Within reach? Habitat availability as a function of individual mobility and spatial structuring

Matthiopoulos, J. , Fieberg, J., Aarts, G., Barraquand, F. and Kendall, B. E. (2020) Within reach? Habitat availability as a function of individual mobility and spatial structuring. American Naturalist, 195(6), pp. 1009-1026. (doi: 10.1086/708519) (PMID:32469662)

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Abstract

Organisms need access to particular habitats for their survival and reproduction. However, even if all necessary habitats are available within the broader environment, they may not all be easily reachable from the position of a single individual. Many species distribution models consider populations in environmental (or niche) space, hence overlooking this fundamental aspect of geographical accessibility. Here, we develop a formal way of thinking about habitat availability in environmental spaces by describing how limitations in accessibility can cause animals to experience a more limited or simply different mixture of habitats than those more broadly available. We develop an analytical framework for characterizing constrained habitat availability based on the statistical properties of movement and environmental autocorrelation. Using simulation experiments, we show that our general statistical representation of constrained availability is a good approximation of habitat availability for particular realizations of landscape-organism interactions. We present two applications of our approach, one to the statistical analysis of habitat preference (using step-selection functions to analyze harbor seal telemetry data) and a second that derives theoretical insights about population viability from knowledge of the underlying environment. Analytical expressions for habitat availability, such as those we develop here, can yield gains in analytical speed, biological realism, and conceptual generality by allowing us to formulate models that are habitat sensitive without needing to be spatially explicit.

Item Type:Articles
Keywords:Ecology, evolution, behavior and systematics.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Matthiopoulos, Professor Jason
Authors: Matthiopoulos, J., Fieberg, J., Aarts, G., Barraquand, F., and Kendall, B. E.
College/School:College of Medical Veterinary and Life Sciences > Institute of Biodiversity Animal Health and Comparative Medicine
Journal Name:American Naturalist
Publisher:University of Chicago Press
ISSN:0003-0147
ISSN (Online):1537-5323
Published Online:21 April 2020
Copyright Holders:Copyright © 2020 by The University of Chicago
First Published:First published in American Naturalist 195(6): 1009-1026
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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