Overview
Global assessments of the geographic distribution of damage caused by invasive alien species have been found to suffer from a systematic research bias. This bias previously led to an overrepresentation of reported impacts in the Global North (e.g., North America and Europe) simply because these regions conduct and document more research. Consequently, the actual burden of invasive species in the Global South has been significantly underestimated in prior analyses.
Research Context
Invasive alien species are recognized as significant contributors to species extinction globally. Understanding their distribution and impact is crucial for conservation efforts. However, previous methodologies for assessing this global distribution were influenced by geographical disparities in research output. Areas with higher research documentation tended to show higher numbers of invasive species and associated damage reports, which skewed the overall perception of where the problem was most acute.
Findings
The core finding indicates a systematic 'research bias' within global assessments of invasive alien species distribution. Due to this bias, regions like North America and Europe, which are part of the Global North, exhibited higher reported numbers of invasive species and corresponding damage. This was attributed to a greater volume of research and documentation originating from these wealthier areas, rather than a reflection of an inherently greater biological presence or impact of invasive species compared to the Global South. The implication is that the severity of the issue in the Global South was previously underestimated.