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Morphology and genetics of Lythrum salicaria from latitudinal gradients of the Northern Hemisphere grown in cold and hot common gardens

Metadata Updated: September 1, 2023

Genetic diversity may promote a plant species’ invasiveness by facilitating the evolution of local adaptation, enhanced competitive abilities, and phenotypic plasticity. We examined the possible role of genetic diversity in the invasiveness of purple loosestrife, Lythrum salicaria L., a Eurasian native introduced to North America, through a broad geographic comparison of eight populations, four from Europe and four from North America. We further cultivated these populations in two common gardens varying by nearly 20 degrees of latitude to evaluate whether invasive populations exhibit heightened growth/reproductive capabilities and/or phenotypic plasticity when faced with widely varying environmental conditions. We found similar levels of genetic diversity regardless of continent of origin, indicating no loss of adaptive potential during the North American invasion, along with more rapid first-year growth of invasive populations regardless of garden. Further, we found evidence that our source populations had adapted to their respective latitudes on both continents, as plant size decreased with increases in a population’s latitude of origin. We observed no difference between continents in phenotypic plasticity in response to the widely varying conditions affecting our two gardens, suggesting either that such plasticity has played little role in the latitudinal spread of L. salicaria in North America, or that local selection has erased it over time. Our results support earlier studies demonstrating the evolution of local adaptation and increased competitiveness in invasive L. salicaria, bolstered by high levels of genetic diversity.

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Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date September 1, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date September 1, 2023
Publisher U.S. Geological Survey
Identifier USGS:5820ac97e4b080404e701267
Data Last Modified 20200830
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id ac04be56-da1b-4e22-a3ca-5dedc1590e5c
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -92.0447302,30.2260192,14.7716167,49.0050684
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 070caf3f4c88261d54f5c5c95800b5342e6c20a8154fcd26a1ba66f92e7f1a88
Source Schema Version 1.1
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