10.5061/DRYAD.C76Q3T7
Summers, Jennifer L.
Tulane University
Bernik, Brittany
Tulane University
Saunders, Colin J.
Florida International University
McLachlan, Jason S.
Notre Dame University
University of Notre Dame
Blum, Michael J.
Tulane University
Data from: A century of genetic variation inferred from a persistent
soil-stored seed bank
Dryad
dataset
2018
coastal marsh
Scirpus olneyi
sedge
Schoenoplectus americanus
resurrection ecology
Holocene
National Science Foundation
https://ror.org/021nxhr62
DEB-1556556, BCS-1655781, BCS-1655702, DEB-0950080, DEB-1457100, DEB-1557009
2018-06-26T13:15:24Z
2018-06-26T13:15:24Z
en
https://doi.org/10.1111/eva.12675
189095 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Stratigraphic accretion of dormant propagules in soil can result in
natural archives useful for studying ecological and evolutionary responses
to environmental change. Few attempts have been made, however, to use
soil-stored seed banks as natural archives, in part because of concerns
over non-random attrition and mixed stratification. Here we examine the
persistent seed bank of Schoenoplectus americanus, a foundational brackish
marsh sedge, to determine whether it can serve as a resource for
reconstructing historical records of demographic and population genetic
variation. After assembling profiles of the seed bank from radionuclide
dated soil cores, we germinated seeds to ‘resurrect’ cohorts spanning the
20th century. Using microsatellite markers, we assessed genetic diversity
and differentiation among depth cohorts, drawing comparisons to extant
plants at the study site and in nearby and more distant marshes. We found
that seed density peaked at intermediate soil depths. We also detected
genotypic differences among cohorts as well as between cohorts and extant
plants. Genetic diversity did not decline with depth, indicating that the
observed pattern of differentiation is not due to attrition. Patterns of
differentiation within and among extant marshes also suggest that local
populations persist as aggregates of small clones, likely reflecting
repeated seedling recruitment and low immigration from admixed regional
gene pools. These findings indicate that persistent and stratified
soil-stored seed banks merit further consideration as resources for
reconstructing decadal-to-century long records that can lend insight into
the tempo and nature of ecological and evolutionary processes that shape
populations over time.
sample_id_namesThis file includes the names of samples provided in
shorthand in MSA input
filesdryad_idsmsa.xlsxSERC_KirkpatrickMarsh_MSA_summaryoutputThis is a
summary output file generated in MSA for samples taken in Kirkpatrick
Marsh / SERC in Edgewater,
MDSummary_serc_trimmed.xlsChesapeake_MSA_summaryoutputSummary output
generated by MSA for Chesapeake Bay samples of extant S. americanusSummary
- Copy.xlsAtlantic_MSA_summaryoutputSummary output generated for Atlantic
coast samples of extant S. americanus (microsatellites)Summary -
Copy.xlsGulf_MSA_summaryoutputOutput generated by MSA for Gulf coast
samples of extant S. americanus (microsatellites)Gulf_summary_MSA.xls
Gulf Coast
Atlantic Coast
Chesapeake Bay