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: 1992-07-15

    Sugar maple and yellow birch are monitored at 1400 and 2200 feet on Mansfield


  • Started: 1999-07-15

    Yellow 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: 1995-07-15

    Red maple (male and female) and white ash are monitored at 1400 feet, only.

  • Crown metrics
    Started: 1991-07-15

    Visual crown ratings are recorded on 5 trees and 5 saplings (same trees as for bud development ratings).

  • New color and leaf drop
    Started: 1991-07-15

    Visual crown ratings consist of percent color other than green, transparency (%), dieback-loss of leaves (%).


  • Started: 1994-07-15

    Crown density measurement was added in 1994 as a way to better estimate leaf drop.


  • Started: 1991-07-15

    Initial 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: 2001-07-15

    New 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
DateDate

Date

Measurement type: DateTime
Date/Time Format: DD/MM/YYYY
DOYDOY

Day of the year

Measurement type: Nominal
ElevationElevation

Measurement type: Interval
Units:
Numerical DateNumerical Date

Numerical date

Measurement type: Nominal
PercentFieldLeafDrop T1PercentFieldLeafDrop T1

Percent field leaf drop T1

Measurement type: Interval
Units:
PercentFieldLeafDrop T2PercentFieldLeafDrop T2

Percent field leaf drop T2

Measurement type: Interval
Units:
PercentFieldLeafDrop T3PercentFieldLeafDrop T3

Percent field leaf drop T3

Measurement type: Interval
Units:
PercentFieldLeafDrop T4PercentFieldLeafDrop T4

Percent field leaf drop T4

Measurement type: Interval
Units:
PercentFieldLeafDrop T5PercentFieldLeafDrop T5

Percent field leaf drop T5

Measurement type: Interval
Units:
PercentFieldLeafDrop T6PercentFieldLeafDrop T6

Percent field leaf drop T6

Measurement type: Interval
Units:
PercentFieldLeafDrop TAVEPercentFieldLeafDrop TAVE

Percent field leaf drop TAVE

Measurement type: Interval
Units:
PercentGreen T1PercentGreen T1

Percent Green T1

Measurement type: Interval
Units:
PercentGreen T2PercentGreen T2

Percent green T2

Measurement type: Interval
Units:
PercentGreen T3PercentGreen T3

Percent Green T3

Measurement type: Interval
Units:
PercentGreen T4PercentGreen T4

Percent Green T4

Measurement type: Interval
Units:
PercentGreen T5PercentGreen T5

Percent Green T5

Measurement type: Interval
Units:
PercentGreen T6PercentGreen T6

Percent Green T6

Measurement type: Interval
Units:
PercentGreen TAVEPercentGreen TAVE

Percent Green TAVE

Measurement type: Interval
Units:
PercentNewColor T1PercentNewColor T1

Percent New Color T1

Measurement type: Interval
Units:
PercentNewColor T2PercentNewColor T2

Percent New Color T2

Measurement type: Interval
Units:
PercentNewColor T3PercentNewColor T3

Percent New Color T3

Measurement type: Interval
Units:
PercentNewColor T4PercentNewColor T4

Percent New Color T4

Measurement type: Interval
Units:
PercentNewColor T5PercentNewColor T5

Percent New Color T5

Measurement type: Interval
Units:
PercentNewColor T6PercentNewColor T6

Percent New Color T6

Measurement type: Interval
Units:
PercentNewColor TAVEPercentNewColor TAVE

Percent New Color TAVE

Measurement type: Interval
Units:
SppSpp

Species code (First letters of the first part of the common name and the first letter of the second part of the common name IE Sugar Maple = SM)

Measurement type: Nominal
SppModSppMod

Male or Female?

Measurement type: Nominal
VMC SiteVMC Site

VMC site

Measurement type: Nominal
YearYear

Year

Measurement type: DateTime
Date/Time Format: YYYY

Sampling 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,