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Population genetic structure of the Australian caddisfly Lectrides varians Mosely (Trichoptera: Leptoceridae) and the identification of cryptic species in south-eastern Australia

Wickson, S. J., Chester, E. T., Valenzuela, I., Halliday, B., Lester, R. E., Matthews, T. G. and Miller, A. D. 2014, Population genetic structure of the Australian caddisfly Lectrides varians Mosely (Trichoptera: Leptoceridae) and the identification of cryptic species in south-eastern Australia, Journal of insect conservation, vol. 18, no. 6, pp. 1037-1046, doi: 10.1007/s10841-014-9711-z.

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Title Population genetic structure of the Australian caddisfly Lectrides varians Mosely (Trichoptera: Leptoceridae) and the identification of cryptic species in south-eastern Australia
Author(s) Wickson, S. J.
Chester, E. T.
Valenzuela, I.
Halliday, B.
Lester, R. E.
Matthews, T. G.
Miller, A. D.ORCID iD for Miller, A. D. orcid.org/0000-0002-1632-7206
Journal name Journal of insect conservation
Volume number 18
Issue number 6
Start page 1037
End page 1046
Total pages 10
Publisher Springer
Place of publication Berlin, Germany
Publication date 2014-12
ISSN 1366-638X
Keyword(s) Cryptic species
Lectrides varians taxonomy
Mitochondrial DNA
Morphometrics
Phylogenetics
Population genetics
Science & Technology
Life Sciences & Biomedicine
Biodiversity Conservation
Entomology
Biodiversity & Conservation
NON-PERENNIAL STREAMS
SOUTHEASTERN AUSTRALIA
DROUGHT REFUGES
FRESH-WATER
FLOW
DNA
INVERTEBRATES
RECRUITMENT
ADAPTATION
TASIMIIDAE
Summary Lectrides varians (Mosely) is a large, ecologically-important, caddisfly found in perennial and intermittent streams throughout much of eastern Australia. We conducted a population genetic analysis to investigate the dispersal potential of L. varians, building on previous works that have assessed life-history traits associated with drought resistance. Genetic analyses of L. varians from the Grampians region of Victoria, based on mitochondrial DNA sequence data, revealed extensive gene flow and a lack of genetic structure across the sample range (ΦST = 0.04). This suggests that the species is a strong disperser and is likely to be resilient to increased drying and habitat fragmentation under climate change considering other known resistance traits. However, during this study, two divergent genotypes were identified, indicating a potential species complex. A comprehensive phylogenetic analysis of L. varians across its current range was subsequently performed, confirming the species is indeed paraphyletic, consisting of one lineage that is restricted to the Grampians National Park and the other being widespread throughout south-eastern Australia. Further analyses revealed consistent morphological differences between these lineages supporting the notion that L. varians is a species complex. We discuss the implications of these findings with regard to conservation and taxonomy of this important invertebrate group.
Language eng
DOI 10.1007/s10841-014-9711-z
Field of Research 060411 Population, Ecological and Evolutionary Genetics
Socio Economic Objective 970105 Expanding Knowledge in the Environmental Sciences
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2014, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30072264

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