DOI: 10.25919/hdda-nr64
title: Ecological Knowledge System: Regional Pilot State and Transition Models

description: Collection: This collection contains a suite of models and datasets for regionally specific State and Transition Models (STMs) developed during the pilot phase of the Ecological Knowledge System (EKS) project. The EKS is a partnership between CSIRO and the Department of Climate Change, Energy, the Environment and Water (DCCEEW) to establish a transparent and authoritative source of information, biodiversity assessment and forecast capability for the Nature Repair Market (the market). STMs are used in the EKS to synthesise knowledge about the dynamics, management, and restoration of ecosystems. 

The three pilot regions were the Burnett-Mary Natural Resource Management (NRM) region in southern Queensland, the North-Central Catchment Management Authority (CMA) region in Victoria, and the Brigalow north and south IBRA region in central east Queensland. STM information for the Burnett-Mary NRM are currently included in this collection. Information for the North-Central CMA and Brigalow region is being prepared for publication.

This collection comprises two types of information: (1) comprehensive summary reports for STMs developed by the Ecological Knowledge System during the pilot phase, and (2) STM data in JSON and Excel format detailing the states, transitions, and disturbances for each model. The data is the same between the two formats, but they have different purposes. The JSON format is widely used for data interchange between different systems and applications. The Excel format is more convenient for people to read and use and is made available for that reason. Supporting documentation includes a Data Dictionary which defines the different components of this collection and its characteristics.
This data collection is based on research created under the Project An Ecological Knowledge System for the Nature Repair Market scheme, which was funded by DCCEEW. The Commonwealth owns the intellectual property rights in any material developed while carring out the Project. Copyright is retained by CSIRO (2025)
To cite individual models within this collection, please use the citation specified in the applicable model summary reports.

Background: The EKS uses STMs to organise regional scale understanding of how ecosystem management, such as restoration activities, impact ecosystem condition and biodiversity. STMs are conceptual tools that describe the state of a particular ecosystem (which may vary, for example, from reference to removed, in terms of ecosystem integrity), and the drivers or agents (e.g. management actions, restoration interventions) that cause transitions between states. STMs enable distinction among states that are similar in condition (in terms of departure from reference condition) but differ in ecosystem characteristics (such as species composition, structure, and function). STMs also estimate the expected outcomes of different management interventions over specific timeframes. 
They are constructed using the following key components:
• Reference states: The dynamic state of an ecosystem that has the highest ecosystem integrity 
• Modified states: An ecosystem state that is not in reference condition due to disturbances external to the ecosystem (i.e. exogenous disturbances) such as land clearing or grazing. 
• Transitions: The pathway through which an ecosystem may pass from one state to another. Transitions can be triggered by disturbances or management interventions external to the ecosystem.

STMs can be used to identify the ecosystem state and the actions that are required to improve biodiversity by restoring ecosystem structure, function, and composition. They can also be used to predict the likely ecosystem state of an activity area after restoration activities have been completed over specific timeframes.