Genomic Research Shows Almost Complete Loss of Fiji’s Indigenous Bees Since Colonization

Recent genomic work on Fiji’s indigenous bees reveals that the archipelago has experienced an approximate 99 % drop in its original pollinator population since the arrival of European colonists, the researchers reported on Phys.org.

Researchers analyzed DNA extracted from museum samples gathered in the 1800s and early 1900s, juxtaposing them with material obtained from extant colonies. Tracking changes in genetic variation across the centuries allowed them to gauge the magnitude of the loss, determining that the effective population sizes of multiple endemic bee species have plummeted.

The findings mirror a global trend of pollinator declines driven by habitat alteration, pesticide use, and climatic stressors. Bees, butterflies and other insects are essential for pollinating wild plants and agricultural crops, and their decline endangers both food security and biodiversity. Although numerous species have been examined in temperate zones, pollinators on tropical islands have largely escaped documentation until this study.

Fiji’s distinctive habitats, home to many endemic flora, proved particularly susceptible to land‑use shifts brought by colonization, including the growth of sugarcane farms and subsequent tourism development. The loss of native vegetation, together with the arrival of alien bee species and contemporary agro‑chemicals, probably hastened the genetic bottleneck documented by the researchers.

Conservation experts argue that the study highlights the pressing need to safeguard the remaining habitats and adopt pollinator‑friendly measures. Reestablishing indigenous flowering plants, curbing pesticide use, and encouraging community‑based monitoring initiatives may help stabilize the scant surviving colonies.

The team intends to apply their genomic methodology to additional Pacific islands, aiming to chart the concealed effects of historic colonization on insect diversity throughout the area. Such information could guide regional policies designed to protect pollinators that support ecological resilience and agricultural output.