Nature conservation

Biodiversity Reform

The Biodiversity Assessment Method

The Biodiversity Assessment Method (BAM) is the assessment manual that outlines how an accredited person assesses impacts on biodiversity at development sites and stewardship sites. It is a scientific document that provides:

  • a consistent method for the assessment of biodiversity on a proposed development or major project, or clearing site,
  • guidance on how a proponent can avoid and minimise potential biodiversity impacts, and
  • the number and class of biodiversity credits that need to be offset to achieve a standard of ‘no net loss’ of biodiversity.

The BAM is supported by the online BAM tool, which allows accredited assessors (typically ecological consultants) to enter field data and determine the number and class of biodiversity credits. The BAM tool will also assist in the preparation of standardised reports for consent authorities to consider.

An accredited assessor must apply the BAM. The assessor documents the results of the biodiversity assessment in a Biodiversity Development Assessment Report (BDAR). The BDAR identifies how the proponent proposes to avoid and minimise impacts, any potential impact that could be characterised as serious and irreversible according to specified principles and the offset obligation required to offset the likely biodiversity impacts of the development or clearing proposal, expressed in biodiversity credits.

A proponent must provide the BDAR to the approval authority as part of their development, major project proposal, or clearing application. A BDAR will be placed on public exhibition with the relevant development application.

Read the BAM.

Biodiversity credits

The BAM measures two types of credits on both development sites and stewardship sites.

These are:

  • Ecosystem credits, which measure the offset requirement for impacts on threatened ecological communities, threatened species habitat for species that can be reliably predicted to occur with a plant community type, and other plant community types generally.
  • Species credits, which measure the offset requirement for impacts on threatened species individuals or area of habitat.
Page last updated: 30 August 2017