Leaf traits of dipterocarp species with contrasting distributions across a gradient of nutrient and light availability
Leaf traits of dipterocarp species with contrasting distributions across a gradient of nutrient and light availability
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DOI：
10.1080/17550874.2016.1265018
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发表时间：
2016-01-01
影响因子：
1.5
通讯作者：
Burslem, David F. R. P.
中科院分区：
文献类型：
--
作者：
Dent, Daisy H.;Burslem, David F. R. P.
背景：在热带森林中，景观尺度上的树种组成往往与底层土壤类型密切相关。土壤类型的变化可能会对森林结构产生影响，从而导致光照和土壤资源可用性的变化，因为在较肥沃的地点，林下植物的光照可用性往往较低。植物功能性状可以决定物种在光照和土壤资源可用性梯度上的分布。目的：测试具有对比分布的树种是否表现出反映其对原生环境中最有限资源的适应的叶性状。方法：我们测量了叶片养分浓度，气孔密度，叶片δ C-13值，单位面积的叶质量，和叶寿命的树苗9个常见的dipterocarp物种在Sepilok森林保护区，马来西亚婆罗洲，拥有不同的协会，土壤资源histories.Results：物种专门在其成人分布到营养贫乏的砂岩土壤的性状指示的营养保护策略。专门更肥沃的冲积土壤的物种有更广泛的叶N和P浓度和LL，反映了更大的差异，在此habitation.Conclusions的物种之间的资源获取和使用的策略：下层光制度共变与土壤类型，光和土壤资源的可用性影响叶性状的适应，可能有助于物种栖息地协会。
Background: Tree species composition at the landscape scale is often tightly associated with underlying soil type in tropical forests. Changes in soil type may have effects on forest structure that drive changes in both light and soil resource availability, since light availability in the understorey tends to be lower in more fertile sites. Plant functional traits may determine species distributions across gradients of light and soil resource availability.Aims: To test whether tree species with contrasting distributions exhibit leaf traits that reflect adaptation to the resources most limiting in their native environment.Methods: We measured foliar nutrient concentrations, stomatal density, leaf delta C-13 values, leaf mass per area, and leaf lifespan for saplings of nine common dipterocarp species at Sepilok Forest Reserve, Malaysian Borneo, possessing varying associations to soil resource habitats.Results: Species specialised in their adult distribution to nutrient-poor sandstone soils had traits indicative of a nutrient conservation strategy. Species specialised to more fertile alluvial soils had a wider spectrum of leaf N and P concentrations and LL, reflecting greater variance in strategies for resource acquisition and use among species in this habitat.Conclusions: Understorey light regimes co-vary with soil type, and both light and soil resource availability influence leaf trait adaptations that may contribute to species-habitat associations.