| 基于物种空间结构和多样性的改进型混交度研究 |
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| 引用本文： | 张结存,徐丽华,张茂震,汤孟平.基于物种空间结构和多样性的改进型混交度研究[J].浙江农林大学学报,2014,31(3):336-342. |
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| 作者姓名： | 张结存 徐丽华 张茂震 汤孟平 |
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| 作者单位： | 1. 浙江农林大学 浙江省森林生态系统碳循环与固碳减排重点实验室，浙江 临安 311300； 2. 浙江农林大学 环境与资源学院， 浙江 临安 311300 |
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| 基金项目： | 国家自然科学基金资助项目(41201563);浙江省自然科学基金资助项目(LY12D01003) |
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| 摘 要： | 混交度是描述混交林中不同树种之间隔离程度的重要空间结构指数。由于忽略对象木周围邻近木的空间分布,传统混交度、树种多样性混交度和树种分隔程度空间测度指数在计算混交度时,使得一些不同混交程度混交林具有相同混交度;全混交度对只有几株对象木的结构单元,不能够体现出完全混交的状态。这些给混交林的混交度调查和不同混交林之间的混交度比较带来困难。鉴于此,依据物种空间结构特征和树种多样性,考虑结构单元中树种类型及分布差异,提出一种更具普遍意义的改进型混交度。通过不同的理论典型混交林和天目山不同混交程度的样地数据对不同混交度指数进行对比分析。结果得到:①对于混交程度不同的混交林,改进型混交度计算结果不同;②对于混交程度不是很强烈的混交林,改进型混交度描述更加准确。所以,该混交度是一个很好区分混交林的空间结构指数。
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| 关 键 词： | 森林测计学 树种多样性 物种空间结构 混交度 改进型混交度 |
| 收稿时间： | 2013-07-04; |
Spatial structure and species diversity with an improved mingling index |
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| ZHANG Jiecun,XU Lihua,ZHANG Maozhen,TANG Mengping.Spatial structure and species diversity with an improved mingling index[J].Journal of Zhejiang A&F University,2014,31(3):336-342. |
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| Authors: | ZHANG Jiecun XU Lihua ZHANG Maozhen TANG Mengping |
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| Institution: | 1. Zhejiang Provincial Key Laboratory of Carbon Cycling in Forest Ecosystems and Carbon Sequestration， Zhejiang A & F University，Lin’an 311300，Zhejiang, China；2. School of Environment and Resoure Sciences，Zhejiang A & F University，Lin’an 311300，Zhejiang，China |
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| Abstract: | Mingling is an important spatial structure to describe the degree of segregation in mixed forests. Due to ignore the spatial distribution of trees around the object tree，traditional mingling, species diversity mingling and the tree species segregation index may have an equal mingling in mixed forests with different mixed degree. Complete mingling has not accurately described a fully mixed forest when there are few adjacent trees in a unit. Thus，mingling research for an entire mixed forest as well as a mingling index for comparison of different mixed forests was problematic. To surmount these obstacles，an improved mingling index was proposed based on two factors: 1）species spatial structure characteristics together with species diversity，and 2）the influence of tree species types and distribution differences within a unit. Comparative analyses of different mingling indices were carried out based on typical mixed forests in theory and different mixed degree’s field data in Mount Tianmu. The results show: 1）the improving mingling has different mingling for the mixed degree of different forest；and 2）it can describe forest mingling of mixed forests which have low mixed degree more accurately. So it is an available mixed forests spatial structure index.［Ch，4 fig. 3 tab. 9 ref.］ |
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| Keywords: | forest mensuration species diversity species space structure mingling improved mingling |
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