Holocene Climate Change Promoted Allopatric Divergence and Disjunct Geographic Distribution in a Bee Orchid Species

Journal of Biogeography, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 2, 2024

ABSTRACT Aim Species with disjunct geographic distributions provide natural opportunities to investigate incipient or recent allopatric divergence. The combination of both genetic and ecological data may be fruitful decipher the causes such patterns: (i) actual vicariance, (ii) successful colonisation from one source a new range (dispersal, biological introduction) (iii) parallel convergent evolution. Location Southern France Northern Spain. Taxon bee orchid Ophrys aveyronensis (and its two recognised subspecies O. a. subsp. vitorica ) displays distribution subranges separated by 600 km on sides Pyrenees mountain range. Methods As divergence is often complex document in wild, we used population genomics niche modelling (ENM) this intriguing biogeographic pattern. Results genomic demonstrate that all studied populations exhibit similar patterns diversity dramatic decrease effective size compared ancestral population. Significant differentiation reciprocal monophyly exist between , despite very time as young ca. 1500 generations ago. Moreover, paleo‐ENM analyses support consistent split broad range, contraction distinct longitudinal latitudinal shifts response climate warming during Holocene. Main Conclusion congruence results obtained ENM approaches documents how continental initiated speciation system. provides promising opportunity study onset reproductive isolation evolution following an initial stage separation group high diversification rate.

Language: Английский

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Climatic Niche Conservatism and Ecological Diversification in the Holarctic Cold-Dwelling Butterfly GenusErebia

Insect Systematics and Diversity, Journal Year: 2023, Volume and Issue: 7(1)

Published: Jan. 1, 2023

Abstract The diversification of alpine species has been modulated by their climatic niches interacting with changing conditions. relative roles niche conservatism promoting geographical speciation and are poorly understood in diverse temperate groups. Here, we investigate the evolution a rich butterfly genus, Erebia (Dalman, 1816). This Holarctic cold-dwelling genus reaches highest diversity European mountains. We generated nearly complete molecular phylogeny modeled using geo-referenced occurrence records. reconstructed tested how species’ width changes across occupied climate gradient compared two main clades, Asian clade. further explored overlaps among species. Our analyses revealed that shaped conservatism, supported strong phylogenetic signal overlap sister species, likely allopatric speciation. clades evolved toward different local optima. In addition, clade have narrower to Contrasts may be related regional differences, lower seasonality Europe Central Asia favoring niches. Further, adaptive divergence could appear other traits, such as habitat use, which can reflected detected study extends knowledge about complexity evolutionary drivers insects.

Language: Английский

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Geography of Indian Butterflies: Patterns Revealed by Checklists of Federal States

Insects, Journal Year: 2023, Volume and Issue: 14(6), P. 549 - 549

Published: June 13, 2023

Butterflies are widely used to analyze biogeographical patterns, both at the global and regional scales. Thus far, most of latter originated from well-surveyed northern regions, while species-rich tropical areas lag due a lack appropriate data. We checklists 1379 butterfly species recorded in 36 federal states Republic India (1) explore basic macroecological rules, (2) relate richness distribution endemics geographic elements geography, climate, land covers socioeconomic conditions states. The area, diversity latitude did not affect richness, whereas topographic precipitation/temperature ratio (energy availability) were positive predictors. This is climatic idiosyncrasies Indian subcontinent, with its highest small, densely forested mountainous northeast that receives summer monsoons. peninsular effect decreases towards tip subcontinent counterbalanced by Western Ghats. Afrotropical associated savannahs, Palearctic treeless habitats. bulk conservation priorities, overlap biodiversity hotspots, but Himalayas savannah host distinctive faunas.

Language: Английский

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Phylogenomic inference and demographic model selection suggest peripatric separation of the cryptic steppe ant species Plagiolepis pyrenaica stat. rev.

Molecular Ecology, Journal Year: 2022, Volume and Issue: 32(5), P. 1149 - 1168

Published: Dec. 19, 2022

Abstract The ant Plagiolepis taurica Santschi, 1920 (Hymenoptera, Formicidae) is a typical species of the Eurasian steppes, large grassland dominated biome that stretches continuously from Central Asia to Eastern Europe and represented by disjunct outposts also in Western Europe. extent this has been influenced Pleistocene climate, steppes expanded recurrently during cold stages contracted warm stages. Consequently, stenotopic steppe such as P . repeatedly went through periods demographic expansion severe isolation. Here, we explore impact these dynamics on genetic diversification within taurica. Delimitation other unclear since its initial description, which raised questions both classification spatiotemporal early on. We re‐evaluate limits underlying mechanisms driving speciation using an integrative approach based genomic morphometric data. found intraspecific divergence resolved geographically coherent western eastern groups, likewise differed morphologically. A survey type material showed group were more similar P. barbara pyrenaica Emery, 1921 than ; thus lift former synonymy establish it separate species, stat. rev. Explicit evolutionary model testing data supported peripatric for pair, probably consequence contraction isolation mid‐Pleistocene. speculate scenario could be exemplary many given emphasized steppes.

Language: Английский

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Phylogenetic structure and molecular species delimitation hint a complex evolutionary history in an Alpine endemic Niphargus clade (Crustacea, Amphipoda)

Zoologischer Anzeiger, Journal Year: 2023, Volume and Issue: 306, P. 27 - 36

Published: July 7, 2023

Subterranean fauna is an important contributor to the global fauna, but it still understudied and a large part of its taxonomy not yet resolved. One species complex with unresolved groundwater amphipod Niphargus ruffoi, endemic Alpine chain. Here, we used new samples from across arc review taxonomic status entire clade, including N. ruffoi arolaensis. We sequenced four genetic markers collected specimens, assessed phylogenetic position within genus, studied structure this using molecular delimitation methods. tested for recombination alignments concatenated nuclear rDNA genes. The analyses revealed high support monophyly complex, defining two lineages (i.e., arolaensis ruffoi) clade. Molecular methods suggested that single species, while should be considered as three (using ITS) eight COI) putative species. Moreover, found discrepancy between different ribosomal DNA markers, indicating possible fragments 28S s. lat. present in genome For above-mentioned reasons, internal could fully no clear morphological evidence supported delimitation. Consequently, changes were proposed. postulate scenario was influenced by Pleistocene climate oscillations subsequent fragmentation events secondary contacts, making interesting study system investigate evolution biogeography clades.

Language: Английский

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Spatial gradients and grazing effects of a transhumant herd on plants and insect herbivores in Pyrenean subalpine grasslands

Journal of Insect Conservation, Journal Year: 2023, Volume and Issue: 27(5), P. 767 - 779

Published: July 25, 2023

Language: Английский

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A chromosome-level, haplotype-resolved genome assembly and annotation for the Eurasian minnow (Leuciscidae: Phoxinus phoxinus) provide evidence of haplotype diversity

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: Dec. 1, 2023

In this study we present an in-depth analysis of the Eurasian minnow (Phoxinus phoxinus) genome, highlighting its genetic diversity, structural variations, and evolutionary adaptations. We generated annotated haplotype-phased, chromosome-level genome assembly (2n = 50) by integrating high-fidelity (HiFi) long reads chromosome conformation capture data (Hi-C). achieved a haploid size 940 Megabase pairs (Mbp) for haplome one 929 Mbp two with high scaffold N50 values 36.4 Mb 36.6 BUSCO scores 96.9% 97.2%, respectively, indicating highly complete assembly. detected notable heterozygosity (1.43%) repeat content (approximately 54%), primarily consisting DNA transposons, which contribute to rearrangements variations. found substantial variations within including insertions, deletions, inversions, translocations. These affect genes enriched in functions such as dephosphorylation, developmental pigmentation, phagocytosis, immunity, stress response. annotation protein-coding genes, 30,980 mRNAs 23,497 were identified completeness score, further underpins contiguity our assemblies. performed gene family evolution comparing proteome ten other teleost species, immune system families that prioritise histone-based disease prevention over NLR-based responses. Additionally, demographic indicates historical fluctuations effective population P. phoxinus, likely correlating past climatic changes. This annotated, phased reference provides crucial resource resolving taxonomic complexity genus Phoxinus highlights importance haplotype-phased assemblies understanding haplotype diversity species characterised heterozygosity.

Language: Английский

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Inter and intra-specific relationship between goat fishes Upeneus vittatus (Forsskal, 1775) and Upeneus tragula based on their mtCOI gene from Palk Bay and Gulf of Mannar Coast (Mandapam, Tamil Nadu) of India

Gene Reports, Journal Year: 2022, Volume and Issue: 30, P. 101713 - 101713

Published: Nov. 24, 2022

Language: Английский

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Climatic niche conservatism and ecological diversification in the Holarctic cold-dwelling butterfly genusErebia

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2022, Volume and Issue: unknown

Published: April 13, 2022

ABSTRACT The diversification of alpine species has been modulated by their climatic niches interacting with changing conditions. relative roles niche conservatism promoting geographical speciation and are poorly understood in diverse temperate groups. Here, we investigate the evolution a rich butterfly genus, Erebia . This Holarctic cold-dwelling genus reaches highest diversity European mountains. We generated nearly complete molecular phylogeny modelled using geo-referenced occurrence records. reconstructed tested how species’ width changes across occupied climate gradient compared two main clades, Asian clade. further explored overlaps among species. Our analyses revealed that shaped conservatism, supported strong phylogenetic signal overlap sister species, likely allopatric speciation. clades evolved toward different local optima. In addition, clade have narrower to Contrasts may be related regional differences, lower seasonality Europe Central Asia favouring niches. Further, adaptive divergence could appear other traits, such as habitat use, which can reflected detected conclusion, our study extends knowledge about complexity evolutionary drivers insects.

Language: Английский

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