Data from: Climate and competition effects on tree growth in Rocky Mountain forests

Sample tree growth data with locationsThis file provides measurements of annual radial growth for randomly distributed adult trees in the Rocky Mountains of the United States. Measurements were derived from increment cores collected in 2012 and 2013. A total of 5 tree species were sampled. Sample trees were distributed across a latitudinal gradient from the southern terminus of the Rockies in New Mexico to the Canadian border in the north. Target tree species include: Abies lasiocarpa (subalpine fir), Picea engelmannii (Engelmann spruce), Pinus contorta (lodgepole pine), Pinus ponderosa (ponderosa pine) and Pseudotsuga menziesii (Douglas-fir). Annual radial increment over a 20 year period was measured in millimeters for each sample tree. File headings include: Sample tree ID: Identification code for the sample or target tree Species: Species of the sample tree Year: The year of growth Site: General location of sample tree Longitude and Latitude: Geographical coordinates of sample (based on North American Datum 1983) Elevation: Elevation above sea level in meters Aspect: Dominant terrain aspect in degrees from north Terrain slope: Average slope of land surface measured in percent Stem diameter: Diameter of tree stem at breast height (1.3 meters above root crown) in year of growth measured in centimeters Age: Age of sample in year of growth Ring width: Measured width of annual radial increment in millimeters Date collected: Month, day, and year the sample was collectedsample tree growth data with locations.csvNeighbor tree location and size dataThis file provides data describing the density and configuration of sample tree neighborhoods for calculation of competition indices. The distance to and diameter at breast height (DBH; 1.3 meters above root crown) of all neighboring trees within a 15 m radius of the sample or target tree were measured. A total of 10 sample trees had empty neighborhoods (no neighbor trees within 15 meters). File headings include: Sample tree ID: Identification code for the sample or target tree Sample tree species: Species of sample tree Neighbor tree species: Species of neighbor tree Neighbor tree DBH: Diameter at breast height of neighbor tree in centimeters Distance to neighbor tree: Distance from sample to neighbor tree in metersneighbor tree location and size data.csv

搜集汇总

背景与挑战

背景概述

该数据集研究了美国落基山脉五种常见树种（如亚高山冷杉、恩格尔曼云杉等）的生长情况，重点分析气候变量（如温度和湿度）与生物竞争对树木直径生长的影响。数据包括样本树的年径向生长测量和邻居树的位置与大小信息，覆盖从新墨西哥到加拿大边境的纬度梯度，适用于生态建模和气候变化响应研究。