Case studies and mathematical models of ecological speciation. 2. Palms on an oceanic island

@article{Gavrilets2007CaseSA,
  title={Case studies and mathematical models of ecological speciation. 2. Palms on an oceanic island},
  author={S. Gavrilets and A. Vose},
  journal={Molecular Ecology},
  year={2007},
  volume={16}
}
A recent study of a pair of sympatric species of palms on the Lord Howe Island is viewed as providing probably one of the most convincing examples of sympatric speciation to date. Here we describe and study a stochastic, individual‐based, explicit genetic model tailored for this palms system. Overall, our results show that relatively rapid (< 50 000 generations) colonization of a new ecological niche, and sympatric or parapatric speciation via local adaptation and divergence in flowering… Expand
Case studies and mathematical models of ecological speciation. 1. Cichlids in a crater lake
TLDR
A stochastic, individual‐based, explicit genetic model tailored for this cichlid system shows that relatively rapid colonization of a new ecological niche and (sympatric or parapatric) speciation via local adaptation and divergence in habitat and mating preferences are theoretically plausible. Expand
Case studies and mathematical models of ecological speciation. V. Adaptive divergence of whitefish in Fennoscandia
TLDR
This work applies modeling tools to better understand adaptive divergence of whitefish during the postglacial period in lakes of northern Fennoscandia, and identifies factors required for in situ emergence of the pelagic and profundal morphs in lakes initially colonized by the littoral morph. Expand
Case Studies and Mathematical Models of Ecological Speciation. 4. Hybrid Speciation in Butterflies in a Jungle
TLDR
This model supports the possibility of hybrid origin of H. heurippa under certain conditions and attempts to account for empirical patterns and data on genetic incompatibility, mating preferences and selection by predation, habitat preference, and local adaptation for all three Heliconius species. Expand
Ecological speciation in sympatric palms: 1. Gene expression, selection and pleiotropy
TLDR
Six plausible ecological speciation loci are put forward, providing support for the hypothesis that pleiotropy could help to overcome the antagonism between selection and recombination during speciation with gene flow. Expand
Refining the conditions for sympatric ecological speciation
  • F. Débarre
  • Biology, Medicine
  • Journal of evolutionary biology
  • 2012
TLDR
This article analytically derive conditions for sympatric speciation in a general model where the distribution of resources can be uni‐ or bimodal, and where a parameter controls the range of resources that an individual can exploit. Expand
How sympatric is speciation in the Howea palms of Lord Howe Island?
TLDR
It is found that Howea forsteriana is less abundant than Howea belmoreana, and speciation in Howea was indeed sympatric, although under certain strict definitions it may be called parapatric. Expand
Using mathematical modelling to investigate the adaptive divergence of whitefish in Fennoscandia
TLDR
This work applies modeling tools to better understand adaptive divergence of whitefish during the postglacial period in lakes of northern Fennoscandia, and identifies factors required for in situ emergence of the pelagic and profundal morphs in lakes initially colonized by the littoral morph. Expand
Case studies and mathematical models of ecological speciation. 3: Ecotype formation in a Swedish snail
TLDR
The model shows that ecotypes are expected to form rapidly in parapatry under conditions applicable to Swedish L. saxatilis and may proceed to speciation, and highlights that ecotype formation and speciation are distinct processes. Expand
Ecological speciation in sympatric palms: 2. Pre‐ and post‐zygotic isolation
TLDR
The results are indicative of divergent selection in reproductive isolation, although it does not solely explain the current distribution of the two species on LHI. Expand
ADAPTIVE RADIATION DRIVEN BY THE INTERPLAY OF ECO‐EVOLUTIONARY AND LANDSCAPE DYNAMICS
TLDR
It is shown that landscape dynamics can generate a significantly higher diversity than allopatric or sympatric speciation alone, possibly subject to the temporary collapse of all species into a hybrid swarm. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 82 REFERENCES
Case studies and mathematical models of ecological speciation. 1. Cichlids in a crater lake
TLDR
A stochastic, individual‐based, explicit genetic model tailored for this cichlid system shows that relatively rapid colonization of a new ecological niche and (sympatric or parapatric) speciation via local adaptation and divergence in habitat and mating preferences are theoretically plausible. Expand
Sympatric speciation in palms on an oceanic island
TLDR
A large dated phylogenetic tree shows that the two species of Howea, endemic to the remote Lord Howe Island, are sister taxa and diverged from each other well after the island was formed 6.9 million years ago. Expand
Adaptive dynamics as a mathematical tool for studying the ecology of speciation processes
TLDR
The issue of speciation appeared to be settled: according to the established dogma, biological diversification occurred in allopatry due to the accumulation of genetic differences in geographically isolated populations, but this view still prevails today, although perhaps less dominantly than before. Expand
On the origin of species by sympatric speciation
TLDR
This work uses multilocus genetics to describe sexual reproduction in an individual-based model and considers the evolution of assortative mating, which leads to reproductive isolation between ecologically diverging subpopulations and conforms well with mounting empirical evidence for the sympatric origin of many species. Expand
ECOLOGICAL FACTORS IN SPECIATION
TLDR
It is more important to determine the respective roles of geographical and ecological factors in speciation, and to find out whether they operate consecutively or concomitantly, than to consider the role of sympatric speciation. Expand
The speed of ecological speciation.
TLDR
This work explores the possibility that reproductive isolation can evolve on ecological time-scales within dozens of generations, in theory and in nature, and examines few relevant studies. Expand
Interactions among quantitative traits in the course of sympatric speciation
TLDR
The hypergeometric phenotypic model is used to show that sympatric speciation is possible even when fitness and mate choice depend on different quantitative traits, so that speciation must involve formation of covariance between these traits. Expand
Dynamic patterns of adaptive radiation.
  • S. Gavrilets, A. Vose
  • Medicine, Biology
  • Proceedings of the National Academy of Sciences of the United States of America
  • 2005
TLDR
This work builds and explores a large-scale, stochastic, spatially explicit, individual-based model of adaptive radiation driven by adaptation to multidimensional ecological niches, and shows that a great majority of speciation events are concentrated early in the phylogeny. Expand
How do natural and sexual selection contribute to sympatric speciation?
  • S. Gourbière
  • Biology, Medicine
  • Journal of evolutionary biology
  • 2004
I use explicit genetic models to investigate the importance of natural and sexual selection during sympatric speciation and to sort out how genetic architecture influences these processes.Expand
The evolution of reproductive isolation in closely adjacent plant populations through differential flowering time
TLDR
It is suggested that the evolution of reproductive isolation may sometimes start through a selectively neutral process, which can secondarily enhance the adaptation to divergent selection regimes in adjacent plant populations. Expand
...
1
2
3
4
5
...