Samantha M. Howitt

ORCID: 0009-0002-6272-5261
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About
Contact & Profiles
Research Areas
  • Coral and Marine Ecosystems Studies
  • Parasite Biology and Host Interactions
  • Genetic diversity and population structure
  • Marine Ecology and Invasive Species
  • Marine and fisheries research
  • Marine and coastal plant biology
  • Plant and Fungal Species Descriptions

The University of Queensland
2023-2024

Conservation and management of coral reef ecosystems will depend on accurate assessments reef-building species diversity. However, the true diversity corals may be obfuscated by presence cryptic species, which are likely much more pervasive than is currently recognised. Additionally, sometimes hybridize, resulting in gene introgression between species. Here, we investigate prevalence via a structured literature review find that over 50% population genomic studies show evidence for divisions...

10.32942/x2502x preprint EN cc-by-nc-sa 2024-02-14

Understanding the dispersal potential of different species is essential for predicting recovery trajectories following local disturbances and adaptive loci to spread populations facing extreme environmental changes. However, distances have been notoriously difficult estimate scleractinian corals, where sexually (as gametes or larvae) asexually fragments derived propagules disperse through vast oceans. Here, we demonstrate that generational produced can be indirectly inferred corals using...

10.1098/rspb.2023.1988 article EN cc-by Proceedings of the Royal Society B Biological Sciences 2024-07-01

Lewontin's paradox, the observation that levels of genetic diversity (π) do not scale linearly with census population size (Nc) variation, is an evolutionary conundrum. The most extreme mismatches between π and Nc are found for highly abundant marine invertebrates. Yet, influences new mutations on relative to extrinsic processes such as fluctuations unknown. Here, we provide first germline mutation rate (μ) estimate a invertebrate in corallivorous crown-of-thorns sea stars (Acanthaster cf....

10.1371/journal.pgen.1011129 article EN cc-by PLoS Genetics 2024-02-12

The conservation and management of coral reef ecosystems will benefit from accurate assessments reef-building species diversity. However, the true diversity corals may be obfuscated by cryptic yet genetically distinct groups, which are likely more pervasive than currently recognised. Here, we investigate prevalence groups assess evidence for their permeability to gene flow (hybridisation) via a structured literature review genomic studies. Using reproducible criteria detect genetic that...

10.24072/pcjournal.492 article EN cc-by Peer Community Journal 2024-11-14

Abstract Lewontin’s paradox, the observation that levels of genetic diversity (π) among animals do not scale linearly with variation in census population sizes ( N c ), is an evolutionary conundrum, where most extreme mismatches between π and are found for highly abundant marine invertebrates. Yet, whether new mutations influence relative to extrinsic processes remains unknown taxa. Here, we provide first direct germline mutation rate μ ) estimate a invertebrate, using high-coverage (60x)...

10.1101/2023.06.28.546961 preprint EN bioRxiv (Cold Spring Harbor Laboratory) 2023-06-30
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