المؤلفون: Jiao Yanan, Li Feixue, Chen Zhenjie, Zhang Qishun, Zhao Xin

المصدر: Redai dili, Vol 44, Iss 4, Pp 596-607 (2024)

مصطلحات موضوعية: residential green space, ecological network, circuit theory, minimum cumulative resistance, high-density built-up area, shenzhen city, Geography (General), G1-922

الوصف: High-intensity land use and fragmented habitats are becoming more prevalent with urbanization, thereby accelerating the demand for maintaining and improving the ecological connectivity of habitat patches in high-density built-up areas. Previous studies have shown that small dispersed patches are crucial for enhancing connectivity across an entire landscape. However, as an important component of urban green space, residential green space in high-density built-up areas is often overlooked in ecological connectivity analysis. Taking Futian district, Shenzhen, as a case study, we explored the ecological connectivity in high-density built-up areas considering not only habitat patches but also green areas in residential quarters. We identified ecological patches and green areas in the residential areas of the study area. This was followed by a functional connectivity analysis under different scenarios. Several protection suggestions for improving ecological connectivity have been proposed based on functional connectivity analyses under different scenarios. The results show: 1) The area of residential green space in Futian district is 3.86 km2, covering 26.9% of the total green space in the study area, with the western part being sparser than other regions. The total area of the ecological patches was 14.34 km2, and the importance of the patches was not consistent with their size. The ecological connectivity of Lianhuashan Park in the central region, Lichi Park in the eastern region, and Huanggang Park in the southern region is greatly affected by the contiguous or continuously distributed strips of residential green space around them. 2) Residential green spaces affect eco-connectivity primarily by lowering corridor resistance, creating connectors for regions that require protection, and supporting biological flow. In particular, it had the largest effect on middle-resistance corridors (the unit cost distance was reduced by 29.2%) and alleviated the situation of pinch points formed in narrow low-resistance channels in high-density built-up areas. 3) The ecological pinch points that recurred in the ecological network under different scenarios of connecting residential green spaces and different resistance thresholds were identified as the most valuable primary pinch points for protection. It is recommended to strengthen the intersection of Xinzhou Road and Fumin Road and prioritize the protection of residential green spaces located near the ecological patches and on the topological connection between the ecological patches, with a scale exceeding the average size of 5,920.22 m2. Through the analysis of pinch points in various scenarios, it was found that 21 pinch points, including those close to Lianhuashan Park, could be used as substitute green spaces for urban renewal projects when nearby residential green spaces are destroyed or occupied. This supports the preservation of functional connectivity in urban renewal projects. It is increasingly difficult to construct significant habitat patches in high-density built-up areas to compensate for habitat fractures. The results identified the significant location and proportion of residential green spaces as critical bio-flow carriers in Futian District. These findings could encourage more comprehensive urban conservation plans that incorporate both sizable habitat patches and residential green spaces. These findings can be used to create more effective sustainable development plans that encourage biodiversity in urban renewal planning.

وصف الملف: electronic resource

العلاقة: https://www.rddl.com.cn/CN/10.13284/j.cnki.rddl.003858Test; https://doaj.org/toc/1001-5221Test

الوصول الحر: https://doaj.org/article/f8832881efa5470a9e35417867ac6b4aTest

المؤلفون: Wang Ziming, Lyu Liang, Wang Feng

المصدر: Redai dili, Vol 44, Iss 2, Pp 303-314 (2024)

مصطلحات موضوعية: green infrastructure (gi) network, morphological spatial pattern analysis (mspa), minimum cumulative resistance (mcr), circuit theory, mountainous counties, wanzhou district, chongqing, Geography (General), G1-922

الوصف: The conflict between ecological protection and town development is particularly pronounced in mountainous towns with fragile ecological environments and constrained construction conditions. Cross-scale Green Infrastructure (GI) is characterized by a balance between ecological protection and human needs. The establishment of a county-level GI network can provide a shared basic framework for the development and biological conservation of mountainous towns. The Wanzhou District of Chongqing has the typical characteristics of a southwestern mountain town with ecological problems such as habitat fragmentation and reduced disturbance resistance. This study was based on the biological flow process, guided by geometric morphology, circuit, and graph theory, and it followed the logic of "hubs, links, and pinch points". First, the morphological spatial pattern analysis method was applied to identify the GI network hubs, and their importance was classified according to the current-flow betweenness centrality index. Next, an ecological resistance surface was established based on multi-source data, and the minimum cumulative resistance model was applied to identify the links. It also calculated their importance and ranked them based on the average resistance, path length, and average value of the connected hubs. Subsequently, the current-flow density distribution was analyzed, and ecological pinch points were extracted in conjunction with the links. According to the results, the GI network of Wanzhou District contains 42 hubs with an area of 996.35 km2, accounting for 28.83% of the total study area. The hubs were generally dense in the east and sparse in the west, forming a pattern of "one screen, three belts, and scattered distribution." Among them, the GI network hubs formed by the Fangdou-Qiyao Mountain group and the Yangtze River and its coastal green areas are of the greatest importance, followed by the Tiefeng Mountain, Dengfeng Reservoir, and the central-eastern forest areas, whereas the small patches scattered in the central southwest-northeast oriented valleys are of the least importance. Additionally, 80 links were identified with a total length of 292.97 km, with long paths and low importance in the eastern region and short paths and high importance in the western region. Furthermore, 142 ecological pinch points were extracted, accounting for 9.60% of the corridor length dominated by land-use types of farmlands (55.89%) and woodlands (35.71%); pinch points were mainly concentrated in the east, which is the key area in guaranteeing the ecological stability of the county GI network. Finally, this study proposes zoning, grading, and precise protection and restoration strategies based on the relative importance of hubs and links and the land-use types of ecological pinch-point areas. These strategies provide a scientific basis for decision-making to coordinate the conservation and development needs of mountain towns.

وصف الملف: electronic resource

العلاقة: https://www.rddl.com.cn/CN/10.13284/j.cnki.rddl.003777Test; https://doaj.org/toc/1001-5221Test

الوصول الحر: https://doaj.org/article/0b955ff78d544b0b8fa9029b8bc0e043Test

المؤلفون: Luanyu Zhou, Yuluan Zhao, Changli Zhu, Chao Shi

المصدر: Ecological Indicators, Vol 163, Iss , Pp 112093- (2024)

مصطلحات موضوعية: Minimum cumulative resistance model, Karst mountainous area, Scenic byway, Alignment planning, Nanpan–Beipan River Basin, Ecology, QH540-549.5

الوصف: A study of scenic byways, a new form of integrated tourism and transport developing in karst areas, is of great significance for promoting the rational use of landscape resources and sustainable development in karst areas. The rocky karst desertification area of Yunnan-Guangxi-Guizhou in the Nanpan–Beipan River Basin was taken as an example. Here, 16 factors in four dimensions of landscape visual quality, ecological suitability, transport convenience, and accessibility to resource points were selected to construct the evaluation index system of scenic byway routing. Next, a comprehensive resistance surface model was constructed based on the minimum cumulative resistance, which was then combined with the source location to simulate the optimal path and plan route selection for a scenic byway. The study shows that: (1) influenced by topography, traffic network, and resource points, the spatial distribution pattern of resistance in the Nanpan–Beipan River Basin was “low in the middle and high in the surrounding areas;” the low resistance area was mainly distributed in the central part of the watershed around the first-class scenic spots and the traffic network, while the high resistance area was distributed in the southeastern and northwestern parts of the watershed; (2) a total of 494 ecotourism corridors were generated with 273 attractions as the ecological sources, generally showing a distribution pattern of “high in the middle and low in the surrounding areas. Among them, 44 key ecological corridors were centered on valleys, 196 important ecological corridors were centered on water areas with good habitat quality, and 254 general ecological corridors were mainly important landscape types such as woodland, grassland, wetland, etc. and (3) the Karst Scenic Byway constructed in the Nanpan and Beipan River Basins as a whole formed a ring-shaped network, which was divided into the Karst Landscape Ethnic Scenic Byway and the Karst Summer Resort Three-Line Cultural Scenic Byway. This study provides a reference for the planning and construction of the Karst Mountain Scenic Byway in China.

وصف الملف: electronic resource

العلاقة: http://www.sciencedirect.com/science/article/pii/S1470160X24005508Test; https://doaj.org/toc/1470-160XTest

الوصول الحر: https://doaj.org/article/d363bde0e56a4beb846c3dca4b684c58Test

المؤلفون: Enle Qiao, Rukeya Reheman, Zhongxue Zhou, Siyu Tao

المصدر: Ecological Indicators, Vol 166, Iss , Pp 112325- (2024)

مصطلحات موضوعية: Landscape ecological security pattern, Ecological sources identification, Ecological stability, Minimum cumulative resistance model, Guanzhong Plain Urban Agglomeration, Ecology, QH540-549.5

الوصف: Most studies have assessed and constructed landscape ecological security patterns (LESPs) primarily from the perspective of landscape morphology by employing morphological spatial pattern analysis, with little attention paid to fundamental ecosystem attributes (such as ecosystem functions and stability). Thus, this study proposed a comprehensive evaluation and optimization framework for LESPs from the perspective of “mode function stability” by integrating assessment landscape pattern, ecological function, and landscape stability. A comprehensive evaluation and optimization of the LESPs was conducted using the Minimum Cumulative Resistance (MCR) model in the Guanzhong Plain Urban Agglomeration (GPUA) as the research area. The results showed that: (1) Generally, the landscape quality in urban agglomerations was relatively low because of the large area of agricultural vegetation, high human interference, and landscape fragmentation, which caused low levels of landscape pattern, function, and stability. (2) LESPs were mainly determined by landscape stability in urban agglomerations due to low-quality ecosystems, rapid landscape transformation, and severe anthropogenic disturbances. (3) There was a large variation in the landscape function and stability of a certain landscape type due to their different structures and human interference across space in urban agglomerations. According to assessment by “pattern-function-stability” framework, the ecological sources and corridors covered with natural forest were the crucial cornerstone to constructing LESPs, and the rivers in crop planting areas were the inevitably selected corridors, but their ecological function and stability needed further improvement in construction. (4) The framework can assess spatial patterns and ecological functions to further the stability and sustainability of the landscape in maintaining ecological security and facilitating the identification of improvement objectives or measures of individual ecological sources or corridors in regional ecological infrastructure construction practices.

وصف الملف: electronic resource

العلاقة: http://www.sciencedirect.com/science/article/pii/S1470160X24007829Test; https://doaj.org/toc/1470-160XTest

الوصول الحر: https://doaj.org/article/2ed39f0086064191a7c92fc0021558feTest

المؤلفون: Pingyang Han, Haojun Xiong, Haozhi Hu, Jiayan Zhou, Min Wang

المصدر: Ecological Indicators, Vol 166, Iss , Pp 112256- (2024)

مصطلحات موضوعية: Landscape ecological risk(LER), Land use conflict(LUC), Ecological security patterns(ESP), Minimum cumulative resistance model(MCR), Polder landscape, Urban–rural fringe, Ecology, QH540-549.5

الوصف: Jianghan Plain is an important grain-producing area in China, and the transformation of the natural environment by the long-term polder activities of the people in this area has created a characteristic polder landscape. After 2000, urbanization has led to the destruction of ecosystems in these polder landscapes, especially in sensitive areas at the urban–rural interface. ESP can help mitigate this threat by systematically identifying and connecting ecologically significant areas to enhance ecosystem stability and sustainability. In this paper, taking Dongxihu Polder as an example, we apply multi-source remote sensing data to develop LER and LUC models. Combining these with MCR model, we construct an ESP for Dongxihu Polder. The study shows that (1) the growth of LER and LUC in Dongxihu Polder is characterized by “strong dynamics, high complexity and weak protection”, which is closely related to the urban expansion of the urban–rural boundary area; (2) Watersheds, woodlands, and farmlands play an important role in controlling LERs and LUCs, so we identified 33 ecologically important source areas that are mainly concentrated in these regions; (3) In this paper, 46 ecological strategic nodes and 16 ecological corridors were extracted to construct the Dongxihu Polder ESP of “one ring, five axes, multiple points and multiple chains”, and suggested specific optimization strategies. The study provides feasible ecological management policy recommendations for the protection as well as sustainable development of Dongxihu Polder.

وصف الملف: electronic resource

العلاقة: http://www.sciencedirect.com/science/article/pii/S1470160X24007131Test; https://doaj.org/toc/1470-160XTest

الوصول الحر: https://doaj.org/article/889ae6fbe49e476f885e8d2a607d5f4bTest

المؤلفون: Jiawen Jiang, Jianwu Cai, Rui Peng, Penghan Li, Weirong Chen, Yining Xia, Jinsong Deng, Qiuyi Zhang, Zhoulu Yu

المصدر: Ecological Indicators, Vol 165, Iss , Pp 112217- (2024)

مصطلحات موضوعية: Urban Ecological Network, Ecological City (eco-city), Ecological Regulation Service Value (ERSV), Minimum Cumulative Resistance (MCR), Circuit Theory, Ecology, QH540-549.5

الوصف: Establishing an urban ecological network is a means to improve the ecological environment and enhance sustainable urban development amidst rapid urbanization. Based on the demand of eco-city, morphological spatial pattern analysis (MSPA), ecological regulation services value (ERSV), and landscape connectivity have been combined to identify ecological resources with high connectivity and ecological benefits in this study. Using the Minimum Cumulative Resistance (MCR) model, ecological corridors have been constructed and ecological critical nodes have been identified. In addition, the urban ecological network has then been optimized from the overall layout and local key nodes based on the circuit theory to balance the ecological livability and species diversity in the eco-city. The main conclusions could be demonstrated as follows: (1) 76.45% of the high ecological regulation service value areas have been identified as core areas. (2) The distribution of ecological corridors has been found uneven with significant disparities (3) The connectivity indices, especially the line point rate (β) index, have increased by 21.66%, while the robustness has increased by 75.44%. Overall, the combined methods have been used to establish and optimize the ecological network within the limited space to balance the ecological livability and biodiversity. The results of this study could provide a scientific reference for the optimization of urban ecological space and promote sustainable development in the eco-city.

وصف الملف: electronic resource

العلاقة: http://www.sciencedirect.com/science/article/pii/S1470160X24006745Test; https://doaj.org/toc/1470-160XTest

الوصول الحر: https://doaj.org/article/a802d61b283847ae9828fa4d99b84df1Test

المؤلفون: Wenhao Chen, Huimin Liu, Jinlong Wang

المصدر: Ecological Indicators, Vol 165, Iss , Pp 112169- (2024)

مصطلحات موضوعية: Ecological security pattern, Morphological spatial pattern analysis, Minimum cumulative resistance, Greedy algorithm, Ecological networks, Ecology, QH540-549.5

الوصف: Ecological security pattern (ESP) represents a sound spatial arrangement of ecosystem occurring in landscape. The research on the optimization of ESP aims to improve and restore the ecosystem functions by rationally allocating and optimizing the ecological elements based on the key ecological issues. Constructing and optimizing ESP can enhance the connectivity of regional habitat patches, which is of great significance for protecting and restoring biodiversity, improving ecosystem stability and resilience, and achieving regional sustainable development. However, it is a challenging task to systematically improve the connectivity and resilience of regional ecological networks under attacks. Little research has been done on enhancing the resilience of ecological networks under edge-based attacks. Based on morphological spatial pattern analysis (MSPA), minimum cumulative resistance (MCR) and greedy algorithm (GA) models, this study presents a new method to construct and optimize ESP. The Dongting Lake Basin in China, which is a typical region with rich biodiversity, complex landscape patterns, and intensive human activities, is taken as an example. The results indicate that the optimization of the ecological network has improved its connectivity by 51.62%, its robustness against random edge-based attacks by 41.13%, and its robustness against targeted edge-based attacks by 43.41%, relative to the initial ecological network. Monte Carlo test verifies the reliability of the optimization solution. The proposed method can be used for finding the network structure with the best robustness for specific edge-based attacks, and it provides valuable decision-making reference for ecological land planning and biodiversity conservation.

وصف الملف: electronic resource

العلاقة: http://www.sciencedirect.com/science/article/pii/S1470160X24006265Test; https://doaj.org/toc/1470-160XTest

الوصول الحر: https://doaj.org/article/57871d98e70b4580b1c472ca8bb83dafTest

المؤلفون: Fangyuan Zhang, Yanyan Jia, Xinlong Liu, Tianlu Li, Qingrui Gao

المصدر: Ecological Indicators, Vol 160, Iss , Pp 111887- (2024)

مصطلحات موضوعية: Ecological security pattern, Morphological spatial pattern analysis, Minimum cumulative resistance model, Ecological sources, Ecological corridors, Dawen River basin, Ecology, QH540-549.5

الوصف: Building an ecological security pattern (ESP) can safeguard and improve the structure, functions and services of regional ecosystems. Furthermore, it is also one of the significant spatial methods to mitigate the conflict between ecological conservation and economic growth. Most previous researches on the construction of ESP have directly utilized extensive regions of forestland, grassland, water area or nature reserves as ecological sources (ESs) without weighing the habitat quality (HQ) and ecological protection red line (EPRL). The ES of the Dawen River basin (DRB) was identified through morphological spatial pattern analysis (MSPA) and landscape connectivity index. By employing the minimum cumulative resistance model (MCR), the potential ecological corridor (EC) was identified, and its importance was evaluated by gravity model. Simultaneously, the spatial properties of HQ and ecological resistance (ER) were analyzed. Finally, this paper proposed an optimization strategy for ESP in accordance with the EPRL. The results indicate that: (1) The DRB contained 15 important ESs, mainly concentrated in water and mountain forest areas. (2) 105 ECs were extracted by MCR and gravity model, including 35 level 1 corridors and 70 level 2 corridors, which were primarily concentrated in the eastern region of the basin. (3) Based on the spatial characteristics of HQ and ER, as well as the EPRL in the research, the ESP of “one axis, two belts and five zones” in the DRB was constructed and control strategies were proposed. This research offers some reference for ecological environment protection and restoration and regional sustainable development in the Yellow River basin.

وصف الملف: electronic resource

العلاقة: http://www.sciencedirect.com/science/article/pii/S1470160X24003443Test; https://doaj.org/toc/1470-160XTest

الوصول الحر: https://doaj.org/article/9bb5cc66d183442f82d20cdb76bbb66eTest

المؤلفون: Qi Yuan, Rui Li

المصدر: Ecological Indicators, Vol 157, Iss , Pp 111257- (2023)

مصطلحات موضوعية: Urbanization, Karst, Ecological corridor, Rocky desertification, Minimum Cumulative Resistance model, Ecological safety, Ecology, QH540-549.5

الوصف: Karst mountain cities are important population agglomerations in southwestern China, as well as integral components of the significant regional economic belt - the Central Guizhou Economic Belt. Ecological corridors serve as crucial pathways for species migration and play a vital role in integrating regional habitats, particularly in the highly fragmented and ecologically vulnerable karst areas. However, it is not yet clear how human activities and natural factors drive the distribution of ecological corridors in the rapidly expanding urban areas of karst region. In light of this, based on multi-source data from 2005 to 2020, this study identified ecological source areas using ecological sensitivity analysis and a resistance surface model was adjusted using the rocky desertification factor. The Minimum Cumulative Resistance (MCR) model was employed to extract ecological corridors for each of the four time periods. Furthermore, space syntax analysis was conducted to evaluate the selection, integration, and depth of the corridors under different levels of urbanization. Finally, correlation analysis in R language was performed to determine the degree of influence of various driving factors on the distribution of ecological corridors. Our findings indicate that during the urbanization process, the negative impact of human disturbance factors on corridor distribution in highly urbanized areas has decreased. And the overall development of ecological corridors in the research region has shown improvement over the past 20 years. However, extreme climatic conditions have negatively affected the distribution of ecological corridors. Additionally, policy-driven measures will have an impact on the distribution of ecological corridors. By exploring the spatiotemporal differentiation and driving mechanisms of corridors in Karst mountain cities over the past two decades, our research will provide scientific evidence for biodiversity conservation and the construction of ecologically secure environments in karst areas.

وصف الملف: electronic resource

العلاقة: http://www.sciencedirect.com/science/article/pii/S1470160X23013997Test; https://doaj.org/toc/1470-160XTest

الوصول الحر: https://doaj.org/article/4400f17cc26b40b991a846c622b8bbeeTest

المؤلفون: Yicheng Huang, Jinbing Zhang, Pengyan Zhang, Zhuo Chen, Xinyue Zhang, Rong Lu, Mengfan Li, Guangrui Xing, Yongpeng Song

المصدر: Frontiers in Ecology and Evolution, Vol 11 (2023)

مصطلحات موضوعية: landscape ecological risk assessment, ecological security patterns, spatial principal component analysis, minimum cumulative resistance model, the affected area of the Lower Yellow River, Evolution, QH359-425, Ecology, QH540-549.5

الوصف: In the context of urban expansion and climate change, the world is under pressure from multiple ecological risks. Key ecological protection areas play a pivotal role in preserving ecological stability and promoting development. Due to its unique geographical conditions, the Yellow River basin has been facing huge ecological risk pressure. In the affected area of the Lower Yellow River (AALYR) as an agricultural hub, ecological protection has gradually become a key factor restricting the development of cities and agriculture. Taking AALYR as an example, the landscape ecological risk assessment (LERA) system is established based on three aspects “natural environment—human society—landscape pattern”. We construct a comprehensive cumulative resistance surface based on the risk assessment results as the basis for the future study. Ecological corridors are identified by minimum cumulative resistance (MCR) models to establish and optimize Ecological security pattern (ESP) in the AALYR. We found that the landscape ecological risks (LER) in the study area show a uniform spatial distribution, with a slightly higher distribution in the northeast than the southwest. The ecological risk levels are generally high in AALYR, indicating a more severe risk problem in this area. A total of 56 ecological sources were identified, with a total area of 21176 km2. The ecological sensitivity of AALYR was high, and 99 ecological corridors and 59 ecological nodes were extracted. Ecological corridors and nodes were consistently and densely distributed throughout the study area. The network analysis method improves the stability of the network structure after optimization. Based on the key components of the ESP, with the combination of geographical characteristics and local policy planning guidance, we constructed the “One Belt and One Axis, Two Cores and Two Corridors, Four zones” ESP. The study results may offer guidance and suggestions for the construction of ESP and ecological environment protection system in the world’s major river basins, and may also provide information for ecological planning of other similar river basins in the world.

وصف الملف: electronic resource

العلاقة: https://www.frontiersin.org/articles/10.3389/fevo.2023.1271352/fullTest; https://doaj.org/toc/2296-701XTest

الوصول الحر: https://doaj.org/article/a4353816e47349bb9fd88accbaf87e2bTest