Variation of key elements in soils and plant tissues in subalpine forests of the northern Rocky Mountains, USA
Variation of key elements in soils and plant tissues in subalpine forests of the northern Rocky Mountains, USA
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DOI：
10.5194/bg-2018-443
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发表时间：
2018-11
期刊：
影响因子：
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通讯作者：
David P. Pompeani;K. McLauchlan;Barrie V. Chileen;K. Wolf;P. Higuera
中科院分区：
文献类型：
--
作者：
David P. Pompeani;K. McLauchlan;Barrie V. Chileen;K. Wolf;P. Higuera
抽象。森林生态系统的结构和功能的基本元素在活组织和土壤中的比例相对可预测;然而，元素浓度的空间变异程度及其与野火历史的关系尚不清楚。量化受火灾影响的森林内活植物组织和表层土壤中营养物质浓度之间的关联，有助于确定这些元素如何有助于生物地球化学恢复力。在这里，我们提出元素浓度数据（C，N，P，K，Ca，Mg，S，Fe，Mn，Zn）植物功能类型与碳（C）和氮（N）密切相关--针叶中C浓度最高，针叶中C浓度最高，阔叶植物中N浓度最高。样品间叶的平均N / P比为9.8 ± 0.6（μ ± 95%置信度）。这表明，N是这些植物的限制性营养素，但有几个因素可以复杂的使用N / P比来评估营养状况。在1910年或1918年的区域性大火中燃烧的有机土壤层中的平均C浓度低于1901年之前燃烧的土壤层中的平均C浓度（p
Abstract. The essential elements for the structure and function of forest ecosystems are found in relatively predictable proportions in living tissues and soils; however, both the degree of spatial variability in elemental concentrations and their relationship with wildfire history are unclear. Quantifying the association between nutrient concentrations in living plant tissue and surface soils within fire-affected forests can help determine how these elements contribute to biogeochemical resilience. Here, we present elemental concentration data (C, N, P, K, Ca, Mg, S, Fe, Mn, Zn) from 72 foliar and 44 soil samples from a network of 15 sites located in the fire-prone subalpine forests of the northern Rocky Mountains, USA Plant functional type is strongly correlated with carbon (C) and nitrogen (N) – C concentrations are highest in coniferous needles, and N concentrations are highest in broadleaved plant species. The average N / P ratio of foliage among samples is 9.8 ± 0.6 (μ ± 95 % confidence). This suggests that N is the limiting nutrient for these plants, however several factors can complicate the use of N / P ratios to evaluate nutrient status. Average C concentrations in organic soil horizons that were burned in regionally extensive fires in 1910 or 1918 CE are lower than those from sites that burned prior to 1901 CE (p