Translocation strategies for multiple species depend on interspecific interaction type

Area of Science:

• Ecology
• Conservation Biology
• Population Dynamics

Background:

• Conservation translocations, moving species to prevent extinction, are increasing.
• Current guidelines often overlook interspecific interactions, risking translocation failure.
• Multispecies translocations require considering how species influence each other.

Purpose of the Study:

• To model multispecies translocations considering different interaction types (consumer-resource, mutualism, competition).
• To assess how interaction types influence optimal founder population sizes and translocation order (simultaneous vs. sequential).
• To evaluate the impact of interaction strength and time delays in translocations.

Main Methods:

• Modeling three distinct two-species systems.
• Analyzing consumer-resource, mutualism, and competition dynamics.
• Simulating simultaneous and sequential translocation strategies.

Main Results:

• Translocation success depends on interaction type and founder population size.
• Consumer-resource systems have both minimum and maximum founder population limits.
• Sequential translocations benefit competitive and consumer-resource systems; order matters less for mutualists.

Conclusions:

• Interspecific interactions are critical for population dynamics and must be integrated into translocation planning.
• Translocation strategies need tailoring based on species interaction types.
• Findings are applicable to reintroductions, biological control, and ecosystem restoration.