Details and Metadata

Printer-friendly version     View XML version    Download Ecological Metadata Language file


Methods

The methods followed in the creation of the dataset, including description of field, laboratory and processing steps, and quality control procedures

Current Methods

  • Mean annual basal increment changes

    Raw data collected (1993) by Jeffrey Hughes to study changes in mean annual basal area increment (BAI) of canopy sugar maple trees growing at and below the species' elevation limit on Five Vermont mountainsides, in 5 year intervals, from 1963 to 1992.

Past Methods (No longer in use)

  • Sampling for differences in distribution
    Started: 1992-06-01
    Ended: 1997-01-14

    Evaluation of sugar maple, yellow birch, paper birch and mountain birch on several Vermont mountains to measure differences in distriubtion as it relates to elevation-related climate.

  • Evaluation
    Started: 1992-06-01
    Ended: 1997-01-14

    Overstory and understory individuals evaluated.

  • Composition of data
    Started: 1992-06-01
    Ended: 1997-01-14

    Data includes species, density, relative density, basal area, relative basal area, and radial growth.

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
Date_analyzedDate Analyzed

Day of year on which data was analyzed

Measurement type: DateTime
Date/Time Format: other
SiteSite

Location of data collection

Measurement type: Nominal
Sample_numberSample Number

Sample Number

Measurement type: Nominal
Unit: unavailable
Date_collectedDate Collected

Day of year on which data was collected

Measurement type: DateTime
Date/Time Format: other
ElevationElevation

Elevation at which sample was collected

Measurement type: Ratio
Unit: unavailable
Precision: 10
0_5_years_ago0-5 Year Age Class

0-5ya age class

Measurement type: Ratio
Unit: unavailable
Precision: 0.01
6_10_years_ago6-10 Year Age Class

6-10ya age class

Measurement type: Ratio
Unit: unavailable
Precision: 0.01
11_15_years_ago11-15 Year Age Class

11-15ya age class

Measurement type: Ratio
Unit: unavailable
Precision: 0.01
16_20_years_ago16-20 Year Age Class

16-20 ya age class

Measurement type: Ratio
Unit: unavailable
Precision: 0.01
21_25_years_ago21-25 Year Age Class

21-25 ya age class

Measurement type: Ratio
Unit: unavailable
Precision: 0.01
26_30_years_ago26-30 Year Age Class

26-30 ya age class

Measurement type: Ratio
Unit: unavailable
Precision: 0.01
Core elevationElevation

Elevation at which sample was collected

Measurement type: Ratio
Unit: unavailable
Precision: 10
CirumferenceCircumference

Circumference of the sampled tree (the length of the outer perimeter of the tree)

Measurement type: Ratio
Unit: unavailable
Precision: 1
dbhDBH

Diamter at breast height (standard forestry measurement of tree girth)

Measurement type: Ratio
Unit: unavailable
Precision: 0.00001
dbh-bdbh-b

dbh-b

Measurement type: Ratio
Unit: unavailable
Precision: 0.00001
radiusRadius

Distance from the center of the tree to any point on its perimeter

Measurement type: Ratio
Unit: unavailable
Precision: 0.00001
0_5_ra_RG0-5 Year RG

0-5 yr Radial Growth

Measurement type: Ratio
Unit: unavailable
Precision: 0.001
0_5_Bala0-5 Year BAI

0-5 yr Basal Area Increment

Measurement type: Ratio
Unit: unavailable
Precision: 0.00001
6_10_ya_RG 6-10 Year RG

6-10 yr Radial Growth

Measurement type: Ratio
Unit: unavailable
Precision: 0.001
 6_10_ya_BAIb 6-10 Year BAI

6-10 yr Basal Area Increment

Measurement type: Ratio
Unit: unavailable
Precision: 0.00001
 11_15_ya_RG11-15 Year RG

11-15 yr Radial Growth

Measurement type: Ratio
Unit: unavailable
Precision: 0.001
11_15_ya_BAIc 11-15 Year BAI

11-15 yr Basal Area Increment

Measurement type: Ratio
Unit: unavailable
Precision: 0.00001
16_20_ya_RG16-20 Year RG

16-20 yr Radial Growth

Measurement type: Ratio
Unit: unavailable
Precision: 0.001
16_20_ya_BAId 16-20 Year BAI

16-20 yr Basal Area Increment

Measurement type: Ratio
Unit: unavailable
Precision: 0.00001
21_25_ya_RG21-25 Year RG

21-25 yr Radial Growth

Measurement type: Ratio
Unit: unavailable
Precision: 0.001
21_25_ya_BAIe21-25 Year BAI

21-25 yr Basal Area Increment

Measurement type: Ratio
Unit: unavailable
Precision: 0.00001
26_30_ya_RG26-30 Year RG

26-30 yr Radial Growth

Measurement type: Ratio
Unit: unavailable
Precision: 0.001
26_30_ya_BAIf 26-30 Year BAI

26-30 yr Basal Area Increment

Measurement type: Ratio
Unit: unavailable
Precision: 0.00001

Sampling Equipment

Equipment and software used to collect data, including how that equipment was used.

Past Sampling Equipment (No longer in use)

  • Increment core, dbh tape
    Started: 1992-06-01
    Ended: 1997-01-14

    Increment core, dbh tape

Site Characteristics

The spatial extent of the dataset site coverage, and descriptions of the spatial extent and context for the data collection

  • Site Description

    West slope of Mount Mansfield in the Stevensville Brook watershed.

  • Site Description

    Five elevations off the Butler Lodge trail: 500, 600, 700, 800, 900 m

  • Site Description

    3-5 10 X 30 m sampling plots/elevation for trees and saplings.

  • Site Description

    30 - 1 X 1 m sampling plots/elevation for germinants and seedlings.