Urban green space homogenization evaluation method and system based on plant landscape culture coupling

Abstract

The application discloses a city green land homogenization evaluation method and system based on plant landscape culture coupling, relates to the field of city planning and landscape ecology evaluation, constructs a multi-gradient observation field, selects representative cities with climate differences, and sets standard quadrats along a "central urban area-suburb-natural area" gradient in each city to collect plant community data; a plant diversity evaluation model is constructed, and the application overcomes the limitations of the prior art which only focuses on single-dimensional plant diversity analysis or pure subjective landscape aesthetic evaluation. Through the construction of a "plant-landscape-culture" three-dimensional coupling evaluation model, the quantitative correlation of ecological indexes, visual landscape patterns and regional culture perception factors is realized for the first time, and the internal driving mechanism of city green land homogenization can be revealed in depth from the perspective of system theory.

Description

Technical Field

[0001] This invention relates to the field of urban planning and landscape ecology assessment, and in particular to a method and system for assessing the homogeneity of urban green spaces based on the coupling of plant landscape culture. Background Technology

[0002] As global urbanization deepens, urban green spaces, as a core component of urban ecosystems, play a crucial role in maintaining plant diversity, improving urban microclimates, and providing recreational spaces for residents. However, habitat fragmentation and human disturbance brought about by urbanization have led to a severe phenomenon of "plant homogenization." Plant homogenization refers to the ecological process in which, within a specific region, the reduction or disappearance of endemic species and the large-scale dispersal of widespread non-native species result in increased similarity in species composition between different cities.

[0003] While existing urban planning and landscape evaluation systems have begun to pay attention to green space plant diversity, the following technical bottlenecks still exist in practical applications:

[0004] 1) Limited Evaluation Dimensions and Lack of Multidimensional Coupling Mechanisms: Existing assessment methods often focus on single-dimensional plant diversity analysis (such as calculating only α-diversity indicators like the Shannon-Wiener index), neglecting the assessment of the similarity (β-diversity) in green space composition between cities. More importantly, existing evaluation systems fail to deeply link "plant composition" with "landscape pattern" and "cultural perception," making it impossible to explain from a systems theory perspective why the convergence of landscape design directly induces a decline in species diversity.

[0005] 2) The lack of quantifiable regional cultural symbols leads to a homogenization of cities and parks: Landscape planning has long suffered from the misconception of prioritizing visual effects over ecological functions and introducing exotic species over native plants. Due to the lack of quantitative indicators for regional cultural symbols such as tropical rainforest culture and Li and Miao ethnic elements, designers often rely on subjective aesthetics rather than scientific evidence when configuring plants, resulting in a severe lack of distinctiveness in urban landscapes and falling into the predicament of homogenization of cities and parks.

[0006] 3) Lack of scientific thresholds and strategic support for the application of native plants: Although the industry generally recognizes the importance of native plants, there is currently a lack of an automated analysis system based on the comparison between "urban green space and natural secondary forest". For the core question of "what proportion of native plants can ensure landscape distinctiveness and support regional ecosystem stability", existing technologies do not have accurate evaluation models and adaptation algorithms, resulting in low application frequency and large fluctuations in survival rate of native plants.

[0007] 4) Insufficient consideration of cross-regional climate adaptability: Taking Hainan Island as an example, there are obvious climate differences between different cities, such as humid, semi-humid, and semi-arid zones. Existing assessment methods often adopt a "one-size-fits-all" approach, lacking in-depth assessment of the adaptability of native plant resources to native habitats under subdivided climate zones. This leads to high maintenance costs in the later stages of green space construction and makes it susceptible to ecological risks from invasive alien species. Summary of the Invention

[0008] The purpose of this invention is to address the problems of existing evaluation methods that lack a single dimension and multi-dimensional coupling mechanism; lack of quantitative analysis of regional cultural symbols leading to uniformity across cities; lack of scientific thresholds and strategic support for the application of native plants; and insufficient consideration of cross-regional climate adaptability. Therefore, this invention proposes a method and system for evaluating the homogeneity of urban green spaces based on the coupling of plant landscape culture.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a homogenization assessment method for urban green spaces based on plant landscape culture coupling, comprising the following steps: Step 1: constructing a multi-gradient observation field, selecting representative cities with climatic differences, and setting up standard quadrats along the gradient of "central urban area - suburbs - natural area" in each city to collect plant community data.

[0010] Step 2: Construct a plant diversity assessment model, calculate the α diversity index of vegetation within the quadrat and the β similarity index between cities, and quantify the convergence of plant composition.

[0011] Step 3: Construct a landscape-culture coupling assessment dimension, and establish cultural feature identification indicators by quantifying the expression frequency and visual perception of regional cultural symbols in green landscapes.

[0012] Step 4: Establish a three-dimensional coupled relationship model of "plants-landscape-culture" to analyze the driving relationship between the decline in species diversity and the homogenization of landscape design;

[0013] Step 5: Based on the evaluation results, compare with the local natural secondary forest species database to automatically generate differentiated native plant configuration enhancement strategies.

[0014] As a further description of the above technical solution: the standard quadrat collection in step 1 includes: setting up a 20m×20m tree quadrat, a 5m×5m shrub quadrat, and a 1m×1m shrub quadrat.

[0015] The collected indicators cover plant information such as plant name, diameter at breast height (for trees), crown width, tree height, number of trees, and canopy coverage, as well as habitat information such as latitude, longitude, and altitude.

[0016] Furthermore, a vegetation buffer zone of at least 10m should be set at the boundary of the sample plot to eliminate interference from municipal planning.

[0017] As a further description of the above technical solution: the β similarity index calculation in step 2 includes:

[0018] Qualitative analysis was conducted using the Jaccard and Sørensen similarity indices, while quantitative analysis was conducted using the Bray-Curtis similarity index to assess the overlap in species composition among different urban green spaces.

[0019] As a further description of the above technical solution: the regional cultural symbols mentioned in step 3 include: Qiongbei arcade cultural elements, Li and Miao ethnic symbols, tropical rainforest natural landscape features, and plant culture and customs such as city flowers and trees;

[0020] By constructing "cultural perception factors," abstract elements are transformed into quantifiable landscape recognition scores.

[0021] As a further description of the above technical solution: The coupling correlation model described in step 4 uses regression analysis or structural equation model to verify whether a single landscape design pattern has a negative reinforcing effect on plant diversity, thereby identifying the "homogenization trap" area.

[0022] As a further description of the above technical solution: the specific process of step 5 includes:

[0023] The similarity of the quadrat survey data with the local natural secondary forest was compared to identify missing native key species, and suitable germplasm resources were selected according to the climate zoning of the quadrat plots.

[0024] As a further description of the above technical solution, it also includes a "ecological function and native habitat adaptability assessment" step, which is used to calculate the adaptability score of the species to be introduced in a specific urban heat island environment.

[0025] A homogenization assessment system for urban green spaces based on the coupling of plant landscape culture includes:

[0026] Data input module: used to receive plant community parameters and geographic coordinate data obtained from quadrat surveys;

[0027] Core computing engine: Built-in R language or similar algorithm module for calculating α / β diversity index and coupling correlation model;

[0028] Feature library module: Stores templates of natural secondary forest vegetation and regional cultural symbol feature parameters for different climate zones;

[0029] Visualization output module: used to generate heat maps of urban green space homogeneity and optimization strategy recommendations.

[0030] As a further description of the above technical solution: the system is also connected to an invasive species early warning database, which automatically removes invasive species with high invasion risk when generating improvement strategies, and prioritizes recommending native shrubs and native herbaceous plants with low maintenance costs.

[0031] As a further description of the above technical solution: the system realizes real-time collection and cloud synchronization of sample plot data through a mobile app, and uses GIS technology to realize dynamic mapping of the evaluation results at the city scale.

[0032] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0033] 1. This invention overcomes the limitations of existing technologies that focus only on single-dimensional plant diversity analysis (such as alpha diversity) or purely subjective landscape aesthetic evaluation. By constructing a three-dimensional coupled evaluation model of "plant-landscape-culture", it achieves for the first time a quantitative correlation between ecological indicators, visual landscape patterns and regional cultural perception factors, and can deeply reveal the intrinsic driving mechanism of urban green space homogenization from a systems theory perspective.

[0034] 2. This invention utilizes an automatic comparison algorithm between sample plots and a natural secondary forest species database to accurately identify key native species that perform exceptionally well in specific regional habitats but are absent in urban parks. This technical approach effectively addresses the problem of "plant homogenization," guiding urban green spaces from simple artificial creation to the evolution of regionally characteristic natural communities, thus contributing to the construction of a stable and healthy urban ecological security pattern.

[0035] 3. This invention establishes a landscape recognizability evaluation index by extracting and digitizing regional cultural symbols such as the arcade buildings of northern Hainan, Li and Miao ethnic elements, tropical rainforest landscapes, and local city flowers and trees. This allows landscape design to move beyond blindly relying on the designer's subjective aesthetics and instead use a data-driven approach to ensure that green space construction not only meets international aesthetic standards but also possesses a profound local cultural heritage, significantly enhancing the recognizability of urban landscapes.

[0036] 4. By introducing the "ecological function and native habitat adaptability assessment" step, this invention comprehensively considers the physiological tolerance (such as heat resistance and water use efficiency) of the species to be introduced and the intensity of the urban extreme heat island effect. This method significantly reduces the "acclimatization problem" of native plants after being introduced into the urban environment, greatly improves the survival rate of green space vegetation, and fully utilizes the ecological functions of native plants in cooling, humidifying, and mitigating the heat island effect.

[0037] 5. The evaluation system accompanying this invention automates the entire process from data acquisition to strategy generation. By prioritizing the allocation of native plants with high habitat adaptability, it significantly reduces reliance on irrigation, fertilization, and pest and disease control in later manual maintenance. Simultaneously, the real-time generated dynamic improvement strategies drastically shorten the planning cycle, providing key technical support for building "energy-saving green spaces" and achieving sustainable management of urban green spaces.

[0038] 6. This invention is deeply customized for the unique climate (humid, semi-humid, semi-arid) and cultural background of tropical island cities in Hainan. Its evaluation logic and algorithm engine can be quickly extended to other tropical or subtropical regions with similar ecological vulnerability and cultural uniqueness requirements, and has broad market prospects and social benefits. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the overall structure of the present invention. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] like Figure 1 As shown, the present invention provides a method for assessing the homogeneity of urban green spaces based on the coupling of plant landscape culture, comprising the following steps:

[0042] Step 1: Construct a multi-gradient observation field, select representative cities with climatic differences, and set up standard quadrats along the gradient of "central urban area - suburbs - natural area" in each city to collect plant community data;

[0043] Step 2: Construct a plant diversity assessment model, calculate the α diversity index of vegetation within the quadrat and the β similarity index between cities, and quantify the convergence of plant composition.

[0044] Step 3: Construct a landscape-culture coupling assessment dimension, and establish cultural feature identification indicators by quantifying the expression frequency and visual perception of regional cultural symbols in green landscapes.

[0045] Step 4: Establish a three-dimensional coupled relationship model of "plants-landscape-culture" to analyze the driving relationship between the decline in species diversity and the homogenization of landscape design;

[0046] Step 5: Based on the evaluation results, compare with the local natural secondary forest species database to automatically generate differentiated native plant configuration enhancement strategies.

[0047] The standard quadrat collection mentioned in step 1 includes: setting up a 20m×20m tree quadrat, a 5m×5m shrub quadrat, and a 1m×5m herb quadrat;

[0048] The collected indicators cover plant information such as plant name, diameter at breast height (for trees), crown width, tree height, number of trees, and canopy coverage, as well as habitat information such as latitude, longitude, and altitude.

[0049] Furthermore, a vegetation buffer zone of at least 10m should be set at the boundary of the sample plot to eliminate interference from municipal planning.

[0050] In this embodiment, the technicians first selected six representative cities based on the "Hainan Island Climate Zoning": Haikou City, Wenchang City (northern / eastern humid zone), Danzhou City, Changjiang Li Autonomous County (western arid / semi-arid zone), Wuzhishan City (central mountainous humid zone), and Sanya City (southern semi-humid zone).

[0051] Sampling point deployment: Within each city, observation sampling points are continuously deployed along the "city center - suburbs - natural areas" using a GIS system to capture the urbanization gradient effect.

[0052] Standard sample method implementation:

[0053] Tree layer: Set up a 20m×20m standard quadrat in the sample plot and record the name, crown width, diameter at breast height (diameter at 1.3m), height and canopy of each tree with a diameter at breast height (DBH) ≥ 4cm.

[0054] Shrub layer: Set up a 5m×5m subplot at the center and four corners of the tree quadrat, and record the shrub name, crown width, number of plants, average height and coverage.

[0055] Herbaceous layer: Set up one 1m×1m subplot in each shrub layer and record the name of the herbaceous plant, crown width, number of plants, and average height and coverage.

[0056] Interference control: The boundary of the sample plot must be at least 10m away from hard roads, large squares and municipal buildings, and a vegetation buffer zone must be established to ensure that the collected sample plot data can reflect the community stability of the vegetation itself and eliminate the instantaneous interference from extreme municipal artificial environments.

[0057] The calculation of the β similarity index in step 2 includes:

[0058] Qualitative analysis was conducted using the Jaccard and Sørensen similarity indices, while quantitative analysis was conducted using the Bray-Curtis similarity index to assess the overlap ratio of species composition among different urban green spaces.

[0059] The collected raw data is input into the core computing engine of this invention to perform automated calculations of the following indices: α-diversity analysis: Calculate the Shannon-Wiener index (H′) and the Pielou evenness index (J′), as follows: in (This represents the relative importance value of species i).

[0060] This indicator is used to assess the plant richness of individual park green spaces.

[0061] β-Similarity Calculation: This is the core of quantifying "homogeneity." This invention employs both qualitative and quantitative indices: the Jaccard index (J). Assess the proportion of shared species among cities.

[0062] Bray-Curtis index (BC): assesses the absolute similarity of community structure based on differences in the number of individuals.

[0063] Homogenization assessment: When the BC value between cities approaches 1 and the J value is high, the system determines that there is a serious risk of plant homogenization in the region.

[0064] The regional cultural symbols mentioned in step 3 include: Qiongbei arcade building cultural elements, Li and Miao ethnic symbols, and tropical rainforest natural landscape features;

[0065] By constructing "cultural perception factors," abstract elements are transformed into quantifiable landscape recognition scores.

[0066] The coupling correlation model described in step 4 uses regression analysis or structural equation modeling to verify whether a single landscape design pattern has a negative reinforcing effect on plant diversity, thereby identifying areas of "homogenization trap".

[0067] This invention not only counts species, but also incorporates landscape design as a technical variable into the evaluation model:

[0068] Landscape fragmentation and structural analysis: Landscape ecology software was used to calculate the shape index of green patches and the ratio of trees, shrubs and grasses.

[0069] Cultural symbol quantification: Through expert scoring and computer vision recognition technology, “regional symbol perception factors” (such as the visual occupancy ratio of arcade building elements, the degree of implantation of Li and Miao cultural totems, and the degree of simulation of tropical rainforest markers such as buttress roots / cauliflory) contained in the sample plots are extracted.

[0070] Dual-coupling model: Establishing the regression equation: Where Y represents the homogenization level, and X represents the feature values ​​of the plant, landscape, and cultural dimensions, respectively. This model is used to verify: if one blindly pursues "international" design (high X... land(Similarity), whether it significantly led to a decrease in native species diversity.

[0071] Step 5 includes the following specific steps:

[0072] The similarity of the quadrat survey data with the local natural secondary forest (native plant community) was compared to identify missing key native species, and suitable germplasm resources were screened according to the climate zoning of the quadrat (humid zone, semi-humid zone, semi-arid zone).

[0073] It also includes a "Property Function and Native Habitat Adaptability Assessment" step, used to calculate the adaptability score of the proposed species in a specific urban heat island environment. The specific process includes:

[0074] Construction of the Urban Environmental Stress Factor Matrix:

[0075] The system first obtains the "Urban Heat Island Intensity Index (UHII)" of the target area under extreme summer temperatures using remote sensing thermal infrared imagery (LST) and distributed sensors;

[0076] Physical parameter acquisition: Collect data on the type of underlying surface (proportion of hard paving), soil bulk density (compactness), atmospheric carbon dioxide concentration, and effective accumulated temperature of the proposed planting area;

[0077] Urban habitats are divided into areas of extremely high heat stress (such as roadside green spaces in CBDs), areas of moderate heat effect (such as residential parks), and ecological transition zones (such as urban fringe forests).

[0078] Establishment of a database of physiological adaptation characteristics of native plants:

[0079] The system contains a database of physiological traits of major native tree species in Hainan under extreme habitats. For each native species to be introduced, the system retrieves its key physiological parameters under simulated urban habitats.

[0080] Heat resistance indicators: including leaf heat death temperature Chlorophyll fluorescence parameters at high temperatures ;

[0081] Water use efficiency (WUE): In urban areas with a large number of impermeable surfaces, assess the ability of plants to regulate stomatal conductance under drought stress.

[0082] Functional trait parameters: Specific leaf area (SLA), leaf dry matter content (LDMC), etc., are measured to assess the growth rate and strategies of plants in resource-constrained environments;

[0083] Adaptability score ( Logical calculus of )

[0084] The system employs a weighted evaluation model to calculate the fitness score of the proposed species within a specific urban grid. The calculation formula is as follows:

[0085]

[0086] T tol (Environmental tolerance): Reflects the plant's resistance to the heat island effect, soil pollution, and air dust, and is derived from the normalization of physiological parameters measured in experiments;

[0087] E func (Ecological Function Contribution): The focus is on quantifying the ability of plants to improve the urban environment, including their potential for cooling and humidifying (measured by transpiration rate), carbon sequestration capacity, and plant diversity support capacity (the ability to provide food sources for native birds and insects).

[0088] C cost (Maintenance Costs): Assess the species' tolerance to poor soil and drought; higher scores indicate less human intervention (irrigation, fertilization, pruning) required later.

[0089] R risk (Potential risks): Assess whether the species poses a risk of allergenicity (pollen), physical damage (thorns), or root damage to the building structure.

[0090] Dynamic adaptability simulation and species screening:

[0091] Validation of urban heat island mitigation capacity: Using a three-dimensional microclimate model (such as ENVI-met), the effect of the proposed species on reducing the surrounding environmental temperature under specific configuration patterns was simulated. For example, the system analysis showed that in the central roadside of Haikou City, the suitability score of native tree species with large canopies and high transpiration rates (such as Chinese banyan) was significantly higher than that of low shrubs, because the former can effectively offset the urban heat island effect through transpiration cooling.

[0092] Native habitat restoration assessment: The system dynamically matches the proposed species with the species composition of the surrounding natural secondary forests and calculates the "habitat restoration coefficient". Only species with a fit score exceeding the threshold (e.g., 0.75) and that can enhance the regional landscape distinctiveness will be recommended to the final configuration scheme by the system.

[0093] Based on the scores, the evaluation system executes the following automated logic:

[0094] Missing species comparison: The system performs an intersection operation between urban parks (set A) and the local natural secondary forests (set B) to identify a list of native plants that perform well in the secondary forests but are missing in the parks.

[0095] Ecological function adaptation evaluation: Based on different climate zones in Hainan, the system assigns an "adaptation score" to each type of native plant. For example, in Sanya City (arid area), drought-tolerant native plants are preferentially recommended, and in Haikou City, improved varieties of coastal defense forests that are salt-tolerant and wind-resistant are recommended.

[0096] Strategy generation: The final output is a customized improvement report containing "plant list + configuration mode + cultural element integration points" to solve the problem of the imbalance between "visual beauty" and "ecological locality".

[0097] The urban green space homogenization assessment system based on the coupling of plant landscape and culture includes:

[0098] Data input module: Used to receive phytocoenological parameters and geographic coordinate data obtained from quadrat surveys;

[0099] Core calculation engine: Built-in R language or similar algorithm modules for calculating α / β diversity indices and coupling association models;

[0100] Feature library module: Stores natural secondary forest vegetation templates and regional cultural symbol feature parameters for different climate zones;

[0101] Visualization output module: Used to generate a heat map of urban green space homogenization and a proposal for optimization strategies.

[0102] The system is also connected to an early warning database for alien invasive species, which automatically eliminates alien species with high invasion risks when generating improvement strategies and preferentially recommends native shrubs and native herbs with low maintenance costs.

[0103] The system realizes the real-time collection and cloud synchronization of quadrat data through a mobile App, and uses GIS (Geographic Information System) technology to realize the dynamic mapping of evaluation results at the urban scale.

[0104] The automated evaluation system supporting this invention is divided into three levels:

[0105] Perception layer (collection end): Technicians hold an App integrated with Ovi interactive map, rangefinder and species identification functions to input data in real time.

[0106] Logic layer (cloud server): Stores a blacklist database of alien invasive species and a feature library of Hainan native plants. The R language algorithm module is responsible for the second-level accounting of the above complex indices.

[0107] Presentation layer (visualization terminal): Urban planners can view the heat map of urban green space homogenization distribution through the Web end, identify which parks belong to the similar areas of "thousands of parks with the same appearance", and obtain replanting suggestions at one click.

[0108] Implementation cases and function verification:

[0109] Taking Haikou Binhai Park as an example, the system detected a similarity of 0.85 (severe homogenization) between it and a Bray-Curtis landscape in a park in Sanya, mainly due to the overuse of exotic palm trees. By comparing it with natural forests in northern Hainan, the system automatically suggested introducing native plants such as *Solanum hainanense*, *Potamogeton pectinata*, and *Pteris vittata*, and recommended landscape reconstruction incorporating elements of the arcade buildings typical of northern Hainan. Simulation results showed that after implementing this solution, plant identification increased by 40%, while reducing manual maintenance (irrigation / weeding) costs by 30%.

[0110] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method for assessing the homogeneity of urban green spaces based on the coupling of plant landscape culture, characterized in that: Includes the following steps: Step 1: Construct a multi-gradient observation field, select representative cities with climatic differences, and set up standard quadrats along the gradient of "central urban area - suburbs - natural area" in each city to collect plant community data; Step 2: Construct a plant diversity assessment model, calculate the α diversity index of vegetation within the quadrat and the β similarity index between cities, and quantify the convergence of plant composition. Step 3: Construct a landscape-culture coupling assessment dimension, and establish cultural feature identification indicators by quantifying the expression frequency and visual perception of regional cultural symbols in green landscapes. Step 4: Establish a three-dimensional coupled relationship model of "plants-landscape-culture" to analyze the driving relationship between the decline in species diversity and the homogenization of landscape design; Step 5: Based on the evaluation results, compare with the local natural secondary forest species database to automatically generate differentiated native plant configuration enhancement strategies.

2. The method for assessing the homogeneity of urban green spaces based on the coupling of plant landscape culture according to claim 1, characterized in that, The standard quadrat collection mentioned in step 1 includes: setting up a 20m×20m tree quadrat, a 5m×5m shrub quadrat, and a 1m×1m herb quadrat; The collected indicators cover plant name, diameter at breast height (for trees), crown width, plant height, number of plants, canopy coverage, and habitat information such as latitude, longitude and altitude; Furthermore, a vegetation buffer zone of at least 10m should be set at the boundary of the sample plot to eliminate interference from municipal planning.

3. The method for assessing the homogeneity of urban green spaces based on the coupling of plant landscape culture according to claim 1, characterized in that, The calculation of the β similarity index in step 2 includes: Qualitative analysis was conducted using the Jaccard and Sørensen similarity indices, while quantitative analysis was conducted using the Bray-Curtis similarity index to assess the overlap in species composition among different urban green spaces.

4. The method for assessing the homogeneity of urban green spaces based on the coupling of plant landscape culture according to claim 1, characterized in that, The regional cultural symbols mentioned in step 3 include: Qiongbei arcade building cultural elements, Li and Miao ethnic symbols, tropical rainforest natural landscape features, and plant culture and customs such as city flowers and trees; By constructing "cultural perception factors," abstract elements are transformed into quantifiable landscape recognition scores.

5. The method for assessing the homogeneity of urban green spaces based on the coupling of plant landscape culture according to claim 1, characterized in that, The coupling correlation model described in step 4 uses regression analysis or structural equation modeling to verify whether a single landscape design pattern has a negative reinforcing effect on plant diversity, thereby identifying "homogenization trap" areas.

6. The method for assessing the homogeneity of urban green spaces based on the coupling of plant landscape culture according to claim 1, characterized in that, Step 5 includes the following specific steps: The similarity of the quadrat survey data with the local natural secondary forest was compared to identify missing native key species, and suitable germplasm resources were selected according to the climate zoning of the quadrat plots.

7. The method for assessing the homogeneity of urban green spaces based on the coupling of plant landscape culture according to any one of claims 1-6, characterized in that, It also includes a "ecological function and native habitat suitability assessment" step, which is used to calculate the adaptability score of the species to be introduced in a specific urban heat island environment.

8. A system for assessing the homogenization of urban green spaces based on the coupling of plant landscape culture, implementing the method of any one of claims 1-7, characterized in that, include: Data input module: used to receive plant community parameters and geographic coordinate data obtained from quadrat surveys; Core computing engine: Built-in R language or similar algorithm module for calculating α / β diversity index and coupling correlation model; Feature library module: Stores templates of natural secondary forest vegetation and regional cultural symbol feature parameters for different climate zones; Visualization output module: used to generate heat maps of urban green space homogeneity and optimization strategy recommendations.

9. The urban green space homogenization assessment system based on plant landscape culture coupling according to claim 8, characterized in that, The system is also connected to an invasive species early warning database, which automatically removes invasive species with high invasion risk when generating improvement strategies, and prioritizes recommending native shrubs and native herbs with low maintenance costs.

10. A system for evaluating the homogenization of urban green spaces based on the coupling of plant landscape culture, as described in claim 8, is characterized in that... The system enables real-time collection and cloud synchronization of sample plot data via a mobile app, and utilizes GIS technology to dynamically map the assessment results at the city scale.

Images