Founder effects drive the genetic structure of passively dispersed aquatic invertebrates

Published on Dec 11, 2018in PeerJ 2.12
· DOI :10.7717/peerj.6094
Javier Montero-Pau10
Estimated H-index: 10
(University of Valencia),
Africa Gómez27
Estimated H-index: 27
(University of Hull),
Manuel Serra30
Estimated H-index: 30
(University of Valencia)
Abstract
Populations of passively dispersed organisms in continental aquatic habitats typically show high levels of neutral genetic differentiation, despite their high dispersal capabilities. Several evolutionary factors, including founder events and local adaptation, and life cycle features such as high population growth rates and the presence of propagule banks, have been proposed to be responsible for this paradox. Here, we have modeled the colonization process in these organisms to assess the impact of migration rate, growth rate, population size, local adaptation and life-cycle features on their population genetic structure. Our simulation results show that the strongest effect on population structure is caused by persistent founder effects, resulting from the interaction of a few population founders, high population growth rates, large population sizes and the presence of diapausing egg banks. In contrast, the role of local adaptation, genetic hitchhiking and migration is limited to small populations in these organisms. Our results indicate that local adaptation could have different impact on genetic structure in different groups of zooplankters.
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References76
Published on Apr 1, 2012in Molecular Ecology 6.13
Valérie Le Corre17
Estimated H-index: 17
(Institut national de la recherche agronomique),
Antoine Kremer60
Estimated H-index: 60
(University of Bordeaux)
Most adaptive traits are controlled by large number of genes that may all together be the targets of selection. Adaptation may thus involve multiple but not necessarily substantial allele frequency changes. This has important consequences for the detection of selected loci and implies that a quantitative genetics framework may be more appropriate than the classical ‘selective sweep’ paradigm. Preferred methods to detect loci involved in local adaptation are based on the detection of ‘outlier’ va...
164 Citations Source Cite
Published on Aug 1, 2011in Freshwater Biology 3.77
Bram Vanschoenwinkel22
Estimated H-index: 22
(Katholieke Universiteit Leuven),
Aline Waterkeyn16
Estimated H-index: 16
(Katholieke Universiteit Leuven)
+ 5 AuthorsLuc Brendonck36
Estimated H-index: 36
(Katholieke Universiteit Leuven)
SUMMARY 1. Recent findings hint at the potential importance of mammals affecting the spatial dynamics of aquatic organisms in areas where mammals live in close association with water. Perhaps the most iconic example of such an environment is the African savannah. 2. We investigated dispersal patterns of freshwater organisms among a set of temporary ponds in SE Zimbabwe to test the hypothesis that large mammals, and particularly African elephants (Loxodonta africana), can be important vectors of ...
41 Citations Source Cite
Published on Jun 1, 1974in Genetics 4.08
Paul D. N. Hebert87
Estimated H-index: 87
In temporary habitats populations of the cyclical parthenogen, Daphnia magna, are re-established each year from sexual eggs and reproduce parthenogenetically for two or at most three generations. The genetic effects of this breeding system have been investigated by analyzing allozyme frequencies in nineteen intermittent populations.—Genotypic frequencies at polymorphic loci were ordinarily found to be in good agreement with Hardy-Weinberg proportions and disequilibria between loci were not obser...
105 Citations
Published on Aug 1, 2007in Molecular Ecology 6.13
Africa Gómez27
Estimated H-index: 27
(University of Hull),
Javier Montero-Pau10
Estimated H-index: 10
(University of Valencia)
+ 2 AuthorsSergi Campillo5
Estimated H-index: 5
(University of Valencia)
Recent phylogeographical assessments have consistently shown that continental zooplankton display high levels of population subdivision, despite the high dispersal capacity of their diapausing propagules. As such, there is an apparent paradox between observed cosmopolitanism in the zooplankton that is associated with long-distance dispersal, and strong phylogeographical structures at a regional scale. Such population dynamics, far from migration–drift equilibrium, have been shown in the rotifer ...
61 Citations Source Cite
Published on Dec 1, 2015in Evolution 3.82
Jennifer N. Lohr2
Estimated H-index: 2
(University of Fribourg),
Christoph R. Haag1
Estimated H-index: 1
(University of Fribourg)
Reduced population size is thought to have strong consequences for evolutionary processes as it enhances the strength of genetic drift. In its interaction with selection, this is predicted to increase the genetic load, reduce inbreeding depression, and increase hybrid vigor, and in turn affect phenotypic evolution. Several of these predictions have been tested, but comprehensive studies controlling for confounding factors are scarce. Here, we show that populations of Daphnia magna, which vary st...
14 Citations Source Cite
Published on Nov 1, 2011in Molecular Ecology 6.13
Jonathan M. Waters40
Estimated H-index: 40
(University of Otago)
Phylogeographic and evolutionary research programmes have successfully elucidated compelling genetic signatures of earth history. Particularly influential achievements include the demonstration of postglacial recolonization patterns for high-latitude taxa and phylogenetic demonstration of the ‘progression rule’ along oceanic island chains such as Hawaii. While both of these major biogeographic patterns clearly rely on rapid dispersal over long distances, their phylogeographic detection also appa...
65 Citations Source Cite
Published on Dec 7, 2009in PLOS ONE 2.77
Ana M. Tortajada2
Estimated H-index: 2
(University of Valencia),
María José Carmona20
Estimated H-index: 20
(University of Valencia),
Manuel Serra30
Estimated H-index: 30
(University of Valencia)
Background Inbreeding depression is an important evolutionary factor, particularly when new habitats are colonized by few individuals. Then, inbreeding depression by drift could favour the establishment of later immigrants because their hybrid offspring would enjoy higher fitness. Rotifers are the only major zooplanktonic group where information on inbreeding depression is still critically scarce, despite the fact that in cyclical parthenogenetic rotifers males are haploid and could purge delete...
21 Citations Source Cite
Published on Feb 1, 2008in Limnologica 1.81
Silvia Tavernini7
Estimated H-index: 7
(University of Parma)
Abstract The results of a research carried out in 2001 on nine temporary mountain pools (Northern Apennines, Italy) underlined a major role of hydroperiod in shaping zooplankton communities of temporary habitats. In 2002, the same pools were studied to assess inter-annual differences in zooplankton seasonal patterns. Data on precipitations (both snow and rainfalls) were collected to evaluate the influence of precipitation regimes on hydroperiod and concurrently on hydrochemical features and zoop...
22 Citations Source Cite
Published on Apr 1, 2002in Trends in Ecology and Evolution 15.94
Thomas Lenormand34
Estimated H-index: 34
(Centre national de la recherche scientifique)
In general, individuals who survive to reproduce have genotypes that work relatively well under local conditions. Migrating or dispersing offspring elsewhere is likely to decrease an individual's or its offspring's fitness, not to mention the intrinsic costs and risks of dispersal. Gene flow into a population can counteract gene frequency changes because of selection, imposing a limit on local adaptation. In addition, the migrant flow tends to be higher from densely populated to sparsely populat...
1,030 Citations Source Cite
Published on May 20, 2011in PLOS ONE 2.77
Javier Montero-Pau10
Estimated H-index: 10
(University of Valencia),
Manuel Serra30
Estimated H-index: 30
(University of Valencia)
The increasing evidence of coexistence of cryptic species with no recognized niche differentiation has called attention to mechanisms reducing competition that are not based on niche-differentiation. Only sex-based mechanisms have been shown to create the negative feedback needed for stable coexistence of competitors with completely overlapping niches. Here we show that density-dependent sexual and diapause investment can mediate coexistence of facultative sexual species having identical niches....
28 Citations Source Cite
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