基于树木年轮定量重建过去50年贵州典型森林优势树种的地上生物量与生产力变化
Reconstruction of above-ground biomass and net primary productivity of dominant tree species in Guizhou forests over past five decades based on treering data
查看参考文献49篇
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文摘
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利用树木年轮宽度结合树木生物量方程,重建了贵州3个地区典型森林(2个常绿与落叶阔叶混交林和1个典型常绿阔叶林) 6个优势树种(天龙山:化香树Platycarya strobilacea、安顺润楠Machilus cavaleriei;茂兰:化香树、马尾松Pinus massoniana;雷公山:华山松Pinus armandii、白梓树Pterostyrax psilophyllus)以树木个体为单元的地上生物量(AGB)与地上净初级生产力(ANPP);比较了喀斯特与非喀斯特地区树木AGB与ANPP的差异;并研究了近50年气候变化对ANPP的影响。结果显示,针叶树的平均年轮宽度大于阔叶树,喀斯特地区针叶树和阔叶树的平均树木年轮宽度,分别小于非喀斯特地区针叶树和阔叶树的平均树木年轮宽度。喀斯特地区树木的AGB及其变异幅度均小于非喀斯特地区树木。近50年来,喀斯特地区阔叶树与针叶树的ANPP平均分别为(2.4±1.2) kg a~(-1)株~(-1)和(4.6±4.1) kg a~(-1)株~(-1),显著低于非喀斯特地区阔叶树与针叶树的(5.6±4.8) kg a~(-1)株~(-1)和(12.4±7.7) kg a~(-1)株~(-1)。喀斯特地区树木ANPP的增长趋势与年均温的相关性高于生长季降水,非喀斯特地区树木ANPP与年均温和生长季降水均显著相关,且不管是在喀斯特还是在非喀斯特地区,针叶树ANPP对气候指标的变化比阔叶树更敏感。 |
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其他语种文摘
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Tree-ring widths and allometric functions were used to reconstruct above-ground biomass (AGB) and net primary productivity (ANPP) of six dominant tree species (Tianlongshan Mt.: Platycarya strobilacea,Machilus cavaleriei; Maolan: Platycarya strobilacea,Pinus massoniana; Leigongshan Mt.: Pinus armandii,Pterostyrax psilophyllus) in three typical forests of Guizhou Province (karst evergreen and deciduous broadleaved mixed forests in two sites and another site of typical evergreen broadleaved forest). Similarity and dissimilarity of AGB and ANPP of different tree species,as well as the effects of climate change in the past five decades on ANPP were compared between karst and non-karst regions. The results showed that coniferous trees presented wider mean tree-ring widths than broadleaved trees. The mean ring-widths of coniferous trees and broadleaved trees in karst regions were narrower than those in non-karst region. The trees in karst regions indicated higher AGB and larger variation ranges than those in non-karst region. The ANPP of broadleaved trees and coniferous trees in karst regions were 2.4 ± 1.2 kg a~(-1) individual~(-1) and 4.6 ± 4.1 kg a~(-1) individual~(-1),respectively in the past five decades, which were significantly lower than those in non-karst region (5.6 ± 4.8 kg a~(-1) individual~(-1) and 12.4 ± 7.7 kg a~(-1) individual~(-1),respectively). Tree ANPP increase in karst regions was more related to mean annual temperature than growing season precipitation,and tree ANPP increase in non-karst region showed significant relationships with both mean annual temperature and growing season precipitation. ANPP of coniferous trees was more sensitive to climate change than that of broadleaved trees in both karst and non-karst regions. |
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来源
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生态学报
,2020,40(10):3441-3451 【核心库】
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DOI
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10.5846/stxb201903250558
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关键词
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年轮宽度
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喀斯特常绿与落叶阔叶混交林
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亚热带常绿阔叶林
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地上生物量与生产力
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气候变化
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地址
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1.
浙江师范大学化学与生命科学学院, 金华, 321004
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中国科学院普定喀斯特生态系统观测研究站, 中国科学院普定喀斯特生态系统观测研究站, 安顺, 561000
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中国科学院地球化学研究所, 环境地球化学国家重点实验室, 贵阳, 550081
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荔波县林业局, 荔波, 558400
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中国科学院青藏高原研究所, 北京, 100101
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1000-0933 |
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学科
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林业 |
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基金
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国家自然科学基金面上项目
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国家重点研发计划项目
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文献收藏号
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CSCD:6730224
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