What is a Sentinel Site for Nature?

Sentinel Sites for Nature are strategic locations, such as preserves or sanctuaries, where scientists conduct long-term and standardized monitoring of physical and biological conditions, including climate, wildlife, and water. This monitoring helps detect and understand environmental changes, providing crucial early warnings of impacts from climate change, pollution, and habitat loss. The data gathered enables better conservation decisions.
Using consistent methods like camera monitoring, audio monitoring, meteorological, and soil sensor data, these sites track the pulse of the natural world across vast networks like California's Sentinel Site Network or NOAA's Marine Sanctuaries. These data help scientists establish baselines and track trends, supporting stewardship and public safety more effectively.
Pepperwood is part of California's Sentinel Site Network and was among the first such sites established in the state. It is also one of the most highly instrumented of such sites, with more than 700 real-time data streams. Take a tour through our extensive collection of monitoring sensors with Ryan Ferrell, Pepperwood's Sentinel Site Manager. Ryan describes how collecting abiotic data can inform our adaptive management plan, and what that process is like in his day-to-day experience.
You can read more about this, including additional projects within the Sentinel Site and links to our regional partners, in the April 2025 article What is a Sentinel Site.
This episode's Nature Sound Guess Who Game clip, recorded by Geoffrey A. Keller, was used courtesy of Cornell Lab of Ornithology | Macaulay Library.