Soil magnetic susceptibility reflects soil moisture regimes and the adaptability of tree species to these regimes
Soil magnetic susceptibility reflects soil moisture regimes and the adaptability of tree species to these regimes
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DOI：
10.1016/j.foreco.2007.11.034
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发表时间：
2008-04
影响因子：
3.7
通讯作者：
J. Wang;D. Grimley;Chonggang Xu;J. Dawson
中科院分区：
文献类型：
--
作者：
J. Wang;D. Grimley;Chonggang Xu;J. Dawson
淹水、饱和或排水不良的土壤常常是厌氧的，导致强磁性矿物、磁铁矿和磁铁矿的溶解，土壤磁化率(MS)相应降低。在美国伊利诺伊州中东部的5个温带落叶林的研究中，与旱地乔木树种相邻的平均表层土壤MS(31×10−5si)显著高于与洪泛平原或低地乔木树种相邻的表土MS(17×10−5si)。虽然每个树种的土壤MS平均值不同，但不同地点相关树种的土壤MS平均值的相对顺序是相似的。低地乔木，西山核桃、美国榆树、糖枫、山核桃。F.)和水曲柳Fraxinus pennsylvanica Marsh.与整个和每个地点测得的最低土壤MS平均值有关。随着土壤MS值的下降，树种的耐洪等级显著增加，公布的等级与同一物种组的土壤MS值有显著的相关性。已公布的三个树种耐涝分类与所有地点的土壤MS值显著相关，但在Allerton公园最强，该地点的土壤排水级别和MS值范围最广。在土壤母质含有相似初始水平的强磁性矿物的森林中使用土壤MS测量，可以提供一种简单、快速和定量的方法，根据含水率状况(包括干旱条件)和相关的植物成分对土壤进行分类。因此，土壤MS值有能力量化树种对氢气耐受性的连续体，并指导植树造林树种的选择。
Flooded, saturated or poorly drained soils are frequently anaerobic, leading to dissolution of the strongly magnetic minerals, magnetite and maghemite, and a corresponding decrease in soil magnetic susceptibility (MS). In this study of five temperate deciduous forests in east-central Illinois, USA, mean surface soil MS was significantly higher adjacent to upland tree species (31×10−5SI) than adjacent to floodplain or lowland tree species (17×10−5SI), when comparing regional soils with similar parent material of loessal silt. Although the sites differ in average soil MS for each tree species, the relative order of soil MS means for associated tree species at different locations is similar. Lowland tree species, Celtis occidentalis L., Ulmus americana L., Acer saccharinum L., Carya laciniosa (Michx. f.) Loud., and Fraxinus pennsylvanica Marsh. were associated with the lowest measured soil MS mean values overall and at each site. Tree species’ flood tolerance rankings increased significantly, as soil MS values declined, the published rankings having significant correlations with soil MS values for the same species groups. The three published classifications of tree species’ flood tolerance were significantly correlated with associated soil MS values at all sites, but most strongly at Allerton Park, the site with the widest range of soil drainage classes and MS values. Using soil MS measurements in forests with soil parent material containing similar initial levels of strongly magnetic minerals can provide a simple, rapid and quantitative method to classify soils according to hydric regimes, including dry conditions, and associated plant composition. Soil MS values thus have the capacity to quantify the continuum of hydric tolerances of tree species and guide tree species selection for reforestation.