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Abstract Detail


Soltis, Pamela S. [1], Soltis, Douglas E. [1], Naranjo, Andre [1].

Dicerandra: Understanding Ancestral Niches of a Narrow Endemic.

Dicerandra (Lamiaceae) comprises 11 species (Dicerandra christmanii, D. cornutissima, D. densiflora, D. frutescens, D. fumella, D. immaculata, D. linearifolia, D. modesta, D. odoratissima, D. radfordiana, and D. thinicola,) endemic to the southeastern United States. Species of Dicerandra are threatened or endangered and restricted to sand hill vegetation and a mosaic of scrub habitats, with some species (D. cornutissima, D. thinicola, D. immaculata, D. frutescens, D. christmanii, and D. radfordiana) being restricted to one or two sites in peninsular Florida and Georgia. Using locality and specimen data from iDigBio and other sources, we have applied ecological niche modeling (ENM) and niche equivalency testing to investigate shifts in abiotic niche space among species. Phylogenies were reconstructed using several plastid genes and ENMs were integrated in a comparative method workflow using the ‘R’ package ‘phyloclim’ to estimate ancestral environmental tolerances at each node. These results will be used to reconstruct ancestral niche spaces when sea levels and climate were markedly different. Niche conservatism will be evaluated based on these results and interpreted in the light of conservation concern for these rare plant species.

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1 - University Of Florida, Florida Museum Of Natural History, PO BOX 117800, Gainesville, FL, 32611-7800, USA, 352/273-1964

Niche conservatism
ecological niche modeling.

Presentation Type: Oral Paper
Session: 19, ASPT Cooley Awards
Location: Sundance 5/Omni Hotel
Date: Tuesday, June 27th, 2017
Time: 10:00 AM
Number: 19008
Abstract ID:207
Candidate for Awards:George R. Cooley Award

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