What Is an EPBC Act Desktop Assessment?

Before a single boot touches the ground, most development and infrastructure projects in Australia require a desktop ecological assessment. It's the first step in understanding whether a proposed action might affect threatened species, critical habitat, or listed ecological communities protected under the Environment Protection and Biodiversity Conservation Act 1999 (EPBC Act).

The term "desktop" refers to the method: rather than conducting physical field surveys, ecologists query published government databases and scientific records from their desk. The output is a written report summarising which protected matters are likely — or reasonably possible — to occur at the site, and what that means for the project's regulatory obligations.

This guide explains exactly what a desktop ecological assessment covers, when you need one, which databases are queried, how long it takes, and how the traditional manual process compares to modern automated tools.

What a Desktop Ecological Assessment Covers

A thorough EPBC Act desktop assessment examines matters of national environmental significance (MNES) — the categories of biodiversity and heritage that the EPBC Act is designed to protect. These include:

• Threatened species — Flora and fauna listed as Critically Endangered, Endangered, or Vulnerable under the EPBC Act
• Threatened ecological communities (TECs) — Ecosystems listed as Critically Endangered or Endangered due to habitat loss, fragmentation, or degradation
• Migratory species — Birds, marine species, and cetaceans protected under international agreements
• Wetlands of international importance — Ramsar-listed wetlands within or adjacent to the project footprint
• World Heritage areas and National Heritage places — Listed places with outstanding natural or cultural values
• Commonwealth marine areas — Relevant for offshore projects

Beyond federal obligations, most desktop assessments also review state-listed species and communities, which vary by jurisdiction. In Queensland, this means the Nature Conservation Act 1992 and Matters of State Environmental Significance (MSES). In New South Wales, the Biodiversity Conservation Act 2016. In Victoria, the Flora and Fauna Guarantee Act 1988.

The final report typically includes:

• A list of EPBC-listed and state-listed species with potential to occur at the site
• A map of the search radius overlaid with recorded species occurrences
• An assessment of habitat suitability for each listed species or community
• Conclusions on whether the proposed action is likely to trigger the EPBC Act's referral threshold
• Survey recommendations for species that require field confirmation

When Do You Need a Desktop Ecological Assessment?

The short answer: before any development or land use change that might affect native habitat. In practice, that covers a very wide range of activities.

EPBC Act triggers

Under Section 12 of the EPBC Act, any action that is likely to have a significant impact on an MNES must be referred to the Minister for the Environment. A desktop assessment is typically the first step in determining whether that threshold applies — and it protects the proponent by providing documented evidence that they considered their obligations before proceeding.

Common project types requiring a desktop assessment

• Residential and industrial subdivision in or near native vegetation
• Linear infrastructure — roads, pipelines, transmission lines, rail corridors
• Renewable energy projects — solar farms, wind farms, battery storage
• Mining and resource extraction
• Land clearing for agriculture
• Coastal and marine developments, ports, dredging
• Forestry operations in native forests
• Water extraction or diversion near listed wetlands

State planning triggers

Independent of the EPBC Act, most state planning frameworks also require ecological assessment as part of environmental impact statements (EIS), development applications (DA), or biodiversity assessments. In Queensland, the Vegetation Management Act and MSES framework impose their own thresholds. In NSW, the Biodiversity Offsets Scheme applies to clearing above certain thresholds. A desktop assessment satisfying both federal and state requirements simultaneously is standard practice.

What Data Sources Are Used?

The quality of a desktop ecological assessment depends entirely on the completeness of the databases queried. A rigorous assessment draws on at least five primary sources:

DCCEEW Protected Matters Search Tool (PMST)

The PMST is the starting point for any federal desktop assessment. Maintained by the Department of Climate Change, Energy, the Environment and Water (DCCEEW), it returns a list of MNES — threatened species, ecological communities, migratory species, and Ramsar wetlands — recorded within a nominated radius of the site coordinates. The standard search radius is 10 km for most species, with modified radii for specific taxa (e.g., 100 km for migratory birds).

The PMST is authoritative for EPBC Act referral purposes — but it only reflects recorded occurrences. Species with limited survey effort or data gaps won't appear, which is why the PMST should always be supplemented with ALA and state databases.

Atlas of Living Australia (ALA)

The ALA aggregates occurrence records from over 700 data providers — natural history museums, herbaria, government agencies, and citizen science platforms like iNaturalist. For many taxa, particularly invertebrates, plants, and fungi, ALA holds more occurrence records than any government database. It also provides specimen-level data and associated habitat notes useful for suitability assessments.

State registers and vegetation mapping

Each Australian state maintains its own biodiversity database. Queensland's WildNet holds survey records for QLD-listed species. NSW BioNet holds biodiversity survey records and BioNet Atlas records used in Biodiversity Development Assessment Reports (BDARs). Victoria's Victorian Biodiversity Atlas (VBA) holds species observations for FFGA-listed species.

Regional ecosystem mapping is particularly critical for threatened ecological community assessments. Queensland's RE mapping classifies vegetation communities and flags pre-clearing extent against current mapping — a key input for remnant vegetation assessments under the Vegetation Management Act.

How Long Does It Take?

Timeframes vary significantly depending on whether the assessment is conducted manually or using automated tools.

Traditional manual process: An experienced ecological consultant querying all relevant databases, cross-referencing species lists, interpreting habitat suitability, and writing the assessment report typically takes 5–15 business days. Turnaround depends on firm workload, the complexity of the site, and the number of databases requiring manual query. For large, complex sites with many MNES, 3+ weeks is common.

Automated desktop assessment: Tools that programmatically query the same databases and generate structured reports compress this to minutes. Groundtruth, for example, runs simultaneous PMST, ALA, and state database queries in parallel, processes the results, and produces a formatted report including species tables, constraint maps, and regulatory flags — typically in under 10 minutes.

The speed difference matters most at the planning stage, when project teams need rapid "desktop screen" results before committing to site selection or lodging planning applications.

Cost Comparison: Manual vs Automated

The cost difference between manual and automated desktop assessments is substantial. Here's how the two approaches compare across key dimensions:

	Manual (Consulting Firm)	Automated (Groundtruth)
Typical cost	$1,500 – $4,500+ per site	From $69 per site
Turnaround time	5–15 business days	Under 10 minutes
Databases queried	Varies by consultant	PMST, ALA, state registers, RE mapping — all simultaneously
Report format	PDF with variable structure	Structured report with species tables, maps, constraint flags
Best for	Complex sites, referrals, EIS	Early-stage screening, planning, multi-site portfolios
Regulatory sign-off	Signed by registered ecologist	Output requires ecologist review for formal referral

For most consultants, Groundtruth isn't a replacement for their professional judgment — it's the tool that eliminates the manual database querying stage. A desktop assessment that used to take two days of database work and report writing now takes ten minutes to generate a draft. The ecologist reviews, adds site-specific context, signs off, and delivers to the client faster and at lower cost.

For developers and planners who need rapid early-stage screening across multiple sites — say, assessing 20 candidate locations for a solar farm — automated desktop assessments make multi-site comparison practical without commissioning 20 separate consulting engagements.

What Comes After the Desktop Assessment?

A desktop assessment is rarely the end of the process. Its primary output is a list of species and communities that may be present — which then determines what targeted surveys are needed before a project can proceed.

Typical next steps:

• Targeted field surveys — Confirm or rule out presence of species flagged in the desktop review. Survey methods and timing windows are species-specific (e.g., koala surveys at specific densities, migratory shorebird surveys during migration periods).
• Significance assessment — If threatened species are confirmed present, assess whether the proposed action is likely to have a significant impact under the EPBC Act or relevant state threshold tests.
• EPBC Act referral — Where significant impact is possible, a referral to DCCEEW is required before the action can proceed. The desktop assessment and any field survey reports form part of the referral package.
• Biodiversity offsets — In most states, residual impacts on native biodiversity require offsets — like-for-like habitat protection or restoration elsewhere in the landscape.

The desktop assessment frames all of this downstream work. A thorough, complete desktop review identifies the full scope of what needs to be surveyed and assessed — saving time and cost by avoiding surprises during development approval.

Summary

An EPBC Act desktop assessment is a literature review of government biodiversity databases to identify threatened species, ecological communities, and other protected matters that may occur at a project site. It's required before almost any development that might affect native habitat in Australia.

The core databases are the DCCEEW PMST, Atlas of Living Australia, the EPBC species list, state biodiversity registers (WildNet, BioNet, VBA), and regional ecosystem mapping. Together they give a complete picture of what's known to occur within the study area.

Traditional manual assessments take 5–15 days and cost $1,500–$4,500+ per site. Automated platforms like Groundtruth deliver the same database outputs in minutes, at a fraction of the cost — making early-stage screening and multi-site portfolio assessments practical at any scale.