| Abstract Detail
Paleobotany Harbert, Robert S [1], Nixon, Kevin [2]. Applications of a novel model (CRACLE) for the estimation of >30,000 years of paleoclimate using packrat (Neotoma sp.) midden plant macrofossils from the American Southwest. Plant distributions have long been understood to be correlated with the environmental conditions to which species are adapted. Therefore, it is expected that the plants coexisting in a community are reflective of the local environment, particularly climate. The CRACLE method will be reviewed as a novel approach to the estimation of climate from local plant taxonomic diversity data. CRACLE, implemented in R, is a likelihood-based method that employs specimen collection data at a global scale for the inference of species climate tolerance. CRACLE calculates the maximum joint likelihood of coexistence given individual species climate tolerance characterization to estimate the expected climate. Several modern datasets have been analyzed using CRACLE and these results show that highly accurate, quantitative estimates of climate can be generated from lists of >5 taxa in a community. Recently, CRACLE has been used to reconstruct late Pleistocene and Holocene paleoclimate of the American Southwest using packrat (Neotoma spp.) midden plant macrofossil data to create a ~30,000 year climate record.
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Link to original article
1 - Cornell University, Plant Biology, 2210 Ellis Hollow Rd., Ithaca, NY, 14850, United States
2 - Cornell University, 412 Mann Library, Ithaca, New York, 14850, United States
Keywords:
Paleoclimate
biodiversity
Vegetation
Pleistocene
Holocene.
Presentation Type: Oral Paper
Session: 28, Mesozoic to Pleistocene Paleobotany
Location: 102/Savannah International Trade and Convention Center
Date: Tuesday, August 2nd, 2016
Time: 4:30 PM
Number: 28012
Abstract ID:43
Candidate for Awards:None |
