The gut microbiota of bumblebees

Area of Science:

• Ecology
• Microbiology
• Zoology

Background:

• Bumblebees (Bombus) are vital pollinators facing population declines.
• Microbial symbionts significantly impact animal biology, including bumblebees.
• A core set of beneficial gut bacteria is common in bumblebees.

Purpose of the Study:

• Synthesize current knowledge on bumblebee gut microbiota.
• Identify gaps in understanding bumblebee-microbe interactions.
• Propose future research directions and conservation strategies.

Main Methods:

• Literature synthesis of existing studies on bumblebee gut microbiota.
• Analysis of patterns in symbiont-host specificity and sociality.
• Review of evidence for symbiont-conferred protection against parasites.

Main Results:

• Bumblebee gut microbiota show host specificity influenced by social behavior.
• Individual bumblebees frequently lose symbionts.
• Symbionts provide protection against trypanosomatid parasites.
• Bumblebee and honeybee gut microbiotas exhibit key differences.

Conclusions:

• Mechanisms and ecological roles of bumblebee gut microbes require further investigation.
• Bumblebee microbiota influence host traits and stress responses.
• Microbiota manipulation may enhance bumblebee resilience to global change.