Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE): Litterfall mass 2009-2022

This dataset describes litterfall mass collected in the Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE) study in New Hampshire from fall 2009 through summer 2022. Litter was collected three times per year: fall (late October or early November), spring (June), and summer (August). Fall litter was sorted by species in a subset of stands. This data package also includes the R code used to impute missing data for analysis, a manually edited data file used in the R code flow, and a file matching the labels for litterfall collectors from the original (pre Fall 2011) and current (Fall 2011 and onwards) labeling systems. All collectors have the most current label if known for all years of data. Additional detail on MELNHE, including a table of stand descriptions, project description, and a diagram of plot configuration can be found in this data package: Yanai, R.D., M. Fisk, and T.J. Fahey. 2024. Multiple Element Limitation in Northern Hardwood Ecosystems (MELNHE): Project description, plot characteristics and design ver 2. Environmental Data Initiative. https://doi.org/10.6073/pasta/6cc8a39d052834c030650fb29937bf4f (Accessed 2024-10-17). Litterfall chemistry data for a subset of these samples can be found in the following data package: Fisk, M.C., R.D. Yanai, S.D. Hong, C.R. See, and S. Goswami. 2022. Litter chemistry and masses for the MELNHE NxP fertilization experiment ver 1. Environmental Data Initiative. https://doi.org/10.6073/pasta/8b2975a3a02cbcfb1b0a12ac954576d4 (Accessed 2024-06-09). These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.本数据集记录了2009年秋季至2022年夏季，在新罕布什尔州开展的北部硬木生态系统多元素限制（Multiple Element Limitation in Northern Hardwood Ecosystems，缩写MELNHE）研究中采集的凋落物量。该凋落物每年采样三次：秋季（10月末或11月初）、春季（6月）与夏季（8月）。在部分样地中，秋季凋落物已按物种进行分类。 本数据包还包含用于分析缺失数据插补的R代码、R代码流程中使用的人工编辑数据文件，以及匹配2011年秋季前（原始编号系统）与2011年秋季起（现行编号系统）的凋落物收集器标签文件。若已知所有采样年份的收集器信息，则所有收集器均已使用最新编号。 有关MELNHE的更多细节，包括样地描述表、项目说明以及样地配置示意图，均可在本数据包中查阅： Yanai RD、Fisk M与Fahey TJ，2024。北部硬木生态系统多元素限制（MELNHE）：项目说明、样地特征与设计 版本2。环境数据倡议组织（Environmental Data Initiative）。https://doi.org/10.6073/pasta/6cc8a39d052834c030650fb29937bf4f（2024年10月17日访问）。 部分样品的凋落物化学数据可在以下数据包中获取： Fisk MC、Yanai RD、Hong SD、See CR与Goswami S，2022。MELNHE氮磷施肥实验的凋落物化学与质量 版本1。环境数据倡议组织（Environmental Data Initiative）。https://doi.org/10.6073/pasta/8b2975a3a02cbcfb1b0a12ac954576d4（2024年6月9日访问）。 本数据集采集自哈伯布鲁克生态系统研究（Hubbard Brook Ecosystem Study，缩写HBES）项目。HBES是哈伯布鲁克实验林的协同研究项目，该实验林由美国农业部林务局北部研究站运营维护。