Risks posed by invasive species to the provision of ecosystem services in Europe

Risks posed by invasive species to the provision of ecosystem services in Europe

10 April 2024 | Belinda Gallardo, Sven Bacher, Ana Marcia Barbosa, Laure Gallien, Pablo González-Moreno, Víctor Martínez-Bolea, Cascade Sorte, Giovanni Vimercati & Montserrat Vilà
Invasive species pose significant risks to ecosystem services in Europe, particularly affecting outdoor recreation, habitat maintenance, crop provision, and soil and nitrogen retention. The study assessed the current and potential future risks of 94 invasive species to seven key ecosystem services. Exposure to invasive species was higher in areas with lower ecosystem service provision, especially for regulating and cultural services. High-value ecosystem service areas, though small in Europe (0-13%), are disproportionately important for service conservation. The study highlights the need to monitor and protect these hotspots to align management strategies with international biodiversity targets. Since 1970, the capacity of nature to sustain human quality of life through biodiversity and ecosystem services has been declining. Invasive species are a major contributor to this decline. While the effects of biological invasions on native species and biodiversity are well-documented, their impacts on ecosystem services remain scattered and difficult to generalize. The study used risk assessments, species occurrence data, and ecosystem services mapping to evaluate the risks posed by invasive species at a continental scale. The study found that the current exposure of ecosystem services to invasion is more pronounced in areas with low provisioning of ecosystem services, particularly for regulating and cultural services. Future exposure is expected to increase, especially in coastal areas and the Atlantic and Continental biogeographic regions. The potential invasion area is projected to increase by 77% on average. The study identified nine risk categories based on the combination of ecosystem service supply and invasion favorability. Safe areas, characterized by high service supply and low exposure, represented the dominant category for six of the seven ecosystem services. Critical areas, with low service provisioning and high exposure, accounted for a smaller portion. Hotspots, with high exposure and service supply, were particularly important for crop provision, flood control, and soil retention. The spatial distribution of risks varied across ecosystem services. Invasive species of European concern pose a threat to habitat maintenance in high latitude and altitude areas within the Boreal, Alpine, and Atlantic bioregions. The Atlantic bioregion is a hotspot for flood control, while the Boreal, Alpine, and Continental bioregions are hotspots for soil retention. The Atlantic and Continental bioregions are hotspots for crop provision, and the Atlantic, Continental, and parts of the Mediterranean bioregions are hotspots for timber provision. Outdoor recreation is also affected by invasive species, with hotspots well distributed across Europe. The study emphasizes the importance of monitoring and protecting areas at high risk for ecosystem services. The findings highlight the need for targeted conservation efforts and the development of policies to manage invasive species and protect biodiversity. The study provides a comprehensive spatial evaluation of the risks posed by invasive species to ecosystem services in Europe, contributing to the 2030 Biodiversity Strategy and the Kunming-Montreal Global Biodiversity Framework.Invasive species pose significant risks to ecosystem services in Europe, particularly affecting outdoor recreation, habitat maintenance, crop provision, and soil and nitrogen retention. The study assessed the current and potential future risks of 94 invasive species to seven key ecosystem services. Exposure to invasive species was higher in areas with lower ecosystem service provision, especially for regulating and cultural services. High-value ecosystem service areas, though small in Europe (0-13%), are disproportionately important for service conservation. The study highlights the need to monitor and protect these hotspots to align management strategies with international biodiversity targets. Since 1970, the capacity of nature to sustain human quality of life through biodiversity and ecosystem services has been declining. Invasive species are a major contributor to this decline. While the effects of biological invasions on native species and biodiversity are well-documented, their impacts on ecosystem services remain scattered and difficult to generalize. The study used risk assessments, species occurrence data, and ecosystem services mapping to evaluate the risks posed by invasive species at a continental scale. The study found that the current exposure of ecosystem services to invasion is more pronounced in areas with low provisioning of ecosystem services, particularly for regulating and cultural services. Future exposure is expected to increase, especially in coastal areas and the Atlantic and Continental biogeographic regions. The potential invasion area is projected to increase by 77% on average. The study identified nine risk categories based on the combination of ecosystem service supply and invasion favorability. Safe areas, characterized by high service supply and low exposure, represented the dominant category for six of the seven ecosystem services. Critical areas, with low service provisioning and high exposure, accounted for a smaller portion. Hotspots, with high exposure and service supply, were particularly important for crop provision, flood control, and soil retention. The spatial distribution of risks varied across ecosystem services. Invasive species of European concern pose a threat to habitat maintenance in high latitude and altitude areas within the Boreal, Alpine, and Atlantic bioregions. The Atlantic bioregion is a hotspot for flood control, while the Boreal, Alpine, and Continental bioregions are hotspots for soil retention. The Atlantic and Continental bioregions are hotspots for crop provision, and the Atlantic, Continental, and parts of the Mediterranean bioregions are hotspots for timber provision. Outdoor recreation is also affected by invasive species, with hotspots well distributed across Europe. The study emphasizes the importance of monitoring and protecting areas at high risk for ecosystem services. The findings highlight the need for targeted conservation efforts and the development of policies to manage invasive species and protect biodiversity. The study provides a comprehensive spatial evaluation of the risks posed by invasive species to ecosystem services in Europe, contributing to the 2030 Biodiversity Strategy and the Kunming-Montreal Global Biodiversity Framework.
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