Woodlands along streams and rivers are an important part of California’s diverse ecology. They are biodiversity hotspots, providing various ecosystem services including carbon sequestration and critical habitat for threatened and endangered species. But our land and water use have significantly impacted these ecosystems, sometimes in unexpected ways.

A team of researchers, including two at UC Santa Barbara, discovered that some riparian woodlands are benefitting from water that humans divert for our own needs. Although it seems like a boon to these ecosystems, the artificial supply of water begets an unintended dependence on this bounty, threatening the long-term survival of natural forest communities. The paper, published in the Proceedings of the National Academy of Sciences(link is external), spotlights the need for changes in the way water is managed across the state.