A Practical Guide to the Study of Distribution Limits.

Area of Science:

• Ecology and Evolutionary Biology
• Species Distribution Modeling
• Conservation Biology

Background:

• Geographic distribution limits are crucial for understanding species' ecological and evolutionary processes.
• Predicting species' responses to environmental change necessitates a thorough understanding of these distribution limits.
• While factors like dispersal limitation and population size are recognized, no single factor universally explains distribution limits.

Purpose of the Study:

• To provide a comprehensive guide for investigating the factors that determine species' geographic distribution limits.
• To integrate established causes (e.g., dispersal limitation, environmental heterogeneity) with understudied factors (e.g., mutational load, trait integration).
• To offer a framework for predicting distribution limits of both native and invasive species under changing environmental conditions.

Main Methods:

• Integration of established ecological factors with understudied evolutionary and genetic factors.
• Utilization of quantitative genetic and genomic analyses to identify sources of distribution limits.
• Application of eco-evolutionary modeling to predict species distributions.

Main Results:

• A practical framework is presented for analyzing the multifaceted determinants of species distribution limits.
• The framework highlights the utility of integrating diverse analytical approaches, including modeling and genetic analyses.
• The proposed approach is applicable to predicting distribution limits under climate change and for invasive species.

Conclusions:

• A unified approach is needed to understand the complex factors governing species' geographic distributions.
• Eco-evolutionary modeling, informed by genetic and genomic data, offers powerful predictive capabilities.
• This framework aids in predicting species' range shifts and potential impacts of environmental change.