Tree density, size, and composition data for mixed-conifer forest in the Deschutes and Ochoco National Forests

This data publication contains 171 site samples of tree density measurements recorded in mixed-conifer forests of central Oregon in the Deschutes and Ochoco National Forests collected in the summers of 2009 and 2010. Density measurements are available for three common species and all other species: 1) grand and white fir; 2) ponderosa pine; 3) Douglas-fir; and 4) all species not including grand fir, white fir, ponderosa pine or Douglas-fir. Data are also available in four diameter at breast height classes: 10-29.9 centimeters (cm), 30-49.9 cm, 50-69.9 cm, and >70 cm.These data were collected to describe and identify current structure and composition of mixed-conifer forests and successional trajectories following fire exclusion and logging.Original data are currently archived with Andrew Merschel at Oregon State University: 321 Richardson Hall 3200 SW Jefferson Way Corvallis, OR, USA 97333 Original metadata date was 12/01/2014. Minor metadata updates on 12/13/2016 and 02/03/2017.

本数据集收录了2009年与2010年夏季，在美国俄勒冈州中部德舒特国家森林公园（Deschutes National Forest）及奥乔科国家森林公园（Ochoco National Forest）的混合针叶林（mixed-conifer forests）内采集的171处林木密度（tree density measurements）实测样地数据。本次实测的密度数据涵盖4类统计对象：1）壮丽冷杉（grand fir）与白冷杉（white fir）；2）美国黄松（ponderosa pine）；3）花旗松（Douglas-fir）；4）除上述三类树种外的所有其他树种。数据同时按4个胸径（diameter at breast height）径级进行分组：10–29.9厘米（cm）、30–49.9 cm、50–69.9 cm及>70 cm。本数据集的采集旨在阐明并识别该区域混合针叶林的当前结构与组成，以及火抑制（fire exclusion）与采伐（logging）活动后的森林演替轨迹（successional trajectories）。原始数据目前由俄勒冈州立大学的Andrew Merschel保管存档，存档地址为：美国俄勒冈州科瓦利斯市西南杰斐逊大道3200号理查森大厅321室，邮编97333。元数据（metadata）初始创建日期为2014年12月1日，并分别于2016年12月13日与2017年2月3日进行了小幅更新。