The COVID-19 Restrictions and Biological Invasion: A Global Terrestrial Ecosystem Perspective on Propagule Pressure and Invasion Trajectory

Biological invasions driven by climate change, transportation, and intercontinental trade, as well as land-use change and tourism, pose severe threats to biodiversity and ecosystem services worldwide. However, the COVID-19-induced shutdowns and cross-border restrictions could have significantly impacted some of these drivers. Thus, COVID-19-induced restrictions may potentially alter the invasion trajectories and propagule pressure of invasive alien species, yet very few studies have examined this possibility. Here, we provide a unique conceptual framework to examine how COVID-19-induced restrictions may influence the rate, magnitude, and trajectories of biological invasions. We also discuss the similarities between the high-hit regions of COVID-19 and the global hotspot of biological invasions. Additionally, we assessed whether previous predictions of biological invasions still hold despite the strong impact of COVID-19 on the drivers of invasions. Finally, we emphasize the possibility of harnessing such restrictive measures to manage invasive species, nature reserves, and national parks. The present study is a significant addition to the current understanding of the interplay between pandemic outbreaks and biological invasions in the context of both direct and indirect effects of global ecosystem change.

Automated summary

The COVID-19-induced restrictions have the potential to alter the trajectories and propagule pressure of biological invasions, with similarities found between high-hit regions of COVID-19 and global invasion hotspots. These restrictions could be harnessed for managing invasive species, nature reserves, and national parks.