Specific leaf area is lower on ultramafic than on neighbouring non-ultramafic soils
Specific leaf area is lower on ultramafic than on neighbouring non-ultramafic soils
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DOI：
10.1080/17550874.2022.2160673
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发表时间：
2022-12
影响因子：
1.5
通讯作者：
Thomas J. Samojedny;Claudia Garnica-Díaz;Dena L. Grossenbacher;G. Adamidis;P. Dimitrakopoulos;S. Siebert;M. Spasojevic;C. Hulshof;N. Rajakaruna
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作者：
Thomas J. Samojedny;Claudia Garnica-Díaz;Dena L. Grossenbacher;G. Adamidis;P. Dimitrakopoulos;S. Siebert;M. Spasojevic;C. Hulshof;N. Rajakaruna
比叶面积（SLA）是叶经济谱中描述植物性能和生产力差异的核心性状。对叶经济谱和SLA变化来源的研究主要集中在气候上。关于SLA在不寻常的土壤环境中的变化，如超镁铁质土壤，知之甚少。目的确定超镁铁质土壤作为SLA变化的驱动力的作用。方法：我们测量了地球仪周围五个地理上不同的地区成对的超镁铁质和非超镁铁质土壤中优势种的SLA，并将平均SLA值与全球报告的值进行了比较。结果除波多黎各外，所有地区超镁铁质土壤的SLA均低于非超镁铁质土壤，气候和土壤均是SLA的重要驱动因素。在五个区域中的三个区域，超镁铁质土壤的SLA值低于全球平均值。土壤和气候是SLA的主要驱动因素。超镁铁质土壤上的低SLA表明了抗胁迫策略的选择。此外，在某些生物区，超镁铁质土壤的SLA值是地球上最低的，因此代表了全球罕见的表型，应该在这些独特的土壤生境中得到保护。
ABSTRACT Background Specific leaf area (SLA) is a core trait within the leaf economic spectrum that describes differences in plant performance and productivity. Research on the sources of variation in the leaf economic spectrum and SLA has primarily focused on climate. Much less is known about SLA variation across unusual edaphic environments, such as on ultramafic soils. Aims To determine the role of ultramafic soils as a driver of SLA variation. Methods We measured SLA for dominant species on paired ultramafic and non-ultramafic soils in five biogeographically distinct regions around the globe and compared mean SLA values to globally reported values. Results SLA was lower on ultramafic than on non-ultramafic soils in all regions, except Puerto Rico, and both climate and soil were important drivers of SLA. For three of the five regions, SLA values on ultramafic soils were lower than the global average. Conclusions Soils can be a major driver of SLA along with climate. Low SLA on ultramafic soil points to selection for stress resistance strategies. Furthermore, in some bioregions, SLA values on ultramafic soils were among the lowest on the planet and thus represent globally rare phenotypes that should be conserved within these unique edaphic habitats.