Elevation at grid points on the Luquillo Forest Dynamics Plot (LFDP)

This file contains data that describe the physical and environmental attributes of the LFDP. The attributes include elevation, topography type, and percentage slope. All data are given for the 20 m by 20 m quadrat scale. Information on soils are taken form an interpolation of the soil map produced by the Natural Resources Conservation Service, US Department of Agriculture (Soil Survey 1995). Other information from the elevation of each of the corner posts defining the quadrats. The National Science Foundation requires that data from projects it funds are posted on the web two years after any data set has been organized and "cleaned". The data from each census of the LFDP will be updated at intervals as each survey of the LFDP shows errors in the previous data collection. After posting on the web, researchers who are not part of the project are then welcome to use the data. Given the enormous amount of time, effort and resources required to manage the LFDP, obtain these data, and ensure data accuracy, LFDP Principal Investigators request that researchers intending to use this data comply with the requests below. Through complying with these requests we can ensure that the data are interpreted correctly, analyses are not repeated unnecessarily, beneficial collaboration between users is promoted and the Principle Investigators investment in this project is protected. Submit to the LFDP PIs a short (1 page) description of how you intend to use the data; · Invite LFDP PIs to be co-authors on any publication that uses the data in a substantial way (some PIs may decline and other LFDP scientists may need to be included); If the LFDP PIs are not co-authors, send the PIs a draft of any paper using LFDP data, so that the PIs may comment upon it; In the methods section of any publication using LFDP data, describe that data as coming from the "Luquillo Forest Dynamics Plot, part of the Luquillo Experimental Forest Long-Term Ecological Research Program"; Acknowledge in any publication using LFDP data the "The Luquillo Experimental Forest Long-Term Ecological Research Program, supported by the U.S. National Science Foundation, the University of Puerto Rico, and the International Institute of Tropical Forestry"; · Supply the LFDP PIs with 10 reprints of any publication using LFDP data. · Accept that the LFDP PIs can not guarantee that the LFDP data you intend to use, has not already been submitted for publication or published.

本数据集包含用于描述卢奎洛森林动态样地（Luquillo Forest Dynamics Plot，以下简称LFDP）物理与环境属性的相关数据，所涉属性包括海拔、地形类型及坡度百分比。所有数据均以20米×20米样方为尺度进行采集与展示。土壤相关数据源自美国农业部自然资源保护局（Natural Resources Conservation Service）1995年土壤调查（Soil Survey 1995）成果的插值计算结果。其余高程数据则来自划定样方的各角桩海拔测量值。
美国国家科学基金会（National Science Foundation）要求，其资助项目产生的所有数据集，需在整理并完成数据清洗后的两年内发布至网络。LFDP历次普查数据将根据后续野外调查发现的既往数据采集误差，按周期进行更新。
数据在网络发布后，非项目组成员的研究人员亦可使用本数据集。鉴于管理LFDP、获取本数据集并保障数据准确性需要耗费大量时间、人力与资源，LFDP项目首席研究员（Principal Investigators，以下简称PIs）恳请拟使用本数据的研究人员遵守以下要求：
1. 向LFDP首席研究员提交一份简短（1页）的数据分析用途说明文档；
2. 若研究成果实质性使用了LFDP数据，需邀请LFDP首席研究员作为共同作者（部分首席研究员可能会谢绝，此时可考虑纳入其他LFDP科研人员）；
3. 若LFDP首席研究员未作为共同作者，需向其发送使用LFDP数据撰写的论文草稿，以供其审阅并提出修改意见；
4. 在使用LFDP数据发表的论文方法部分中，需注明数据来源于"卢奎洛森林动态样地，隶属于卢奎洛实验林长期生态研究计划"；
5. 在使用LFDP数据发表的论文中，需致谢如下："本研究使用的卢奎洛实验林长期生态研究计划数据由美国国家科学基金会、波多黎各大学及国际热带林业研究所资助支持"；
6. 向LFDP首席研究员提供10份使用LFDP数据发表的论文抽印本；
7. 知悉并认可：LFDP首席研究员无法保证您拟使用的LFDP数据未被提交发表或已正式发表。