Long-term measurements of microbial biomass and activity at the Hubbard Brook Experimental Forest, 1994 - present

Long-term monitoring of soil nitrate (NO3-) and
ammonium (NH4+) concentrations, microbial biomass carbon (C)
and nitrogen (N) content, microbial respiration, potential
nitrification and N mineralization rates, and denitrification
potential has been ongoing at the Hubbard Brook Experimental
Forest since 1994. Samples have been collected in the Bear
Brook Watershed (west of Watershed 6) beginning in 1994. In
1998, our sampling regime was extended to Watershed 1 in an
effort to monitor and quantify microbial response to a
whole-watershed calcium addition. 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.

自1994年起，科研团队便在哈伯布鲁克实验林（Hubbard Brook Experimental Forest）持续开展长期定位监测工作，监测指标涵盖土壤硝酸盐（NO3-）、铵态氮（NH4+）浓度，微生物生物量碳（C）与氮（N）含量、微生物呼吸作用、潜在硝化速率、氮矿化速率及反硝化潜力。1994年起，采样工作率先在贝尔布鲁克流域（6号流域西侧）启动。1998年，为监测并量化微生物对全流域钙添加试验的响应，采样范围扩展至1号流域。本数据集作为哈伯布鲁克生态系统研究（HBES）的组成部分采集所得，该研究是依托哈伯布鲁克实验林开展的协作科研项目，该实验林由美国农业部林务局北方研究站运营维护。