Historic and contemporary biogeographic perspectives on range-wide spatial genetic structure in a widespread seagrass.

ABSTRACT: Historical and contemporary processes drive spatial patterns of genetic diversity. These include climate-driven range shifts and gene flow mediated by biogeographical influences on dispersal. Assessments that integrate these drivers are uncommon, but critical for testing biogeographic hypotheses. Here, we characterize intraspecific genetic diversity and spatial structure across the entire distribution of a temperate seagrass to test marine biogeographic concepts for southern Australia. Predictive modeling was used to contrast the current Posidonia australis distribution to its historical distribution during the Last Glacial Maximum (LGM). Spatial genetic structure was estimated for 44 sampled meadows from across the geographical range of the species using nine microsatellite loci. H

SUBMITTER: Sinclair EA 

PROVIDER: S-EPMC10025079 | biostudies-literature | 2023 Mar

REPOSITORIES: biostudies-literature