SCALING UP ANIMAL MOVEMENTS IN HETEROGENEOUS LANDSCAPES: THE IMPORTANCE OF BEHAVIOR
EcologyPublished 1 August 2002
Juan M. Morales, Stephen P. Ellner
Citations255
SJR quartileQ1
SJR score2.04
SNIP1.53
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TL;DR
This work found that conventional correlated random walk models with constant parameters severely underestimated spatial spread because organisms changed movement behaviors over time, but a model incorporating behavioral heterogeneity between individuals, and within individuals over time was able to account for observed patterns of spread.
Abstract
Two major challenges of spatial ecology are understanding the effects of landscape heterogeneity on movement, and translating observations taken at small spatial and temporal scales into expected patterns at greater scales. Using a combination of computer simulations and micro-landscape experiments with Tribolium confusum beetles we found that conventional correlated random walk models with constant parameters severely underestimated spatial spread because organisms changed movement behaviors over time. However, a model incorporating behavioral heterogeneity between individuals, and within individuals over time, was able to account for observed patterns of spread. Our results suggest that the main challenge for scaling up movement patterns resides in the complexities of individual behavior rather than in the spatial structure of the landscape.
Keywords
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