Abstract
Premise of the StudyThe Plant Phenology Ontology (PPO) was originally developed to integrate phenology observations of whole plants across different global observation networks. Here we describe a new release of the PPO and associated data pipelines that supports integration of phenology observations from herbarium specimens, which provide historical and modern phenology data.Methods and ResultsCritical changes to the PPO include key terms that describe how measurements from parts of plants, which are captured in most imaged herbarium specimens, relate to whole plants. We provide proof of concept for ingesting annotations from imaged herbarium sheets of Prunus serotina, the common black cherry. We then provide an example analysis of changes in flowering timing over the past 125 years, demonstrating the value of integrating herbarium and observational phenology data sets.ConclusionsThese conceptual and technical advances will support the addition of phenology data from herbaria, but also could be expanded upon to facilitate the inclusion of data from photograph‐based citizen science platforms. With the incorporation of herbarium phenology data, new historical baseline data will strengthen the capability to monitor, model, and forecast plant phenology changes.
Highlights
ObjectivesBecause observation network data are based on whole plants, and herbarium sheets often do not contain whole plants, our goal was to extend the Plant Phenology Ontology (PPO) and the supporting data integration pipeline to enable accurate inferences about phenological data from herbarium specimens
PREMISE OF THE STUDY: The Plant Phenology Ontology (PPO) was originally developed to integrate phenology observations of whole plants across different global observation networks
Critical changes to the PPO include key terms that describe how measurements from parts of plants, which are captured in most imaged herbarium specimens, relate to whole plants
Summary
Because observation network data are based on whole plants, and herbarium sheets often do not contain whole plants, our goal was to extend the PPO and the supporting data integration pipeline to enable accurate inferences about phenological data from herbarium specimens
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