Experimental demonstration of an Allee effect in microbial populations
نویسندگان
چکیده
منابع مشابه
Experimental demonstration of an Allee effect in microbial populations.
Microbial populations can be dispersal limited. However, microorganisms that successfully disperse into physiologically ideal environments are not guaranteed to establish. This observation contradicts the Baas-Becking tenet: 'Everything is everywhere, but the environment selects'. Allee effects, which manifest in the relationship between initial population density and probability of establishme...
متن کاملGenetic diversity in introduced populations with an Allee effect.
A phenomenon that strongly influences the demography of small introduced populations and thereby potentially their genetic diversity is the demographic Allee effect, a reduction in population growth rates at small population sizes. We take a stochastic modeling approach to investigate levels of genetic diversity in populations that successfully overcame either a strong Allee effect, in which po...
متن کاملAllee effect in eukaryotic cell populations
The suspension culture of cells at provides an opportunity to study the multicellular life at low cell densities. In our earlier work with the model eukaryote Dictyostelium discoideum, we argued that the familiar but not understood transition from slow-to-fast growth at low cell densities (lag-log transition) was a collective, Allee effect during which cells communicate their density to one ano...
متن کاملTime-lag in extinction dynamics in experimental populations: evidence for a genetic Allee effect?
1. Propagule pressure, i.e. the number of individuals introduced, is thought to be a major predictor of the establishment success of introduced populations in the field. Its influence in laboratory experimental systems has however been questioned. In fact, other factors involved in long-term population persistence, like habitat size, were usually found to explain most of the dynamics of experim...
متن کاملAllee effects in stochastic populations
The Allee effect, or inverse density dependence at low population sizes, could seriously impact preservation and management of biological populations. The mounting evidence for widespread Allee effects has lately inspired theoretical studies of how Allee effects alter population dynamics. However, the recent mathematical models of Allee effects have been missing another important force prevalen...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Biology Letters
سال: 2016
ISSN: 1744-9561,1744-957X
DOI: 10.1098/rsbl.2016.0070