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Resurrection of Dormant Daphnia magna: Protocol and Applications

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Published on: January 19, 2018

Evidence That Metapopulation Dynamics Maintain a Species' Range Limit.

Graydon J Gillies^1,2, Michael P Dungey¹, Christopher G Eckert¹

¹Department of Biology, Queen's University, Kingston, Ontario, Canada.

Ecology Letters

|May 6, 2025

Summary

Metapopulation dynamics, specifically declining colonization rates, help explain the northern range limit of the coastal dune plant Camissoniopsis cheiranthifolia. This suggests habitat availability influences species distribution.

Keywords:

biogeography dispersal habitat occupancy landscape ecology metapopulation patch dynamics plant ecology range edge range limit species distributions

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Area of Science:

Ecology
Biogeography
Plant Science

Background:

The metapopulation hypothesis suggests that variations in local extinction and colonization rates can create abrupt species range limits.
Understanding range limits is crucial for predicting species responses to environmental change.

Purpose of the Study:

To investigate the role of metapopulation dynamics in shaping the northern range limit of Camissoniopsis cheiranthifolia.
To quantify habitat availability and rates of colonization and extinction across the species' northern range.

Main Methods:

Field surveys across 3485 plots to assess habitat suitability and plant abundance.
Statistical analysis of colonization and extinction rates in relation to habitat and proximity to occupied plots.
Development and application of a metapopulation model incorporating spatial variation in dynamic rates.

Main Results:

Colonization rates increased with suitable habitat area and nearby plant abundance, declining towards the species' northern range limit.
Extinction rates were higher in plots with less habitat and lower initial abundance but did not show a significant trend towards the range limit.
The metapopulation model accurately predicted the observed decline in plot occupancy towards the range limit.

Conclusions:

Spatial variation in metapopulation dynamics, particularly declining colonization, contributes to the northern range limit of Camissoniopsis cheiranthifolia.
Habitat availability and local population density are key drivers of colonization and, consequently, range boundaries.