfolio summary output |
| Ecologist sign-off | Completed report signed by registered ecologist | Draft output requires ecologist review for formal submission |
For most ecological consultancies, Groundtruth replaces the database-access and report-drafting portion of the RE mapping task — not the ecologist's professional interpretation. The ecologist focuses on reviewing the outputs, adding site-specific observations from reconnaissance, and confirming RE identifications where mapping accuracy is uncertain.
Frequently Asked Questions
What is a regional ecosystem in Queensland?
A regional ecosystem (RE) is a vegetation community in Queensland with consistent structure, composition, and ecology that is associated with a particular combination of geology, landform, and soil. REs are the primary unit of vegetation classification under the Vegetation Management Act 1999 and Nature Conservation Act 1992. Queensland has mapped more than 1,400 RE types across 13 bioregions.
What is the REDD database?
The Regional Ecosystem Description Database (REDD) is maintained by the Queensland Herbarium and contains scientific descriptions, characteristic species, structural formation, landscape context, and conservation status for all mapped regional ecosystems in Queensland. REDD is the authoritative reference for RE identification and status in ecological assessments. Conservation status in REDD is updated periodically as new mapping and survey data become available.
What does Endangered regional ecosystem status mean?
An Endangered RE has been reduced to less than 10% of its pre-clearing extent, or is predicted to fall below 10% within 50 years at current clearing rates. Remnant Endangered RE is protected vegetation under the Vegetation Management Act — it cannot be cleared without a narrow statutory exemption. Where an Endangered RE also corresponds to an EPBC Act Threatened Ecological Community, federal assessment obligations apply in addition to state requirements.
How do I identify regional ecosystems at a QLD project site?
RE identification involves overlaying site boundaries with Queensland Government preclear and current RE mapping layers, cross-referencing identified RE codes with REDD for conservation status, and checking TEC correspondence tables for EPBC Act implications. Automated tools like Groundtruth perform this spatial overlay and regulatory cross-check in under 10 minutes, producing RE tables, constraint maps, and regulatory flags as part of a complete desktop assessment report.
Map regional ecosystems for any QLD site in minutes
Enter your site coordinates. Groundtruth queries Queensland RE mapping layers, REDD status, and TEC correspondence — and delivers a complete constraint report including species tables and overlay maps.