Reference state and benchmark concepts for better biodiversity conservation in contemporary ecosystems

Area of Science:

• Ecology
• Conservation Biology
• Environmental Science

Background:

• Accurate measurement of biodiversity status and trends is vital for effective conservation and management.
• Traditional reference states often rely on historical conditions, which can be difficult to quantify, falsify, or may no longer be achievable targets.
• A clear definition of reference states is essential for assessing biodiversity status and change.

Purpose of the Study:

• To develop a conceptual framework for understanding and applying reference states in biodiversity assessment.
• To introduce contemporary reference states as a novel, measurable, and falsifiable alternative to historical reference states.
• To guide policy-makers and practitioners in maximizing biodiversity conservation and restoration outcomes in existing ecosystems.

Main Methods:

• Characterization of existing historical reference states (Pre-Human, Indigenous Cultural, Pre-Intensification, Hybrid-Historical).
• Development of a conceptual framework for contemporary reference states, focusing on current ecological patterns and biodiversity values.
• Application of the contemporary reference state concept using an example from south-eastern Australia.

Main Results:

• Historical reference states present challenges in quantification and attainability.
• Contemporary reference states offer a measurable and falsifiable approach, focusing on maximizing biodiversity in current ecological conditions.
• The proposed framework accounts for diverse biodiversity values across different spatial scales and ecosystems.

Conclusions:

• The conceptual framework provides a new perspective on defining reference states for biodiversity assessment.
• Contemporary reference states are a practical tool for policy-makers and practitioners to enhance conservation and restoration efforts.
• This approach facilitates informed decision-making for managing species, habitats, and ecosystems in the face of environmental change.