| 摘要: |
| 为了揭示红树林人工幼林与天然成熟林叶经济谱的区别及关联，加深红对树林人工幼林与天然成熟林对环境适应机制的理解。本研究以人工造林满一年的红树林人工幼林[木榄(Bruguiera gymnorrhiza)、桐花树(Aegiceras corniculatum)、秋茄(Kandelia obovata)和白骨壤(Avicennia marina)]和天然成熟林桐花树和秋茄为研究对象，通过对人工幼林和天成成熟林叶功能性状(叶干物质含量、比叶面积、叶组织密度、叶厚度、叶面积和叶体积)的测定，分析人工幼林和天然成熟林不同功能性状差异和关联情况。结果表明：(1)除叶体积外，其余叶功能性状在天然成熟林和人工幼林间均存在显著差异(P<0.05)。其中，叶干物质含量、比叶面积、叶组织密度和叶面积为天然成熟林显著大于人工幼林，而叶厚度则相反。(2)在天然林中，比叶面积与叶干物质含量、叶组织密度与比叶面积和叶面积呈显著负相关，而叶组织密度与叶干物质含量、叶体积与叶厚度和叶面积呈显著正相关；在人工幼林中仅有叶体积与叶厚度和叶面积呈显著正相关，其他叶功能性状之间相关性不显著。(3)成熟天然林主要侧重对叶干物质含量、叶组织密度和比叶面积的投资，而人工幼林则对所有性状进行投资。该研究结果有助于理解红树林人工幼林与天然成熟林对生态适应过程、生长策略和资源分配的差异，为我国东南沿海红树林修复与造林工作提供科学依据。 |
| 关键词: 红树林 人工幼林 成熟天然林 叶功能性状 主成分分析 |
| DOI： |
| 投稿时间：2024-03-02修订日期：2024-04-25 |
| 基金项目: |
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| Differences and connections of leaf economic spectrum between mangrove sapling plantation and natural mature forest* |
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panyuanfang, qiuguanglong, suzhinan, qiusiting, panlianghao, fanhangqing
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| (Guangxi Academy of Marine Sciences (Guangxi Mangrove Research Center)) |
| Abstract: |
| To reveal the difference and correlation of leaf economic spectrum between mangrove sapling plantation and natural mature forest, and deepen the understanding of environmental adaptation mechanism. The research object is mangrove sapling plantation and natural mature forest which have been afforested for one year. Among them, sapling plantation include Bruguiera gymnorrhiza, Aegiceras corniculatum, Kandelia obovata and Avicennia marina, while natural mature forests mainly include Aegiceras corniculatum and Kandelia obovata. Tthe leaf dry matter content(LDMC), specific leaf area(SLA), leaf tissue density(LD), leaf thickness(LT), leaf area(LA) and leaf volume(LV) of sapling plantation and mature natural forest were measured, and analyzed the differences and correlations of these leaf functional traits between sapling plantation and mature natural forest. The results indicate that (1) except LV, there were significant differences in other leaf functional traits between natural mature forest and sapling plantation (p<0.05). Among them, leaf dry matter content(LDMC), specific leaf area(SLA), leaf tissue density(LD) and leaf area(LA) in natural mature forest were significantly greater than those in sapling plantation, while leaf thickness(LT) in sapling plantation was significantly greater than that in natural mature forest. (2) In the natural forest, specific leaf area(SLA) and leaf dry matter content(LDMC), leaf tissue density(LD) and specific leaf area(SLA), leaf tissue density(LD) and leaf area(LA) were significantly negatively correlated, while leaf tissue density(LD) and leaf dry matter content(LDMC), leaf volume(LV) and leaf thickness(LT), leaf volume(LV) and leaf area(LA) were significantly positively correlated; In the sapling plantation, only leaf volume(LV) was significantly positively correlated with leaf thickness(LT) and leaf area(LA). The results of principal component analysis showed that the natural mature forest mainly focused on the investment of leaf dry matter content(LDMC), leaf tissue density(LD) and specific leaf area(SLA), while the sapling plantation invested in all traits. The results are helpful to understand the differences of ecological adaptation process, growth strategy and resource allocation between mangrove sapling plantation and natural mature forest, and provide a scientific basis for mangrove restoration and afforestation in the southeast coast of China. |
| Key words: Mangrove sapling plantation natural mature forest leaf functional traits principal component analysis |
