Incipient Speciation of Sea Star Populations by Adaptive Gamete Recognition Coevolution

Hart, Michael W.; Sunday, Jennifer M.; Popovic, Iva; Learning, Kevin J.; Konrad, Christine M.

doi:10.1111/evo.12352

Cited by 30 publications

(54 citation statements)

References 74 publications

(144 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Prezygotic barriers have been widely documented in other echinoderms, especially for echinoids, including examples on habitat separation between species but also on gametic isolation due to the evolution of molecules involved in gamete recognition e.g. refs 32 and 33.…”

Section: Discussionmentioning

confidence: 99%

Contrasted phylogeographic patterns on mitochondrial DNA of shallow and deep brittle stars across the Atlantic-Mediterranean area

Taboada

Pérez‐Portela

2016

Sci Rep

View full text Add to dashboard Cite

Previous studies on Ophiothrix in European waters demonstrated the existence of two distinct species, Ophiothrix fragilis and Ophiothrix sp. II. Using phylogenetic and species delimitation techniques based on two mitochondrial genes (cytochrome c oxidase I and 16S rRNA) we prove the existence of a new congeneric species (Ophiothrix sp. III), occurring in the deep Atlantic coast of the Iberian Peninsula and the Alboran Sea. We compared phylogeographic patterns of these three Ophiothrix species to test whether closely related species are differentially affected by past demographic events and current oceanographic barriers. We used 432 sequences (137 of O. fragilis, 215 of Ophiothrix sp. II, and 80 of Ophiothrix sp. III) of the 16S rRNA from 23 Atlantic-Mediterranean locations for the analyses. We observed different geographic and bathymetric distributions, and contrasted phylogeography among species. Ophiothrix fragilis appeared genetically isolated between the Atlantic and Mediterranean basins, attributed to past vicariance during Pleistocene glaciations and a secondary contact associated to demographic expansion. This contrasts with the panmixia observed in Ophiothrix sp. II across the Atlantic-Mediterranean area. Results were not conclusive for Ophiothrix sp. III due to the lack of a more complete sampling within the Mediterranean Sea.

show abstract

Section: Discussionmentioning

confidence: 99%

Contrasted phylogeographic patterns on mitochondrial DNA of shallow and deep brittle stars across the Atlantic-Mediterranean area

Taboada

Pérez‐Portela

2016

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Data is accumulating on the fitness consequences of intraspecific variation in sperm GRPs (Palumbi , Levitan and Ferrell ; Levitan and Stapper ; Levitan ; Hart et al. ). However there is scant data on the functional significance of intraspecific variation in egg GRPs and how sperm and egg GRPs interact to influence fertilization success (but see Hart et al.…”

Section: Primers Used To Generate Ebr1 Sequencesmentioning

confidence: 99%

“…However there is scant data on the functional significance of intraspecific variation in egg GRPs and how sperm and egg GRPs interact to influence fertilization success (but see Hart et al. for an example in sea stars).…”

Section: Primers Used To Generate Ebr1 Sequencesmentioning

confidence: 99%

The evolution of gametic compatibility and compatibility groups in the sea urchin Mesocentrotus franciscanus : An avenue for speciation in the sea

2019

View full text Add to dashboard Cite

The generation of reproductive incompatibility between groups requires a rare genotype with low compatibility to increase in frequency. We tested the hypothesis that sexual conflict driven by the risk of polyspermy can generate compatibility groups in gamete recognition proteins (GRPs) in the sea urchin Mesocentrotus franciscanus. We examined variation in the sperm (bindin) and egg (EBR1) GRPs, how this variation influences fertilization success and how allele frequencies shift in these GRPs over time. The EBR1 gene is a large, 4595 amino acid protein made up of 27 thrombospondin type 1 domain (TSP) and 20 C1s/C1r, uEGF and bone morphogenic protein subdomain (CUB) repeats. Two TSP and two CUB repeats each demonstrate two common non‐synonymous haplotypes (alleles). Sperm bindin and one of these EBR1 repeats (TSP8) shift allele frequencies from one common to two common types over an approximate 200 year interval associated with the removal of predatory sea otters and rising sea urchin abundances; the egg receptor shifts first, followed by the sperm ligand. Laboratory crosses indicate that the historically common sperm and egg gamete recognition proteins have high compatibility as do the new common proteins, with mismatches having lower compatibility. This process of creating compatibility groups sets the stage for reproductive isolation and speciation.

show abstract

“…There are several examples from broadcast spawners and flowering plants of coevolution between male-female gamete recognition proteins causing assortative mating (Howard 1999;Van Doorn et al 2001;Swanson and Vacquier 2002;Clark et al 2009;Palumbi 2009;Hart et al 2014;Moyle et al 2014). Divergence in gamete recognition proteins can result in gametes of immigrants not being recognized by gametes of residents.…”

mentioning

confidence: 99%

Immigrant reproductive dysfunction facilitates ecological speciation

et al. 2017

View full text Add to dashboard Cite

The distributions of species are not only determined by where they can survive - they must also be able to reproduce. Although immigrant inviability is a well-established concept, the fact that immigrants also need to be able to effectively reproduce in foreign environments has not been fully appreciated in the study of adaptive divergence and speciation. Fertilization and reproduction are sensitive life-history stages that could be detrimentally affected for immigrants in non-native habitats. We propose that "immigrant reproductive dysfunction" is a hitherto overlooked aspect of reproductive isolation caused by natural selection on immigrants. This idea is supported by results from experiments on an externally fertilizing fish (sand goby, Pomatoschistus minutus). Growth and condition of adults were not affected by non-native salinity whereas males spawning as immigrants had lower sperm motility and hatching success than residents. We interpret these results as evidence for local adaptation or acclimation of sperm, and possibly also components of paternal care. The resulting loss in fitness, which we call "immigrant reproductive dysfunction," has the potential to reduce gene flow between populations with locally adapted reproduction, and it may play a role in species distributions and speciation.

show abstract

Incipient Speciation of Sea Star Populations by Adaptive Gamete Recognition Coevolution

Cited by 30 publications

References 74 publications

Contrasted phylogeographic patterns on mitochondrial DNA of shallow and deep brittle stars across the Atlantic-Mediterranean area

Contrasted phylogeographic patterns on mitochondrial DNA of shallow and deep brittle stars across the Atlantic-Mediterranean area

The evolution of gametic compatibility and compatibility groups in the sea urchin Mesocentrotus franciscanus : An avenue for speciation in the sea

Immigrant reproductive dysfunction facilitates ecological speciation

Contact Info

Product

Resources

About