Molecular Phylogenetics of Subterranean Fauna

Summary

Molecular phylogenetics has transformed our understanding of stygofaunal evolution by revealing hidden diversity, ancient lineages and the biogeographic processes that shape subterranean communities. Employing mitochondrial and nuclear markers such as cytochrome oxidase I and ribosomal RNA genes, researchers reconstruct evolutionary trees to uncover cryptic speciation in isopods, copepods, crustaceans and insects inhabiting karst aquifers and calcrete springs. Multilocus approaches and coalescent models estimate divergence times often extending to the Miocene or earlier, while transcriptomic analyses detect adaptive shifts under purifying and positive selection. These insights delineate patterns of allopatric, sympatric and microallopatric diversification within isolated aquifers and identify evolutionary significant units for conservation. Advances in high-throughput sequencing and statistical phylogenetics continue to refine temporal frameworks and inform strategies for safeguarding unique subterranean biodiversity worldwide.

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Molecular Phylogenetics of Subterranean Fauna publication trend

The graph below shows the total number of articles in molecular phylogenetics of subterranean fauna across all publications each year (not limited to Nature Index journals).

Technical terms

Molecular phylogenetics: Use of DNA or protein sequence data to infer evolutionary relationships among organisms.

Stygofauna: Aquatic animals specialised for life in subterranean groundwater systems.

Phylogeography: Study of historical processes shaping the geographic distribution of genetic lineages.

Coalescent time: Estimated time at which gene copies share their most recent common ancestor.

Purifying selection: Evolutionary force removing deleterious mutations to preserve functional genes.

References

  1. Evolution of endoglucanase genes in subterranean and surface isopod crustaceans from Central Western Australia. Ecology and Evolution (2023).
  2. Desert Springs: Deep Phylogeographic Structure in an Ancient Endemic Crustacean (Phreatomerus latipes). PLOS ONE (2012).
  3. Evolution of Blind Beetles in Isolated Aquifers: A Test of Alternative Modes of Speciation. PLOS ONE (2012).
  4. Identifying cryptic speciation across groundwater populations: first COI sequences of Bathynellidae (Crustacea, Syncarida). Graellsia (2011).

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