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Gut microbiota in two recently diverged passerine species: evaluating the effects of species identity, habitat use and geographic distance

ABSTRACT: Gut microbiota in two recently diverged passerine species: evaluating the effects of species identity, habitat use and geographic distance

PROVIDER: PRJEB43057 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR5284730_1.fastq.gz	Fastqsanger.gz
	ERR5284730_2.fastq.gz	Fastqsanger.gz
	ERR5284740_1.fastq.gz	Fastqsanger.gz
	ERR5284740_2.fastq.gz	Fastqsanger.gz
	ERR5284750_1.fastq.gz	Fastqsanger.gz

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Gut microbiota in two recently diverged passerine species: evaluating the effects of species identity, habitat use and geographic distance.

Project description:BackgroundIt has been proposed that divergence in the gut microbiota composition between incipient species could contribute to their reproductive isolation. Nevertheless, empirical evidence for the role of gut microbiota in speciation is scarce. Moreover, it is still largely unknown to what extent closely related species in the early stages of speciation differ in their gut microbiota composition, especially in non-mammalian taxa, and which factors drive the divergence. Here we analysed the gut microbiota in two closely related passerine species, the common nightingale (Luscinia megarhynchos) and the thrush nightingale (Luscinia luscinia). The ranges of these two species overlap in a secondary contact zone, where both species occasionally hybridize and where interspecific competition has resulted in habitat use differentiation.ResultsWe analysed the gut microbiota from the proximal, middle and distal part of the small intestine in both sympatric and allopatric populations of the two nightingale species using sequencing of bacterial 16S rRNA. We found small but significant differences in the microbiota composition among the three gut sections. However, the gut microbiota composition in the two nightingale species did not differ significantly between either sympatric or allopatric populations. Most of the observed variation in the gut microbiota composition was explained by inter-individual differences.ConclusionsTo our knowledge, this is the first attempt to assess the potential role of the gut microbiota in bird speciation. Our results suggest that neither habitat use, nor geographical distance, nor species identity have strong influence on the nightingale gut microbiota composition. This suggests that changes in the gut microbiota composition are unlikely to contribute to reproductive isolation in these passerine birds.

| S-EPMC7948333 | biostudies-literature

Evolution of sex-dependent gene expression in three recently diverged species of Drosophila

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Evolution of sex-dependent gene expression in three recently diverged species of Drosophila

Project description:To identify the transcriptome divergence and sex roles underlying it in recently diverged Drosophia pseudoobscura group, we compare the global gene expression of 7-day-old whole body adults of pure species. 7-day-old virgin flies were assayed by species and sex. At least three isofemale inbred lines were used for each species (D. pseudoobscura; D. persimilis; D. pseudoobscura bogotana).All lines of each species were pooled in equal amounts.Two separate labeling reactions per sample were pooled and hybridized to the Agilent single color (Cyanine 3-CTP dye) arrays. Three different replicates were hybridized for each species and sex.

2010-05-16 | E-GEOD-17192 | biostudies-arrayexpress

Sperm and seminal fluids proteomes in selected passerine bird species

Project description:This project contains sperm and seminal fluids proteomes from selected species of passerine birds: Taeniopygia guttata, Hirundo rustica, Chloris chloris, Acrocephalus palustris, Cinclus cinclus, Phylloscopus collybita. We employed label-free proteomics to generate proteomes in the zebra finch, a songbird species with annotated genome and five wild-living songbirds representing five families within the Passerida clade, all with poorly known genomes. The results show that protein mapping of the new passerine proteomes to zebra finch genome was successful, thus, yielding highly similar protein identifications and a sufficient number of unique peptides in all the studied proteomes.

2025-06-02 | PXD042116 | Pride

Growth-defense trade-offs promote habitat isolation between recently-diverged species.

Project description:Trade-offs are crucial for species divergence and reproductive isolation. Trade-offs between investment in growth versus defense against herbivores are implicated in tropical forest diversity. Empirically exploring the role of growth-defense trade-offs in closely related species' reproductive isolation can clarify the eco-evolutionary dynamics through which growth-defense trade-offs contribute to diversity. Costus villosissimus and C. allenii are recently diverged, interfertile, and partially sympatric neotropical understory plant species primarily isolated by divergent habitat adaptation. This divergent adaptation involves differences in growth rate, which may constrain investment in defense. Here, we investigate growth-defense trade-offs and how they relate to the divergent habitat adaptation that isolates these species. We characterize leaf toughness and chemistry, evaluate the feeding preferences of primary beetle herbivores in controlled trials and field-based experiments, and investigate natural herbivory patterns. We find clear trade-offs between growth and defense: slower-growing C. allenii has tougher leaves and higher defensive chemical concentrations than faster-growing C. villosissimus. Costus villosissimus has rapid growth-based drought avoidance, enabling growth in drier habitats with few specialist herbivores. Therefore, growth-defense trade-offs mediate synergistic biotic and abiotic selection, causing the divergent habitat adaptation that prevents most interspecific mating between C. villosissimus and C. allenii. Our findings advance understanding of ecological speciation by highlighting the interplay of biotic and abiotic selection that dictates the outcome of trade-offs.

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Molecular Diversification of the Seminal Fluid Proteome in a Recently Diverged Passerine Species Pair.

Project description:Seminal fluid proteins (SFPs) mediate an array of postmating reproductive processes that influence fertilization and fertility. As such, it is widely held that SFPs may contribute to postmating, prezygotic reproductive barriers between closely related taxa. We investigated seminal fluid (SF) diversification in a recently diverged passerine species pair (Passer domesticus and Passer hispaniolensis) using a combination of proteomic and comparative evolutionary genomic approaches. First, we characterized and compared the SF proteome of the two species, revealing consistencies with known aspects of SFP biology and function in other taxa, including the presence and diversification of proteins involved in immunity and sperm maturation. Second, using whole-genome resequencing data, we assessed patterns of genomic differentiation between house and Spanish sparrows. These analyses detected divergent selection on immunity-related SF genes and positive selective sweeps in regions containing a number of SF genes that also exhibited protein abundance diversification between species. Finally, we analyzed the molecular evolution of SFPs across 11 passerine species and found a significantly higher rate of positive selection in SFPs compared with the rest of the genome, as well as significant enrichments for functional pathways related to immunity in the set of positively selected SF genes. Our results suggest that selection on immunity pathways is an important determinant of passerine SF composition and evolution. Assessing the role of immunity genes in speciation in other recently diverged taxa should be prioritized given the potential role for immunity-related proteins in reproductive incompatibilities in Passer sparrows.

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Sperm morphology and performance in relation to postmating prezygotic isolation in two recently diverged passerine species.

Project description:Divergence in sperm phenotype and female reproductive environment may be a common source of postmating prezygotic (PMPZ) isolation between species. However, compared to other reproductive barriers it has received much less attention. In this study, we examined sperm morphology and velocity in two hybridizing passerine species, the common nightingale (Luscinia megarhynchos) and thrush nightingale (L. luscinia). In addition, we for the first time characterized a passerine female reproductive tract fluid proteome. We demonstrate that spermatozoa of the common nightingale have significantly longer and wider midpiece (proximal part of the flagellum containing mitochondria) and longer tail compared to spermatozoa of thrush nightingale. On the other hand, they have significantly shorter and narrower acrosome. Importantly, these differences did not have any effect on sperm velocity. Furthermore, the fluid from the reproductive tract of common nightingale females did not differentially affect velocity of conspecific and heterospecific sperm. Our results indicate that the observed changes in the flagellum and acrosome size are unlikely to contribute to PMPZ isolation through differential sperm velocity of conspecific and heterospecific sperm in the female reproductive tract. However, they could affect other postcopulatory processes, which might be involved in PMPZ isolation, such as sperm storage, longevity or sperm-egg interaction.

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Evolution of sex-dependent gene expression in three recently diverged species of Drosophila

Project description:Evolution of sex-dependent gene expression in three recently diverged species of Drosophila

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Sperm morphology and performance in relation to postmating prezygotic isolation in two recently diverged passerine species

Project description:Proteomes of female cloacal fluids in Common nightingales, Luscinia megarhynchos.

2023-02-17 | PXD036878 | Pride