Biological invasions negatively impact global protected areas

Area of Science:

• Ecology
• Conservation Biology
• Environmental Science

Background:

• Protected areas are crucial for global biodiversity conservation and sustainability.
• Biological invasions pose a significant and growing threat to the ecological integrity and conservation value of these areas.
• Limited data on the impacts of invasive species hinders effective management decisions within protected areas.

Purpose of the Study:

• To conduct the first quantitative analysis of the global impacts of biological invasions within protected areas.
• To assess the effects of invasive species on biotic and abiotic characteristics across different scales (population, community, ecosystem).
• To evaluate the sufficiency of current management efforts in mitigating invasion impacts.

Main Methods:

• Collated data on 300 reported effects from 44 invasive species impacting protected areas worldwide.
• Analyzed impacts across population, community, and ecosystem levels.
• Examined geographical distribution of studies, noting a focus on National Parks and World Heritage Sites in the Nearctic and Neotropical regions.

Main Results:

• Biological invasions have predominantly negative impacts on both biotic and abiotic features of protected areas globally.
• These negative impacts are widespread across all ecological scales and affect the majority of studied invasive taxa.
• Despite context-dependencies, the pervasive negative effects highlight insufficient current management strategies.

Conclusions:

• Existing conservation efforts are inadequate to control invasive species and achieve biodiversity and sustainability targets.
• Prioritizing research on ecological interactions, establishing robust monitoring and prevention programs, and increasing global awareness are essential.
• Addressing the risks posed by biological invasions is imperative for the long-term success of protected areas.