期刊
SENSORS
卷 16, 期 11, 页码 -出版社
MDPI
DOI: 10.3390/s16111948
关键词
StarDot cameras; PhenoCam network; pinyon and juniper; sagebrush steppe; semi-arid meadows; camera-based repeat digital photography
资金
- Great Basin Landscape Conservation Cooperative through the U.S. Fish and Wildlife Service [59-5370-3-001]
- ARS [ARS-0429922, 911935] Funding Source: Federal RePORTER
Plant phenology is recognized as important for ecological dynamics. There has been a recent advent of phenology and camera networks worldwide. The established PhenoCam Network has sites in the United States, including the western states. However, there is a paucity of published research from semi-arid regions. In this study, we demonstrate the utility of camera-based repeat digital imagery and use of R statistical phenopix package to quantify plant phenology and phenophases in four plant communities in the semi-arid cold desert region of the Great Basin. We developed an automated variable snow/night filter for removing ephemeral snow events, which allowed fitting of phenophases with a double logistic algorithm. We were able to detect low amplitude seasonal variation in pinyon and juniper canopies and sagebrush steppe, and characterize wet and mesic meadows in area-averaged analyses. We used individual pixel-based spatial analyses to separate sagebrush shrub canopy pixels from interspace by determining differences in phenophases of sagebrush relative to interspace. The ability to monitor plant phenology with camera-based images fills spatial and temporal gaps in remotely sensed data and field based surveys, allowing species level relationships between environmental variables and phenology to be developed on a fine time scale thus providing powerful new tools for land management.
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