NDLI: Monitoring Plant Phenology Using Digital Repeat Photography

Content Provider	Springer Nature Link
Author	Crimmins, Michael A. Crimmins, Theresa M.
Copyright Year	2008
Abstract	Repeated observations of plant phenology have been shown to be important indicators of global change. However, capturing the exact date of key events requires daily observations during the growing season, making phenologic observations relatively labor intensive and costly to collect. One alternative to daily observations for capturing the dates of key phenologic events is repeat photography. In this study, we explored the utility of repeat digital photography for monitoring phenologic events in plants. We provide an illustration of this approach and its utility by placing observations made using repeat digital imagery in context with local meteorologic and edaphic variables. We found that repeat photography provides a reliable, consistent measurement of phenophase. In addition, digital photography offers advantages in that it can be mathematically manipulated to detect and enhance patterns; it can classify objects; and digital photographs can be archived for future analysis. In this study, an estimate of greenness and counts of individual flowers were extracted by way of mathematic algorithms from the photo time series. These metrics were interpreted using meteorologic measurements collected at the study site. We conclude that repeat photography, coupled with site-specific meteorologic measurements, could greatly enhance our understanding environmental triggers of phenologic events. In addition, the methods described could easily be adopted by citizen scientists and the general public as well as professionals in the field.
Starting Page	949
Ending Page	958
Page Count	10
File Format	PDF
ISSN	0364152X
Journal	Environmental Management
Volume Number	41
Issue Number	6
e-ISSN	14321009
Language	English
Publisher	Springer-Verlag
Publisher Date	2008-02-21
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Digital imaging Image processing Meteorologic monitoring Phenology Repeat photography RGB Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Forestry Management Atmospheric Protection/Air Quality Control/Air Pollution Nature Conservation Ecology Environmental Management
Content Type	Text
Resource Type	Article
Subject	Ecology Pollution Global and Planetary Change

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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