Incipient allochronic speciation by climatic disruption of the reproductive period

Yamamoto, Satoshi; Sota, Teiji

doi:10.1098/rspb.2009.0349

Cited by 55 publications

(61 citation statements)

References 36 publications

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“…A second mechanism for assortative mating is for different forms to become reproductively active at different times, reproducing in different years [124], at different times of the year [125], or at different times of the day [107,126]. This reduces the likelihood of interspecific mating and permits the continued coexistence of allochronic species.…”

Section: Discussionmentioning

confidence: 99%

Molecular Population Structure ofJunoniaButterflies from French Guiana, Guadeloupe, and Martinique

Gemmell

Borchers

Marcus

2014

Psyche: A Journal of Entomology

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Up to 9 described species of Junonia butterflies occur in the Americas, but authorities disagree due to species similarities, geographical and seasonal variability, and possible hybridization. In dispute is whether Caribbean Junonia are conspecific with South American species. Cytochrome oxidase I (COI) barcodes, wingless (wg) sequences, and Randomly Amplified Fingerprints (RAF) were studied to reveal Junonia population structure in French Guiana, Guadeloupe, Martinique, and Argentina. Phylogenetic analysis of COI recovered 2 haplotype groups, but most Junonia species can have either haplotype, so COI barcodes are ambiguous. Analysis of nuclear wingless alleles revealed geographic patterns but did not identify Junonia species. Nuclear RAF genotyping distinguished 11 populations of Junonia arranged into 3 clusters. Gene flow occurs within clusters but is limited between clusters. One cluster included all Argentinian samples. Two clusters included samples from French Guiana, Martinique, and Guadeloupe and appear to be divided by larval host plant use (Lamiales versus Scrophulariales). Many Junonia taxa were distributed across populations, possibly reflecting patterns of genetic exchange. We had difficulty distinguishing between the Caribbean forms J. zonalis and J. neildi, but we demonstrate that Caribbean Junonia are genetically distinct from South American J. evarete and J. genoveva, supporting the taxonomic hypothesis that they are heterospecific.

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Section: Discussionmentioning

confidence: 99%

Molecular Population Structure ofJunoniaButterflies from French Guiana, Guadeloupe, and Martinique

Gemmell

Borchers

Marcus

2014

Psyche: A Journal of Entomology

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“…Allochronic emergences may be involved in other insects (Cooley et al , 2001; Yamamoto & Sota, 2009; Whipple et al , 2009). Allochronic mating and flight activity has been seen in regard to pheromone release by female Callosamia species silkmoths (Scriber, 1983) and in different host‐associated strains in other moths (Ueno et al , 2006; Schoefl et al , 2009).…”

Section: Host‐associated Divergence (Cryptic Species and Speciation);mentioning

confidence: 99%

Impacts of climate warming on hybrid zone movement: Geographically diffuse and biologically porous “species borders”

Scriber

2010

Insect Science

138

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The ecology and evolutionary biology of insect–plant associations has realized extensive attention, especially during the past 60 years. The classifications (categorical designations) of continuous variation in biodiversity, ranging from global patterns (e.g., latitudinal gradients in species richness/diversity and degree of herbivore feeding specialization) to localized insect–plant associations that span the biospectrum from polyphenisms, polymorphisms, biotypes, demes, host races, to cryptic species, remain academically contentious. Semantic and biosystematic (taxonomical) disagreements sometimes detract from more important ecological and evolutionary processes that drive diversification, the dynamics of gene flow and local extinctions. This review addresses several aspects of insect specialization, host‐associated divergence and ecological (including “hybrid”) speciation, with special reference to the climate warming impacts on species borders of hybridizing swallowtail butterflies (Papilionidae). Interspecific hybrid introgression may result in collapse of multi‐species communities or increase species numbers via homoploid hybrid speciation. We may see diverging, merging, or emerging genotypes across hybrid zones, all part of the ongoing processes of evolution. Molecular analyses of genetic mosaics and genomic dynamics with “divergence hitchhiking”, combined with ecological, ethological and physiological studies of “species porosity”, have already begun to unveil some answers for some important ecological/evolutionary questions. (i) How rapidly can host‐associated divergence lead to new species (and why doesn't it always do so, e.g., resulting in “incomplete” speciation)? (ii) How might “speciation genes” function, and how/where would we find them? (iii) Can oscillations from specialists to generalists and back to specialists help explain global diversity in herbivorous insects? (iv) How could recombinant interspecific hybridization lead to divergence and speciation? From ancient phytochemically defined angiosperm affiliations to recent and very local geographical mosaics, the Papilionidae (swallowtail butterflies) have provided a model for enhanced understanding of ecological patterns and evolutionary processes, including host‐associated genetic divergence, genomic mosaics, genetic hitchhiking and sex‐linked speciation genes. Apparent homoploid hybrid speciation in Papilio appears to have been catalyzed by climate warming‐induced interspecific introgression of some, but not all, species diagnostic traits, reflecting strong divergent selection (discordant), especially on the Z (= X) chromosome. Reproductive isolation of these novel recombinant hybrid genotypes appears to be accomplished via a delayed post‐diapause emergence or temporal isolation, and is perhaps aided by the thermal landscape. Changing thermal landscapes appear to have created (and may destroy) novel recombinant hybrid genotypes and hybrid species.

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“…, 2007; Santos et al. , 2007; Yamamoto & Sota, 2009) or even at different times of the day (Miyatake et al. , 2002).…”

Section: Introductionmentioning

confidence: 99%

Temperature niche shift observed in a Lepidoptera population under allochronic divergence

Santos

Paiva

Tavares

et al. 2011

Journal of Evolutionary Biology

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A process of adaptive divergence for tolerance to high temperatures was identified using a rare model system, consisting of two sympatric populations of a Lepidoptera (Thaumetopoea pityocampa) with different life cycle timings, a ‘mutant’ population with summer larval development, Leiria SP, and the founder natural population, having winter larval development, Leiria WP. A third, allopatric population (Bordeaux WP) was also studied. First and second instar larvae were experimentally exposed to daily‐cycles of heat treatment reaching maximum values of 36, 38, 40 and 42 °C; control groups placed at 25 °C. A lethal temperature effect was only significant at 42 °C, for Leiria SP, whereas all temperatures tested had a significant negative effect upon Leiria WP, thus indicating an upper threshold of survival c.a. 6 °C above that of the WP. Cox regression model, for pooled heat treatments, predicted mortality hazard to increase for Leiria WP (+108%) and Bordeaux WP (+78%) in contrast to Leiria SP; to increase by 24% for each additional °C; and to decrease by 53% from first to second instar larvae. High variability among individuals was observed, a population characteristic that may favour selection and consequent adaptation. Present findings provide an example of ecological differentiation, following a process of allochronic divergence. Results further contribute to a better understanding of the implications of climate change for ecological genetics.

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Incipient allochronic speciation by climatic disruption of the reproductive period

Cited by 55 publications

References 36 publications

Molecular Population Structure ofJunoniaButterflies from French Guiana, Guadeloupe, and Martinique

Molecular Population Structure ofJunoniaButterflies from French Guiana, Guadeloupe, and Martinique

Impacts of climate warming on hybrid zone movement: Geographically diffuse and biologically porous “species borders”

Temperature niche shift observed in a Lepidoptera population under allochronic divergence

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