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

  • Sensitive species monitoring
    Started: 1990-08-01

    Native plant species known to be senstive to ozone and reliable bioindicators of ozone injury, are monitored annually to determine the presence/absence of injury on up to 10 individuals per species.

  • Species monitored
    Started: 1991-08-01

    Species monitored include milkweed, blackberry, black cherry and white ash.

  • Voucher specimens
    Started: 1993-08-01

    Voucher specimens sent to regional expert for verification.

  • Species evaluation
    Started: 1994-08-01

    Starting in 1994, 10 - 30 individuals of each species evaluated for the % of leaf area injured (amount) and severity of injury using a 5 scale rating system; and dogbane added as a bioindicator.


  • Started: 1995-08-01

    Pin cherry added as a bioindicator species in 1995.


  • Started: 1996-08-01

    Definition of amount of injury changed from % of leaf area to % of leaves with injury in 1996.

  • Ozone concentrations

    One-hour average ozone concentrations recorded were obtained from the Vermont Air Pollution Control Agency.

  • Classification and rating of injured foliage

    Classification/Rating methods of injured foliage: (1) A five class system- combines the percentage of injured leaves and the intensity of damage on the 10 most severely injured leaves. (2) An eight class system- rates 30 leaves on each of three terminal shoots from near the top of a tree, or the oldest 30 leaves on a smaller plant.

Past Methods (No longer in use)

  • Individual condition
    Started: 1994-08-01
    Ended: 1995-08-31

    The location and type of injury recorded for each individual.

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
amount_maximumamount_maximum

The maximum amount of injury for a given biological species at a hexagon equals the maximum value of all the injury amounts for that species. If there are no injured plants within the species, the maximum amount of injury for the species equals zero.

Measurement type: Ratio
Units:
amount_meanamount_mean

summation( injury amounts for a given species at a hexagon that are greater than zero ) / number of damaged plants

Measurement type: Ratio
Units:
amount_minimumamount_minimum

minimum( injury amounts for a given species at a hexagon )

Measurement type: Ratio
Units:
count_of_plants_evaluatedcount_of_plants_evaluated

count( all plants evaluated for a given species at a hexagon )

Measurement type: Interval
Units:
count_of_plants_injuredcount_of_plants_injured

count( plants within a given species at a hexagon that have an injury severity amount greater than zero )

Measurement type: Interval
Units:
hexagon_numberhexagon_number

Measurement type: Nominal
ID_numID_num

Measurement type: Nominal
plants_ratioplants_ratio

plants_inj_cnt / plants_eval_cnt

Measurement type: Ratio
Units:
plot_numberplot_number

Measurement type: Nominal
projectproject

Measurement type: Nominal
severity_maximumseverity_maximum

maximum( injury severity amounts for a given species at a hexagon )

Measurement type: Ratio
Units:
severity_meanseverity_mean

summation( injury severity amounts for a given species at a hexagon that are greater than zero ) / plants_inj_cnt

Measurement type: Ratio
Units:
severity_minimumseverity_minimum

minimum( injury severity amounts for a given species at a hexagon )

Measurement type: Ratio
Units:
SpeciesSpecies

Measurement type: Nominal
species_indexspecies_index

plants_ratio * species_sum

Measurement type: Ratio
Units:
species_sumspecies_sum

summation( ( plant's injury amount ) * ( plant's injury severity amount ) ) / plants_inj_cnt

Measurement type: Ratio
Units:
yearyear

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

    West slope of Mt. Mansfield, open field at Proctor Maple Research Center. Sampling done in areas not mowed during current year.

  • Site Description

    In 1999 added CASTNet air quality station site to represent the Lye Brook Wilderness Area. Large open field with moist soil. Plants present include: pin cherry, blackberry, black cherry.