Dicerandra: Understanding Past Distributions

TitleDicerandra: Understanding Past Distributions
Publication TypeConference Paper
Year of Publication2016
AuthorsNaranjo, Andre, and Soltis Pamela S.
Conference Name2016 Florida Rare Plant Task Force Meeting, "Challenges Facing Rare Plants"
Date Published04/2016
Conference LocationBok Tower Gardens, Lake Wales, FL
Keywordsconservation, niche modelling, Research
AbstractDicerandra (Lamiaceae) comprises nine species (Dicerandra christmanii, Dicerandra cornutissima, Dicerandra densiflora, Dicerandra frutescens, Dicerandra fumella, Dicerandra immaculata,Dicerandra linearifolia, Dicerandra modesta, Dicerandra thinicola, Dicerandra radfordiana) 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 to investigate shifts in abiotic niche space among species. Such shifts may have served as isolating mechanisms associated with speciation. These results will be used to reconstruct ancestral niche spaces when sea levels and climate were markedly different. We will make inferences on the possible ecological shifts and niche diversifications associated with speciation that have occurred during the evolution of the genus