Behavioral states help translate dispersal movements into spatial distribution patterns of floaters

The American Naturalist
María del Mar Delgado, Vincenzo Penteriani

Abstract

Within the field of spatial ecology, it is important to study animal movements in order to better understand population dynamics. Dispersal is a nonlinear process through which different behavioral mechanisms could affect movement patterns. One of the most common approaches to analyzing the trajectories of organisms within patches is to use random-walk models to describe movement features. These models express individual movements within a specific area in terms of random-walk parameters in an effort to relate movement patterns to the distributions of organisms in space. However, only using the movement trajectories of individuals to predict the spatial spread of animal populations may not fit the complex distribution of individuals across heterogeneous environments. When we empirically tested the results from a random-walk model (a residence index) used to predict the spatial equilibrium distribution of individuals, we found that the index severely underestimated the spatial spread of dispersing individuals. We believe this is because random-walk models only account for the effects of environmental conditions on individual movements, completely overlooking the crucial influence of behavior changes over time. In the future, bot...Continue Reading

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Citations

Jun 23, 2010·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Juan M MoralesDaniel T Haydon
Nov 7, 2013·BMC Ecology·Ewan D WestonXavier Lambin
May 30, 2013·PloS One·Benjamin P PauliEric J Gustafson
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Jul 14, 2010·Molecular Ecology·Winsor H Lowe, Fred W Allendorf
Jan 28, 2010·The Journal of Animal Ecology·María del Mar DelgadoVilis O Nams
Apr 8, 2015·Die Naturwissenschaften·Vincenzo PenterianiLetizia Campioni
Nov 20, 2016·The Journal of Animal Ecology·Cheryl B SchultzElizabeth E Crone
Aug 5, 2017·Biological Reviews of the Cambridge Philosophical Society·Marjo SaastamoinenMaria Del Mar Delgado

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