Abstract Detail



Biodiversity Informatics & Herbarium Digitization

Messick, Jenna [1], Hoagland, Bruce [2].

Flowering and synchronicity utilizing herbarium specimens.

Herbaria serve as important potential sources of long-term data for biogeographical and climate change studies. Climate and phenology are intrinsically linked and changes in climate have the potential to alter phenological responses. We investigated potential changes in flowering for select members of the Brassicaceae and Lamiaceae across Oklahoma using herbarium specimens (ten species for each family). The specimens selected represented over 100 years of plant collecting in the state. The influence of climatic variables on flowering across the state and within provisional seed zones was tested using generalized additive models. Models were tested for each species first across the entire state then subset by Provisional Seed Zone to assess whether or not smaller scale climatic influences were at play. Changes in flowering were found for ten species, five in each family, at the state level. The seed zone-scale analyses produced more variable results. These changes were most often delays in flowering, rather than the anticipated advancement in flowering. The models found varying climatic variables influential in flowering; temperatures and precipitation three months prior to specimen collection were the significant variables for most of the species. Given that herbarium specimens typically represent a spatially biased sample, we tested the directional spatial autocorrelation as a measure of flowering synchronicity across the region using the Mantel bearing correlogram. Several species showed directionality in spatial autocorrelation for flowering across the state but then had no apparent directional autocorrelation when subset into seed zone. No directional autocorrelation meant individuals were synchronized with one another while the presence of directional autocorrelation showed individuals were not synchronized with one another. The directional autocorrelation from the seed zones best represented the direction and relative synchronicity of flowering for these species. This study showed that herbarium specimens are valid sources of information in phenology studies and, even though the data may have spatial bias, this can be used to show synchronicity or asynchronicity of within species flowering across a region.


1 - University of Oklahoma, Oklahoma Biological Survey/Dept of Microbiology & Plant Biology, 111 E. Chesapeake St, Norman, OK, 73019, USA
2 - University Of Oklahoma, 111 East Chesapeake Street, Norman, OK, 73019, United States

Keywords:
herbarium
phenology
Spatial analysis.

Presentation Type: Poster
Session: P, Biodiversity Informatics & Herbarium Digitization
Location: Grand Ballroom - Exhibit Hall/Mayo Civic Center
Date: Monday, July 23rd, 2018
Time: 5:30 PM
Number: PBI002
Abstract ID:189
Candidate for Awards:None


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