Introducing ProNet: a connectivity metric for protected area networks – Conservation Corridor

The United Nations Convention on Biological Diversity’s Post-2020 Global Biodiversity Framework aims to conserve and connect 30% of land and seas by 2030 (Target 3) in response to unprecedented levels of habitat loss and fragmentation. Dozens of indicators that measure connectivity have been proposed, resulting in numerous discussions to understand which are suitable, fit-for-purpose, and could be recommended to monitor and track conservation (e.g., towards Target 3’s 30% protected and connected).

Operationalizing connectivity indicators that are simple to explain, easily communicated, and readily understood by policy and decision makers is critical to bridging the science-practice gap. Equally important is a framework to quantitatively compare the connectivity metrics used in indicator application, because it helps decision makers to select the most appropriate metric and indicator.

In our recent paper, we describe the need for, the methodological basis, and illustrative application of the new Protected Network metric (ProNet). ProNet is intended to be a simple, robust, and extendable metric developed specifically to guide high-level conservation actions and policies by tracking the performance of area-based conservation efforts with respect to the connectivity of a network of protected areas (i.e. applicable to Target 3).

We evaluated and compared ProNet to existing metrics using a library of hypothetical and real-world landscapes to provide a strong quantitative basis to compare different metrics. We also provided a 6-step connectivity framework to clarify concepts and terms commonly used when modeling or measuring connectivity.

We hope our work encourages and facilitates stronger evaluation and careful use when selecting a “best” measure of landscape connectivity.