Allee Effects in Ecology and Conservation

Allee effects

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Exceptional customer service Get specialist help and advice. Allee effects are broadly defined as a decline in individual fitness at low population size or density. They can result in critical population thresholds below which populations crash to extinction. As such, they are very relevant to many conservation programmes, where scientists and managers are often working with populations that have been reduced to low densities or small numbers.

There are a variety of mechanisms that can create Allee effects including mating systems, predation, environmental modification, and social interactions. The abrupt and unpredicted collapses of many exploited populations is just one illustration of the need to bring Allee effects to the forefront of conservation and management strategies. Allee Effects in Ecology and Conservation provides a concise yet authoritative overview of the topic, collating and integrating a widely dispersed literature from various fields — marine and terrestrial, plant and animal, theoretical and empirical, academic and applied.

This accessible text, with its clear and simple explanations of both empirical observations and theoretical predications is particularly suitable for professional and academic ecologists requiring an overview of the state-of-the-art in Allee effect research, as well as for graduate students in population ecology and conservation biology.

It will also be of relevance to a wide readership of professionals in conservation and management requiring a concise summary of the topic. What are Allee effects? Mechanisms for Allee effects 3.

Population dynamics: modelling demographic Allee effects 4. Genetics and evolution 5. Conservation and management 6.

Allee effects | Kramer Ecology Lab

Conclusions and perspectives References Index. Probably the greatest contributions this publication makes are the compilation, in a single place, of the many species in which Allee effects have been documented and a complete bibliography of the primary literature. I throughly recommend the book for graduate reading seminars, and as an essential acquisition for libraries and ecologists' bookshelves.

Newsletter Google 4. Help pages. My research focuses on understanding the mechanisms and consequences of positive density dependence, which is important in aquatic species from sea urchins to salmon to copepods. Current projects include experimental tests for Allee effects in aquatic microbes, studying mate limitation and predator satiation in zooplankton populations, and studying the evolution of Allee effects.

PDF Project. Toggle navigation Kramer Ecology Lab. Allee effects. Density-dependent selection on mate-searching traits and evolution of mate-finding Allee effects.

Distribution patterns of metapopulation determined by Allee effects. Population Ecology. Charlesworth D, Charlesworth B. Inbreeding depression and its evolutionary consequences.

Citations per year

Annual Review of Ecology and Systematics. Introduction to Conservation Genetics. Cambridge University Press, Cambridge; Inverse density dependence and the Allee effect. Trends in Ecology and Evolution. What is the Allee effect? Hammond DS. Post-dispersal seed and seeding dispersal in tropical dry forest trees after shifting agriculture, Chiapas, Mexico. Journal of Tropical Ecology. Amarasekare P. Allee effects in metapopulation dynamics. Hanski I. Metapopulation Ecology.

Franck Courchamp, Ludek Berec, and Joanna Gascoigne

Zhou SR, Wang G. Allee-like effects in metapopulations dynamics. Multiple Allee effects and population management. Ferson S, Burgman MA. The dangers of being few: demographic risk analysis for rare species extinction. New York State Museum Bulletin. Ecology: Individuals, Populations and Communites. Blackwell, Oxford; Organisms as ecosystem engineers. Ecosystem engineering in space and time. Ecology Letters, ; — Eco-evolutionary feedbacks in community and ecosystem ecology: interactions between the ecological theatre and the evolutionary play.

Predator–prey system with strong Allee effect in prey

Philosophical Transactions of the Royal Society. Series B: Biological Sciences. Seto M, Iwasa Y. Regime shift and robustness of organism-created environments: A model for microbial ecosystems. Journal of Theoretical Biology. Allee effect in larval resource exploitation in Drosophila: an interaction among density of adults, larvae, and micro-organisms.

Ecological Entomology. Density dependence, spatial scale and patterning in sessile biota. Levins R.

Bulletin of the ESA. Interaction between habitat quality and an Allee-like effect in metapopulation. Ecological Modelling. The competitive dynamics of metapopulations subject to the Allee-like effect. Theoretical Population Biology. The stability of predator-prey systems subject to the Allee effects. The competitive dynamics of populations subject to an Allee effect.

Exactly solvable models of biological invasion. Spatiotemporal dynamics and distribution patterns of cyclic competition in metapopulation. Dynamical complexity and metapopulation persistence. Using ecosystem engineers to restore ecological systems. Niche construction for desert plants in individual and population scales: theoretical analysis and evidences from saksaul Haloxylon ammodendron forests.

Israel journal of plant sciences. Biophysical feedback mediates effects of invasive grasses on coastal dune shape. Metapopulation dynamics and distribution, and environmental heterogeneity induced by niche construction. Murray JD. Mathematical Bilolgy.

Springer, Berlin; Self-organisation of vegetation in arid ecosystems. Self-organized patchiness and catastrophic shifts in ecosystems. Gascoigne J, Lipcius RN.

Allee Effects

Periodic dynamics in a two-stage Allee effect model are driven by tension between stage equilibria. Berryman AA. On principles, laws and theory in population ecology. On the mechanistic underpinning of discrete-time population models with Allee effect. Estimating Allee dynamics before they can be observed: polar bears as a case study. Tayor CM, Hastings A. Allee effects in biological invasions. Ecology Letters. Stephens PA. Two may be company but three is seldom a crowd: Allee Effects in Ecology and Conservation.

Conservation Biology. The evidence for Allee effects. Influence of isolation degree of spatial patterns on persistence of populations. Influence of time delay and nonlinear diffusion on herbivore outbreak. Commun Nonlinear Sci Numer Simulat. Li L, Jin Z. Pattern dynamics of a spatial predator—prey model with noise. Pattern transitions in spatial epidemics: Mechanisms and emergent properties.

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