See abstract. Hubbard Brook Metagenomes

We assessed soil denitrification in distinct forest stands at the Hubbard Brook Experimental Forest (HBEF) in New Hampshire. Soils were taken from 1) three soil depths (combined Oi/Oe, combined Oa/A, upper mineral B layer), 2) at three elevations (Spruce fir, High elevation Hardwoods, and Lower elevation Hardwoods) 3) in two watersheds (reference, treated previously with wollastonite (CaSiO3) to increase soil pH).本研究针对美国新罕布什尔州哈伯布鲁克实验林（Hubbard Brook Experimental Forest, HBEF）内不同林分的土壤反硝化作用开展了评估。供试土壤的采样覆盖以下三类梯度条件：1）三种土壤深度层次，即合并的Oi/Oe层、合并的Oa/A层以及上部矿质B层；2）三种海拔生境，分别为云杉冷杉林、高海拔阔叶林与低海拔阔叶林；3）两个流域，包括对照流域以及此前通过施用硅灰石（wollastonite, CaSiO3）以提升土壤pH的处理流域。