Ecological Function Regionalization Research Articles

Analysis of spatio-temporal changes in net primary productivity and their driving factors in ecological functional areas of the Yellow River Basin

The Yellow River Basin (YRB) is an important region for both ecological and economic growth in China, and a healthy and stable ecological environment is fundamental to achieving high-quality development. Investigating the spatio-temporal changs of vegetation carbon sinks in the YRB is necessary to improve understanding of the regional carbon cycle. This study analyzed the YRB using the Google Earth Engine (GEE) platform. The basin was divided into sections based on ecological function regionalization schemes. We applied Theil-Sen median trend analysis and Spearman correlation analysis, along with the lasso regression model, to examine the NPP's temporal and spatial patterns and its driving factors in these regions. The objective was to examine the NPP’ s temporal and spatial patterns and its driving factors in these regions, identifying commonalities within regions and differences between regions, while analyzing in a targeted manner the lack of vegetation carbon sequestration in ecological areas. This study highlighted the importance of ecological engineering in ecological civilization and carbon neutrality, providing scientific theoretical support and a decision-making basis for the realization of carbon neutrality. The research results indicate significant upward trends (p<0.001) in both the average annual NPP (AANPP) growth rate (57.98%) and the total annual NPP (TANPP) growth rate (41.9%) in the YRB from 2001 to 2020. The multi-year average NPP (MYANPP) exhibit a spatial distribution with high values in the south and low values in the north. The spatial distribution of NPP exhibits notable spatial aggregation and heterogeneity, where regions demonstrating improvement trends constitute 93.01% of the area, and approximately 79.73% of this region displays low volatility. A high-value area is concentrated in the Agroecological Zone of the Fenwei Basin (I-11), the Loess Plateau Agriculture and Grassland Ecological Zone (I-12), and the Qinba Mountains Deciduous and Evergreen Broad-leaved Forest Ecological Zone (I-15), with significant spatial differences. Temperature, precipitation, and forests are the foremost elements affecting NPP in the YRB, exhibiting positive correlations. Conversely, farmland displays negative correlations. Overall, NPP shows an increasing trend in all ecological function areas, and the NPP of the YRB shows a trend of improvement as a whole, as the ecological environment of the YRB has improved significantly.

Incorporating ecosystem services into functional zoning and adaptive management of natural protected areas as case study of the Shennongjia region in China

Against the background of global climate change and anthropogenic interference, studying the spatial and temporal heterogeneity of ecosystem services in important ecological function regions and rationally dividing the functional zones will help to promote the construction of the natural protected areas system dominated by national parks. The Shennongjia Region is an important candidate for China's national parks and one of the key pilots. Integrating the InVEST model, Getis-Ord Gi* index, hotspot analysis, GeoDetector and K-means clustering algorithm, we measured five ecosystem services interactions and delineate the functional zones. The results show that the spatial and temporal evolution of various ecosystem services in the Shennongjia Region between 2000 and 2020 was significant. All ecosystem services showed a decreasing and then increasing trend, except for carbon storage, which slowly declined. The ecological status of the region is in the process of polarization, with the local environment showed a trend of continuous deterioration. Water yield-habitat quality and carbon storage-water purification showed synergistic relationships; soil conservation showed trade-offs with water yield, carbon storage and water purification over a wide spatial range. The interaction between land surface temperature and vegetation cover was the most significant dominant factor. Hot spots for the comprehensive ecosystem services index were mainly located in the central and southern parts of the Shennongjia region and four types of ecosystem service functional zones were identified accordingly. This study is of great significance for maximizing the benefits of ecosystem service functions, the efficient allocation of environmental resources and the rational formulation of management policies in natural protected areas.

Identifying the uneven distribution of health and education services in China using open geospatial data

Growing attention has been directed to the use of satellite imagery and open geospatial data to understand large-scale sustainable development outcomes. Health and education are critical domains of the Unites Nations’ Sustainable Development Goals (SDGs), yet existing research on the accessibility of corresponding services focused mainly on detailed but small-scale studies. This means that such studies lack accessibility metrics for large-scale quantitative evaluations. To address this deficiency, we evaluated the accessibility of health and education services in mainland China in 2021 using point-of-interest data, OpenStreetMap road data, land cover data, and WorldPop spatial demographic data. The accessibility metrics used were the least time costs of reaching hospital and school services and population coverage with a time cost of less than 1 h. On the basis of the road network and land cover information, the overall average time costs of reaching hospital and school were 20 and 22 min, respectively. In terms of population coverage, 94.7% and 92.5% of the population in China has a time cost of less than 1 h in obtaining hospital and school services, respectively. Counties with low accessibility to hospitals and schools were highly coupled with poor areas and ecological function regions, with the time cost incurred in these areas being more than twice that experienced in non-poor and non-ecological areas. Furthermore, the cumulative time cost incurred by the bottom 20% of counties (by GDP) from access to hospital and school services reached approximately 80% of the national total. Low-GDP counties were compelled to suffer disproportionately increased time costs to acquire health and education services compared with high-GDP counties. The accessibility metrics proposed in this study are highly related to SDGs 3 and 4, and they can serve as auxiliary data that can be used to enhance the evaluation of SDG outcomes. The analysis of the uneven distribution of health and education services in China can help identify areas with backward public services and may contribute to targeted and efficient policy interventions.

Delimiting Ecological Space and Simulating Spatial-Temporal Changes in Its Ecosystem Service Functions Based on a Dynamic Perspective: A Case Study on Qionglai City of Sichuan Province, China

Delimiting ecological space scientifically and making reasonable predictions of the spatial-temporal trend of changes in the dominant ecosystem service functions (ESFs) are the basis of constructing an ecological protection pattern of territorial space, which has important theoretical significance and application value. At present, most research on the identification, functional partitioning and pattern reconstruction of ecological space refers to the current ESFs and their structural information, which ignores the spatial-temporal dynamic nature of the comprehensive and dominant ESFs, and does not seriously consider the change simulation in the dominant ESFs of the future ecological space. This affects the rationality of constructing an ecological space protection pattern to some extent. In this study, we propose an ecological space delimitation method based on the dynamic change characteristics of the ESFs, realize the identification of the ecological space range in Qionglai City and solve the problem of ignoring the spatial-temporal changes of ESFs in current research. On this basis, we also apply the Markov-CA model to integrate the spatial-temporal change characteristics of the dominant ESFs, successfully realize the simulation of the spatial-temporal changes in the dominant ESFs in Qionglai City's ecological space in 2025, find a suitable method for simulating ecological spatial-temporal changes and also provide a basis for constructing a reasonable ecological space protection pattern. This study finds that the comprehensive quantity of ESF and its annual rate of change in Qionglai City show obvious dynamics, which confirms the necessity of considering the dynamic characteristics of ESFs when identifying ecological space. The areas of ecological space in Qionglai city represent 98307 ha by using the ecological space identification method proposed in this study, which is consistent with the ecological spatial distribution in the local ecological civilization construction plan. This confirms the reliability of the ecological space identification method based on the dynamic characteristics of the ESFs. The results also show that the dominant ESFs in Qionglai City represented strong non-stationary characteristics during 2003–2019, which showed that we should fully consider the influence of the dynamics in the dominant ESFs on the future ESF pattern during the process of constructing the ecological spatial protection pattern. The Markov-CA model realized the simulation of spatial-temporal changes in the dominant ESFs with a high precision Kappa coefficient of above 0.95, which illustrated the feasibility of using this model to simulate the future dominant ESF spatial pattern. The simulation results showed that the dominant ESFs in Qionglai will still undergo mutual conversions during 2019–2025 due to the effect of the their non-stationary nature. The ecological space will still maintain the three dominant ESFs of primary product production, climate regulation and hydrological regulation in 2025, but their areas will change to 32793 ha, 52490 ha and 13024 ha, respectively. This study can serve as a scientific reference for the delimitation of the ecological conservation redline, ecological function regionalization and the construction of an ecological spatial protection pattern.

Ecological function regionalization of the core area of the Beijing-Hangzhou Grand Canal based on the leading ecological function perspective

The establishment of scientific and reasonable ecological function regionalization (EFR) plays an important role in giving full play to regional advantages and realizing the benign development of resource exploitation, ecological construction, and environmental protection. However, the existing EFR lacks the identification ability for the leading functions among various ecological functions, and it is difficult to determine the regional ecological advantages, which may hinder the practical application of EFR in ecological environment zoning management. In view of this, we propose a new leading ecological function (LEF) index and the corresponding calculation method to describe the main regional ecosystem services and functions; its application in EFR could enhance the regional spatial guidance effect. We took the Core Area of the Beijing-Hangzhou Grand Canal (CA-BHGC) in China as the study area and used the maximum value composite (MVC) method to identify the LEFs of acquired grid pixels. Furthermore, the LEFs of grid pixels were applied to county-level administrative regions to complete the EFR process. Based on the results, in the CA-BHGC, although the spatial distribution of ecological function values was extremely uneven, the contribution rate of the LEF of grid pixels to the comprehensive ecological function value was usually more than 50%, reliably representing the advantageous ecological functions of grid pixels. The LEFs of the CA-BHGC included biodiversity maintenance, food production, and water retention, with grid proportions of 51.64%, 41.04%, and 6.93%, respectively, highlighting the global ecological resource advantages. The functional areas designated based on LEFs showed a good spatial correlation with the natural geographical environment. The seven biodiversity maintenance areas were mostly located at the river confluence; the two water retention areas were in the south of the Qinling-Huaihe River Line, and the six food production areas were in the central plain. In addition, the EFR process comprehensively considered the LEFs, river reaches, and provincial divisions, and it might be easier to coordinate various conflicts of interest, including economic development and ecological protection, cross-administrative regions, and adjacent functional areas.

Accounting of gains and losses of ecological assets in counties of key ecological function regions in Yangtze River Delta

Accounting of gains and losses of ecological assets in counties of key ecological function regions in Yangtze River Delta

Spatial-Temporal Variation Characteristics and Influencing Factors of Vegetation in the Yellow River Basin from 2000 to 2019

Vegetation is a crucial and intuitive index that can be used to evaluate the ecological status. Since the 20th century, land use has changed significantly in Yellow River Basin (YRB), along with great changes of vegetation, serious soil erosion, and gradual ecological deterioration. To improve the ecological environment in the YRB, China has carried out a series of ecological protection projects since the 1970s. Therefore, long-term sequence monitoring of vegetation in YRB is necessary to show the conservation effect and better support the further protection and restoration. This study analysed vegetation changes from 2000 to 2019 based on an annual mean fractional vegetation cover (FVC) dataset. The Theil–Sen median trend analysis method was used to analyse trends in FVC. The results showed that the vegetation in the YRB has improved significantly, with an average annual growth rate of 0.65%, and the ‘green line’ of vegetation has moved approximately 300 km westward. The influence of climate on vegetation is essential; therefore, this study also analysed the influence of temperature and precipitation on vegetation over time and space. Ecological control and afforestation are important anthropogenic factors that affect vegetation. The growth trend (0.6%/a) in key ecological function regions (KEFRs) was the fastest, and even though the protection measures are not strict, they provide space for afforestation. The China Ecological Conservation Red Line (CECRL) and the national nature reserves (NNRs) showed relatively flat trends. Ecological afforestation projects were closely correlated with the growth trend of the FVC. The correlation between FVC and the intensity of ecological engineering was significant in typical areas.

Construction and Optimization of an Urban Ecological Security Pattern Based on Habitat Quality Assessment and the Minimum Cumulative Resistance Model in Shenzhen City, China

The rapid development of urbanization has caused many ecological issues and greatly threatened the sustainable development of human society. The construction of ecological security patterns (ESPs) offers an effective way to balance ecological conservation and urbanization. This study aimed to take the highly urbanized city of Shenzhen, China, as a study area to construct an urban ESP and put forward suggestions for the urban development of ecological security. Ecological sources were identified through the Habitat Quality module in the InVEST model, and ecological corridors, strategic ecological nodes, and stepping-stone patches were extracted based on the minimum cumulative resistance (MCR) model. These elements together constituted the ESP. In particular, with the results of the continuous decline in the overall habitat quality, this study identified ten ecological sources with superior habitat quality, mainly distributed in rural woodlands, in urban green land, and in forest park patches. An optimized pattern for Shenzhen City with one axis, three belts, and four zones is proposed, with the study area divided into an ecological preservation zone, a limited development zone, an optimized development zone, and a key development zone. Moreover, forty-five ecological corridors were extracted and graded into three levels, presenting a spatial pattern of one axis and three belts. The appropriate widths of these ecological corridors were suggested to be between 30 and 60 m in Shenzhen City. In addition, we identified twenty-five ecological nodes, sixteen ecological fracture points, and sixteen stepping stones to improve the maintenance and construction of the ecological corridor network. More generally, this study demonstrates a scientific approach to identifying ESPs based on habitat quality, and can serve as a reference for the planning of urban ecological function regionalization.

Ecological Optimization of Spatial Patterns of Water Conservancy landscape in Qilian Mountains based on land processes: a case study of Zamu River Basin in Upper Shiyang River Basin

Based on the relation of the ecological landscape to its ecological function, this paper takes Zamu river basin in upper Shiyang river as an example, which located in the cold region of Qilian Mountains in northwestern of China. With the use of the remote sensing data, the spatial information processing technology of GIS, suitability evaluation with the overall optimization of land use patter is applied to ascertain the function zoning and ecological pattern components of land use, to develop approaches to the ecological optimization of the spatial pattern of water conservation landscape in the mountains region. The results show that: With Zamu river basin as the research object, based on the source of the water conservation ecological landscape of frozen soil and water conservation forest, considering the zonal distribution of the frozen soil and water conservation forests in order to classification of factors such an slope, elevation, vegetation cover type and so on, we divided Zamu river valley into five ecological function regions. There are the water conservation core, water conservation buffer, water conservation excessive area, water conservation area and human development and utilization of the edge area. Also we put forward the countermeasures for protecting the each function.

Spatiotemporal Characteristics and Driving Force of Ecosystem Health in an Important Ecological Function Region in China.

Quantitative assessment can scientifically determine the health status of a regional ecosystem, identify regional eco-environmental problems, and assist in promoting regional sustainable development and environmental management. Taking China’s important ecological function region, the Yellow River affected area as an example, this study constructed an extended evaluation index system based on the pressure-state-response framework, and remote sensing and GIS techniques were used to dynamically evaluate the spatial and temporal characteristics of ecosystem health in the study area. Furthermore, influencing factors on ecosystem health in the study area were extensively analyzed using the GeoDetector model. The results show that the ecosystem health level in the study area shows significant spatial heterogeneity from 1995–2015, and showed a fluctuating change process. Areas with large fluctuations in health level were mainly distributed in extreme climate areas, ecologically fragile areas, on plains and in hilly areas. Spatial differences of ecosystem health were well explained by using the biological abundance index, relief degree of land surface, soil type, annual average precipitation, elevation, annual average temperature, and population density. Influencing factors have significant interactive effects on ecosystem health.

Urban Atmospheric Environment Quality Assessment by Naturally Growing Bryophytes in Central China.

Bryophytes are popular biomonitoring plants for atmospheric environments. The objectives of this study were to examine the characteristics of bryophyte communities, determine a suitable monitor species, and assess urban atmospheric environment quality by the joint use of bryophyte features and chemical properties in a large city in China. A pleurocarpous feather moss Haplocladium angustifolium was recognized as a good biomonitor of atmospheric deposition in central China by investigating bryophyte communities and habitat environment in various ecological function regions of the urban areas in Wuhan. The concentrations of trace elements, including As, Cd, Co, Cr, Cu, Mn, Ni, V, Pb, and Zn, in moss and soil samples from 25 sampling sites were analyzed by inductively coupled plasma mass spectrometry. The concentrations of Cd and Zn in Haplocladium angustifolium collected from the entire study area were much higher than those in substrate soil. Cd was at the highest ecological risk level among the 10 elements, which contributed 34.5% to the potential ecological risk index (RI). An RI value of 392.8 indicated that urban atmospheric quality in Wuhan was in a considerable potential ecological risk. The index of atmospheric purity, regarding species richness, cover, and frequency of bryophytes, was spatially and negatively correlated with RI, also demonstrated the atmospheric quality. Effective measures should be considered to alleviate certain airborne trace element contamination and protect the environment and human health in this metropolis.

白洋淀湿地生态功能评价及分区

PDF HTML阅读 XML下载 导出引用 引用提醒 白洋淀湿地生态功能评价及分区 DOI: 10.5846/stxb201901280209 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: 中国地质调查局项目（DD20189142）；"白洋淀湿地演化及生态功能评价"（WT2018161B） Ecological function evaluation and regionalization in Baiyangdian Wetland Author: Affiliation: Fund Project: Supported by project of China Geological Survey “Monitoring of Carrying Capacity of Resource and Environment of Xiong"an New Area and Construction of Digital Platform of Transparent Xiong"an” (No. DD20189142); project of “Monitoring and Evaluating of Ecosystem Function of Baiyangdian Wetland” (No. WT2018161B) 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:白洋淀湿地在雄安新区建设过程中具有重要生态安全保障作用。开展白洋淀湿地生态功能评价及分区研究，为生态环境治理和保护提供科学依据，是当前普遍关切和急需解决的问题之一。面向白洋淀湿地生态保护和管理的需求，在明确白洋淀自然环境特征和主要生态环境问题的基础上，结合外业调查、遥感、综合评价等方法，从水产品供给功能、水生植物供给功能、气候调节功能、生物多样性维护功能、水质改善功能5个方面评价了白洋淀湿地生态系统服务功能重要性，从水污染敏感性、湿地变化敏感性、重要自然与文化价值敏感性3个方面评价了白洋淀湿地生态系统敏感性。基于评价结果，将白洋淀湿地初步划分为7个一级生态功能区和19个二级生态功能区。在分区方法方面体现了白洋淀湿地人地关系动态特征，分区结果注重现状与历史相结合，有助于服务未来淀区生态保护规划决策实施。建议在实施白洋淀生态环境治理和保护过程中，依据白洋淀湿地生态功能分区特征，实行分区管制，制定对应的生态环境治理和保护措施。 Abstract:Baiyangdian Wetland is located in Xiong'an New Area, with important ecological functions and special strategic position. For a long time, the Baiyangdian Wetland has gradually shrunk and even dried up under the combined effects of human activities and climate change. It is of great significance to study the carrying capacity of ecological and environmental in the Xiong'an New Area by understanding the ecological function and regionalization of the Baiyangdian Wetland ecosystem. This is one of the current widespread concerns and urgent problems to be solved. In order to meet the needs of ecological protection and management of Baiyangdian Wetland, this study evaluated and regionalized the ecological functions by combining methods of field survey, remote sensing, and comprehensive evaluation. Images of Landsat MSS/TM/ETM+/OLI in 1975-2018 and GF-2 PMS in 2017 and 2018 were acquired to analyze land use/land cover change. Firstly, on the basis of clarifying characteristics of natural environment and main ecological problems of Baiyangdian wetland, the indicators system was constructed for evaluating ecosystem service function and ecological sensitivity. Secondly, the ecosystem service functions were evaluated from five aspects:supplying of aquatic products, supplying of aquatic plants, climate regulation, biodiversity maintenance, and improvement of water quality. The ecosystem sensitivities were evaluated from three aspects:water pollution, wetland changes as well as importance of natural and cultural values. Finally, based on results of evaluation, the Baiyangdian Wetland was initially regionalized into seven first-level ecoregions and nineteen second-level ecoregions. We combined ecological processes and impacts of human activities into ecological regionalization, reflecting the dynamic characteristics of human-land relationships in Baiyangdian Wetland. The results covered spatial and temporal characteristics of the ecological environment, which could help manager to make decisions for the ecological protection planning in the future. We suggested that regionalization-oriented measures should be formulated according to the ecoregions characteristics in the process of implementing project of ecological environment protection and management in Baiyangdian Wetland. 参考文献 相似文献 引证文献

The Relative Importance of Spatial Scale Variables for Explaning Macroinvertebrate Richness in Different Aquatic Ecological Function Regions

Identifying the key drivers of aquatic fauna structuring at multiple spatial scales is critical in reducing biodiversity loss. Macroinvertebrates are the most sensitive indicators of disturbance and they are used as a cost-effective tool for bioassessment at catchment and site scales. The focus of our study was to identify the key drivers from three classes of environmental variables (geophysical landscape, land use, and site habitat) that influence macroinvertebrate richness in different aquatic ecological function regions (AEFRs) of the Liaohe River Basin. We sampled macroinvertebrate assemblages, extracted geophysical and climate variables from geospatial data, and quantified physical and chemical habitats from 407 randomly distributed sites that belong to the three level-I AEFRs. We analyzed our data through multiple linear regression models by using the three classes of predicted variables alone and in combination. The models that were constructed in the first level-I AEFR explained similar amounts of macroinvertebrate richness and had the maximum ability to explain how macroinvertebrate richness distributed (denoted “explaining ability”; geophysical landscape: RGL2 ≈ 60%, land use and site habitat: RLU2 and RSH2 ≈ 50%, and combined: RCB2 ≈ 75%). The explaining abilities for the third level-I AEFR were as follows: RGL2 ≈ 11%, RLU2 ≈ 14%, RSH2 ≈ 25%, and RCB2 ≈ 38%. The explaining abilities for the 4th level-I AEFR were as follows: RGL2 ≈ 30%, RLU2 ≈ 7%, RSH2 ≈ 40%, and RCB2 ≈ 55%. We conclude that: (1) all of the combined models explained more interaction as compared with the single models; (2) the environmental variables differed among different level-I AEFRs; and, (3) variables in the site habitat scale were the most robust explainers when analyzing the relationship between environmental variables and macroinvertebrate richness and they can be recommended as the optimal candidate explainer. These results may provide cost-effective tools for distinguishing and identifying the drivers of sensitive aquatic organisms at regional scales.

Willingness to pay for ecological function regions protection based on a choice experiment method: a case study of the Shiwandashan nature reserve

The ecological function regions have enormous environmental and social value, and its protection and sustainable development need to sacrifice local economic development and local people’s land development rights and interests. Therefore, it is important to study the willingness to pay for ecological protection in the ecological function region to calculate the amount of ecological compensation. Here, we conducted a choice experiment method and MNL model to explore this issue. The obtained results show that: 1. Respondents’ willingness to pay for the attribute of environmental quality is strongest, followed by the area of the nature reserve, while the emphasis on development intensity is relatively weak in Model 1 and Model 2. 2. Education level (5.097), number of family members (− 0.429), industry (0.135), annual household income (0.089), and age (0.032) all significantly influence the willingness to pay. 3. According to the results of the CE method, respondents are willing to pay about CNY 441.66 for ecological protection per year.

Trade-offs in ecosystem services based on a comprehensive regionalization method: a case study from an urbanization area in China

The lack of effective management of ecosystem services is the main reason for ecosystem degradation; it is an urgency to apply ecosystem service assessment (ESA) to ecosystem management. Ecological function regionalization is a prerequisite job. This study mainly aimed to develop a methodological framework for comprehensive regionalization (CR) and then to find the optimal development scenario by analyzing the trade-offs in eight ecosystem service values (ESVs) of different zones. The data were collected from 2000 to 2010 for a typical urbanization area in China. We used ESA, spatial clustering analysis, and scenario analysis to develop a CR method, and explore the optimal scenario further by analyzing trade-offs of ESVs. The results showed that the increment of total ESVs experienced an ascending trend from the middle to the periphery area during the period 2000–2010. Then, the study area was divided into four zones, namely synergetic development zone, ecological conservation zone, ecological degradation zone, and economic development zone. Finally, in seven scenarios, the protection and development scenario is the optimal situation, with the most balanced increments of eight ESVs. It also suggests that this regionalization result coincides well with the existing ecological protection planning, and this optimal scenario is consistent with the overall land use planning. It demonstrates the applied integrated regionalization, in combination with scenario analysis and trade-offs analysis, helps understanding and communicating index to examine the implications of land use changes for ecosystem management and provides further insights into policy making to develop differentiated ecological compensation mechanism.

A process of aquatic ecological function regionalization: The dual tree framework and conceptual model

Aquatic ecological regionalization and aquatic ecological function regionalization are the basis of water environmental management of a river basin and rational utilization of an aquatic ecosystem, and have been studied in China for more than ten years. Regarding the common problems in this field, the relationship between aquatic ecological regionalization and aquatic ecological function regionalization was discussed in this study by systematic analysis of the aquatic ecological zoning and the types of aquatic ecological function. Based on the dual tree structure, we put forward the RFCH process and the diamond conceptual model. Taking Liaohe River basin as an example and referring to the results of existing regionalization studies, we classified the aquatic ecological function regions based on three-class aquatic ecological regionalization. This study provided a process framework for aquatic ecological function regionalization of a river basin.

Application of Entropy Method in River Health Evaluation Based on Aquatic Ecological Function Regionalization

With the implementation of water environment management in key basins in China, the monitoring and evaluation system of basins are in urgent need of innovation and upgrading. In view of the heavy workload of existing evaluation methods and the cumbersome calculation of multi-factor weighting method, the idea of using entroy method to assess river health based on aquatic ecological function regionalization was put forward. According to the monitoring data of songhua river in the year of 2011-2015, the entropy weight method was used to calculate the weight of 9 evaluation factors of 29 monitoring sections, and the river health assessment was carried out. In the study area, the river health status of the biodiversity conservation function area (4.111 point) was good, the water conservation function area (3.371 point), the habitat maintenance functional area (3.262 point), the agricultural production maintenance functional area (3.695 point) and the urban supporting functional area (3.399 point) was light pollution.

Ecological function regionalization of cultural heritage sites in Turpan, China, based on GIS

The protection for historical and cultural heritage and their surrounding environments is much more important than any other preventive efforts made by humans, so how to protect them and achieve sustainable utilization should be a priority. Regionalization is an efficient and a sustainable tool to manage the protected areas. In this study, based on regionalization of natural protected areas theory, we used ecological sensitivity analysis to regionalize the heritage sites in Turpan, China. Factors for the analysis are topography, ecological environments, human activity, and landscape resources. Based on the analysis of environmental status and spatial variation of ecological sensitivity in Turpan, this paper aims at developing a regionalization scheme and provides a scientific basis for protection and restoration of vulnerable historical and cultural sites. Our study results showed that 75% of the heritage sites in Turpan have sensitivity which is under dangerous condition and requires better planning and protection. This study provided a reliable and scientific way to regionalize heritage sites in the study area and which also can be transferred to other locations with similar situation.

基于等级层次分析法的金沙江下游地区生态功能分区

基于等级层次分析法的金沙江下游地区生态功能分区

Spatial distribution and aggregation analysis of human activity in national key ecological function regions in China

Spatial distribution and aggregation analysis of human activity in national key ecological function regions in China