Group leader at the Swedish Museum of Natural History
I am an evolutionary naturalist focusing on island biology, adaptive radiation, genomes and ecological niches.
Islandevolution.github.io
José Cerca
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A big preprint from my group!
Muller Elements are considered to be conserved in flies. We tested it by reconstructing the ancestral dipteran karyotype using 340 chromosomal genomes and suprise suprise, they're not...
Led by @juliagries.bsky.social and Sam Ebdon. www.biorxiv.org/content/10.6...
🧵👇
In contrast, “diversification” addresses broader, macro-scale phenomena, including phylogenetics, the long-term cessation of gene flow, and the accumulation of divergence and differentiation over time.
/thread over :)
4) We emphasize that “speciation” is concerned with species formation and reproductive isolation. Speciation should (must?) be studied in sympatry to mitigate confounding factors between reproductive isolation and geographic context. (...)
3) We argue that an excessive focus on genomic data and associated concepts (divergence and gene flow) has shifted attention away from the core objective of speciation: understanding reproductive isolation (we argue that gene flow and divergence do not, necessarily reflect reproductive isolation).
2) Incidentally, we reveal that this dominance of genomic data has led to an overreliance on genomic concepts and metrics in speciation research. 🔍
