CN112308398A - Risk assessment and quantification method for ecological influence of invasive plants on diversity of plant species - Google Patents

Risk assessment and quantification method for ecological influence of invasive plants on diversity of plant species Download PDF

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CN112308398A
CN112308398A CN202011171687.7A CN202011171687A CN112308398A CN 112308398 A CN112308398 A CN 112308398A CN 202011171687 A CN202011171687 A CN 202011171687A CN 112308398 A CN112308398 A CN 112308398A
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王从彦
杜道林
黄萍
孙见凡
李健
戴志聪
李冠霖
李俊生
徐海耕
韦梅
王舒
程慧源
伍丙德
于友礼
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Jiangsu University
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Abstract

The invention relates to the relevant fields of invasive ecology, plant ecology, population ecology, community ecology, global change ecology, environmental ecology and the like, and discloses a risk assessment quantification method for the ecological influence of invasive plants on the diversity of plant species, which comprises five index systems: (I) the influence amplitude index IAI of invasive plants on the diversity of plant speciesS(ii) a (II) extent of influence of invasive plants on the diversity of plants Shannon index IAIH'(ii) a (III) the invasive plant influences the plant Simpson dominance degree by an amplitude index IAID(ii) a (IV) the extent of influence of the invasive plant on the Pielou evenness index IAI of the plantEH(ii) a (V) the influence amplitude index IAI of the invasive plant on the Margalef abundance of the plantF. The IAI is evaluated or averaged individually by the 5 indicesPTDThe method for evaluating the risk of the invasive plant on the ecological influence of the diversity of the plant species can be used for evaluating the risk of the invasive plant on the ecological influence of the diversity of the plant speciesAnd the evaluation quantification is simpler and more accurate. The method has the characteristics of convenience, rapidness, strong operability and high feasibility.

Description

Risk assessment and quantification method for ecological influence of invasive plants on diversity of plant species
Technical Field
The invention relates to the relevant fields of invasive ecology, plant ecology, population ecology, community ecology, global change ecology, environmental ecology and the like, and discloses a method for evaluating and quantifying risks of invasive plants on ecological influences of plant species diversity.
Background
At present, biological safety represented by biological invasion dominated by invasive plants has posed a serious threat to environmental health and ecological safety as well as to social sustainable development. Therefore, biosafety, represented by biological invasion dominated by invasive plants, has become one of the major environmental and ecological problems worldwide. Meanwhile, the national level also places high importance on biological safety, and brings the biological safety into the national safety system for supervision. Therefore, the risk assessment of ecological influence of invasive plants on the ecosystem has become one of the most concerned core scientific problems in the field of global environmental ecology research.
The core of the normal execution of the structure and the function of the ecosystem is the species diversity of the ecosystem. Therefore, under the background of a new era, in order to construct 'modern beautiful China with harmonious symbiosis between human and nature', the ecological impact risk assessment caused by the biosafety represented by the biological invasion dominated by the invasive plant is urgently needed, on one hand, a solid theoretical basis is laid for measuring the ecological harm degree of the invasive plant to the structure and the function of an ecological system, particularly the diversity of species and the like, and on the other hand, a solid scientific basis, a theoretical support, an effective execution basis and an effective practical guide are provided for carrying out precise administrative decision management and effective early warning prevention and control deployment aiming at the biosafety problem represented by the biological invasion. Although the existing quantification method aims at evaluating the risk of the invasive plants on the ecological influence of the diversity of plant species, the quantification method is not uniform and is relatively complicated. Therefore, a set of simpler, more accurate and feasible scientific quantitative index system is needed to be provided to evaluate and determine the risk of the invasive plant on the ecological influence of the diversity of the plant species, so as to lay a strong theoretical support and practical foundation for deeply clarifying the driving mechanism of the invasive plant successful invasion and further constructing an invasive plant ecological management and early warning prevention and control system.
Disclosure of Invention
The invention provides a risk assessment and quantification method for ecological influence of invasive plants on diversity of plant species, which comprises the following five index systems:
(I) indexes for representing risk assessment of plant species diversity ecological influence of invasive plants: the extent of Influence of the invasive plant on the diversity of plant species is an index [ infection index of important plants on specific varieties (S), IAIS]；
(II) indexes for characterizing risk assessment of invasive plants on plant Shannon diversity ecological impact: the magnitude of the effect of invasive plants on plant Shannon diversity index [ infection amplitude index of origin innovative plants on Shannon's diversity (H'), IAIH']；
(III) indexes for representing risk assessment of ecological influence of invasive plants on Simpson dominance degree: the magnitude of Influence of invasive plants on the dominance of Simpson plants [ infection amplitude index of infinite invasive plants on Simpson's dominance (D), IAID]；
(IV) characterization of invasive plants on the Pielou plants for uniformityIndexes of state impact risk assessment: the magnitude of Influence of the invasive plant on the uniformity of the plant Pielou [ fluorescence amplitude index of infinite innovative plants on Pielou's evaluation (E)H),IAIEH]；
(V) representing indexes of risk evaluation of the invasive plants on ecological influence of Margalef abundance on plants: the magnitude of Influence of the invasive plant on the abundance of Margalef plants [ infection amplitude index of infinite innovative plants on Margalef's richness (F), IAIF]。
The invention independently evaluates or calculates the average value of the 5 indexes to obtain the influence amplitude IAI of invasive plants on the diversity of plant speciesPTDA method for assessing the risk of an invasive plant ecologically affecting the diversity of plant species.
In the technical scheme of the invention, the parameters are as follows:
(I) the extent of Influence of the invasive plant on the diversity of plant species is an index [ infection index of important plants on specific varieties (S), IAIS]Calculated according to the following formula:
IAIS＝1-(Si/Sck)
in the formula, SiThe diversity of the plant species into which the invasive plant has invaded (i.e. the number of all plant species),
Sckthe variety of the plants which are not invaded by the invaded plants.
IAISA larger value indicates a greater risk of the invasive plant having an ecological impact on the diversity of the plant species.
(II) the breadth index of the effect of an invasive plant on the diversity of plants [ infection amplitude index of antibiotic innovative plants on Shannon's diversity (H'), IAIH']Calculated according to the following formula:
IAIH'＝1-(H'i/H'ck)
in the formula (II), H'iThe plant Shannon diversity, H 'to which the invasive plant has invaded'ckThe Shannon diversity of the plant which is not invaded by the invader.
IAIH'The larger the value is, the moreThe greater the risk of ecological impact of the invasive plant on the Shannon diversity of the plant.
Wherein the plant Shannon diversity is calculated according to the following formula (Shannon CE, Weaver W.1949.the chemical Theory of communication. university of Illinois Press, Urbana, Illinois, pp.1-117.):
Figure BDA0002747494220000021
wherein S is the diversity of plant species (i.e., the number of all plant species) of the survey sample.
PiTo investigate the relative abundance of plant i, P, within a samplei＝niN, wherein NiIn order to investigate the number of plants of plant i in the sample side, N is the total number of plants of all plants in the investigated sample side.
(III) the magnitude of the Effect of invasive plants on Simpson dominance index [ infection amplitude index of iterative innovative plants on Simpson's dominance (D), IAID]Calculated according to the following formula:
IAID＝1-(Di/Dck)
in the formula, DiPlant Simpson dominance for invaded plantckThe plant Simpson dominance of the non-invasive species of the invasive plant.
IAIDA larger value indicates a greater risk of the invasive plant having an ecological impact on the dominance of the plant Simpson.
Wherein the plant Simpson dominance is calculated according to the following formula (Simpson EH.1949.measurement of diversity. Nature 163: 688.):
Figure BDA0002747494220000031
wherein S is the diversity of plant species (i.e., the number of all plant species) of the survey sample. n isiIn order to investigate the number of plants of plant i in the sample side, N is the total number of plants of all plants in the investigated sample side.
(IV) the magnitude of the Influence of the invasive plant on the uniformity of the plant Pielou [ infection index of antibiotic innovative plants on Pielou's evaluation (E)H),IAIEH]Calculated according to the following formula:
IAIEH＝1-(EHi/EHck)
in the formula, EHiPielou homogeneity of plants from which the plants have invaded the species, EHckPlant Pielou uniformity for non-invasive species of invasive plants.
IAIEHA larger value indicates a greater risk of the invasive plant having an ecological impact on the Pielou homogeneity of the plant.
Wherein the plant Pielou homogeneity is calculated according to the following formula (Pielou EC.1966.the measurement of diversity in diversity types of biological classifications. journal of biological Biology 13: 131-:
Figure BDA0002747494220000032
wherein H' is the Shannon diversity of the plant of the survey sample, and S is the plant species diversity of the survey sample (i.e., the number of all plant species).
(V) the magnitude of Influence of the invasive plant on the abundance of Margalef plants [ infection amplitude index of infinite innovative plants on Margalef's richness (F), IAIF]Calculated according to the following formula:
IAIF＝1-(Fi/Fck)
in the formula, FiMargalef's plant abundance, F, for an invaded species of plantckMargalef, a plant not invaded by invasive plants.
IAIFA higher value indicates a higher risk of the invasive plant having an ecological impact on the richness of the plant Margalef.
Wherein the plant Margalef abundance index is calculated according to the following formula (Margalef R.1951. diversified de especies en las populations naturales (Vol.6, pp.59-72). Barcelona: public cities institute to de biologica Aplica.):
Figure BDA0002747494220000041
wherein S is the variety of the plant species (i.e., the number of all plant species) of the survey sample, and N is the total number of plants of all plants in the survey sample.
The invention has the beneficial effects that:
(1) the invention independently evaluates or calculates the average value of the 5 indexes to obtain the influence amplitude IAI of invasive plants on the diversity of plant speciesPTDThe method for evaluating the risk of the invasive plant on the ecological influence of the diversity of the plant species can carry out simpler and more accurate evaluation and quantification on the risk of the invasive plant on the ecological influence of the diversity of the plant species.
(2) The method has the characteristics of convenience, rapidness, strong operability and high feasibility.
Detailed Description
In order to quantitatively evaluate the risk of ecological influence of invasive plants on the diversity of plant species, 30 invasive samples (2m × 2m) and 30 non-invasive sample samples (2m × 2m) of a herbaceous invasive plant were randomly investigated in the field. The number of all plant species, the number of plants per plant and the total number of plants per plant were recorded for each sample. Then calculating the species diversity of each sample, namely: plant species diversity (i.e.number of all plant species) (S), plant Shannon diversity (H'), plant Simpson dominance (D), plant Pielou uniformity (E)H) Margalef plant abundance (F). The data are tabulated below:
TABLE 1 species diversity of unintrusive squares
Figure BDA0002747494220000042
Figure BDA0002747494220000051
TABLE 2 species diversity of low intrusion swatches
Figure BDA0002747494220000052
Figure BDA0002747494220000061
TABLE 3 species diversity of highly invasive species
Figure BDA0002747494220000062
Figure BDA0002747494220000071
Then, the average value of the species diversity of the non-invasive sample and the invasive sample is calculated in sequence. The data are tabulated below:
TABLE 4 comparison of species diversity of different invasion degree varieties of invasive plants
Figure BDA0002747494220000072
Figure BDA0002747494220000081
Then, according to a set of ecological impact risk assessment and quantification methods for the diversity of plant species by the invasive plant, respectively calculating an impact amplitude index (S) of the invasive plant on the diversity of plant species, IAIS]And the magnitude index of the effect of the invasive plant on the Shannon diversity of the plant [ infection amplitude index of origin innovative plants on Shannon's diversity (H'), IAIH']And the dominance of the invasive plant to the plant SimpsonInfluence amplitude index [ influx index of Influence innovative places on Simpson's domino (D), IAID]And the Influence amplitude index of the invasive plant on the plant Pielou uniformity [ infection amplitude index of ideal invasive plants on Pielou's evaluation (E)H),IAIEH]And the magnitude index of Influence of the invasive plant on the Margalef abundance of the plant [ infection amplitude index of ideal invasive plants on Margalef's richness (F), IAIF]And the magnitude of the effect of the invasive plant on the diversity of the plant species [ infection amplitude index of infinite plants on Plant Taxon Diversity (PTD), IAIPTD]. The data are tabulated below:
TABLE 5 quantitative comparison of risk assessment of ecological impact on plant species diversity by invasive plants of different invasive degrees
IAIS IAIH' IAID IAIEH IAIF IAIPTD
Low-degree invasion sample 0.155689 0.114627 0.074621 0.011881 0.189563 0.109276
High intrusion proof cube 0.479042 0.626751 0.616617 0.378587 0.602361 0.540672
According to the result, the influence range of the low-degree invasion of the invasive plant on the diversity of the plant species reaches the level i (the ecological influence risk is general, and the identification color can adopt yellow), and the influence range of the high-degree invasion of the invasive plant on the diversity of the plant species reaches the level ii (the ecological influence risk is serious, and the identification color can adopt orange); the low degree of invasion of the invasive plant has the influence on the diversity of the plant Shannon reaching the level i (the ecological influence risk is general, the identification color can adopt yellow), and the high degree of invasion of the invasive plant has the influence on the diversity of the plant Shannon reaching the level ii (the ecological influence risk is serious, and the identification color can adopt orange); the influence range of the low-degree invasion of the invasive plant on the Simpson dominance of the plant reaches the level i (the ecological influence risk is general, and the identification color can adopt yellow), and the influence range of the high-degree invasion of the invasive plant on the Simpson dominance of the plant reaches the level ii (the ecological influence risk is serious, and the identification color can adopt orange); the influence range of the low-degree invasion of the invasive plant on the Pielou uniformity of the plant reaches the level i (the ecological influence risk is general, and the identification color can adopt yellow), and the influence range of the high-degree invasion of the invasive plant on the Pielou uniformity of the plant reaches the level ii (the ecological influence risk is serious, and the identification color can adopt orange); the influence range of the low-degree invasion of the invasive plant on the Margalef richness of the plant reaches a level i (the ecological influence risk is general, and the identification color can adopt yellow), and the influence range of the high-degree invasion of the invasive plant on the Margalef richness of the plant reaches a level ii (the ecological influence risk is serious, and the identification color can adopt orange); the low degree invasion of the invasive plant has the influence on the diversity of the plant species reaching the level i (the ecological influence risk is general, and the identification color can adopt yellow), and the high degree invasion of the invasive plant has the influence on the diversity of the plant species reaching the level ii (the ecological influence risk is serious, and the identification color can adopt orange). Therefore, the invasive plant has a general ecological influence risk when the invasive plant is slightly invasive, can be classified as a general invasive plant, and the identification color can adopt yellow. However, when the invasion degree is increased to high invasion, the ecological influence risk is serious, the plants can be classified as serious invasive plants, and the identification color can be orange.

Claims (8)

1. The risk assessment and quantification method for the ecological influence of the invasive plants on the diversity of plant species is characterized in that the risk assessment and quantification method is implemented by the aid of an impact amplitude index IAI of the invasive plants on the diversity of plant speciesSInvasive plant has an amplitude index IAI on the Shannon diversity of plantsH'The magnitude index IAI of the influence of the invasive plant on the dominance of the Simpson plantDThe influence amplitude index IAI of the invasive plants on the Pielou evenness of the plantsEHThe influence amplitude index IAI of invasive plants on the Margalef abundance of plantsF5 indexes are used for evaluating or calculating the average value of the influence amplitude IAI of invasive plants on the diversity of plant species independentlyPTDA method of evaluation.
2. The method for assessing and quantifying the risk of the invasive plant on ecologically affecting the diversity of plant species as recited in claim 1, wherein each index specifically comprises:
(I) the influence amplitude index IAI of invasive plants on the diversity of plant speciesSCalculated according to the following formula:
IAIS＝1-(Si/Sck)
in the formula, SiThe diversity of plant species into which the invasive plant has invaded, namely: number of all plant species;
Sckthe variety of plant species of the non-invasive sample of the invasive plant;
IAISa larger value indicates a greater risk of the invasive plant ecologically affecting the diversity of the plant species;
(II) extent of influence of invasive plants on the diversity of plants Shannon index IAIH'Calculated according to the following formula:
IAIH'＝1-(H'i/H'ck)
in the formula (II), H'iThe plant Shannon diversity, H 'to which the invasive plant has invaded'ckThe Shannon diversity of the plant which is not invaded by the invaded plant;
IAIH'a larger value indicates a greater risk of the invasive plant having an ecological impact on the Shannon diversity of the plant;
wherein the plant Shannon diversity is calculated according to the following formula:
Figure FDA0002747494210000011
wherein S is the plant species diversity of the survey sample, namely: number of all plant species;
Pito investigate the relative abundance of plant i, P, within a samplei＝niN, wherein NiThe number of plants of the plant i in the investigation sample prescription is obtained, and N is the total number of plants of all plants in the investigation sample prescription;
(III) the invasive plant influences the plant Simpson dominance degree by an amplitude index IAIDCalculated according to the following formula:
IAID＝1-(Di/Dck)
in the formula, DiPlant Simpson dominance for invaded plantckThe plant Simpson dominance of the non-invasive species of the invasive plant;
IAIDa larger value indicates a larger risk of the invasive plant having an ecological impact on the dominance of the plant Simpson;
wherein the plant Simpson dominance is calculated according to the following formula:
Figure FDA0002747494210000012
wherein S is the plant species diversity of the survey sample, namely: number of all plant species;
nithe number of plants of the plant i in the investigation sample prescription is obtained, and N is the total number of plants of all plants in the investigation sample prescription;
(IV) the extent of influence of the invasive plant on the Pielou evenness index IAI of the plantEHCalculated according to the following formula:
IAIEH＝1-(EHi/EHck)
in the formula, EHiPielou homogeneity of plants from which the plants have invaded the species, EHckPlant Pielou uniformity for non-invasive species of invasive plants;
IAIEHa larger value indicates a greater risk of the invasive plant having an ecological impact on the Pielou evenness of the plant;
wherein the plant Pielou uniformity is calculated according to the following formula:
Figure FDA0002747494210000021
wherein H' is the plant Shannon diversity of the survey sample, S is the plant species diversity of the survey sample, namely: number of all plant species;
(V) the influence amplitude index IAI of the invasive plant on the Margalef abundance of the plantFCalculated according to the following formula:
IAIF＝1-(Fi/Fck)
in the formula, FiMargalef's plant abundance, F, for an invaded species of plantckThe Margalef abundance of the plant which is a non-invasive sample of the invasive plant;
IAIFa larger value indicates a greater risk of the invasive plant having an ecological impact on the richness of the plant Margalef;
wherein the Margalef abundance index of the plant is calculated according to the following formula:
Figure FDA0002747494210000022
wherein S is the plant species diversity of the survey sample, namely: number of all plant species; n is the total number of plants of all plants in the survey sample.
3. The method for assessing and quantifying the risk of ecologically affecting the diversity of plant species by invasive plants according to claim 2, wherein the selected survey sample in index (I) is divided into two categories, namely: the invasive plant invades the sample side and the invasive plant does not invade the sample side;
the selection quantity of the invaded sample parties and the non-invaded sample parties of the invaded plant is at least 3, and the more the selection quantity of the sample parties is, the better the selection quantity is;
the survey sample size recommendation is set as: (1) and (3) arbor: 20m by 20 m; (2) and (3) shrub: 10m by 10 m; (3) herbaceous: 2m by 2 m; (4) moss: 0.5m by 0.5 m;
the magnitude of the impact of invasive plants on plant species diversity can be divided into three levels, namely: (i)0.00<IAIS≤0.35；(ii)0.35<IAIS≤0.75；(iii)0.75<IAISThe plant identification color is less than or equal to 1.00, and the plant species diversity influence range reaches the i level, the plant can be classified as a general invasive plant, the ecological influence risk is general, and the identification color can adopt yellow;
the plants with the variety influence range reaching the level ii can be classified as serious invasive plants, the ecological influence risk is serious, and the identification color can be orange; the plants with the diversity influence range reaching the iii level can be classified as malignant invasive plants, the ecological influence risk is very serious, and the identification color can adopt red.
4. The method for assessing and quantifying the risk of ecologically affecting the diversity of plant species by invasive plants according to claim 2, wherein the selected survey sample In Index (II) is divided into two categories, namely: the invasive plant invades the sample side and the invasive plant does not invade the sample side;
the selection quantity of the invaded sample parties and the non-invaded sample parties of the invaded plant is at least 3, and the more the selection quantity of the sample parties is, the better the selection quantity is;
the survey sample size recommendation is set as: (1) and (3) arbor: 20m by 20 m; (2) and (3) shrub: 10m by 10 m; (3) herbaceous: 2m by 2 m; (4) moss: 0.5m by 0.5 m;
the magnitude of the impact of invasive plants on the Shannon diversity of plants can be divided into three levels, namely: (i)0.00<IAIH'≤0.35；(ii)0.35<IAIH'≤0.75；(iii)0.75<IAIH'The identification color can be yellow, and the identification color can be classified into a general invasive plant with the influence range of the Shannon diversity of the plant reaching the i level, the ecological influence risk is general; the plant which has the influence range of Shannon diversity reaching the level ii can be classified as a serious invasive plant, the ecological influence risk is serious, and the identification color can be orange; the plants with the Shannon diversity influence amplitude reaching the iii level can be classified as malignant invasive plants, the ecological influence risk is very serious, and the identification color can adopt red.
5. The method for assessing and quantifying the risk of ecologically affecting the diversity of plant species by invasive plants according to claim 2, wherein the selected survey sample in index (III) is divided into two categories, namely: the invasive plant invades the sample side and the invasive plant does not invade the sample side;
the selection quantity of the invaded sample parties and the non-invaded sample parties of the invaded plant is at least 3, and the more the selection quantity of the sample parties is, the better the selection quantity is;
the survey sample size recommendation is set as: (1) and (3) arbor: 20m by 20 m; (2) and (3) shrub: 10m by 10 m; (3) herbaceous: 2m by 2 m; (4) moss: 0.5m by 0.5 m;
the influence of the invasive plant on the Simpson dominance of the plant can be divided into three levels, namely: (i)0.00<IAID≤0.35；(ii)0.35<IAID≤0.75；(iii)0.75<IAIDThe influence range on the dominance of the plant Simpson is less than or equal to 1.00, the plant Simpson can be classified as a general invasive plant, the ecological influence risk is general, and the identification color can be yellow; to pairThe plants with the influence range of Simpson dominance reaching the level ii can be classified as serious invasive plants, the ecological influence risk is serious, and the identification color can be orange; the plants with the influence range of Simpson dominance reaching the iii level can be classified as malignant invasive plants, the ecological influence risk is very serious, and the identification color can be red.
6.The method for assessing and quantifying the risk of ecologically affecting the diversity of plant species by invasive plants according to claim 2, wherein the selected survey sample in Index (IV) is divided into two categories, namely: the invasive plant invades the sample side and the invasive plant does not invade the sample side;
the selection quantity of the invaded sample parties and the non-invaded sample parties of the invaded plant is at least 3, and the more the selection quantity of the sample parties is, the better the selection quantity is;
the survey sample size recommendation is set as: (1) and (3) arbor: 20m by 20 m; (2) and (3) shrub: 10m by 10 m; (3) herbaceous: 2m by 2 m; (4) moss: 0.5m by 0.5 m;
the influence of the invasive plants on the Pielou uniformity of the plants can be divided into three levels, namely: (i)0.00<IAIEH≤0.35；(ii)0.35<IAIEH≤0.75；(iii)0.75<IAIEHThe plant Pielou uniformity is less than or equal to 1.00, and the plant Pielou uniformity reaches the level i, the plant can be classified as a general invasive plant, the ecological influence risk is general, and the identification color can be yellow; the plants with the Pielou uniformity influence amplitude reaching the level ii can be classified as serious invasive plants, the ecological influence risk is serious, and the identification color can be orange; plants with Pielou uniformity affecting the magnitude of iii level can be classified as malignant invasive plants, the ecological impact risk is very serious, and the identification color can be red.
7. The method for assessing and quantifying the risk of ecologically affecting the diversity of plant species by invasive plants according to claim 2, wherein the selected survey sample in the index (V) is divided into two categories, namely: the invasive plant invades the sample side and the invasive plant does not invade the sample side;
the selection quantity of the invaded sample parties and the non-invaded sample parties of the invaded plant is at least 3, and the more the selection quantity of the sample parties is, the better the selection quantity is;
the survey sample size recommendation is set as: (1) and (3) arbor: 20m by 20 m; (2) and (3) shrub: 10m by 10 m; (3) herbaceous: 2m by 2 m; (4) moss: 0.5m by 0.5 m;
the influence range of the invasive plants on the Margalef richness of the plants can be divided into three levels, namely: (i)0.00<IAIF≤0.35；(ii)0.35<IAIF≤0.75；(iii)0.75<IAIFThe mark color can be yellow, and the mark color can be general invasive plants with the influence range reaching the i level on the Margalef abundance of the plants, the ecological influence risk is general; the plant Margalef with the influence range reaching the level ii can be classified as a serious invasive plant, the ecological influence risk is serious, and the identification color can be orange; the plants with the Margalef richness influence reaching the iii level can be classified as malignant invasive plants, the ecological influence risk is very serious, and the identification color can be red.
8. The method for assessing and quantifying the risk of ecologically affecting the diversity of plant species by an invasive plant according to claim 1, wherein the magnitude of the impact IAI of the invasive plant on the diversity of plant speciesPTDCalculated according to the following formula:
Figure FDA0002747494210000041
the magnitude of the impact of invasive plants on the diversity of plant species can be divided into three levels, namely: (i)0.00<IAIPTD≤0.35；(ii)0.35<IAIPTD≤0.75；(iii)0.75<IAIPTDThe identification color can be yellow, and the identification color can be classified into general invasive plants with the influence range reaching the i level on the diversity of plant species, the ecological influence risk is general; the plants with the variety influence amplitude reaching the level ii can be classified as serious invasive plants, the ecological influence risk is serious, and the identification color can be orange; the plants with the variety influence amplitude reaching the iii level can be classified as malignant invasive plants, the ecological influence risk is very serious, and the identification color can adopt red.
CN202011171687.7A 2020-10-28 2020-10-28 Risk assessment and quantification method for ecological influence of invasive plants on diversity of plant species Pending CN112308398A (en)

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CN113222222A (en) * 2021-04-23 2021-08-06 贵州民族大学 Method for measuring invasion risk of foreign species in grass sea wetland
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