Projects per year
Abstract
Aim: To examine the population genetic structure in Posidonia australis meadows, a marine foundation species capable of long distance dispersal (LDD), and the role of historical versus contemporary processes in shaping post Last Glacial Maximum (LGM) re-colonization. Location: Southeastern Australia including the Bass Strait Islands. Methods: We generated multilocus genotypes and assessed spatial patterns of genetic diversity. Relationships among meadows were assessed in terms of historical sea level changes, oceanic boundary currents and contemporary seed dispersal based on a hydrodynamic model. Results: There was strong regional spatial genetic structuring among P. australis meadows in south-eastern Australia, which was congruent with three recognized marine biogeographical provinces [Peronian (eastern), Flindersian (western and southern), and Maugean (south-eastern)]. The genetic data suggest Maugean meadows persisted in isolation during the LGM, with evidence for admixture and contemporary gene flow. Simulated dispersal events identified high rates of local and regional demographic connectivity, with evidence for occasional LDD events. Main conclusions: The strong regional differentiation is consistent with long-term barriers to dispersal persisting in the marine environment through many sea level fluctuations. Bass Strait Island meadows all have strong signals of genetic admixture. A weak but significant isolation by distance relationship is consistent with a historical signal and contemporary seed dispersal mostly within the Bass Strait.
Original language | English |
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Pages (from-to) | 2209-2222 |
Number of pages | 14 |
Journal | Journal of Biogeography |
Volume | 43 |
Issue number | 11 |
Early online date | 4 Aug 2016 |
DOIs | |
Publication status | Published - 1 Nov 2016 |
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Dive into the research topics of 'Genetic signatures of Bassian glacial refugia and contemporary connectivity in a marine foundation species'. Together they form a unique fingerprint.Datasets
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Historic and contemporary biogeographic perspectives on range-wide spatial genetic structure in a widespread seagrass
Sinclair, E. A. (Creator), Hovey, R. (Creator), Krauss, S. (Creator), Anthony, J. (Creator), Waycott, M. (Creator) & Kendrick, G. (Creator), DRYAD, 10 Mar 2023
DOI: 10.5061/dryad.kwh70rz4p, https://datadryad.org/stash/dataset/doi:10.5061/dryad.kwh70rz4p and one more link, https://zenodo.org/record/7719793 (show fewer)
Dataset
Projects
- 2 Finished
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Ecological and Genetic Connectivity in Seagrasses: The Role of Sexual Reproduction, Dispersal and Recruitment on Meadow Restoration
Kendrick, G. (Investigator 01), Krauss, S. (Investigator 02) & Lowe, R. (Investigator 03)
ARC Australian Research Council , Botanic Gardens and Parks Authority
1/01/13 → 31/07/16
Project: Research
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Establishing Genetic Guidelines for the Effective Ecological Restoration of Seagrass Meadows
Kendrick, G. (Investigator 01), Krauss, S. (Investigator 02), Dixon, K. (Investigator 03) & Waycott, M. (Investigator 04)
ARC Australian Research Council , Cockburn Cement Ltd, Botanic Gardens and Parks Authority, Department of Water and Environmental Regulation (Western Australia)
30/06/10 → 31/12/13
Project: Research