Above-ground woody biomass and crown data for environmental plantings in Victoria Australia, sampled in 2022-2023 - Biomass Crown Data

This dataset stores measurements from two field campaigns in 20 environmental plantings aged 4–35 years old in Australia where stem diameters, crown radii, and heights of individual trees and shrubs were collected, and above- and below-ground woody biomass (AGB, BGB) and carbon stocks were calculated. The first measurement was undertaken by The University of Melbourne in collaboration with Land Life Company between March and June 2022 covering 14 sites aged 21-35 years in Victoria, Australia. The purpose of this field campaign was to re-evaluate the biomass carbon stock of sites previously assessed in 2000 by CSIRO within the stem diameter database (SDD; Paul et al. 2020). For each site, to ensure representative coverage, the sampling area was divided into equal-sized sectors and within each sector a random transect of 0.05 ha (100 m length by 5 m width) was laid out based on a restricted random sampling design. Two to five transects were measured per site, depending on either sampling 10% of the area or meeting Australian recommendations for minimum stem numbers for the planting configuration. In total, the dataset contains 48 transects and 4703 unique tree or shrub measurements. Stem diameters of all trees and shrubs were measured using calipers, and height (measured with a laser hypsometer) and crown radius (estimated using a measuring tape) were assessed for only a few representative trees (selected to encompass the full diameter range). […]

本数据集存储了来自澳大利亚20处环境种植地中4至35岁树龄的两项实地考察的测量数据，其中包含了单株树木和灌木的树干直径、树冠半径和高度，并计算了地上和地下木质生物质（AGB，BGB）及碳储量。首次测量由墨尔本大学与Land Life Company合作于2022年3月至6月进行，覆盖了澳大利亚维多利亚州的14个21至35岁的地点。此次实地考察的目的是重新评估2000年由澳大利亚科学和工业研究组织（CSIRO）在树干直径数据库（SDD；Paul等人，2020年）中评估过的地点的生物碳储量。为确保样本代表性，每个地点的采样区域被划分为等面积的扇区，并在每个扇区内根据限制随机抽样设计布置了0.05公顷（100米长，5米宽）的随机样带。每个地点测量了两个至五个样带，依据的是采样面积的10%或满足澳大利亚对种植配置最小树干数量的建议。总计，该数据集包含48个样带和4703个独特的树木或灌木测量值。所有树木和灌木的树干直径均使用卡尺进行测量，高度（使用激光高度计测量）以及树冠半径（使用卷尺估算）仅对部分代表性树木（旨在涵盖完整直径范围）进行了评估。