Sabah Biodiversity Experiment Compiled Datasets 2002 to 2020

Summary This dataset contains the data collected from a number of experiments that were conducted within the Sabah Biodiversity Experiment (SBE) project site located within the Malua Forest Reserve in Sabah, Malaysia between 2002 to 2020. The data collected are measurements taken from 16 species of Dipterocarpaceae seedlings that were planted within the project site. These measurements largely comprise of the diameters at base and breast height of the main stems (in centimeters), the height of the main stem (in centimeters), densiometer readings to determine canopy openness, and the level of herbivory experienced by seedlings. Restrictions This data is only accessible via a data request to Michael O'Brien ([e-mail]) and Andy Hector ([e-mail]). The data collectors are expected to be included as authors on any articles that use this dataset. Version 3.0 The planting dates for some seedlings have been adjusted as they were found to fall outside of our designated planting period. Description of Columns pl: Plot number li: Line number within each plot po: Planting point on each line location: Plot location plantingdate: Date of planting surveydate: Date of survey genus: Genus of the seedling being measured species: Species of the seedling being measured genus_species: The genus and species of the seedling combined SpeciesMix: Type of species mixture (refer to planting design booklet below) survival: Did the seedling survive when measurements were being taken? O.N: Was the seedling planted before the 1st or 2nd census? (O = Seedlings planted before 1st Census, N = Seedlings planted before 2nd census and after 1st census) data_origin: The experiment or study that the measurement originated from sample: The ith sample being measured for a given study insectdamage: Level of leaf damage inflicted by herbivorous insects mammaldamage: Level of leaf damage inflicted by herbivorous mammals treefalldamage: Type of shoot damage inflicted by falling trees or branches heightapex: Measure to the tip of leader shoot (to nearest cm) diam1: Measure diameter of stem base at 5cm from the ground (to nearest cm) diam2: Same as "diam1" but at right-angle to the first measurement dbh1: Measure diameter of stem at 130cm from the ground (to nearest cm) dbh2: As with "dbh1", but at right-angle to the first measurement DN: Hemispherical densiometer measurements taken facing North DE: Hemispherical densiometer measurement taken facing East DS: Hemispherical densiometer measurement taken facing South DW: Hemispherical densiometer measurement taken facing West Notes for users Each unique combination of plot number, line number, planting point, and old/new status ("O.N") is a unique seedling. There are about 600 seedlings with no scientific name within the dataset. All of these are seedlings that are planted right before the 2nd census, but did not survive until their measurement during the 2nd census. Therefore, these are left as unknown species. The “data_origin” column refers to the studies conducted within the SBE project site which can be easily used by users for subsetting the dataframe for a specific study. These include the tree census or full measurement studies (1st and 2nd census/sample measurements; refer to Hector et al. 2011), intensive plot measurements (10 sample measurements; refer to Philipson et al. 2014), and climber cutting sample measurements (14 sample measurements; refer to O’Brien et al. 2019). We also want to mention that there are 475 seedlings with no survey dates in the 2nd census. References Hector A, Philipson CD, Saner P, Chamagne J, Dzulkifli D et al. (2011). The Sabah Biodiversity Experiment: a long-term test of the role of tree diversity in restoring tropical forest structure and functioning. Philosophical Transactions of the Royal Society B 366, 3303-3315. (link) Philipson CD, Dent DH, O’Brien MJ, Chamagne J, Dzulkifli D et al. (2014). A trait-based trade-off between growth and mortality: evidence from 15 tropical tree species using size-specific relative growth rates. Ecology and Evolution 4, 3675-3688. (link) O’Brien MJ, Philipson CD, Reynolds G, Dzulkifli D, Snaddon JL et al. (2019). Positive effects of liana cutting on seedlings are reduced during El Niño-induced drought. Journal of Applied Ecology 4, 891-901. (link) Contact For more information, please contact Dr Michael O'Brien ([e-mail])数据集概述 本数据集涵盖2002年至2020年间，在马来西亚沙巴州马卢阿森林保护区（Malua Forest Reserve）内的沙巴生物多样性实验（Sabah Biodiversity Experiment, SBE）项目场地开展的多项实验的采集数据。所采集的数据来自该项目场地内种植的16种龙脑香科（Dipterocarpaceae）幼苗的测量记录，测量指标主要包括：主茎基径与胸径（单位：厘米）、主茎高度（单位：厘米）、用于冠层开度测定的半球式冠层密度计（densiometer）读数，以及幼苗遭受的植食性损害程度。 使用限制 本数据集仅可通过向Michael O'Brien（[e-mail]）与Andy Hector（[e-mail]）提交数据申请获取。使用本数据集产出的学术论文，需将数据采集者列为作者。 版本3.0 部分幼苗的种植日期已完成调整，因原记录日期超出了项目预设的种植周期。 字段说明 - pl：样地编号 - li：每个样地内的样线编号 - po：每条样线上的种植点位 - location：样地位置 - plantingdate：种植日期 - surveydate：调查日期 - genus：被测幼苗的属名 - species：被测幼苗的种名 - genus_species：被测幼苗的属名与种名组合 - SpeciesMix：物种混合类型（详见下文种植设计手册） - survival：调查时幼苗是否存活 - O.N：幼苗是否在第一次或第二次普查前种植（O = 第一次普查前种植的幼苗，N = 第一次普查后、第二次普查前种植的幼苗） - data_origin：该测量数据所属的实验或研究 - sample：特定研究中被测量的第i个样本 - insectdamage：植食性昆虫造成的叶片损害程度 - mammaldamage：植食性哺乳动物造成的叶片损害程度 - treefalldamage：倒木或断枝造成的嫩梢损害类型 - heightapex：主茎顶端高度测量值（精确至1厘米） - "diam1"：距地面5厘米处的茎基直径测量值（精确至1厘米） - "diam2"：与"diam1"测量方向垂直的茎基直径测量值（精确至1厘米） - "dbh1"：距地面130厘米处的胸径测量值（精确至1厘米） - "dbh2"：与"dbh1"测量方向垂直的胸径测量值（精确至1厘米） - DN：朝向北方的半球式冠层密度计测量值 - DE：朝向东方的半球式冠层密度计测量值 - DS：朝向南方的半球式冠层密度计测量值 - DW：朝向西方的半球式冠层密度计测量值 用户须知 1. 样地编号、样线编号、种植点位以及新旧状态（O.N）的唯一组合对应一株唯一的幼苗。 2. 本数据集内约有600株无学名的幼苗，这些幼苗均为第二次普查前种植，但未存活至第二次普查时的测量阶段，因此标注为未知物种。 3. "data_origin"列对应SBE项目场地内开展的各项研究，使用者可借此快速筛选特定研究的数据集子集，具体包括：树木普查或全量测量研究（第一次和第二次普查/样本测量，详见Hector等，2011）、密集样地测量（10个样本测量，详见Philipson等，2014）以及藤本修剪样本测量（14个样本测量，详见O’Brien等，2019）。 4. 另有475株幼苗在第二次普查中无调查日期记录。 参考文献 Hector A, Philipson CD, Saner P, Chamagne J, Dzulkifli D 等. (2011). 沙巴生物多样性实验：树木多样性在恢复热带森林结构与功能中的长期检验. 《英国皇家学会学报B辑：生物科学》(Philosophical Transactions of the Royal Society B) 366, 3303-3315. (链接) Philipson CD, Dent DH, O’Brien MJ, Chamagne J, Dzulkifli D 等. (2014). 生长与死亡间的性状权衡：基于15种热带树木的体型特异性相对生长率证据. 《生态学与进化》(Ecology and Evolution) 4, 3675-3688. (链接) O’Brien MJ, Philipson CD, Reynolds G, Dzulkifli D, Snaddon JL 等. (2019). 厄尔尼诺干旱期间藤本修剪对幼苗的积极效应被削弱. 《应用生态学杂志》(Journal of Applied Ecology) 4, 891-901. (链接) 联系方式 如需更多信息，请联系Michael O'Brien博士（[e-mail]）