环境因子对霞浦浮鹰岛杜虹花叶功能性状特征的影响  

The Impact of Eevironmental Factors on the Leaf Functional Trait Characheristics of Callicarpa pedunculata on Fuying Island,Xiapu

作　　者：黄运腾 杨铭 曹晟烜 罗真 朱琦琦 邓传远[3] Huang Yunteng;Yang Ming;Cao Shengxuan;Luo Zhen;Zhu Qiqi;Deng Chuanyuan(Fujian Agriculture and Forestry University,Fuzhou 350002,P.R.China;Wuxue City Landscaping Development Center;Fujian Agriculture and Forestry University)

机构地区：[1]福建农林大学,福州350002 [2]武穴市园林绿化事业发展中心 [3]福建农林大学

出　　处：《东北林业大学学报》2024年第10期59-65,共7页Journal of Northeast Forestry University

基　　金：撂荒沙地适生物种引种研究与应用示范技术(115/KH230123A)。

摘　　要：以霞浦浮鹰岛人工林林下灌木层优势种杜虹花(Callicarpa pedunculata)为研究对象,采用变异系数法、冗余分析和多元逐步回归分析杜虹花10项叶功能性状和14项环境因子的相关性。探究环境因子对其叶功能性状特征的影响及其内在关联,分析其成为海岛灌木优势种的成因。结果发现:(1)浮鹰岛人工林下土壤因子变异系数较高,土壤全磷、有效磷与速效钾质量分数的变异系数均大于50%,海岛生境异质性较强;(2)杜虹花叶功能性状变异系数介于2.0%~41.8%,以相对水分亏缺变异程度最大,叶碳质量分数最小,杜虹花对海岛异质环境具有一定适应性;(3)冗余分析表明,杜虹花叶功能性状主要受土壤有效磷、全氮影响(P<0.05);(4)多元逐步回归分析表明,杜虹花叶片的结构功能性状(叶体积、叶组织密度)主要受地形因子(海拔、坡位和坡向)影响(P<0.05),叶片化学功能性状(叶碳质量分数、叶氮质量分数、叶磷质量分数)主要受土壤因子有效磷,碱解氮和全磷影响(P<0.01)。浮鹰岛地形复杂,群落郁闭度较高,不同生境条件下,杜虹花通过叶功能性状的组合和变异以适应海岛恶劣环境。This study focuses on Callicarpa pedunculata,a dominant species in the understory shrub layer of plantations on Fuying Island,Xiapu.The coefficient of variation method,redundancy analysis,and multivariate stepwise regression analysis were employed to investigate the correlations between 10 leaf functional traits of C.pedunculata and 14 environmental factors.The research explores the influences of environmental factors on leaf functional traits,their inherent correlations,and analyzes the factors contributing to C.pedunculata becoming the dominant shrub species on the island.The results showed that:(1)High variation coefficient in soil factors under the plantations on Fuying Island,with coefficients of variation for soil total phosphorus,available phosphorus,and available potassium mass fraction all exceeding 50%,indicating strong habitat heterogeneity on the island.(2)Leaf functional trait coefficients of variation for C.pedunculata ranged from 2.0%to 41.8%,with relative water deficit variability being the highest and leaf carbon mass fraction the lowest,C.pedunculata’s adaptation to heterogeneous island environments.(3)Redundancy analysis indicated that C.pedunculata leaf functional traits were primarily influenced by soil available phosphorus and total nitrogen(P<0.05).(4)Multivariate stepwise regression analysis revealed that leaf structural functional traits(leaf volume,leaf tissue density)were mainly influenced by topographic factors such as altitude,slope position,and aspect(P<0.05),while leaf chemical functional traits(leaf carbon mass fraction,leaf nitrogen mass fraction,leaf phosphorus mass fraction)were primarily influenced by soil factors including available phosphorus,alkali hydrolyzable nitrogen,and total phosphorus(P<0.01).Given Fuying Island’s complex terrain and high community closure,C.pedunculata adapts to harsh island environments through a combination of leaf functional trait composition and variability across different habitat conditions.

关 键 词：浮鹰岛 杜虹花 叶功能性状 生态策略 

分 类 号：S793.9[农业科学—林木遗传育种]