Spatial patterns of understory vegetation and soil in an Alaskan upland boreal forest fire chronosequence. Three sites located in Delta Junction Alaska. Soil sampled during summer 2007

In this study we used geostatistics to characterize the spatial heterogeneity of soil carbon and nitrogen pools, microbial respiration, microbial biomass, nitrogen mineralization, soil moisture, soil pH, depth of organic horizon and forest floor covers and understory vegetation abundances in three sites (1999, 1987 and 1920 wildfires) of a boreal forest chronosequence of Interior Alaska (near Delta Junction). Soil sampling and vegetation measurements occured during summer 2007.

本研究采用地质统计学(geostatistics)方法，对阿拉斯加内陆(Interior Alaska)（德尔塔章克申(Delta Junction)附近）的寒温带针叶林时间序列(chronosequence)样地中的3个野火迹地（分别对应1999年、1987年及1920年野火）的土壤碳氮库(soil carbon and nitrogen pools)、微生物呼吸(microbial respiration)、微生物生物量(microbial biomass)、氮矿化作用(nitrogen mineralization)、土壤含水量(soil moisture)、土壤pH值(soil pH)、腐殖质层厚度(depth of organic horizon)、枯落物覆盖度(forest floor covers)及林下植被多度(understory vegetation abundances)的空间异质性(spatial heterogeneity)进行了表征。土壤采样(soil sampling)与植被调查(vegetation measurements)工作于2007年夏季开展。