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

  • Tree metrics
    Started: 1988-06-01

    Permanently tagged trees are evaluated annually for crown condition, injury to bole and crown, taphole closure, seed production, regeneration and early and late season defoliation. Plot consists of 5 subplots, 20 X 20 m size. Trees are permanently tagged. Protocols follow international NAMP methods manual.

Past Methods (No longer in use)

  • Injury assessment after ice storm
    Started: 1998-01-30
    Ended: 1998-06-01

    In 1998, special spring survey was conducted to assess injury from the January ice storm. Addition of regeneration counts was also added.

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
AZIMUTHTree azimuth

Azimuth from plot center to tree

Measurement type: Ratio
Unit: unavailable
Precision: 1
BOLE_DAMAGE_CODEBole damage code

Code describing the type of bole damage

Measurement type: Nominal
CAUSE_DAMAGE1Cause of first damage

Damage-causing agent

Measurement type: Nominal
NAMP Cause_Damage Codes
+ show
Appears in data asMeaning of code
0not idenfitied
1insect
2fungus
3weather
4animal
5human
6fire
7silvicultural
8tapping
9overmaturity
CAUSE_DAMAGE2Cause of second damage

Damage-causing agent

Measurement type: Nominal
NAMP Cause_Damage Codes
+ show
Appears in data asMeaning of code
0not idenfitied
1insect
2fungus
3weather
4animal
5human
6fire
7silvicultural
8tapping
9overmaturity
CAUSE_DAMAGE3Cause of third damage

Damage-causing agent

Measurement type: Nominal
NAMP Cause_Damage Codes
+ show
Appears in data asMeaning of code
0not idenfitied
1insect
2fungus
3weather
4animal
5human
6fire
7silvicultural
8tapping
9overmaturity
CLUSTERCluster

Each maple stand has a cluster of 5 plots

Measurement type: Nominal
COUNTERCounter

Record counter

Measurement type: Ordinal
CROWN_RATING_DEFOLIATIONCrown rating defoliation

Measurement type: Ordinal
CURRENT_TAPHOLESCurrent tapholes

Current tapholes

Measurement type: Ratio
Unit: unavailable
Precision: 1
DAMAGE1First damage type

Types of damage

Measurement type: Nominal
NAMP Damage Codes
+ show
Appears in data asMeaning of code
21sweep or crook
22swelling
23dead branches
31large open wounds
32small open wound
33dead bark
34sloughing bark
35closed wound
36seams or cracks
37other
DAMAGE2Second damage type

Types of damage

Measurement type: Nominal
NAMP Damage Codes
+ show
Appears in data asMeaning of code
21sweep or crook
22swelling
23dead branches
31large open wounds
32small open wound
33dead bark
34sloughing bark
35closed wound
36seams or cracks
37other
DAMAGE3Third damage type

Types of damage

Measurement type: Nominal
NAMP Damage Codes
+ show
Appears in data asMeaning of code
21sweep or crook
22swelling
23dead branches
31large open wounds
32small open wound
33dead bark
34sloughing bark
35closed wound
36seams or cracks
37other
DBHDiameter at breast height

Diameter of tree at breast height. Note that DBH is measured on a 5 year cycle and is not measured every year.

Measurement type: Ratio
Unit: unavailable
Precision: 1
DIEBACKDieback

A measure of an unhealthy condition - branch mortality that begins at the end of a limb and progresses downward. This is an estimate of the proportion of the crown silhouette.

Measurement type: Ratio
Unit: unavailable
Precision: 1
DIRECTIONDirection to tree

Direction from plot center to tree

Measurement type: Ratio
Unit: unavailable
Precision: 1
DISCOLORATIONFoliage Discoloration

An estimate of the amount of discolored foliage in the foliated (leaved) part of the crown. Foliage is considered discolored when 50% or more of the leaf is more red or brown than green. Can indicate tree health problems.

Measurement type: Ratio
Unit: unavailable
Precision: 1
DISTANCEDISTANCE

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Measurement type:
DWARFINGDwarfing

Dwarfing

Measurement type: Ratio
Unit: unavailable
Precision: 1
EARLY_DEFOLIATIONEarly defoliation

Amount of defoliation caused by spring and summer defoliators such as pear thrips, forest tent caterpillar, gypsy moth etc.

Measurement type: Nominal
NAMP Early_Defoliation Codes
+ show
Appears in data asMeaning of code
1less than 30% of crown defoliated
231-60% of crown is defoliated
3more than 60% defoliation
LOCATION_OF_DAMAGE1Location of first damage

Location of damage

Measurement type: Nominal
NAMP Location_of_Damage Codes
+ show
Appears in data asMeaning of code
1lower half of tree bole but above 30 cm from ground
2upper half of bole
3whole bole
4stump/roots
5whole tree
LOCATION_OF_DAMAGE2Location of second damage

Location of damage

Measurement type: Nominal
NAMP Location_of_Damage Codes
+ show
Appears in data asMeaning of code
1lower half of tree bole but above 30 cm from ground
2upper half of bole
3whole bole
4stump/roots
5whole tree
LOCATION_OF_DAMAGE3Location of third damage

Location of damage

Measurement type: Nominal
NAMP Location_of_Damage Codes
+ show
Appears in data asMeaning of code
1lower half of tree bole but above 30 cm from ground
2upper half of bole
3whole bole
4stump/roots
5whole tree
NOTES1Notes1

Notes1

Measurement type: Nominal
NOTES2Notes2

Notes2

Measurement type: Nominal
NOTES3Notes3

Notes3

Measurement type: Nominal
NOTES4Notes4

Notes4

Measurement type: Nominal
NOTES5Notes5

Notes5

Measurement type: Nominal
NOTES6Notes6

Notes6

Measurement type: Nominal
NOTES7Notes7

Notes7

Measurement type: Nominal
NOTES8Notes8

Notes8

Measurement type: Nominal
OPEN_TAPHOLESOpen tapholes

A taphole is considered open when the point end of a pencil pushed into the taphole hits the cambium

Measurement type: Ratio
Unit: unavailable
Precision: 1
PAST_DBHPrevious diameter at breast height

Diameter at breast height of tree in previous survey

Measurement type: Ratio
Unit: unavailable
Precision: 1
PLOTPlot ID

The 5 plots in each cluster are arranged with one in the center and 1 in each cardinal direction. If they are in a different arrangement then they are numbered 5-9.

Measurement type: Nominal
NAMP Plot Codes
+ show
Appears in data asMeaning of code
1North
2East
3South
4West
5Center
POSITIONCrown Position

Position of the crown relative to neighboring trees.

Measurement type: Nominal
NAMP Position Codes
+ show
Appears in data asMeaning of code
1dominant (crown extends above canopy)
2codominant (crown at general level of canopy)
3intermediate (crowns just below canopy)
4surpressed (crowns entirely below canopy)
SEED_PRODUCTIONSeed production

Used for sugar maples only. Excessive seed production is believed to weaken a tree and is followed by increased dieback the next year.

Measurement type: Ordinal
SPECIESTree Species

See vegetation species database for list of tree species

Measurement type: Nominal
TRANSPARENCYFoliage Transparency

Determined by estimating the amount of sky light visible through the foliated (leaved) branches, averaged over the entire crown. This is another indicator of tree health.

Measurement type: Ratio
Unit: unavailable
Precision: 1
TREETree ID

Tree ID number within the plot

Measurement type: Nominal
TREE_HEIGHTTree height

Height of the tree

Measurement type: Ratio
Unit: unavailable
Precision: 1
TREE_ORDERTree order

Tree order

Measurement type: Ordinal
UniqueTreeIDUniqueTreeID

Measurement type: Nominal
VIGORTree vigor

Coded tree vigor rating

Measurement type: Ordinal
NAMP Vigor Codes
+ show
Appears in data asMeaning of code
1healthy
2light decline
3moderate decline
4severe decline
5dead (natural death)
6dead (human caused)
YEARYear

Year of survey

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 in Browns River watershed, in sugar maple forest at Proctor Maple Research Center.