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Spacing measuring method for tree species diversity

A technology of diversity and tree species, applied in measurement devices, special data processing applications, instruments, etc., can solve the problem that it is difficult to reflect rare species, cannot correctly express the order of the degree of spatial isolation of tree species, and the scope of application of the index is different, etc. question

Inactive Publication Date: 2008-08-20
INST OF FORESTRY CHINESE ACAD OF FORESTRY
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Problems solved by technology

[0004] The above-mentioned biodiversity measurement indicators are all affected by the size of the sample plot. Different indexes have different scopes of application. At the same time, it is difficult to reflect the influence of rare species, and cannot correctly express the degree of spatial isolation of tree species in communities with the same number of tree species. order

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  • Spacing measuring method for tree species diversity
  • Spacing measuring method for tree species diversity
  • Spacing measuring method for tree species diversity

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specific Embodiment 1

[0037] As shown in Figure 1, three sets of simulated data are designed. Groups i and ii are the scenarios where two tree species equally divide the space, and group iii is the scenario where three tree species equally divide the space. The only difference between group i and group ii is the number of plants, group i is 64 plants, group ii is 108 plants; the total calculated number of plants in group ii and group iii is 108 plants. Each group is divided into four situations: a, b, c, and d, among which, a means single-plant mixed cross, b means double-plant mixed cross, c means single-row mixed cross, and d means double-row mixed cross. Obviously, the diversity of group i and group ii should be the same; the diversity of group iii is higher than that of group i and group ii; the same number of tree species, the degree of spatial isolation of tree species is in the order of a>b>c>d, generally speaking, The higher the degree of spatial isolation of tree species, the greater the d...

specific Embodiment 2

[0042] Using the comprehensive survey data of 3 large plots (1 plot is from Hainan tropical rainforest 3000m 2 The sample plot belongs to the original forest; one plot comes from the temperate Korean pine broad-leaved forest in Jilin with an area of ​​10,000m 2 The sample plot belongs to selective logging forest; one piece is from the transition zone broad-leaved forest in the southern edge of the temperate zone and the northern subtropical zone in Xiaolong Mountain, Gansu Province, 3600m 2 ) and the sample survey data of 9 plots without samples (all from Xiaolong Mountain, Gansu Province. Among them, 1 piece of natural forest that has undergone selective felling twice, and 1 piece of natural forest that has been closed for nearly 40 years after clearcutting Secondary forests and 7 different types of plantation forests that recovered naturally in 2009), and compared 6 kinds of diversity measurement indexes.

[0043] As shown in Table 2, the calculation results of six diversit...

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Abstract

The invention discloses a space measure method of tree species diversity, which is to select a plurality of reference trees in a plurality of tree species of the community investigated standing forest stochastically and 4 recent neighboring wood to be the structural unit, to calculate the mingling degree of a structural unit, to cause the ratio of the tree species number to the total plants in the structural unit multiplying with the mingling degree, wherein, the obtained value is the of the structural unit; to calculate the average value of the tree species space states of the structural unit formed by a plurality of reference trees of each tree species to be the average space state of the tree species; to cause the set of the average spatial states of a plurality of tree species to be the tree species diversity index of the community investigated; to carry on the description of the tree species diversity of the community investigated through the index, which is not influenced by the sampling ground size, simultaneously, can reflect the influence of the strange species, and can express correctly the order of the tree species spatial separation degrees of the communities with the same tree species number.

Description

technical field [0001] The invention relates to a method for measuring community diversity, in particular to a method for spatially measuring community tree species diversity. Background technique [0002] Biodiversity research is a very important field in global ecosystem research, and how to protect biodiversity is a hot issue that needs to be resolved urgently in life sciences today. The first premise of biodiversity research is the measurement and evaluation of community diversity, and the calculation of species diversity is an important tool for quantitatively evaluating the status of biodiversity and providing a theoretical basis for its conservation practices. [0003] In the prior art, biodiversity refers to the synthesis of organisms and their ecological complexes formed with the environment and various ecological processes related to it. Diversity index is a single statistic that combines species richness and evenness. No matter the information measure, probabilit...

Claims

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Application Information

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IPC IPC(8): G06F19/00G01B21/00
Inventor 惠刚盈赵中华
Owner INST OF FORESTRY CHINESE ACAD OF FORESTRY
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