Spatiotemporal Dynamics of Non‐Ecological Speciation in Rubyspot Damselflies (Hetaerina spp.)

Molecular Ecology, Год журнала: 2025, Номер unknown

Опубликована: Май 15, 2025

ABSTRACT Non‐ecological speciation is a common mode of speciation, which occurs when allopatric lineages diverge in the absence pronounced ecological differences. Yet, relative to other mechanisms, non‐ecological remains understudied. Numerous damselfly clades are characterised as non‐adaptive radiations (the result several rounds without subsequent divergence), but there few for we have detailed understanding spatiotemporal dynamics divergence. Recent phylogeographic analyses demonstrate that American rubyspot damselflies ( Hetaerina americana sensu lato) actually comprise at least two cryptic coexist sympatrically across most Mexico. To broaden our diversification lineages, investigated history smoky titia ) using genomic data collected Central and North America. Unexpectedly, found evidence reproductive isolation between highly genetically differentiated Pacific Atlantic H. narrow secondary contact zone on Isthmus Tehuantepec, We then fit models historical demography both lato place these comparisons temporal context. Our findings indicate split more recently than broadly sympatric within lato, supporting key assumptions model demonstrating pairs sister different stages cycle.

Язык: Английский

Species distribution models predict genetic isolation of Hetaerina vulnerata Hagen in Selys, 1853 (Odonata, Calopterygidae)

Ecology and Evolution, Год журнала: 2024, Номер 14(8)

Опубликована: Авг. 1, 2024

Abstract Understanding how past and current environmental conditions shape the demographic genetic distributions of organisms facilitates our predictions future patterns may affect populations. The Canyon Rubyspot damselfly (Odonata: Zygoptera: Hetaerina vulnerata ) is an insect with a range distribution from Colombia to arid southwestern United States, where it inhabits shaded mountain streams in States. Past spatial fragmentation habitat limited dispersal capacity H. cause population isolation differentiation, projected climate change exacerbate by further restricting species' distribution. We constructed species models (SDMs) based on occurrences variables characterizing niche. inferred seven potential clusters isolated unsuitable habitat. Paleoclimate indicated contiguity conditions; some scenarios. Seventy‐eight individuals six were sequenced via ddRADseq processed Stacks. Principal components phylogeographic analyses resolved three subpopulations; Structure four subpopulations. F ST values low (<0.05) for nearby populations >0.15 separated expanses Isolation distance was existing but weak factor determining genomic structure; environment intervening landscape explained significant proportion distance. shown be lack tree canopy coverage, important predictor oviposition territoriality. Thus, are likely genetically isolated. Integrating SDMs genetics allowed us identify habitat, explaining probable fates under

Язык: Английский

Spatiotemporal dynamics of non-ecological speciation in rubyspot damselflies (Hetaerinaspp.)

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2024, Номер unknown

Опубликована: Дек. 12, 2024

Abstract Non-ecological speciation is a common mode of which occurs when allopatric lineages diverge in the absence pronounced ecological differences. Yet, relative to other mechanisms, non-ecological remains understudied. Numerous damselfly clades are characterized as non-adaptive radiations (the result several rounds speciation), but there few for we have detailed understanding spatiotemporal dynamics divergence. Recent phylogeographic analyses demonstrate that American rubyspot damselflies ( Hetaerina americana sensu lato) actually comprise at least two cryptic coexist sympatrically across most Mexico. To broaden our diversification lineages, investigated history smoky titia ) using genomic data collected Central and North America. Unexpectedly, found evidence reproductive isolation between highly genetically differentiated Pacific Atlantic H. narrow secondary contact zone on Isthmus Tehuantepec, We then fit models historical demography both lato place these comparisons temporal context. Our findings indicate split more recently than broadly sympatric within lato, supporting key assumptions model demonstrating pairs sister different stages cycle.

Язык: Английский