CABO forest inventory survey data: Tree-level dendrometric properties, positions, and crown maps

README: CABO Forest Inventory Tree Data 1. Repository Summary • Title: CABO forest inventory survey data: Tree-level dendrometric properties, positions, and crown maps • Data Author(s) / Originator(s): o Primary Contact: Anna L. Crofts, [email protected] o Contributors: Sabine St-Jean, Christine I.B. Wallis, Etienne Laliberté, and Mark Vellend • Last Update: 2025-12-09 • License: Creative Commons Attribution (CC BY 4.0) – Users are free to share and adapt the data, provided they give appropriate credit to the authors. 2. Data Citation • Suggested Citation: Crofts, A.L., St-Jean, S., Wallis, C.I.B., Laliberté, E. & Vellend, M. (2025). CABO forest inventory survey data: Tree-level dendrometric properties, positions, and crown maps [Dataset]. Zenodo. https://doi.org/10.5281/zenodo.17818756 3. Data Collection & Methods • Study Location(s): Parcs nationaux des Mont-Saint-Bruno (45.5513° N, 73.3472° W) and Mont-Mégantic (45.4240° N, 71.1248° W), Québec, Canada • Time Period: • Sampling Design: The sampling was conducted according to the Canadian Airborne Biodiversity Observatory (CABO) Forest Inventory Field Survey Protocol V.2. In brief, forest inventory plots (~706 m2) were systematically distributed to span the range of conditions present within the study areas (n = 15 at Mont-Saint-Bruno and n = 50 at Mont-Mégantic). Methods Overview: We quantified the tree community defined as all individuals whose crowns extended into the general level of the canopy and those whose crowns were below the canopy but had a diameter at breast height (DBH) greater than 9 cm. Individuals were identified to species, positioned in relation to the plot center, and a suite of dendrometric properties (e.g., DBH, height) were quantified. Please refer to CABO Forest Inventory Field Survey Protocol V.2 for detailed methods. Crofts, A.L, St-Jean, S. & Vellend, M. (2022). Canadian Airborne Biodiversity Observatory (CABO) Forest Inventory Field Survey Protocol V.2 [Protocol]. Protocols.io. dx.doi.org/10.17504/protocols.io.q26g7rn23vwz/v2. 4. File Manifest & Data Structure • File List: o CABO_forests_tree_survey_metadata.csv o CABO_forests_tree_survey_dataset.csv o CABO_forests_tree_survey_crowns.gpkg • Key Relationships: Files can be joined using “plot_id” or “plot_field_id”. 5. Variable Descriptions • CABO_forests_tree_survey_metadata.csv Variable Name Description site_id The study site the spectral data was acquired (Categorical; 2 levels: Mont Mégantic = “MtMeg-1” and Mont-St-Bruno = “MSB-forest-crew”). plot_id Unique numeric identifier for each surveyed plot. This field serves as the Primary Key for joining (linking) this dataset with the CABO_forests_tree_survey_dataset.csv file and the CABO_forests_tree_survey_crowns.gpkg geospatial file. plot_field_id Unique text identifier for each surveyed plot (Categorical; 65 levels). This field serves as the Primary Key for joining this dataset with the CABO_forests_tree_survey_dataset.csv file and the CABO_forests_tree_survey_crowns.gpkg geospatial file. plot_lon The projected longitude (x-coordinate) of plot centers (Numeric; unit is meters (m) in the specified Projection System). plot_lat The projected latitude (y-coordinate) of plot centers (Numeric; unit is meters (m) in the specified Projection System). plot_EPSG The EPSG code identifying the coordinate reference system use for the plot_lon and plot_lat variables (Categorical; 1 level). All elements are the string “32619”. plot_horizontal_accuracy_m The horizontal accuracy of plot locations, unit is meters (Numeric; unit is meters (m)). plot_shape Plot Shape (Categorical; 1 level). All elements are the string "circular". plot_diameter_m The diameter of the circular plots. (Numeric; value is 30; unit is meters (m)). date_surveyed The date the tree survey was conducted (DateTime; YYYYMM-DD). tree_size_measurements A string containing the key tree size measurements taken. total_observations The total count of individual trees and standing dead trees observed within a plot (Integer). count_alive The total count of individual trees observed within a plot (Integer). count_standing_dead The total count of standing dead trees observed within a plot (Integer). species_richness The total count of species observed within a plot (Integer). • CABO_forests_tree_survey_dataset.csv Variable Name Description site_id The study site the spectral data was acquired (Categorical; 2 levels: Mont Mégantic = “MtMeg-1” and Mont-St-Bruno = “MSB-forest-crew”). plot_id Unique numeric identifier for each surveyed plot. This field serves as the Primary Key for joining (linking) this dataset with the CABO_forests_tree_survey_metadata.csv file and the CABO_forests_tree_survey_crowns.gpkg geospatial file. plot_field_id Unique text identifier for each surveyed plot (Categorical; 65 levels). This field serves as the Primary Key for joining this dataset with the CABO_forests_tree_survey_metadata.csv file and the CABO_forests_tree_survey_crowns.gpkg geospatial file. tree_id Unique numeric identifier for each surveyed tree. tree_lon The projected longitude (x-coordinate) of tree trunks (Numeric; unit is meters (m) in the specified Projection System). tree_lat The projected latitude (y-coordinate) of tree trunks (Numeric; unit is meters (m) in the specified Projection System). tree_EPSG The EPSG code identifying the coordinate reference system use for the tree_lon and tree_lat variables (Categorical; 1 level). All elements are the string “32619”. scientific_name The scientific name and authorities of the surveyed individual (Categorical; 30 levels). species_code The species code of the surveyed individual (Categorical; 30 levels). Code follow the pattern, first two letters of the genera followed by the first two letters of the epithet. vital_status The vital status of the survey individual (Categorical; 2 levels: “Alive” and “Dead”). crown_class The crown class of surveyed individual (Categorical; 4 levels: “Dominant”, “Codominant”, “Intermediate”, and “Suppressed”). height_m The height of surveyed individual (Numeric, unit is meters (m)). dbh_cm The diameter at breast height (DBH) of the surveyed individual (Numeric, unit is centimeters (cm)). dbh_2_cm The diameter at breast height (DBH) of the second stem of the surveyed individual (Numeric, unit is centimeters (cm)). Missing values (NA) in this field indicate that the surveyed individual did not have a secondary stem. dbh_3_cm The diameter at breast height (DBH) of the third stem of the surveyed individual (Numeric, unit is centimeters (cm)). Missing values (NA) in this field indicate that the surveyed individual did not have a tertiary stem. dbh_4_cm The diameter at breast height (DBH) of the fourth stem of the surveyed individual (Numeric, unit is centimeters (cm)). Missing values (NA) in this field indicate that the surveyed individual did not have a quaternary stem. canopy_bearing_1 The bearing of the primary crown axis of the surveyed individual (Numeric, unit is degrees). canopy_distance_1_m The length of the primary crown axis of the surveyed individual (Numeric, unit is meters (m)). canopy_to_tree_trunk_m The distance between the crown edge and the trunk of the surveyed individual along the primary axis in the direction of the “canopy_bearing_1” (Numeric; unit is meters (m)). canopy_distance_2_m The length of the secondary crown axis of the surveyed individual (Numeric, unit is meters (m)). • CABO_forests_tree_survey_crowns.gpkg Variable Name Description site_id The study site the spectral data was acquired (Categorical; 2 levels: Mont Mégantic = “MtMeg-1” and Mont-St-Bruno = “MSB-forest-crew”). plot_id Unique numeric identifier for each surveyed plot. This field serves as the Primary Key for joining (linking) this dataset with the CABO_forests_tree_survey_metadata.csv file and the CABO_forests_tree_survey_crowns.gpkg geospatial file. plot_field_id Unique text identifier for each surveyed plot (Categorical; 65 levels). This field serves as the Primary Key for joining this dataset with the CABO_forests_tree_survey_metadata.csv file and the CABO_forests_tree_survey_crowns.gpkg geospatial file. tree_id Unique numeric identifier for each surveyed tree. scientific_name The scientific name and authorities of the surveyed individual (Categorical; 30 levels). species_code The species code of the surveyed individual (Categorical; 30 levels). Code follow the pattern, first two letters of the genera followed by the first two letters of the epithet. vital_status The vital status of the survey individual (Categorical; 2 levels: “Alive” and “Dead”). crown_class The crown class of surveyed individual (Categorical; 4 levels: “Dominant”, “Codominant”, “Intermediate”, and “Suppressed”). height_m The height of surveyed individual (Numeric, unit is meters (m)). dbh_cm The diameter at breast height (DBH) of the surveyed individual (Numeric, unit is centimeters (cm)). dbh_2_cm The diameter at breast height (DBH) of the second stem of the surveyed individual (Numeric, unit is centimeters (cm)). Missing values (NA) in this field indicate that the surveyed individual did not have a secondary stem. dbh_3_cm The diameter at breast height (DBH) of the third stem of the surveyed individual (Numeric, unit is centimeters (cm)). Missing values (NA) in this field indicate that the surveyed individual did not have a tertiary stem. dbh_4_cm The diameter at breast height (DBH) of the fourth stem of the surveyed individual (Numeric, unit is centimeters (cm)). Missing values (NA) in this field indicate that the surveyed individual did not have a quaternary stem. crown_EPSG The EPSG code identifying the coordinate reference system used (Categorical; 1 level). All elements are the string “32619”. geometry The spatial geometry representing the modelled crowns of surveyed individuals (Geometry/Spatial Data). 8. Related Publications • Related Publications: Crofts, A.L., Wallis, C.I.B., St-Jean, S., Demers-Thibeault, S., Inamdar, D., Arroyo-Mora, J.P., Kalacska, M., Laliberté, E., & Vellend, M. (2024). Linking aerial hyperspectral data to canopy tree biodiversity: An examination of the spectral variation hypothesis. Ecological Monographs, 94: e1605. Miraglio, T., Coops, N.C., Wallis, C.I.B., Crofts, A.L., Kalacska, M., Vellend, M., Serbin, S.P., Arroyo-Mora, J.P., & Laliberté, E. (2023). Mapping canopy traits over Québec using airborne and spaceborne imaging spectroscopy. Scientific Reports, 13: 17179. Wallis, C.I.B., Crofts, A.L., Inamdar, D., Arroyo-Mora, J.P., Kalacska, M., Laliberté, E., & Vellend, M. (2023). Remotely sensed carbon content: The role of tree composition and tree diversity. Remote Sensing of the Environment, 284: 113333. Wallis, C.I.B., Kothari, S., Jantzen, J.R., Crofts, A.L., St-Jean, S., Inamdar, D., Arroyo-Mora, J.P., Kalascka, M., Bruneau, A., Coops, N.C., Laliberté, E., & Vellend, M. (2024). Exploring the spectral variation hypothesis for a and B-diversity: A comparison of open vegetation and forests. Environmental Research Letters, 19: 064005. Wallis, C.I.B., Crofts, A.L., Jackisch, R., Kothari, S., Tougas, G., Arroyo-Mora, J.P., Hacker, P., Coops, N.C., Kalacska, M., Laliberté, E., & Vellend, M. (2025). Methodological considerations for studying spectral-plant diversity relationships. Remote Sensing of the Environment, 328: 114907. • Related Datasets: Crofts, A.L., Wallis, C.I.B., St-Jean, S., Demers-Thibeault, S., Deep, I., Arroyo-Mora, J.P., Kalacska, M., Laliberté, E. & Vellend, M. (2024). CABO forest inventory survey data: Canopy-level spectra, species abundances, and environmental conditions [Dataset]. Dryad. https://doi.org/10.5061/dryad.5mkkwh7dh Wallis, C.I.B., Crofts, A.L., Jackisch, R., Kothari, S., Tougas, G., Arroyo-Mora, J.P., Hacker, P., Coops, N.C., Kalacska, M., Laliberté, E., & Vellend, M. (2025). CABO spectral and field biodiversity data from five Canadian sites [Dataset]. Zenodo. https://doi.org/10.5281/zenodo.15868768 • Related Protocols: Crofts, A.L, St-Jean, S. & Vellend, M. (2022). Canadian Airborne Biodiversity Observatory (CABO) Forest Inventory Field Survey Protocol V.2 [Protocol]. Protocols.io. dx.doi.org/10.17504/protocols.io.q26g7rn23vwz/v2.