arbres.csv

This repository contains two datasets collected as part of a research project on the ecology of the black woodpecker (Dryocopus martius). The aim of the projet was to determine the criteria that influence tree excavation by the blackwoodpeck and the occupation of the cavities it creates.<br><b>Tree dataset (arbres.csv)</b>This file contains measurements taken on excavated and non excavated trees. The variables include: Tree ID number (arbre)Study site code (site)Diameter at brest heigth (DBH)Heigth of the first branch (H1eb)Canopy surface area (canopee)Excavation criterion (1= excavated and 0= not excavated)Uniform angle index (W) Mingling index (M)<br><b>Cavity dataset (loges.csv)</b>This file contains measurements taken on 20 cavities excavated by the Black woodpecker. The variables include : <br>Cavity ID number (nid)Tree ID (arbre)Study site code (site)Mean, minimum and maximum Cavity heigth on the tree (hauteur fut moy; hauteur fut min; hauteur fut max)Mean, minimum and maximum horizontal entrance diameter (diametre h moy; diametre h min; diametre h max)Mean, minimum and maximum vertical entrance diameter (diametre v moy; diametre v min; diametre v max)Mean, minimum and maximum horizontal cavity depth (prof h moy; prof h min; prof h max)Mean, minimum and maximum vertical cavity depth (prof v moy; prof v min; prof v max)Number of holes assosiated with the cavity (ouvertures)Occupation criterion (1= occupied, 0=unoccupied)