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50-year anniversary of Lloyd's ``mean crowding'': Ideas on patchy distributions

, , and . Journal of Animal Ecology, (2018)
DOI: 10.1111/1365-2656.12854

Abstract

Abstract This year marks the 50th anniversary of Monte B. Lloyd's “Mean Crowding” (1967) paper, in which he introduced a metric that accounts for an individual's experience of conspecific density. Mean crowding allows ecologists to measure the degree of spatial aggregation of individuals in a manner relevant to intraspecific competition for resources. We take the concept of mean crowding a step beyond its most common usage and that it has a mathematical relationship to many of the most important concepts in ecology and evolutionary biology. Mean crowding, a first-order approximation of the degree of nonrandomness in a distribution, can function as a powerful heuristic that can unify concepts across disciplines in a more general way that Lloyd originally envisioned.

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