阅读说明：本技术 一种确定极小种群野生植物保护小区数量、位置和面积的方法 (Method for determining number, position and area of wild plant protection cells of extremely small population ) 是由 杨文忠 张珊珊 周云 陈剑 康洪梅 袁春明 罗婷 于 2019-11-05 设计创作，主要内容包括：本发明公开了一种确定极小种群野生植物保护小区数量、位置和面积的方法,包括三个如下步骤：S1:依据种群调查结果统计天然种群的数量及大小,确定出目的物种种群数、总株数和各种群株数的步骤；S2:确定分布于已建保护地的种群数及其株数的步骤；S3:确定极小种群野生植物保护小区数量、位置和面积的步骤。本发明解决了自然保护小区对特定目的物种针对性不强且缺乏确定保护小区数量、位置和面积技术方法的问题,为极小种群野生植物保护小区规划建设提供了明确的数量、位置和面积信息数据,能够避免地方政府和规划设计等参与方主观因素的影响。(The invention discloses a method for determining the number, position and area of wild plant protection cells in a minimal population, which comprises the following three steps: s1, counting the number and size of natural population according to the population survey result, and determining the population number of target species, the total number of plants and the number of various populations of plants; s2, determining the population number and the strain number distributed in the established protected area; and S3, determining the number, the position and the area of the wild plant protection cells in the minimal population. The method solves the problems that the natural protection cell has poor pertinence to specific target species and a technical method for determining the number, the position and the area of the protection cell is lacked, provides clear number, position and area information data for the planning and construction of the protection cell of the wild plants in the extremely small population, and can avoid the influence of subjective factors of local governments, planning and designing and other participants.)

1. A method for determining the number, the position and the area of a wild plant protection cell in a minimal population is characterized by comprising the following three steps:

s1, counting the number and size of natural population according to the population survey result, and determining the population number of target species, the total number of plants and the number of various populations of plants;

s2, determining the population number and the strain number distributed in the established protected area;

and S3, determining the number, the position and the area of the wild plant protection cells in the minimal population.

2. The method for determining the number, location and area of wild plant protection cells in a minimal population according to claim 1, wherein the method comprises the steps of: in step S1, the total population P, the total number N of plants, and the number of plants per population of the target species are determined based on the national plant resource emphasis survey data or the results obtained by conducting the species specific survey.

3. The method for determining the number, location and area of wild plant protection cells in a minimal population according to claim 1, wherein the method comprises the steps of: in step S2, each population is located and counted to determine the number of populations P 'and the number of individuals N' distributed in the established protected areas such as national parks, natural protected areas, and species protected areas.

4. The method for determining the number, location and area of wild plant protection cells in a minimal population according to claim 1, wherein the method comprises the steps of: in step S3, the total population number P, the total number of plants N, the population number P 'and the number of plants N' which are already in the protection state are compared,

(1) when P '/P > 0.5 and N'/N > 0.5 are met, no new protection cell is established;

(2) when any one of the protection cells is not satisfied, selecting the population outside the protected area from large to small according to the scale of the natural population not subjected to protection to establish the protection cell until 50% or more of the population and plants are protected, thereby determining the number of the protection cells and the position of each protection cell.

5. The method for determining the number, location and area of wild plant protection cells in a minimal population according to claim 4, wherein the method comprises the steps of: when a protection cell is established for a certain natural population, determining the area coefficient C interval of the protection cell according to the living type of a target species, wherein the number of herbaceous plants is 0.05-2, the number of shrubs or vines is 0.1-3, the number of arbor tree species is 0.3-5, and further refining the value interval of the area coefficient C according to the area A of the natural population of the planned protection cell; and in the refined interval, determining a C value according to the landform and the feature of the plant community of the proposed site, and calculating the area of the wild plant protection cell of the minimum population according to a formula S-AC.

6. The method for determining the number, location and area of wild plant protection cells in a minimal population according to claim 5, wherein the method comprises the steps of:

when the natural population area A is more than 50hm²When in use, the area of the protection cell of the wild plants in the extremely small population is fixed,

the tree species of the arbor is 30hm²，

Shrub or vine plantingThe object is 10hm²，

The herbaceous plant is 5hm²。

Technical Field

The invention relates to the technical field of wild plant protection, in particular to a method for determining the number, position and area of a protection cell of a wild plant in a very small population.

Background

The wild plants with the extremely small population are in a narrow field or are distributed discontinuously, are limited by self reasons or interfered by external factors for a long time, and are degraded or reduced continuously, and the population scale is lower than that of the minimum viable population and is endangered to be extinct. The protection of the plants in the minimum population is related to the problem of the persistence or extinction of plant species, and is an important content of the protection of wild plant resources. At present, the 'national tiny population wild plant rescue protection engineering' including 120 plants is implemented in China, and is a plant variety which needs to be urgently rescued and protected, the name list of tiny population plants is continuously increased in the next step, and tiny population plant protection becomes important content of wild plant protection.

The method establishes a protection cell for on-site protection, can protect the natural population of the minimal population plants and the natural habitat of the minimal population plants, and is the most effective method in the rescue and protection measures of the minimal population wild plants. At present, natural protection cells are similar to the wild plant protection cells of extremely small populations in the aspect of words, natural protection cells are more in extraction methods and practice, but natural protection cells are mainly set up aiming at regions with relatively good natural environment preservation, and no unified method is used for determining the number, the positions and the areas in the planning design, so that the natural protection cells are usually influenced by factors such as local governments, planning and designing ideas, capital investment and the like, for example, the natural protection cells set up in a county and a city are different from several to hundreds, the positions, the areas and the like of the natural protection cells are influenced by subjective factors, certain randomness is achieved, the approved degree after the planning is built is lower, and the later-stage management and maintenance sustainability are not strong; meanwhile, the natural protection cell is usually directed at a section with better natural environment conditions, and the connection between the natural protection cell and the biological and ecological characteristics of target species is not tight, so that the scientificity is not sufficient.

The method is an initial method for determining the number, the position and the area of the wild plant protection cells of the extremely small population in planning and construction.

Disclosure of Invention

The invention aims to provide a method for determining the number, position and area of wild plant protection cells in a very small population so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a method for determining the number, the position and the area of a wild plant protection cell of a minimal population comprises the following three steps:

counting the number and size of natural populations according to population survey results, and determining the population number of target species, the total number of plants and the number of various populations of plants;

determining the population number and the strain number distributed in the established protected area;

and determining the number, the position and the area of the wild plant protection cells of the extremely small population.

Preferably, in step S1, the total population number P, the total number N and the number of strains of each population of the target species are determined according to national plant resource emphasis survey data or results obtained by conducting a species-specific survey.

Preferably, in step S2, each population is located and counted to determine the number of populations P 'and the number of individuals N' distributed in the established protected areas such as national parks, natural protected areas, and species protected areas.

Preferably, in step S3, the total population number P, the total number of plants N, the population number P 'and the number of plants N' which are already in the protection state are compared,

(1) when P '/P > 0.5 and N'/N > 0.5 are met, no new protection cell is established;

(2) when any one of the protection cells is not satisfied, selecting the population outside the protected area from large to small according to the scale of the natural population not subjected to protection to establish the protection cell until 50% or more of the population and plants are protected, thereby determining the number of the protection cells and the position of each protection cell.

Further, when a protective cell is established for a certain natural population, the area coefficient C interval of the protective cell is determined according to the living type of a target species, the number of herbaceous plants is 0.05-2, the number of shrubs or vines is 0.1-3, the number of arbor tree species is 0.3-5, and the value interval of the area coefficient C can be further refined according to the area A of the natural population of the planned protective cell; and in the refined interval, determining a C value according to the landform and the feature of the plant community of the proposed site, and calculating the area of the wild plant protection cell of the minimum population according to a formula S-AC.

Further, when the natural population area A is more than 50hm²When in use, the area of the protection cell of the wild plants in the extremely small population is fixed,

the tree species of the arbor is 30hm²，

The content of shrub or vine is 10hm²，

The herbaceous plant is 5hm²。

The invention has the technical effects and advantages that:

(1) the technical method provides clear quantity, position and area information for planning and construction of the wild plant protection cell of the minimum population, can avoid the influence of subjective factors of local governments, planning and design and other participants, and is a reliable technical method for planning and construction of the wild plant protection cell of the minimum population.

(2) The technical method is a method for developing effective protection of natural populations of the wild plants based on biological and ecological characteristics of the wild plants of the minimum populations, embodies the scientificity and pertinence of planning and construction of the protection cells of the wild plants of the minimum populations, and can well achieve the purpose of construction of the protection cells of the wild plants of the minimum populations.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the attached table 1, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The number, position and area of wild plant protection cells of a very small population are determined mainly on the basis of biological and ecological characteristics of target species. The method specifically comprises the following steps:

(1) determining the number of planned and constructed protection cells and the positions of the protection cells according to the population number, the population size and the current protected state of a target species;

(2) determining a protected cell area coefficient according to the living type of the target species;

(3) and determining the area of the protected cell by combining the natural population area of the proposed protected cell and the further refined area coefficient of the protected cell.

The embodiment provides a method for determining the number, the position and the area of a wild plant protection cell in a minimal population, which comprises the following three steps:

counting the number and size of natural populations according to population survey results, and determining the population number of target species, the total number of plants and the number of various populations of plants;

determining the population number and the strain number distributed in the established protected area;

and determining the number, the position and the area of the wild plant protection cells of the extremely small population.

In particular, the first and second (c) substrates,

in step S1, the total population P, the total number N of plants, and the number of plants per population of the target species are determined based on the national plant resource emphasis survey data or the results obtained by conducting the species specific survey.

In step S2, each population is located and counted to determine the number of populations P 'and the number of individuals N' distributed in the established protected areas such as national parks, natural protected areas, and species protected areas.

In step S3, the total population number P, the total number of plants N, the population number P 'and the number of plants N' which are already in the protection state are compared,

after the above values are determined, a comparison is made

(1) When P '/P > 0.5 and N'/N > 0.5 are met, no new protection cell is established;

(2) when any one of the protection cells is not satisfied, selecting the population outside the protected area from large to small according to the scale of the natural population not subjected to protection to establish the protection cell until 50% or more of the population and plants are protected, thereby determining the number of the protection cells and the position of each protection cell.

For example, P-9, N-450 for a very small population of wild plants; when P 'is 3 and N' is 162, the protected population number and the individual number are not more than 50%. At the moment, 6 populations which are not built with the protected area need to be sequenced from more to less according to the number of the plants, and 2 populations with the largest number of individuals need to be selected to plan and build a protected cell from the view of the number of the populations, so that the condition that P'/P is more than 0.5 can be met; however, if the sum of the numbers of individuals of the 2 selected populations plus 162 (the number of protected individuals N ') still does not exceed 225 (N x 0.5), then No. 3 population is selected from the sorted populations to plan the construction of the protected cell, and so on, until the conditions of P '/P > 0.5 and N '/N > 0.5 are met simultaneously. Since the result of the population survey contains the position information of the population, once the population is selected according to the method, the position of the protection cell to be planned and constructed is determined. Assuming that the condition is satisfied when the No. 3 population is selected in this example, the number of the protection cells to be planned and constructed is 3, and the positions of the protection cells are the positions of the selected No. 1, 2, and 3 populations.

Preferably, when a protection cell is established for a natural population, the area coefficient C of the protection cell is determined according to the life type of the target species (see Table 1),

specifically, the amount of herbaceous plants is 0.05 to 2, the amount of shrubs or vines is 0.1 to 3, the amount of arbor species is 0.3 to 5,

according to the area A of the natural population of the planned protection cell, the value interval of the area coefficient C can be further refined; and in the refined interval, determining a C value according to the landform and the feature of the plant community of the proposed site, and calculating the area of the wild plant protection cell of the minimum population according to a formula S-AC.

Preferably, the natural population area A > 50hm²When in use, the area of the protection cell of the wild plants in the extremely small population is fixed,

the tree species of the arbor is 30hm²，

The content of shrub or vine is 10hm²，

The herbaceous plant is 5hm²。

TABLE 1 calculation table for area of protection plot of wild plants in minimal population

The embodiments of the invention have been described in detail with reference to the accompanying tables, but the invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the spirit and scope of the invention.