Invasive species are a significant threat to climate-preparedness and resilience, according to a new white paper prepared for the US Department of the Interior by the Invasive Species Advisory Committee (ISAC). The paper, Invasive Species Threaten the Success of Climate Change Adaptation Efforts, addresses one of the most critical intersections between invasive species and climate change—where invasive species are posing a direct threat to natural climate solutions and climate resilience—and provides recommendations for action at the federal level.

“There are many examples—in the Pacific Islands and beyond—of how efforts to prevent and manage invasive species have resulted in more climate-resilient communities, ecosystems, and economies”, said white paper author and Pacific RISA Co-Lead Investigator Laura Brewington

Executive Order No. 14008 mandates that US federal agencies and departments develop Climate Change Adaptation Plans to enhance the nation’s resilience to climate change, but invasive species are also documented to reduce the effectiveness of climate adaptation and mitigation actions. For example, fire-tolerant invasive grasses are supercharging wildfires in many parts of the United States, including Hawaii and the US Pacific Islands, which not only threatens critical infrastructure and ecosystems, but also reduces wildland climate resilience and carbon storage capacity.  In spite of this, only eight of the 26 federal Climate Change Adaptation Plans directly reference invasive species, and just four meaningfully consider the reciprocal impact of invasive species on climate adaptation efforts.

To develop recommendations for addressing this intersection of climate and invasive species, the ISAC author team conducted a gap analysis of the US Climate Change Adaptation Plans and synthesized case studies around the impacts of invasive species on US climate resilience. The five recommendations, if implemented, would transform how invasive species are considered within federal climate change planning, programs, and policies.

“Our research confirmed what we already suspected: federal agencies have not yet actively integrated invasive species management into climate action planning, funding, and implementation—and they must take clear steps to do so in order to meet their own climate goals,” said Leigh Greenwood, TNC’s Director of Forest Pests and Pathogens programs and Chair of ISAC’s Climate Change subcommittee. “Each of the five recommendations is achievable and would help protect both people and nature from the damaging impacts of climate change.”

Download and share the full 2023 ISAC climate change white paper!

Featured image: Water hyacinth, a fast growing invasive weed that clogs waterways and flood control mechanisms in the southeastern United States. Credit: Florida Fish and Wildlife (via Flickr).