Tree Seed Data at the Hubbard Brook Experimental Forest, 1993 - ongoing

Tree seeds sorted and counted from long-term reference area litter traps are presented for 1993 until the present. These data are part of the LTER funded quantification of tree annual productivity. Our focal species for seed counts have been sugar maple, American beech and white ash. This data set allows comparison between seed production in reference sites (BB and TF) and the calcium addition watershed (W1) for these species. 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.

本数据集收录了1993年至今，从长期参照样地枯落物收集器（litter traps）中分拣并计数的树木种子数据。该数据属于长期生态研究计划（Long-Term Ecological Research, LTER）资助的树木年生产力量化研究的一部分。本次种子计数所关注的重点物种包括糖枫（sugar maple）、美洲山毛榉（American beech）与白蜡树（white ash）。本数据集可用于对比上述物种在参照样地（BB与TF）与钙添加流域（W1）中的种子产量。
本数据采集自哈伯布鲁克生态系统研究（Hubbard Brook Ecosystem Study, HBES）项目。哈伯布鲁克生态系统研究是在哈伯布鲁克实验林开展的协同研究项目，该实验林由美国农业部（United States Department of Agriculture, USDA）林务局北部研究站运营与维护。