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粤东89种常见植物叶功能性状变异特征

陈文1,王桔红2*,马瑞君2,齐威3,刘坤3,张丽娜4,陈学林4
  

  1. (1韩山师范学院地理与旅游管理学院, 广东潮州 521041;  2韩山师范学院生命科学与食品科技学院, 广东潮州 521041;  3兰州大学生命科学学院, 兰州 730000;  4西北师范大学生命科学学院, 兰州 730070)
  • 出版日期:2016-08-10 发布日期:2016-08-10

Variance in leaf functional traits of 89 species from the eastern Guangdong of China.

CHEN Wen1, WANG Ju-Hong2*, MA Rui-Jun2, QI Wei3, LIU Kun3, ZHANG Li-Na4, CHEN Xue-Lin4#br#   

  1. (1College of Geography and Tourism Management, Hanshan Normal University, Chaozhou 521041, Guangdong, China; 2College of Life Science and Food Technology, Hanshan Normal University, Chaozhou 521041, 〖JP〗Guangdong, China; 3College of Life Sciences, Lanzhou University, Lanzhou 730000, China; 4College of Life Sciences, Northwest Normal University, Lanzhou 730070, China).
  • Online:2016-08-10 Published:2016-08-10

摘要: 叶功能性状体现了植物为获得最大化碳收获所采取的生存适应策略。本文研究了粤东89种常见植物叶功能性状包括叶面积(LA)、比叶面积(SLA)、叶干物质含量(LDMC)、叶氮含量(LNC)的变异特征及其与科类群、生活史属性和生境的关系。89种植物的LA、SLA、LDMC、LNC平均值分别为20.59 cm2、300.149 cm2·g-1、0.2213 g·g-1、2.55%;变异幅度依次是:LA(145.06%)>SLA(97.21%)>LDMC(36.40%)>LNC(27%)。LMDC与SLA呈极显著负相关关系(P<0.001)。不同科类群间SLA、LDMC差异显著(P<0.05),禾本科植物LDMC最大(0.359 g·g-1)、SLA最小(163.749 cm2·g-1),伞形科植物LDMC最小(0.136 g·g-1)、SLA最大(1091.42 cm2·g-1);藤本和灌木LA显著大于草本植物(P<0.01);科类群能解释LA、SLA、LDMC和LNC变异的26.3%、30.2%、40.9%和13.8%,其次是植物高度和生活型;科类群、植物高度和生活型三者交互作用能解释LA、SLA、LDMC、LNC变异的82.5%、80.9%、79.4%和56.7%;植物分布区、原产地及生境对叶性状均无显著影响(P>0.05)。粤东89种植物叶性状的种间变异主要受物种系统发育史和生活史特征的影响。

关键词: 生态质量评价, 遥感, 生态质量指数, 京津冀城市群

Abstract: Leaf functional trait reflects resource capture ability and use efficiency of plants. To determine leaf functional traits of common plant species from the eastern Guangdong, and whether variation in leaf traits among species is related to phylogeny, life history attributes, and/or other environmental factors, we surveyed leaf traits of 89 species including leaf area (LA), specific leaf area (SLA), leaf dry matter content (LDMC), and leaf N content (LNC). The effects of family grouping, life form, plant height, distribution, origin and habitats on leaf traits of 89 plant species were determined using oneway ANOVAs and the least significant difference test (LSD). The effects of single variables and interaction of multiple factors on variance in leaf traits among 89 species were analyzed using general linear model (GLM). The result showed that the average values of LA, SLA, LDMC and LNC of 89 species were 20.59 cm2, 300.149 cm2·g-1, 0.2213 g·g-1 and 2.55%, and coefficients of variation were 145.06%, 97.21%, 36.40% and 27%, respectively. There was a significant negative correlation between LDMC and SLA among the 89 plant species (P<0.001). There was a significant difference in SLA and LDMC between those species from different family groupings. Gramineae species had the maximum value of LDMC (0.359 g·g-1) and minimum value of SLA (163.749 cm2·g-1), and Umbelliferae species had the minimum value of LDMC (0.136 g·g-1) and the maximum value of SLA (1091.42 cm2·g-1). The LA of shrubs and liana species was significantly greater than that of herbs (P<0.01), and LA of high plants was greater than that of short species (P<0.05). Family groupings of species had an important impact on variation of leaf traits, explaining 26.3%, 30.2%, 40.9%, and 13.8% of variation in LA, SLA, LDMC, and LNC, respectively. The interactions between family groupings, plant height, and life form explained 82.5%, 80.9%, 79.4%, and 56.7% of variation in LA, SLA, LDMC, and LNC, respectively. The distribution area, origins, and habitats of species had no or less influence on leaf traits (P>0.05). Overall, the variation of leaf traits among species may be mainly influenced by phylogeny and life history traits.

Key words: ecological quality index, Beijing-Tianjin-Hebei (BTH) urban megaregion, ecological quality assessment, remote sensing.