Abstract Detail



Macroevolution

Aleman, Max [1], Tracy, Mark [2], Foss, Kristen [1], Goolsby, Eric [3], Mason, Chase [4].

Untangling the macroevolution of leaf size and shape with environment across 15 genera of temperate woody plants.

As the primary productive organs of most plants, leaves govern many aspects of plant physiology and mediate a large number of ecological interactions. Interspecific variation in leaf size and shape is among the most obvious and charismatic of differences among species, and such variation has been shown in many groups to vary in response to environmental conditions. This work assesses the macroevolution of leaf size and shape in relation to habitat climate and soil conditions within each of 15 genera of temperate woody trees and shrubs. Leaves were sampled from over 500 species under common garden conditions in the Arnold Arboretum of Harvard University. Binarized leaf images were used to obtain average leaf area, and Elliptical Fourier analysis was used to describe variation in leaf shape as a series of harmonics collapsed into a number of major principal components axes. For each species, locality occurrences were obtained from digitized herbarium records hosted on the GBIF and iDigBio databases, and source site climate and soil variables were extracted from modeled global data layers available via WorldClim, WorldGrids, SoilGrids, and the CGIAR Global Aridity and PET database. Phylogenetic comparative methods were used to assess the evolution of leaf size and shape in relation to source habitat environmental conditions using existing published phylogenies of each genus. This work examines the evolution of leaf size and shape with environment in 15 independent case studies of diversification across the temperate zones of the Northern Hemisphere, providing insights into the predictability of leaf evolution in response to environmental pressures in temperate woody plants.


Related Links:
Mason Lab Website
Goolsby Lab Website


1 - University of Central Florida, Department of Biology, 4110 Libra Drive, Orlando, FL, 32816, US
2 - Harvard University, Arnold Arboretum, 1300 Centre Street, Boston, MA, 02130, USA
3 - Yale University, Department of Ecology and Evolutionary Biology, 165 Prospect St, New Haven, CT, 06511, USA
4 - University Of Central Florida, Department Of Biology, 4110 Libra Dr, Orlando, FL, 32816, United States

Keywords:
Leaf size
Leaf shape
Elliptical Fourier Analysis
diversification
climate
Soil
Temperate
Woody Plants
Phylogenetic Comparative Methods
Trait Evolution.

Presentation Type: Oral Paper
Number:
Abstract ID:303
Candidate for Awards:None


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