Animal Aggregations

Allee, W. C.

doi:10.1086/394281

Cited by 203 publications

(130 citation statements)

References 0 publications

Supporting

Mentioning

129

Contrasting

Order By: Relevance

“…In particular, the high extinction risk of small populations has been usually associated either with reductions in the fecundity and survival of the breeders under stochastic scenarios or with reductions in those parameters as the population size decreases (i.e. the Allee effect [10,11]). The impact of a reduction in the number of floaters (i.e.…”

Section: Introductionmentioning

confidence: 99%

Floaters may buffer the extinction risk of small populations: an empirical assessment

Robles

Ciudad

2017

Proc. R. Soc. B.

View full text Add to dashboard Cite

The high extinction risk of small populations is commonly explained by reductions in fecundity and breeder survival associated with demographic and environmental stochasticity. However, ecological theory suggests that population extinctions may also arise from reductions in the number of floaters able to replace the lost breeders. This can be particularly plausible under harsh fragmentation scenarios, where species must survive as small populations subjected to severe effects of stochasticity. Using a woodpecker study in fragmented habitats (2004 -2016), we provide here empirical support for the largely neglected hypothesis that floaters buffer population extirpation risks. After controlling for population size, patch size and the intrinsic quality of habitat, populations in patches with floaters had a lower extinction probability than populations in patches without floaters (0.013 versus 0.131). Floaters, which often replace the lost breeders, were less likely to occur in small and low-quality patches, showing that population extirpations may arise from unnoticed reductions in floater numbers in poor-quality habitats. We argue that adequate pools of the typically overlooked floaters may buffer extirpation risks by reducing the detrimental impacts of demographic and environmental stochasticity. However, unravelling the influence of floaters in buffering stochastic effects and promoting population stability require additional studies in an ample array of species and stochastic scenarios.

show abstract

Section: Introductionmentioning

confidence: 99%

Floaters may buffer the extinction risk of small populations: an empirical assessment

Robles

Ciudad

2017

Proc. R. Soc. B.

View full text Add to dashboard Cite

show abstract

“…The concept of the Allee effect is not new: it originates from observations made by Warder Allee in the 1930s that survival and reproduction are often limited by a lack of conspecifics, and that this can lead to population decline at low densities (Allee 1931). This effect, probably one of the most exciting concepts in ecology, was long neglected but more recently re-discovered because of its profound implications for a variety of problems.…”

mentioning

confidence: 99%

Mate‐location failure, the Allee effect, and the establishment of invading populations

Yamanaka

Liebhold

2009

Population Ecology

View full text Add to dashboard Cite

“…The so-called Allee effect (Allee 1931(Allee , 1951(Allee , 1958) is a common term for a group of phenomena associated with negative density-dependent reproductive success affecting the rate of population growth. Initial findings demonstrated for the flour beetle Tribolium confusum that small population densities were associated with low population growth rates (Allee et al 1949).…”

mentioning

confidence: 99%

Allee effect, sexual selection and demographic stochasticity

Møller¹,

Legendre²

2001

Oikos

114

View full text Add to dashboard Cite

Legendre, S. 2001. Allee effect, sexual selection and demographic stochasticity. -Oikos 92: 27 -34.The negative frequency-dependent effect of reproductive success in animals on population growth refers to a category of phenomena termed the Allee effect. The mechanistic basis for this effect and hence an understanding of its consequences has been obscure. We suggest that sexual selection, in particular female mate preferences, is a previously neglected component giving rise to the Allee effect. Lack of breeding and reduced reproductive success of females at low population densities are commonly described in situations where females have little or no opportunity to choose a mate, consistent with this suggestion. We developed a demographic model that incorporated the effects of lack of female choice on rates of reproduction. Using either a mating system with incompatibility or a system with a directional mate preference, we show that commonly encountered levels of reproductive suppression in the absence of suitable mates in a population, where sexual selection still operates, may increase the effects of demographic stochasticity considerably.

show abstract

Animal Aggregations

Cited by 203 publications

References 0 publications

Floaters may buffer the extinction risk of small populations: an empirical assessment

Floaters may buffer the extinction risk of small populations: an empirical assessment

Mate‐location failure, the Allee effect, and the establishment of invading populations

Allee effect, sexual selection and demographic stochasticity

Contact Info

Product

Resources

About