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Related Experiment Video

Updated: Aug 5, 2025

Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern

Visually Sexing Loggerhead Shrike Lanius Ludovicianus Using Plumage Coloration and Pattern

Published on: March 8, 2020

Terrain Ruggedness and Canopy Height Predict Short-Range Dispersal in the Critically Endangered Black-and-White

Amanda N Mancini^1,2, Aparna Chandrashekar^1,2, Jean Pierre Lahitsara³

¹Department of Anthropology, The Graduate Center, City University of New York, New York, NY 10016, USA.

|March 29, 2023

Summary

Black-and-white ruffed lemurs (Varecia variegata) use less rugged terrain and prefer tall-canopied forests for short-range dispersal. Maintaining forest continuity is crucial for lemur connectivity and gene flow.

Keywords:

Madagascar circuit theory conservation gravity models isolation-by-resistance landscape genetics

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Last Updated: Aug 5, 2025

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Published on: October 20, 2019

Area of Science:

Ecology
Conservation Biology
Genetics

Background:

Dispersal is key to primate population structuring, community dynamics, and evolution.
Environmental factors significantly influence primate dispersal, yet research often overlooks local habitat effects compared to landscape influences.

Purpose of the Study:

To investigate environmental drivers of short-range dispersal in black-and-white ruffed lemurs (Varecia variegata).
To differentiate between local (within-site) and landscape (between-site) environmental influences on dispersal.

Main Methods:

Utilized a landscape genetics approach to analyze dispersal patterns.
Examined environmental variables including terrain ruggedness and canopy height in southeastern Madagascar.

Main Results:

Between-site terrain ruggedness and canopy height were the most significant drivers of short-range dispersal.
Lemurs selected paths with lower terrain ruggedness, prioritizing tall-canopied forest habitats.
Scale-dependent effects were observed: forest structure influences short-range dispersal, while forest presence facilitates long-range dispersal and gene flow.

Conclusions:

Habitat structure, specifically forest height and continuity, is critical for facilitating primate dispersal and maintaining functional connectivity.
Conservation efforts should focus on preserving high-quality forests and ensuring landscape connectivity for species like the black-and-white ruffed lemur.