Herbarium-Derived Phenological Data in North America
Description
We present infrastructure for developing large-scale and long-term phenological datasets across multiple herbaria, as well as a sample dataset that has been acquired from the digital archives of 440 distinct herbaria across North America and further processed to evaluate phenological status. This dataset contains 2,319,672 specimen records of plants collected while reproductively active. These data have been modified to explicitly codify the observed phenological status of each specimen at the time of collection, and to remove specimens for which information essential to assessing their phenology or the corresponding climate conditions in the year and location of collection were missing. As different collectors have used distinct taxonomic schema over space and time in documenting the specimens being collected, these data were also rectified into a single unified taxonomic schema to ensure that consistent taxon names were used throughout the dataset. Further, this data has been united with long-term and annual climate conditions in the year and location of collection, as derived from PRISM climate data (https://www.prism.oregonstate.edu/). To date, this data includes 2,319,672 specimens across 25,429 plant taxa. However, this represents a living dataset that will continue to be updated as digitization efforts proceed and additional digital specimen records become available.
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