Appendix Vegetation Monitoring Protocol.pdf

Core Methods

Table 1. Core Methods for Vegetation Monitoring and Management Interpretation

Indicator Category Core Method(s) Primary Metric(s) Management Relevance

Desirable species Line-point intercept

Plot-level species inventory

Assigning desirable status to species

Cover of desirable native trees, shrubs, herbs, grasses, and sedges

Measures progress toward desired habitat conditions and management objectives.

Ground surface condition Line-point intercept

Plot-level observation

Bare ground, litter, coarse woody debris, rocks

Helps interpret fire or mowing effects, exposure, and successional state.

Invasive species Line-point intercept

Plot-level species inventory

Occurrence, cover, and patch extent where relevant

Provides early warning of degradation and helps prioritize control actions.

Photographic record Standardized photograph points and naming conventions

Repeat overview and plot-level images by direction and date

Provides visual corroboration of structural and compositional change.

Plot characterization Plot description

Metadata, management records, and field verification

Plot location, metadata, site setting, soil profile, disturbance indicators, and documented deviations from standard layout

Provides context for interpreting vegetation metrics, relocating plots, distinguishing treatment effects from site conditions, and comparing baseline conditions over time.

Treatment context Plot description

Metadata, management records, and field verification

Treatment type, treatment date, and time since treatment

Supports interpretation of response trajectories and scheduling decisions.

Undesirable species Line-point intercept

Plot-level species inventory

Assigning undesirable status to species

Cover of undesirable trees, shrubs, herbs, grasses, and sedges

Measures progress toward an undesired future condition that conflicts with management objectives.

Vegetation composition Line-point intercept

Plot-level species inventory

Species presence, relative cover, richness

Tracks floristic change, habitat quality, and diversity response to treatments.

Vegetation structure and height

Line-point intercept height records

Plot-level species inventory height classes

Repeat photographs

Height class, vertical structure Assesses habitat suitability and structural response to management.

Note: Site-specific target species, thresholds, and supplemental methods may be added, provided the core methods are retained consistent ly across years.

FIELD METHODOLOGIES

Monitoring Plots and Transects

Establish Monitoring Plots

A durable, low-profile metal survey tag will be used to monument the plot center and transect ends. Low-profile metal survey tags are preferred for marking permanent plots.

Plot location points will be georeferenced using a GIS device with submeter accuracy (e.g., a GEODE paired with a mobile device or tablet) to provide precision and reliability of plot location data and ensure crews can consistently return to the exact plot location.

Plot setup and sampling will be conducted in a manner that minimizes disturbance to vegetation and soils so observed changes reflect natural dynamics or management actions rather than sampling effects. This can be achieved by limiting trampling through consistent access routes, walking along the same side of transect to record observations on the undisturbed side, avoiding sampling under wet soil conditions, staging gear outside of the plots, and minimizing crew movement within the plots to reduce soil compaction and disturbance to plant communities.

Plot Layout

This protocol uses one standard plot configuration: a circular plot with four permanent 25- or 50-meter (m) transects with 1- or 2-m intercept point spacing distance arranged in an intersecting design (Figure 1).

A 25-m transect length with a 1-m intercept point spacing distance is recommended for dense, uniform areas such as grasslands, shrublands, or closed canopy forests. A 50-m transect length with a 2-m intercept point spacing distance is recommended for open-canopy woodlands or patchy shrublands to adequately capture spatial heterogeneity. Closer spacing is recommended when high-precision or rare species detection is an objective, whereas wider spacing is appropriate where vegetation structure is coarse or rapid assessment is prioritized.

A total of 100 intercept points per plot (i.e., four 50-m transects with 2-m intercept spacing or four 25-m transects with 1-m intercept spacing) will be implemented for consistency. Transect length and interval point spacing will be selected together to ensure that an adequate number of sampling points are collected per plot.

Figure 1. Standard plot layout. Four 25- to 50-m transects are arranged in an intersecting design, with intercept points spaced 1 to 2 m apart, ensuring 100 points for the entire plot.

Field Procedure

Determine and mark the center point of the plot with a low-profile metal survey tag and record the geolocation and plot identifier on the datasheet. Install the permanent transects starting 2 m from the plot center so they extend in perpendicular cardinal directions, or document otherwise (Figure 1). Stretch the transect tape straight, taut, and as close to the ground as practicable while minimizing disturbance to vegetation and soil. Where feasible, thread the transect tape at the base of trees and shrubs. During setup and sampling, remain on the same side of each transect. Mark the end of the transect line with a low-profile metal survey tag and record geolocation, transect length, and azimuth on the data sheet. Repeat the procedure for all four transects in the standard plot layout (Figure 1).

On slopes or in dense vegetation, maintain the standard intersecting layout as closely as practicable while minimizing trampling and disturbance. If the full transect length cannot be installed without excessive disturbance or obstruction from boulders or other features, adjust the target azimuth to preserve data quality.

Record all deviations from the standard plot layout on the data sheet.

Plot Description

FIELD PROCEDURE

During plot establishment, document the site name, management unit, plot identifier, plot center coordinates, transect azimuths and endpoints, coordinate system, datum, associated photographs, and any relocation uncertainty or departures from the standard intersecting layout. During plot establishment and each year of monitoring, document general observations such as insect damage, blowdown, stochastic events, and edaphic condition.

Soils may be characterized during plot establishment and again if site conditions change or additional information is needed to interpret vegetation response. During plot establishment, dig a soil pit to approximately 50 centimeters [cm], or to the depth necessary to identify major soil horizons or relevant soil features, in a representative and undisturbed location at the center of the plot. Cut a clean vertical face on one side of the pit, taking care not to disturb the soil surface. Position a measuring tape with the zero mark at the soil surface and photograph the profile face with the full depth and scale visible. Identify and delineate soil horizons, and describe each horizon by recording depth, texture (determined via touch), and soil color (determined using a Munsell soil color chart [moist soils]). Document additional features, including redoximorphic features, root abundance, coarse fragments, soil structure, and any evidence of compaction or disturbance. Note any uncommon features (e.g., carbonate accumulations, salts) where present.

Photograph Points

FIELD PROCEDURE

1. Set up the photograph point: Prepare a legible photograph ID board with the date, plot number, transect number, and transect azimuth. Place the board in an upright position (not laying on the ground) at the start of the transect near the center of the plot. Use bold, clearly visible writing, and ensure that vegetation does not obscure the board. Establish the photograph point location at the center of the plot, which is 2 m from the transect start, aligned with the transect azimuth and facing outward from the plot center.

2. Take the photograph: Hold the camera at chest height (approximately 4 feet above ground) and orient the lens toward the transect in landscape orientation. Position the photograph ID board at the bottom center of the image so that all information is visible. Move all crew members out of the field of view before taking the photograph. If previous photographs exist, match the original distance, azimuth, and horizon position as closely as practicable. A timestamp camera app for a mobile device or tablet may be used to add the time and date the photograph was taken, the geolocation, and the azimuth watermark to the photograph and its metadata when captured.

3. Record photograph information: Record the photograph number (if using a camera), transect number, and transect azimuth on the data sheet. If using a mobile device or tablet to capture the photograph and if photograph numbers are not available, record confirmation that a photograph was captured on the data sheet. Repeat this procedure for each transect in the plot.

4. Optional photographs: When relevant, photograph additional plot features, such as site boundaries, invasive species, erosion features, disease symptoms or dead plants, treatment effects, and other conditions that would aid interpretation.

5. Quality assurance: Include a photograph ID board in each photograph. Confirm that each photograph is in landscape orientation with the horizon visible where practicable. Confirm that the board is legible and includes all required information. Confirm that each photograph is in focus and properly exposed. Record the photograph number or confirmation that the photograph was captured on the data sheet. Immediately after completion of field work, download all photograph files; name digital images using the plot identifier, transect identifier, and date; and archive them in a searchable database.

Line-Point Intercept

Figure 2. Schematic of line-point intercept sampling along a transect, showing vegetation structure across height classes. Vertical pins intersect vegetation from the ground layer to the tree canopy, and black dots indicate the tallest plant part intercepted at each point.

Along a transect at designated intercept points, a pin (e.g., pin flag or stiff wire that is less than 1 millimeter

[mm] in diameter) will be lowered vertically, and each species and ground cover category that touches the pin is recorded (Figure 2).

Tree canopy cover will be measured at each intercept point using a tube densitometer. Height will be measured by species in height classes along the line-point intercept (Figure 2). Measurements may be taken using an extendable meterstick or telescopic measuring pole for taller shrubs. Each observed species will also be documented into the following height classes: ground layer, 0 to 1 m, 1 to 2 m, 2 to 5 m, and greater than 5 m.

FIELD PROCEDURE

1. Set up the transect: Stretch the measuring tape taut, and anchor both ends securely with steel stakes. Remain on the same side of the transect for all measurements, and begin at the 1- or 2-m mark, depending on the predetermined intercept spacing needed to obtain 100 total points.

2. Lower the pin: Lower the pin vertically beside the measuring tape from a consistent height at each sampling point until it touches the ground. In vegetation where upper layers are above eye level, an extendable meterstick or telescopic measuring pole may be used instead of a pin.

3. Record plant species at all intercepts: Once the pin reaches the ground, record every plant species it intercepts, at the tallest height class it is intercepted (Figure 2). A “hit” occurs when the pin touches a plant species or designated ground-cover category at a line-point intercept sampling point. Record species using a standardized species code or common name. Record each species only once per point. Measure only live plants. Measure tree canopy cover at each intercept point using a tube densitometer held vertically over the intercept point. If no plant is intercepted, record

“N” for none. Record bare ground soil, coarse woody debris, litter, rock, lichen, moss, and biocrust that is touched by the pin in the ground layer column (codes: S = soil, CWD = coarse woody debris, L = litter, R = rock, Li = lichen, M = moss, B = biocrust).

4. Record plant heights at all intercepts: Assign each plant species into a height class: ground layer, 0 to 1 m, 1 to 2 m, 2 to 5 m, or greater than 5 m. Plant height can be determined by measuring the tallest living plant part that intersects the intercept point. Do not stretch or move plant parts that do not overlap with the intercept point location. Measure height as the perpendicular distance from the soil surface to the tallest plant part within 10 cm on each side of the transect line at the intercept point (i.e., not the total height of the plant, but rather the height intersecting the intercept point). If vegetation is taller than can be measured directly, use a clinometer or geometric method to estimate the height. To apply the geometric method, step back to a distance where the tallest part of the plant is clearly visible, then measure the horizontal distance to that point and the angle from the observer’s position to the top. Calculate plant height as the measured horizontal distance multiplied by the tangent of the angle.

5. Identify species: If a plant cannot be identified to the species level, record using the appropriate unknown plant code followed by a sequential number: F# for unknown forbs, G# for unknown graminoids, S# for unknown shrubs, and T# for unknown trees. Collect a specimen for later identification. If the genus is known but the species is not, record using the approved genus code, or record using the appropriate unknown plant code and note the genus on the data sheet.

6. Repeat the procedure: Repeat this procedure for each intercept point along the transect, using a separate data sheet for each transect. Record all observations consistently and note any deviations from the standard procedure on the data sheet.

7. Quality assurance: Record plot and transect start coordinates on the data sheet and confirm transect location is accurate during each survey event by comparing to plot establishment data.

Avoid disturbing the vegetation or soil surface within the transect area. Remain on the same side of the transect tape throughout sampling. Keep the transect tape as close to the ground as possible by threading it beneath vegetation without disturbing the soil surface. Use additional pins or stakes as needed to secure the tape, especially under windy conditions. Confirm that each pin drop is as close to vertical as possible. Record USDA 4- or 5-character species codes when species-level identification is possible (NRCS 2026b). If the WMA or plot has been previously sampled, review the vegetation inventory before commencing fieldwork, and keep it available for field cross-checking. Document unknown plants consistently for later resolution, and update the vegetation inventory after identifications are confirmed. Photograph or collect unknown plants outside of the transects. Record only live plants. Review supplemental methods if a rare species or natural community is identified.

Plant Species Inventory

Table 4. Modified Daubenmire Cover Classes and Midpoints for Analysis

Cover Class Percent Cover Range Midpoint

1 <1% 0.5%

2 1%–5% 3%

3 5%–15% 10%

4 15%–25% 20%

5 25%–50% 37.5%

6 50%–75% 62.5%

7 75%–100% 87.5%

PROCEDURE

1. Species inventory plot: Use the circular plot that is defined by the ends of the four transects as the inventory area (Figure 1). Place pin flags at the ends of the transects to help mark the boundaries and make the search area visible to the recorder, if needed.

2. Search the plot systematically: Complete the species inventory after photograph points and line-point intercept measurements are finished. Search the entire plot uniformly for 30 minutes. Search from the plot corners toward the center using a systematic or zigzag pattern. One observer should conduct the search, although a recorder may remain outside the plot.

3. Record species: Record on the data sheet the cover and height class of each species within the plot with at least 50% of its base rooted within the plot boundary. Record each species using a standard species code, scientific name, or common name. If a species cannot be identified immediately, mark it with a pin flag, continue the search, and resolve the identification after the timed search is complete. Do not spend search time resolving unknown identifications during the timed search. Use temporary unknown plant codes when needed. If field identification remains uncertain, photograph the plant and, if permitted, collect a specimen from outside the plot that includes useful identifying features such as leaves, stems, flowers, and/or fruits.

4. Quality assurance: Mark and remain within the plot boundaries during the inventory. Do not exceed search time as it is intended to standardize results. Adhere to species identification quality assurance standards described in the line-point intercept methods section.

QUALITY ASSURANCE AND QUALITY CONTROL

Quality assurance and quality control (QA/QC) procedures will be applied throughout the monitoring process to maintain data integrity and reduce errors.

Calibration is a required component of QA. Its purpose is to ensure that observers apply methods accurately and consistently relative to one another and to the trainer. Calibrate all data gatherers immediately after training, at the start of each survey event, and whenever field crew membership changes. During each calibration, a qualified trainer or experienced data collector should observe each data gatherer, verify proper technique, and correct methodological deficiencies immediately.

During each calibration:

• Select a representative area that reflects the vegetation, soil surface features, and heterogeneity of the vegetation community type and treatment area that is being monitored.

• Establish a transect and a circular plot using the same procedures applied during monitoring.

• Have each observer collect data independently along the same line-point intercept transect and within the species inventory plot using the applicable method and QA procedures.

• Calculate percent cover metrics, and evaluate variation among observers.

• Confirm that observers are within 10% absolute difference of one another for each indicator.

If observer variation is not acceptable:

• Examine the transect as a group to discuss problematic features and method rules.

• Repeat the calibration exercise until results fall within the acceptable range.

1.1 Roles, Responsibilities, and Training

Successful implementation of this protocol depends on clear assignment of roles and consistent training across all personnel involved in planning, field data collection, data management, and interpretation (Table

6). Overall protocol oversight, annual planning, data stewardship, QA, and interpretation of monitoring results will be assigned to designated program leads and/or the WMA habitat biologist. Field crews are expected to demonstrate competency in navigation, plant identification to the lowest practical taxonomic level, consistent application of field methods, and accurate completion of metadata and photographic documentation requirements.

During initial implementation, at least one person with prior protocol experience should be included in each field crew, or direct supervision should be provided by a trained crew lead. All personnel should be trained in the monitoring objectives, measurement rules, naming conventions, and procedures for documenting uncertain identifications or other field uncertainties. Observer calibration should be conducted at the start of each field season and whenever new personnel are added to the crew to promote consistency among observers. Periodic consistency checks and field audits should be used to identify and correct method drift.

Responsibility should also be assigned for reviewing completed field forms, uploading and organizing photographs, verifying coordinates, and flagging data quality issues before data are finalized.

Table 6. Monitoring Team Member Roles and Responsibilities

Role Responsibility

WMA habitat biologist

Establish management goals and objectives.

Establish monitoring objectives.

Define the area to be monitored and pre-map plot locations.

Select supplemental methods, as needed, to support monitoring objectives.

Establish QA/QC procedures.

Interpret monitoring results.

Field crew lead Establish crew training and observer calibration procedures.

Coordinate field data collection activities.

Record data in the approved electronic database or on standardized paper data sheets.

Ensure QA procedures are completed for each data sheet.

Coordinate QC review of each data sheet.

Field crew Record data in the approved electronic database or on standardized paper data sheets.

Perform field data collection in accordance with the protocol.

Apply the required measurement techniques consistently.

Complete QA procedures for each data sheet.

Data entry Enter data from paper data sheets into an approved digital dataset suitable for analysis.

Data analyst Review datasets for completeness, consistency, and analysis readiness.

Maintain lookup tables for species codes, functional groups, species status, invasive status, and thresholds.

Calculate metrics, including cover, richness, structure, functional groups, and threshold comparisons.

Summarize results by plot, community type, treatment area, WMA, and survey year.

Prepare tables, figures, maps, and visual summaries for reporting and adaptive management.

Document methods, assumptions, limitations, transformations, and data flags.

Resolve data questions with the WMA habitat biologist and quality reviewer before finalization.

Report author Compile monitoring results, data summaries, photographs, maps, and figures for reporting.

Draft methods, site conditions, treatment context, results, and key findings.

Interpret results with the data analyst and WMA habitat biologist.

Summarize threshold comparisons, trends, uncertainties, and data limitations.

Document adaptive management considerations and recommended follow-up actions.

Ensure content is clear, consistent, technically accurate, and aligned with protocol terminology.

Coordinate review, resolve comments, and finalize the report for distribution.

Quality reviewer Perform QC review of each data sheet.

DATA MANAGEMENT

Data management will support accuracy, comparability, and long-term use. Field data will be recorded on standardized forms or in controlled digital systems that minimize transcription error and promote consistency across crews and sampling years. Metadata will be included in each record, and one accepted taxonomic reference will be maintained in a controlled species list. Raw observations, cleaned datasets, metadata, lookup tables, photographs, and derived summaries will be stored separately so source data, processing history, and analytical outputs remain distinct. Photographs will be named systematically and linked to plot identifiers, sampling dates, and cardinal or azimuth directions.

QA/QC will be applied through daily field review, data entry or upload checks, and periodic reviewer checks. Raw data will not be overwritten. Cleaned datasets will be retained as dated versions, and all edits, corrections, and flags will be traceable. Responsibility will be assigned for file organization, access permissions, backups, metadata completion, and long-term availability. Archived materials will include field forms, photographs, maps, data tables, data analysis scripts, plot establishment records, and relocation notes.

CALCULATING METRICS

Metrics will be calculated from data collected using core methods to summarize vegetation composition, structure, ground surface condition, and species occurrence. These calculations will support comparison among plots, vegetation community types, treatment areas, and sampling years and will provide the basis for evaluating treatment response, tracking changes over time, and comparing monitoring results to adaptive management thresholds.

Within each monitoring plot, transects are treated as subsamples (replicates) used to capture spatial variability within the plot, rather than independent sampling units. All vegetation metrics (e.g., percent cover, species richness, vegetation structure measures) will therefore be summarized at the plot level by combining values across transects. Treating individual transects as independent samples in analysis would constitute pseudoreplication because they are not independent of one another but instead represent repeated measurements within the same plot. Summarizing data at the plot level ensures that analyses reflect the intended sampling design and support appropriate interpretation of vegetation condition and change over time.

Species Identity

To support interpretation, species will be categorized prior to metric calculation or data analysis by functional group (graminoids, forbs, shrubs, trees, lichens, mosses, biocrusts), status (desirable, undesirable), origin (native, non-native), classification as species of management concern (yes, no), rarity

(rare, common), and invasive species rating (listed status) (MADFW 2026f).

Line-Point Intercept

Data collected during line-point intercept will be used to calculate percent cover of species, functional groups, and ground cover types, as well as structural distribution of vegetation and the height of specific vegetation groups. Vegetation height summaries may be based on all measurements, including points where no vegetation is present and height is recorded as 0 cm, or may be calculated separately for woody vegetation, herbaceous vegetation, or individual species, depending on the management question.

1. Absolute percent cover: Calculate percent cover as the total number of hits recorded divided by the total number of intercept points per plot (e.g., 100). Percent cover may be calculated for the following metrics:

a. Percent cover of target species (e.g., those included in adaptive management thresholds)

b. Percent cover by functional group

c. Percent cover by ground cover type (e.g., bare ground, litter, moss/lichen, woody debris)

2. Relative percent cover (vegetation composition): Calculate relative percent cover by dividing the absolute cover of each species by the total absolute cover of all species (i.e., the sum of the absolute cover values for all identified species) and multiplying by 100.

3. Two common approaches are used to calculate percent cover from line-point intercept data when multiple vegetation layers are recorded:

a. Top-hit (canopy) percent cover: Only the first species intercepted at each point is counted, representing the vertical projection of vegetation to the ground surface. Calculate top-hit percent cover as the number of top hits for each species divided by the total number of sampling points. The top-hit relative percent cover is then the proportion of top vegetation hits attributed to each species. This approach avoids double counting and produces values that approximate true canopy cover.

b. Any-hit (multilayer) percent cover: All species intercepted along the pin (i.e., all height layers) are included, so individual points may contribute multiple hits. Calculate any-hit percent cover as the total hits per species divided by the total sampling points. The any-hit relative cover is then the proportion of total hits across all species. This method captures vertical structure and understory contributions, but the any-hit total percent cover can exceed 100% and reflects species representation within the canopy profile rather than projected ground cover.

4. Vegetation height: Summarize the distribution of vegetation among height classes (e.g., ground layer, 0 to 1 m, 1 to 2 m, 2 to 5 m, and greater than 5 m) to describe the vertical structure.

a. Height class distribution by functional group: Calculate the percent cover of each functional group within each height class by dividing the number of intercepts recorded for a functional group in a given height class by the total number of intercept points and multiplying by 100. Summarize results separately for trees, shrubs, forbs, graminoids, and other functional groups to characterize vertical vegetation structure.

b. Height class distribution by species of interest: For species of interest, calculate the percent occurrence in each height class as the number of intercepts where the species was recorded within a given height class divided by the total number of intercepts where the species was recorded across all height classes, multiplied by 100. This metric describes the vertical distribution of the species.

c. Species richness by height class: Calculate species richness within each height class as the total number of unique species recorded within the height class.

Plant Species Inventory

Data collected during the plot-level species inventory can be used to summarize species richness, functional-group composition, species of management concern, and invasive species abundance. These summaries support interpretation of biodiversity, management response, and the need for additional monitoring or treatment.

1. Species richness: Calculate species richness as the total number of species recorded within the plot, with each species counted only once. Include unknown plants as separate taxa if they are distinct and recorded consistently. Include species recorded during the line-point intercept if they were not captured during the species inventory and if the transects were fully contained within the inventory plot. Note that species richness is one indicator of biodiversity, but it must be interpreted in ecological context and should not be compared directly across plots with different soils, climate, or landscape position. Richness may also be influenced by within-plot heterogeneity, disturbance history, and the presence of undesirable or invasive species.

2. Species percent cover: Calculate species percent cover as the midpoint value for each assigned cover class, as shown in Table 4. For each species, convert the recorded cover class to its corresponding midpoint percent cover value before summarizing cover by species, functional group, status, invasive species rating, or other management category. Midpoint values may be summarized by plot, vegetation community type, treatment area, WMA, or survey year to support trend evaluation and comparison with management thresholds where appropriate.

Because midpoint values are derived from cover class ranges rather than exact measurements, they should be interpreted as approximate estimates and not as precise percent cover values.

Exact percent cover values will be obtained from line-point intercept data. The primary purpose of cover class estimates in the plot-level plant species inventory is to capture uncommon, infrequent, or recently established species that may be missed during line-point intercept sampling and to provide a rapid assessment method compared to the more time-intensive line-point intercept method.

3. Species of management concern: Identify and record the presence or absence of species of management concern within the plot.

DATA STRUCTURE

The following example tables are illustrate how monitoring information should be organized in a relational format, with consistent identifiers linking plot metadata (Table 7), treatment history (Table 8), line-point intercept records (Table 9), plot-level species inventory data (Table 10), and species attribute tables (Table

11).

Table 7. Example Data Structure to Document Plot Description Information

Metadata Field Description Example / Format

WMA WMA name Montague Plains

Management unit Management or treatment unit identifier MU01

Plot ID Unique permanent plot identifier P001

Observer Person or crew collecting data J. Smith

Date Date of plot description or sampling YYYY-MM-DD

Sample year Monitoring year YYYY

Treatment type Management action associated with the plot Fire, mow, thin, woody removal, invasive control

Treatment year Year treatment occurred YYYY

Years since treatment Time between sampling and most recent treatment #

Transect ID Transect identifier within the plot T01-T04

Intercept point Intercept point number along the transect 1–25

Table 8. Example Data Structure for Treatment History

Plot ID Treatment Type

Treatment Year

Treatment Date

Treatment Extent

Treatment Intensity/Severity

Treatment Notes

P001 Fire 2019 2019-MM-DD Entire management unit Low/moderate –

P001 Fire 2022 2022-MM-DD Entire management unit High –

P001 Invasive control 2024 2024-MM-DD Herbicide spotted knapweed Low –

P002 Mow 2021 2021-MM-DD Partial management unit High –

P002 Thin 2024 2024-MM-DD Partial management unit Moderate –

Table 9. Example Data Structure for Line-Point Intercept

Plot ID Sample Year Transect Intercept Point Species or Ground Layer Code* Height Class

P001 2019 T1 1 PIRI >5 m

P001 2019 T1 1 PIRI 2–5 m

P001 2019 T1 1 POTR5 2–5 m

P001 2019 T1 1 S Ground layer

P001 2019 T1 2 PIRI 2–5 m

P001 2019 T1 2 GABA 1–2 m

P001 2019 T1 2 R Ground layer

* Reference NRCS (2026b) for species codes. Ground cover codes: S = soil, R = rock.

Table 10. Example Data Structure for Plot-Level Plant Species Inventory

Plot ID Sample Year Species or Ground Layer Code* Height Class Cover Class

P001 2019 PIRI >5 m 2

P001 2019 PIRI 2–5 m 4

P001 2019 POTR5 2–5 m 5

P001 2019 GABA 1–2 m 2

P001 2019 R Ground layer 2

P001 2019 S Ground layer 4

* Reference NRCS (2026b) for species codes. Ground cover codes: S = soil, R = rock.

Table 11. Example Data Structure for Species Identity

S p e c ie s

C o d e

S c ie n ti fi c

N a m e m m n

N m

F u n c ti o n a l

G ro u p

W M

A

V g e ta ti m m u n it y

S ta tu

O ri g in e c ie s o f

M a n a g e m e n t

C o n c e rn

R ri ty

In v a s iv e c ie

L is ti g

PIRI Pinus rigida

Pitch pine

Tree Montague Plains

Pitch pine-scrub oak

Desirable

Native

Yes

Common Not invasive

* Reference NRCS (2026b) for species codes.

A-1

Glossary

Absolute percent cover: The percentage of the ground surface covered by the vertical projection of plant foliage or stems. Because plants can overlap, the absolute percent cover of all plants in an area can add up to more than 100%.

Adaptive management threshold: A predefined value, range, or condition used to evaluate whether monitoring results are consistent with management objectives or indicate the need for further review or management action.

Azimuth: A horizontal angle measured clockwise from a reference direction, typically true north, used to describe compass direction. Azimuth is expressed in degrees from 0° to 360°, where 0° is north, 90° is east, 180° is south, and 270° is west.

Baseline condition: The documented condition of a monitoring plot, vegetation community, or treatment area before treatment or before repeated monitoring comparisons are made.

Calibration: A field training and consistency-check process used to ensure observers apply monitoring methods in the same way.

Canopy: The uppermost vegetation layer in a forest or woodland, formed by the crowns of trees.

Coarse woody debris: Dead woody material on the ground, such as branches, logs, or large sticks, recorded as a ground surface category.

Community: A recurring group of species associated with particular environmental conditions.

Communities are described by attributes such as structure, diversity, dominance, and characteristic or indicator species.

Cover class: A numeric code used to represent a range of estimated percent cover for a species, functional group, vegetation layer, or ground surface category within a monitoring plot. This protocol uses modified Daubenmire cover classes: 1 = <1%, 2 = 1%–5%, 3 = 5%–15%, 4 = 15%–25%, 5 = 25%–50%, 6 = 50%–75%, and 7 = 75%–100%. These ranges balance ecological interpretability with field practicality by grouping visually estimated cover into standardized categories rather than requiring exact percentages. Numeric class codes are used to make data collection faster, simpler, and more consistent in the field. Cover classes will be used at the plot-level during the plant species inventory assessment.

Desirable species: A plant species that is consistent with the target natural community condition, habitat objectives, or desired vegetation structure for a site. Desirable species may include native species that are characteristic of the natural community habitat target, support habitat function, contribute to species diversity or structural complexity, or indicate progress toward management goals. A species may be considered desirable in one habitat target if it is expected to occur in the reference condition or target community, even if it is less desirable or not a focus in another habitat type.

Disturbance: A natural or human-caused event or process that alters vegetation, soils, resource availability, or ecological interactions. Examples include logging, fire, windthrow, drought, and deer over-browse.

Forb: A broad-leaved herbaceous plant that is not a graminoid. Ferns and fern allies may also be treated as herbaceous vegetation.

A-2

Functional group: A category of species with similar growth form or ecological role, such as graminoids, forbs, shrubs, trees, mosses, lichens, or biocrusts.

Graminoid: A plant with a grass-like growth form, including grasses, sedges, rushes, cattails, irises, and related groups.

Grassland: Vegetation dominated by grasses and other graminoids, often with forbs and short shrubs.

Height class: A defined vegetation height category used to summarize vertical structure.

Herbaceous vegetation: Nonwoody vascular plants, including forbs, graminoids, ferns, and fern allies such as horsetails and clubmosses.

Indicator species: A species strongly associated with a particular natural community type, such that its presence helps indicate that community. Indicator species may be uncommon and are not necessarily present in every occurrence of the community type.

Hit (Intercept): A contact between the vertically placed sampling pin (or sight line for trees) and a vegetation or ground-cover element at a sampling point. A hit is recorded whenever a tree is viewed through the tube densitometer, or a pin touches a plant part, or litter, rock, bare ground, woody debris, moss, lichen, or other designated cover category.

Intercept point: A fixed point along a transect where vegetation or ground surface data are recorded.

Invasive species: A non-native plant, animal, or pathogen whose introduction causes, or is likely to cause, environmental or economic harm.

Landscape: The area surrounding a community occurrence, evaluated by its natural or developed condition and the extent to which ecological processes such as fire, flooding, and animal movement can occur.

Layer: A vertical vegetation category based on plant height, such as the ground, herbaceous, shrub, subcanopy, or canopy layer. Each layer includes plants within that height range.

Line-point intercept: A vegetation sampling method in which plant species and ground surface categories are recorded at fixed points along a transect to estimate percent cover and vegetation structure.

Management unit: A defined area used for planning, implementing, and evaluating management actions.

Mesic: Describes sites or habitats with moderate soil moisture conditions, intermediate between dry xeric conditions and wet or saturated conditions.

Metadata: Supporting information that describes how, when, where, and by whom monitoring data were collected.

Midpoint value: The representative percent cover value assigned to the midpoint of a cover class range for summarizing and analyzing plot-level species inventory data.

Monitoring plot: A fixed, relocatable sampling area, typically marked and georeferenced, within which standardized monitoring methods are repeated over time to document vegetation composition, structure, ground surface conditions, and response to management actions.

A-3

Native species: A plant species that occurs naturally in a region, habitat, or ecosystem without human introduction, either historically or currently. Native species are part of the natural flora of the area and may contribute to the composition, structure, and ecological function of the target natural community. A species may be native to Massachusetts but still not be desirable in every habitat target if it is not characteristic of, or is expected to occur only at low cover within, that natural community.

Natural community: A recurring assemblage of plant and animal species that occurs in association with particular environmental conditions such as soils, moisture, topography, climate, and natural disturbance processes. Natural communities are characterized by their species composition, vegetation structure, ecological processes, and landscape setting. In this protocol, the natural community target provides the reference condition for evaluating whether observed vegetation composition and structure are consistent with desired habitat conditions and management objectives.

Non-native species: A plant species that occurs outside its natural or historical range because of intentional or accidental human introduction. Non-native species are not necessarily invasive; some may persist at low cover or have limited ecological effects. In this protocol, non-native status identifies species origin, whereas invasive status identifies non-native species that spread aggressively or cause environmental, economic, or management concern.

Percent cover: The percentage of ground or sky occupied by a plant species or vegetation layer within a defined area. Total cover for a layer may exceed 100% when calculated from individual species because plant canopies can overlap.

Permanent plot: A fixed monitoring location that is marked or georeferenced so the same area can be relocated and resampled over time.

Photograph point – A fixed location and direction from which repeat photographs are taken to document visual change over time.

Pseudoreplication: The treatment of subsamples, such as transects within one plot, as independent samples when they are not statistically independent.

Redoximorphic features: Soil color patterns formed by the reduction, movement, and oxidation of iron and manganese under alternating saturated and aerated conditions. These features are primary visual indicators of hydric soils.

Relative percent cover: The proportion of total vegetation cover that is made up of a particular plant species. Unlike absolute percent cover, relative percent cover always sums to exactly 100% for all plants within an area.

Shrubland: Vegetation dominated by shrubs, typically with shrub cover greater than 25% and tree cover less than 25%.

Structure: The vertical and horizontal arrangement of vegetation and other living and nonliving features within a community.

Targeted sampling: Deliberate selection of monitoring locations based on ecological, geographic, or management criteria rather than random placement.

Tree: A woody plant, typically with a single main stem, that generally reaches a height of more than 5 m at maturity.

A-4

Treatment area: A defined area where a management action, such as prescribed fire, mowing, woody vegetation removal, thinning, or invasive species control, has occurred or is planned.

Transect: A measured line used to guide systematic vegetation sampling and locate repeatable intercept points within a monitoring plot.

Tube densitometer: A sighting tool used to estimate tree canopy cover vertically above an intercept point.

Undesirable species: A plant species that is inconsistent with the target natural community condition or management objectives for a site. This may include nonnative species that are not listed as invasive and native species that increase disproportionately because of disturbance, altered herbivory, or other site changes. Undesirable species may be absent from, or uncommon or expected to occur only at low cover within, the natural community habitat target, even if they are native or appropriate in other habitats.

Vegetation: All the plants of an area considered collectively.

Vegetation community type: A recurring vegetation assemblage associated with particular environmental conditions and used as a unit for organizing monitoring and evaluating management objectives.

Xeric: Of, characterized by, or adapted to extremely dry conditions.

Vegetation Monitoring Protocol for Terrestrial Habitats in Wildlife Management Areas

B-1

Field Equipment and Gear List

Standard Field Equipment and Gear List for Vegetation Monitoring

Category Required Items Optional or Situational Items

Purpose / Notes

Data collection and records

Approved electronic data-collection device or standardized field forms;

clipboard or field notebook; pencils or backup writing tools

Waterproof paper; tablet case;

extra forms; backup power for field devices

Supports consistent field recording, metadata capture, and backup documentation across all methods

Navigation and plot relocation

GPS unit or approved location device;

high-precision GPS device (for example, Geode), when used;

compass; maps or aerial imagery;

measuring tape(s)

Backup GPS unit; clinometer;

rangefinder; metal detector for relocating low-profile markers

Used to locate permanent sampling units, verify azimuths, lay out plots and transects, and support revisit relocation

Photographic documentation

Camera or mobile device; photograph ID board; dark marking pen or dry-erase marker; measuring tape(s)

Extra memory card; tripod;

spare camera battery

Used to collect standardized repeat photographs for plot documentation and interpretation

Plot establishment and marking

Steel stakes; plot markers or flagging where permitted; low-profile permanent metal survey tags or rebar; marker labels; spray paint where allowed;

shovel for soil sampling

Rebar caps; mallet;

replacement tags; metal detector

Used to establish, identify, and maintain permanent plot centers and transects for revisits

Power and equipment protection

Spare batteries or charging capacity;

protective cases; weather protection for instruments and forms

Portable battery pack; dry bags

Reduces preventable data loss and helps maintain equipment functionality in the field

Safety and site-specific gear

Communication device; first-aid kit;

water; weather-appropriate clothing;

personal protective equipment required by site conditions

Tick protection; sun protection; post-burn gear;

gaiters; hard hat

Required gear should reflect current weather, terrain, burn conditions, biological hazards, and access constraints

Species identification and specimen handling

Plant identification keys and field guides; pin flags to mark unknown plants

Sample bags; labels; voucher materials when collection is authorized; hand lens

Supports species verification and documentation of uncertain identifications during plot-level inventory and line-point intercept

Vegetation sampling

Line-point intercept pin or rod; tube densitometer; measuring tape(s);

stopwatch; pin flags; graduated survey rod or height stick; 10-cm ruler.

Meter-stick for tall vegetation;

line-intercept tape; quadrat frame; cover pole; stem counter; hand lens

Required items depend on the selected core and supplemental methods, including line-point intercept, species inventory, and vegetation height

Field Equipment and Gear List