Topics

Inbreeding, Allee effects and stochasticity might be sufficient to account for Neanderthal extinction.

07:00 EST 27th November 2019 | BioPortfolio

Summary of "Inbreeding, Allee effects and stochasticity might be sufficient to account for Neanderthal extinction."

The replacement of Neanderthals by Anatomically Modern Humans has typically been attributed to environmental pressure or a superiority of modern humans with respect to competition for resources. Here we present two independent models that suggest that no such heatedly debated factors might be needed to account for the demise of Neanderthals. Starting from the observation that Neanderthal populations already were small before the arrival of modern humans, the models implement three factors that conservation biology identifies as critical for a small population's persistence, namely inbreeding, Allee effects and stochasticity. Our results indicate that the disappearance of Neanderthals might have resided in the smallness of their population(s) alone: even if they had been identical to modern humans in their cognitive, social and cultural traits, and even in the absence of inter-specific competition, Neanderthals faced a considerable risk of extinction. Furthermore, we suggest that if modern humans contributed to the demise of Neanderthals, that contribution might have had nothing to do with resource competition, but rather with how the incoming populations geographically restructured the resident populations, in a way that reinforced Allee effects, and the effects of inbreeding and stochasticity.

Affiliation

Journal Details

This article was published in the following journal.

Name: PloS one
ISSN: 1932-6203
Pages: e0225117

Links

DeepDyve research library

PubMed Articles [15023 Associated PubMed Articles listed on BioPortfolio]

Inbreeding risk and maternal support have opposite effects on female chimpanzee dispersal.

Sex-biased dispersal is usually driven by a combination of inbreeding avoidance and intrasexual competition. Walker and Pusey show that dispersal decisions in chimpanzees are most influenced by inbree...

The Neanderthal endocast from Gánovce (Poprad, Slovak Republic).

A Neanderthal endocast, naturally formed by travertine within the crater of a thermal spring, was found at Gánovce, near Poprad (Slovakia), in 1926, and dated to 105 ka. The endocast is partially cov...

Sibling competition does not magnify inbreeding depression in North American Arabidopsis lyrata.

About half of all angiosperms have some form of molecular self-incompatibility to promote outcrossing. If self-incompatibility breaks down, inbreeding depression (δ) is the main barrier to the evolut...

Identifying and Interpreting Apparent Neanderthal Ancestry in African Individuals.

Admixture has played a prominent role in shaping patterns of human genomic variation, including gene flow with now-extinct hominins like Neanderthals and Denisovans. Here, we describe a novel probabil...

Inbreeding does not alter the response to an experimental heat wave in a freshwater snail.

Global climate change affects natural populations of many species by increasing the average temperature and the frequency of extreme weather events (e.g. summer heat waves). The ability of organisms t...

Clinical Trials [2652 Associated Clinical Trials listed on BioPortfolio]

Behavioral Economic Methods for Assessing Tobacco Product Abuse Liability: Study 7

Participants will be given the opportunity to purchase ventilated, unventilated, and alternative nicotine products at different prices using an account balance based on their typical, dail...

Effects of Dietary Supplements on Sarcopenic Elders

Sarcopenia is defined as a syndrome characterized by decline of skeletal muscle mass and strength or an alteration in physical function. Although some studies showed nutritional supplement...

An Intervention to Reduce Risk Factors for Adolescent Pregnancy

Investigators will assess the preliminary effects of Girls Invest, an innovative savings intervention that aims to reduce economic, social, and health behavior risks associated with dispro...

Effect on Patient Quality of Life of Taking Into Account the Spiritual Dimension in Nurse's Care for Haematologic Cancers.

Pilot study on feasibility of taking into account spiritual dimension in nurse's care of patients with haematologic cancer

A Study for Sufficient Acarbose Decreased Glucose Excursion in Type 2 Diabetic Patients

This is a multicentre observational study to investigate the improvement in glucose fluctuation of sufficient acarbose therapy on type 2 diabetes patient with high blood glucose fluctuatio...

Medical and Biotech [MESH] Definitions

A reduced GENETIC VARIATION and GENETIC FITNESS due to INBREEDING.

Observation of a population for a sufficient number of persons over a sufficient number of years to generate incidence or mortality rates subsequent to the selection of the study group.

The magnitude of INBREEDING in humans.

The relating of causes to the effects they produce. Causes are termed necessary when they must always precede an effect and sufficient when they initiate or produce an effect. Any of several factors may be associated with the potential disease causation or outcome, including predisposing factors, enabling factors, precipitating factors, reinforcing factors, and risk factors.

The mating of plants or non-human animals which are closely related genetically.

Quick Search


DeepDyve research library

Searches Linking to this Article