Data

Population genetics of temperate subtidal seagrass beds in Tayaritja Sea Country (Furneaux Group of Islands), Lutruwita (Tasmania) (NESP MaC 3.6)

University of Tasmania, Australia
Sherman, Craig ; Lucieer, Vanessa ; Ellis, Megan
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.25959/8AYC-XE17&rft.title=Population genetics of temperate subtidal seagrass beds in Tayaritja Sea Country (Furneaux Group of Islands), Lutruwita (Tasmania) (NESP MaC 3.6)&rft.identifier=10.25959/8AYC-XE17&rft.description=Seagrass beds are a dominant marine ecosystem of Tayaritja (the Furneaux Group of Islands) in the north-eastern waters off Tasmania. Historical coarse mapping has indicated extensive beds of Posidonia, Amphibolis, Heterozostera, and Zostera species, potentially comprising some of the largest and deepest seagrass extents found in temperate Australian waters. However, limited data on the distribution and ecological value of these seagrass habitats represents a significant knowledge gap in understanding Australia's wetland natural assets.This project mapped the extent, ecological composition, population structure, and blue carbon value of seagrass beds around Tayaritja, in partnership with the Tasmanian Aboriginal Centre. This record specifically describes the seagrass population genetics component of the project.Leaf tissue samples were collected from four seagrass species: Amphibolis antarctica, Heterozostera nigricaulis, Posidonia australis and Zostera muelleri. Samples were collected from multiple sites around Tayaritja Sea Country and processed for genome-wide SNP genotyping using the DArTseq platform. The dataset includes population-level genetic summary statistics, associated DArT metadata and reports, and raw sequence data used to support assessment of genetic diversity, clonality, population structure and connectivity among sampled seagrass populations.See the Lineage section of this record for full methodology.***EMBARGO NOTE*** Data is currently embargoed until 31/12/2026. Please contact the NESP Data Wrangler (Southern node) to discuss access options: [email protected] and Update Frequency: notPlannedStatement: Leaf tissue samples were collected for genetic analysis from seagrass beds in Tayaritja Sea Country, Flinders Island. Sampling targeted four seagrass species: Amphibolis antarctica, Heterozostera nigricaulis, Posidonia australis and Zostera muelleri. Samples were collected from eight different sites, with 15-25 replicate leaf samples collected within each sampled population. Sampling was undertaken across an approximately 20 m x 20 m area at each site, with a minimum distance of 2 m between samples to reduce the likelihood of repeatedly sampling the same ramet. A subset of samples was selected for DNA extraction and SNP genotyping by Diversity Arrays Technologies Pty Ltd using the DArTseq platform. The resulting SNP data were filtered and analysed in R to assess genetic diversity, clonality and population structure. Multilocus genotypes were identified for each sampled population, and clonal richness was calculated to indicate the proportion of sampled individuals represented by unique genotypes. Population-level summary statistics were derived for each species and sampled population, including numbers of sampled individuals, multilocus genotypes, clonal richness, loci, polymorphic loci, percentage polymorphic loci, observed and expected heterozygosity, inbreeding coefficient and levels of genetic differentiation among populations for each species (global FST). This record provides access to the population-level genetics summary data, DArT metadata and report outputs, and raw sequence data. 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R. (2026). Population genetics of temperate subtidal seagrass beds in Tayaritja Sea Country (Furneaux Group of Islands), Lutruwita (Tasmania) [Dataset]. Institute for Marine and Antarctic Studies. https://doi.org/10.25959/8AYC-XE17&rft_subject=biota&rft_subject=National Environmental Science Program (NESP) Marine and Coastal Hub&rft_subject=BENTHIC&rft_subject=MARINE ECOSYSTEMS&rft_subject=SEAGRASS&rft_subject=POPULATION DYNAMICS&rft_subject=COMMUNITY STRUCTURE&rft_subject=Amphibolis antarctica&rft_subject=Posidonia australis&rft_subject=Heterozostera nigricaulis&rft_subject=Zostera muelleri&rft.type=dataset&rft.language=English Access the data

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Open Licence view details
CC-BY

Creative Commons Attribution 4.0 International License
http://creativecommons.org/licenses/by/4.0/

This dataset is hosted by the Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, on behalf of NESP Marine and Coastal Hub Project 3.6.

Cite data as: Sherman, C., Lucieer, V., & Ellis, M. R. (2026). Population genetics of temperate subtidal seagrass beds in Tayaritja Sea Country (Furneaux Group of Islands), Lutruwita (Tasmania) [Dataset]. Institute for Marine and Antarctic Studies. https://doi.org/10.25959/8AYC-XE17

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Full description

Seagrass beds are a dominant marine ecosystem of Tayaritja (the Furneaux Group of Islands) in the north-eastern waters off Tasmania. Historical coarse mapping has indicated extensive beds of Posidonia, Amphibolis, Heterozostera, and Zostera species, potentially comprising some of the largest and deepest seagrass extents found in temperate Australian waters. However, limited data on the distribution and ecological value of these seagrass habitats represents a significant knowledge gap in understanding Australia's wetland natural assets.

This project mapped the extent, ecological composition, population structure, and blue carbon value of seagrass beds around Tayaritja, in partnership with the Tasmanian Aboriginal Centre. This record specifically describes the seagrass population genetics component of the project.

Leaf tissue samples were collected from four seagrass species: Amphibolis antarctica, Heterozostera nigricaulis, Posidonia australis and Zostera muelleri. Samples were collected from multiple sites around Tayaritja Sea Country and processed for genome-wide SNP genotyping using the DArTseq platform. The dataset includes population-level genetic summary statistics, associated DArT metadata and reports, and raw sequence data used to support assessment of genetic diversity, clonality, population structure and connectivity among sampled seagrass populations.

See the "Lineage" section of this record for full methodology.

***EMBARGO NOTE*** Data is currently embargoed until 31/12/2026. Please contact the NESP Data Wrangler (Southern node) to discuss access options: [email protected]

Lineage

Maintenance and Update Frequency: notPlanned
Statement: Leaf tissue samples were collected for genetic analysis from seagrass beds in Tayaritja Sea Country, Flinders Island. Sampling targeted four seagrass species: Amphibolis antarctica, Heterozostera nigricaulis, Posidonia australis and Zostera muelleri. Samples were collected from eight different sites, with 15-25 replicate leaf samples collected within each sampled population. Sampling was undertaken across an approximately 20 m x 20 m area at each site, with a minimum distance of 2 m between samples to reduce the likelihood of repeatedly sampling the same ramet. A subset of samples was selected for DNA extraction and SNP genotyping by Diversity Arrays Technologies Pty Ltd using the DArTseq platform. The resulting SNP data were filtered and analysed in R to assess genetic diversity, clonality and population structure. Multilocus genotypes were identified for each sampled population, and clonal richness was calculated to indicate the proportion of sampled individuals represented by unique genotypes. Population-level summary statistics were derived for each species and sampled population, including numbers of sampled individuals, multilocus genotypes, clonal richness, loci, polymorphic loci, percentage polymorphic loci, observed and expected heterozygosity, inbreeding coefficient and levels of genetic differentiation among populations for each species (global FST). This record provides access to the population-level genetics summary data, DArT metadata and report outputs, and raw sequence data. Further details on laboratory processing, SNP filtering and population genetic analyses are provided in the final project report.

Notes

Credit
The data collections described in this record are funded by the Australian Government Department of Climate Change, Energy, the Environment and Water (DCCEEW) through the NESP Marine and Coastal Hub. In addition to NESP (DCCEEW) funding, this project is matched by an equivalent amount of in-kind support and co-investment from project partners and collaborators.

Data time period: 2024-02-02 to 2024-02-12

This dataset is part of a larger collection

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Other Information
MAP - seagrass population genetics (NESP_MaC_3-6_Furneaux_seagrass_genetics)

url : https://geoserver.imas.utas.edu.au/geoserver/NESP/wms

(View data in Seamap Australia)

url : https://seamapaustralia.org/map/#91ad5d39-7b38-446f-9fee-8b31468fc5c6

global : 436e10ed-3322-494c-93a3-3bdf3405c045

local : 02czsnj07

local : 0000-0003-2099-0462

local : 00arpt780

local : 0000-0001-7531-5750

local : 02czsnj07

local : 0000-0002-6076-3187

local : 02czsnj07

local : 0000-0003-2099-0462

local : 00arpt780

local : 0000-0001-7531-5750

Related dataset: Imagery from BOSS and uBRUVs deployed for mapping temperate subtidal seagrass of Tayaritja Sea Country (Furneaux Group of Islands), Lutruwita (Tasmania)

doi : 10.25959/wrxk-kv06

NESP MaC Project 3.6 - Exploring the distribution and ecological value of seagrass at the Furneaux Islands, Tasmania, 2023-2025 (IMAS, Deakin Uni)

doi : 10.71676/d88f285e

Identifiers
ACN 633 798 857