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Abstract Detail

Phylogenetic approaches to understanding biodiversity and endemism

Germain-Aubrey, Charlotte [1], Allen, Julie M. [2], Neubig, Kurt M. [3], Laffan, Shawn [4], Guralnick, Robert [5], Lamy, Thomas [6], Majure, Lucas [7], Mishler, Brent [8], Soltis, Douglas [9], Ponciano, Jose-Miguel [10], Abbott, Richard [11], Soltis, Pamela [12].

Using herbarium data for niche modeling to study phylogenetic diversity and endemism of Florida plants.

The effort to digitize all biological collections in the USA is quickly leading to an online dataset of over one billion specimens, available for addressing questions at unprecedented scales. Florida hosts several biodiversity hotspots and is home to over 4,100 species of plants. Using herbarium collections, we took advantage of the historical data linked with the specimens and constructed a pipeline that extracts environmental variables at the time of the collection for each of over 1,500 species. Using this temporally fine-scale information, we built niche models for those species. In parallel, we sequenced two genes for those same species and constructed a dated ultrametric tree and a non-ultrametric tree. We combined the niche models with both phylogenies to examine patterns of phylogenetic diversity (PD) and endemism (PE) across Florida and applied a randomization test to find significant centers of paleo- and neo-endemism using Categorical Analysis of Neo- And Paleo-Endemism (CANAPE). We then examined the effect of phylogenetic uncertainty on these methods by randomly selecting 100 trees from the posterior distribution of both the ultrametric tree and the non-ultrametric tree and recalculating the phylogenetic diversity metrics. We visualize the spatial component of phylogenetic uncertainty and discuss how to take it into account. We also compared the results obtained using the ultrametric tree versus the non-ultrametric tree. PD measured on the dated ultrametric tree reflects the amount of evolutionary history in a location, while PD measured on the non-ultrametric tree reflects the amount of feature diversity in a location. We will discuss how each of these metrics shows a unique pattern and identifies different features of Florida’s phylogenetic landscape. Lastly, we examined phylogenetic beta diversity among identified centers of significantly high PE and show how this measure can be used for applied conservation purposes.

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1 - University Of Florida, Florida Museum Of Natural History, Dickinson HAll, Museum Road, Gainesville, FL, 32611, USA
2 - Illinois Natural History Survey, 607 E. Peabody Dr. , Champaign, IL, 61820, United States
3 - Southern Illinois University, Plant Biology, 1125 Lincoln Dr., Carbondale, IL, 62901, USA
4 - University of New South Wales, School of Biological, Earth and Environmental Sciences, Room 641A.D26 Building, UNSW, Kensington, 2052, Australia
5 - University of Florida, Florida Museum of Natural History, Dickinson Hall - Museum Road, Gainesville, FL, 32611, USA
6 - Universite de Montreal, Departement de Science Biologiques, Montreal, Quebec, Canada
7 - Desert Botanical Garden, 1201 N Galvin Parkway, Phoenix, AZ, 05008, USA
8 - University Of California, Berkeley, Dept Of Integrative Biology, 1001 Valley Life Science Building # 2465, Berkeley, CA, 94720-2465, USA
9 - University of Florida, Florida Museum of Natural History, 1659 Museum Road, Dickinson Hall, Gainesville, FL, 32611, USA
10 - University of Florida, Department of Biology, Museum Road, Gainesville, FL, 32611, USA
11 - Missouri Botanical Garden, P O Box 299, St Louis, MO, 63166-0299, USA
12 - University of Florida, Florida Museum of Natural History, Dickinson Hall - Museum Road, Gainesville, FL, 32611, United States

none specified

Presentation Type: Symposium Presentation
Session: SY17
Location: Salon 15/16/The Shaw Conference Centre
Date: Wednesday, July 29th, 2015
Time: 4:45 PM
Number: SY17008
Abstract ID:855
Candidate for Awards:None

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