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Conserved thermal performance curves across the geographic range of a gametophytic fern.
AoB Plants
October 2018
Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO, USA.
Species-level responses to environmental change depend on the collective responses of their constituent populations and the degree to which populations are specialized to local conditions. Manipulative experiments in common-garden settings make it possible to test for population variation in species' responses to specific climate variables, including those projected to shift as the climate changes in the future. While this approach is being applied to a variety of plant taxa to evaluate their responses to climate change, these studies are heavily biased towards seed-bearing plant species.
View Article and Find Full Text PDFDifferences in dehydration tolerance among populations of a gametophyte-only fern.
Am J Bot
April 2017
University of Florida, Department of Biology, Gainesville, Florida, USA.
Premise Of The Study: For many plant species, historical climatic conditions may have left lasting imprints that are detectable in contemporary populations. Additionally, if these historical conditions also prevented gene flow among populations, these populations may be differentiated with respect to one another and their contemporary environmental conditions. For the fern, , one theory is that historical conditions during the Pleistocene largely shaped both the distribution and lack of sporophyte production.
View Article and Find Full Text PDFVittaria appalachiana continues to provide insight into the biology of ferns: A commentary on two studies recently published in American Journal of Botany.
Am J Bot
April 2016
Department of Ecology, Evolution and Organismal Biology, Iowa State University, Ames, Iowa 50011 USA
Unraveling the origin of the Appalachian gametophyte, Vittaria appalachiana.
Am J Bot
April 2016
Department of Botany, Smithsonian Institution, MRC 166 PO Box 37012 Washington, District of Columbia 20013-7012 USA.
Premise Of Study: Ferns and lycophytes are distinct among plants in producing two free-living life stages: a long-lived sporophyte phase and a (usually) short-lived gametophyte phase. Notably, however, some species have perennial, vegetatively reproducing gametophytes. Vittaria appalachiana is one of just three species in which mature sporophytes are unknown.
View Article and Find Full Text PDFPopulation differentiation and countergradient variation throughout the geographic range in the fern gametophyte Vittaria appalachiana.
Am J Bot
January 2016
Department of Botany and Plant Pathology, Purdue University, West Lafayette, Indiana, USA, 47907 Department of Ecology and Evolutionary Biology, UCB 334, University of Colorado, Boulder, Colorado, 80309-0334 USA
Article Synopsis
- The study investigates how temperature influences population differentiation in the asexual fern species Vittaria appalachiana, which has limited gene flow between its populations.
- Researchers conducted reciprocal transplant experiments across six populations in the Appalachian region, measuring fitness indicators like survival and senescence over one year.
- Findings suggest populations respond differently to environmental conditions, with some evidence of local adaptation; however, many responses relate to temperature stability and other site-specific factors, highlighting the need for more research on asexual plants and their potential reactions to climate change.
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