叶片性状受土壤因子的影响,在森林中表现出品种差异。然而,关于岛上生态系统的报道很少。我们综合调查了9个叶片性状(叶片长度,叶片宽度,叶面积,SLA,叶片鲜重,叶C含量,叶片N含量,叶片K含量,54种主要亚热带木本植物的叶片C:N比)和土壤参数(土壤pH,总C含量,总N含量,总K含量,可用的N含量,可用P含量,可用钾含量和土壤水分)在内林丁岛,深圳,中国南方。测量了叶片性状的种内和种间变异,并探讨了它们与土壤参数的相关性。叶片C:N比的种间变异,叶片N含量和叶片鲜重高于其种内变异。叶片K含量的种内变异大于种间变异,占总方差的80.69%。在叶片形态性状变异的种内系数之间发现正相关。种内性状变异与土壤参数变异的相关性分析表明,土壤因子的变化影响了叶片形态和化学计量。土壤水分与土壤有效磷含量的交互作用是影响叶面积等叶片性状种内变异的关键因素,叶片鲜重,叶C和叶K含量。我们得出结论,岛上植物的叶片性状与土壤参数密切相关。土壤参数,特别是土壤水分和有效磷含量,在局部尺度上影响植物叶片形态和化学计量。
Leaf traits were affected by soil factors and displayed varietal differences in forest. However, few examples have been reported on the Island ecosystems. We comprehensively investigated 9 leaf traits (leaf length, leaf width, leaf area, SLA, leaf fresh weight, leaf C content, leaf N content, leaf K content, leaf C:N ratio) of 54 main subtropical woody species and soil parameters (soil pH, total C content, total N content, total K content, available N content, available P content, available K content and soil moisture) in Neilingding Island, Shenzhen, southern
China. Intra-and interspecific variation of leaf traits were measured and their correlations with soil parameters were explored. The interspecific variations of leaf C:N ratio, leaf N content and leaf fresh weight were higher than their intraspecific variations. The intraspecific variation of leaf K content was larger than that of interspecific one, accounting for 80.69% of the total variance. Positive correlations were found among intraspecific coefficients of variations in leaf morphological traits. The correlation analysis between the variation of intraspecific traits and the variation of soil parameters showed that changes in soil factors affected leaf morphology and stoichiometry. The interaction between soil moisture and soil available P content was the key factor on intraspecific variations of leaf traits including leaf area, leaf fresh weight, leaf C and leaf K content. We concluded that leaf traits of plants in the island were tightly related to soil parameters. Soil parameters, especially soil moisture and available P content, affected plant leaf morphology and stoichiometry at the local scale.