Details and Metadata
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Methods
The methods followed in the creation of the dataset, including description of field, laboratory and processing steps, and quality control procedures
Current Methods
Monitoring on Mount Mansfield
Started: 1992-07-15Sugar maple and yellow birch are monitored at 1400 and 2200 feet on Mansfield
Started: 1999-07-15Yellow birch and paper birch at 2600 feet on Mansfield were added to represent high elevation fall phenology.
Monitoring at Lye Brook
Red maple at 1400 feet in the Lye Brook Wilderness Area was added as a southern Vermont monitoring site.
Started: 1995-07-15Red maple (male and female) and white ash are monitored at 1400 feet, only.
Crown metrics
Started: 1991-07-15Visual crown ratings are recorded on 5 trees and 5 saplings (same trees as for bud development ratings).
New color and leaf drop
Started: 1991-07-15Visual crown ratings consist of percent color other than green, transparency (%), dieback-loss of leaves (%).
Started: 1994-07-15Crown density measurement was added in 1994 as a way to better estimate leaf drop.
Started: 1991-07-15Initial crown ratings are recorded in July, then every other week until color and drop changes rapidly (end of September) when weekly measurements are made. Full leaf off density is used to calculate percent leaf drop at each visit.
Started: 2001-07-15New color and leaf drop methods added to existing methods for testing. Color based on % color visible regardless of leaf drop. Added % green. Leaf drop based on visual estimate rather than measures of density, transparency or dieback. Total of color, green and leaf drop to equal 100%.
Dataset Fields
Detailed documentation of the fields comprising the dataset, including the type of measurement, units where applicable, and any controlled vocabularies or code lists present in the data
Field Name Caption Description Additional Information Year Year Year of survey
DateTime Date/Time Format: YYYY Species Species Species observed. Note that RMS is female red maple, and RMP is male red maple.
NominalFall Color Phenology Monitoring Species Codes
+ showAppears in data as Meaning SM sugar maple (Acer saccharum) - View ITIS Record RMS red maple (Acer rubrum) - View ITIS Record WA white ash (Fraxinus americana) - View ITIS Record WB paper birch (Betula papyrifera) - View ITIS Record YB yellow birch (Betula alleghaniensis) - View ITIS Record RMP red maple (Acer rubrum) - View ITIS Record Elevation Elevation Elevation of survey
Ratio
Unit: foot
Precision: 1day246 Day 246 percent leaf drop Average percent leaf drop on day-of-year 246
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Precision: 0.1day247 Day 247 percent leaf drop Average percent leaf drop on day-of-year 247
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Precision: 0.1day248 Day 248 percent leaf drop Average percent leaf drop on day-of-year 248
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Precision: 0.1day276 Day 276 percent leaf drop Average percent leaf drop on day-of-year 276
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Precision: 0.1day297 Day 297 percent leaf drop Average percent leaf drop on day-of-year 297
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Precision: 0.1Sampling Equipment
Equipment and software used to collect data, including how that equipment was used.
No sampling equipment recorded for this dataset
Site Characteristics
The spatial extent of the dataset site coverage, and descriptions of the spatial extent and context for the data collection
- Site Description
Upper elevation site (2200 ft.) added in the Underhill State Park.
- Site Description
West slope of Mount Mansfield in the Browns River watershed at low elevation site (1400 ft.) at the Proctor Maple Research Center,