Recent human history governs global ant invasion dynamics

Area of Science:

• Ecology
• Biogeography
• Invasive Species Research

Background:

• Human trade and travel are dismantling biogeographic barriers, leading to significant shifts in global species distribution.
• The spatiotemporal patterns of alien species colonization and their drivers, particularly global trade, remain incompletely understood.

Purpose of the Study:

• To analyze the global distribution of alien ant species and identify distinct colonization patterns.
• To investigate how historical human events and globalization trends have influenced the spread of different alien species groups.
• To correlate species traits with their distribution patterns and invasiveness.

Main Methods:

• Analysis of the global distribution data for 241 alien ant species.
• Clustering species into distinct groups based on their worldwide distribution patterns.
• Correlation of species distribution with historical events (globalization, wars, recessions) and morphological/life-history traits.

Main Results:

• Identified four distinct groups of alien ant species with unique global distribution patterns compared to native species.
• Demonstrated that the spread of these groups was differentially influenced by historical globalization waves, world wars, and global recessions.
• Found significant differences in morphological and life-history traits, as well as invasiveness, among the four species groups.

Conclusions:

• Alien species colonization patterns are not uniform and can be categorized into distinct groups.
• Historical and socio-economic factors significantly shape the global spread of invasive species.
• Integrating distribution data with life-history traits enhances understanding of invasion dynamics and aids in predicting future invasive species.