scholarly journals Peer Review #2 of "Establishing an ecological security pattern for urban agglomeration, taking ecosystem services and human interference factors into consideration (v0.1)"

2019 ◽  
Keyword(s):  
Ecosystem Services ◽  
Peer Review ◽  
Urban Agglomeration ◽  
Ecological Security ◽  
Human Interference ◽  
Security Pattern

scholarly journals Construction of the Ecological Security Pattern of Urban Agglomeration under the Framework of Supply and Demand of Ecosystem Services Using Bayesian Network Machine Learning: Case Study of the Changsha–Zhuzhou–Xiangtan Urban Agglomeration, China

2019 ◽  
Vol 11 (22) ◽  
pp. 6416 ◽  
Author(s):  
Ouyang ◽  
Wang ◽  
Zhu
Keyword(s):  
Machine Learning ◽  
Ecosystem Services ◽  
Bayesian Network ◽  
Supply And Demand ◽  
Urban Agglomeration ◽  
Ecological Security ◽  
Ecological Strategy ◽  
Ecological Corridors ◽  
Ecological Corridor ◽  
Security Pattern

Coordinating ecosystem service supply and demand equilibrium and utilizing machine learning to dynamically construct an ecological security pattern (ESP) can help better understand the impact of urban development on ecological processes, which can be used as a theoretical reference in coupling economic growth and environmental protection. Here, the ESP of the Changsha–Zhuzhou–Xiangtan urban agglomeration was constructed, which made use of the Bayesian network model to dynamically identify the ecological sources. The ecological corridor and ecological strategy points were identified using the minimum cumulative resistance model and circuit theory. The ESP was constructed by combining seven ecological sources, “two horizontal and three vertical” ecological corridors, and 37 ecological strategy points. Our results found spatial decoupling between the supply and demand of ecosystem services (ES) and the degradation in areas with high demand for ES. The ecological sources and ecological corridors of the urban agglomeration were mainly situated in forestlands and water areas. The terrestrial ecological corridor was distributed along the outer periphery of the urban agglomeration, while the aquatic ecological corridor ran from north to south throughout the entire region. The ecological strategic points were mainly concentrated along the boundaries of the built-up area and the intersection between construction land and ecological land. Finally, the ecological sources were found primarily on existing ecological protection zones, which supports the usefulness of machine learning in predicting ecological sources and may provide new insights in developing urban ESP.

scholarly journals The Construction and Optimization of Ecological Security Pattern in the Harbin-Changchun Urban Agglomeration, China

2019 ◽  
Vol 16 (7) ◽  
pp. 1190 ◽  
Author(s):  
Rong Guo ◽  
Tong Wu ◽  
Mengran Liu ◽  
Mengshi Huang ◽  
Luigi Stendardo ◽  
...  
Keyword(s):  
Urban Agglomeration ◽  
Ecosystem Functions ◽  
Ecological Security ◽  
Least Cost Path ◽  
Rapid Urbanization ◽  
Songhua River ◽  
Urban Agglomerations ◽  
Ecological Corridors ◽  
Ecological Protection ◽  
Security Pattern

Urban agglomerations have become a new geographical unit in China, breaking the administrative fortresses between cities, which means that the population and economic activities between cities will become more intensive in the future. Constructing and optimizing the ecological security pattern of urban agglomerations is important for promoting harmonious social-economic development and ecological protection. Using the Harbin-Changchun urban agglomeration as a case study, we have identified ecological sources based on the evaluation of ecosystem functions. Based on the resistance surface modified by nighttime light (NTL) data, the potential ecological corridors were identified using the least-cost path method, and key ecological corridors were extracted using the gravity model. By combining 15 ecological sources, 119 corridors, 3 buffer zones, and 77 ecological nodes, the ecological security pattern (ESP) was constructed. The main land-use types composed of ecological sources and corridors are forest land, cultivated land, grassland, and water areas. Some ecological sources are occupied by construction, while unused land has the potential for ecological development. The ecological corridors in the central region are distributed circularly and extend to southeast side in the form of tree branches with the Songhua River as the central axis. Finally, this study proposes an optimizing pattern with "four belts, four zones, one axis, nine corridors, ten clusters and multi-centers" to provide decision makers with spatial strategies with respect to the conflicts between urban development and ecological protection during rapid urbanization.

scholarly journals The Construction of a Regional Ecological Security Pattern Based on Circuit Theory

2019 ◽  
Vol 11 (22) ◽  
pp. 6343 ◽  
Author(s):  
Jiulin Li ◽  
Jiangang Xu ◽  
Jinlong Chu
Keyword(s):  
Ecosystem Services ◽  
Environmental Protection ◽  
Well Being ◽  
Circuit Theory ◽  
Anhui Province ◽  
Ecological Security ◽  
Mountain Area ◽  
Ecological Resources ◽  
Security Pattern ◽  
Regional Ecological Security

The construction of an ecological security pattern (ESP) is one of the basic methods to protect regional ecological security and enhance people’s well-being. In the case of Anhui province, located in the Yangtze River Delta region of China, regional ecological sources were assessed and recognized in terms of ecosystem services, and regional ESP was then constructed based on circuit theory. Current density was applied to analyze the significance of patches and corridors and recognize sticking points, and thereby strategies were introduced to optimize regional ESP. Results of ecosystem services function assessment showed that there were 47 ecological patches, 107 ecological corridors, 16 pinch points, and six sticking points in the ESP of Anhui province. The watershed of the Yangtze and Huai rivers divides the ESP of the northern and southern Anhui, which has huge landscape spatial heterogeneity. Areas with relatively good ecological resources were basically located between Dabie Mountain area in the west and the low hilly area in the south of Anhui, with mostly woodland and farmland as ecological sources. However, cities in the northern Anhui, also in the north of the watershed of the Yangtze and Huai rivers, face severe situations in terms of environmental protection. This study conducted spatial analyses on ESP with different thresholds and proposed to classify different ESPs according to ecological control. This helps to alleviate the contradiction between economic development and environmental protection, and improve the supply capacity of regional ecosystem services, in order to satisfy the regional demand for ecosystem services. Meanwhile, this study offers more methods to construct regional ESP and introduces targeted measures to improve connectivity, which is of practical guidance for the connectivity and optimization of ecological patterns.

scholarly journals Ecological Security Pattern Construction in Beijing-Tianjin-Hebei Region Based on Hotspots of Multiple Ecosystem Services

2022 ◽  
Vol 14 (2) ◽  
pp. 699
Author(s):  
Sheng Wang ◽  
Wenjing Li ◽  
Qing Li ◽  
Jinfeng Wang
Keyword(s):  
Ecosystem Services ◽  
Primary Productivity ◽  
Water Conservation ◽  
Soil Conservation ◽  
Net Primary Productivity ◽  
Ecological Security ◽  
Climate Factors ◽  
Ecological Protection ◽  
Security Pattern ◽  
Temporal And Spatial

The contradiction between urban expansion and ecological protection in the Beijing-Tianjin-Hebei region (BTH) is increasingly acute, which has become one of the main problems restricting regional development, and sustainable development of ecosystem services is the key to increasing human well-being. Based on GIS platform and multiple models, this paper analyzes the temporal and spatial variation characteristics of four key ecosystem services (water conservation, soil conservation, habitat quality, and plant net primary productivity) in different ecological regions of BTH in recent 20 years, quantifies the impact of different climate factors and land use change on ecosystem services (ESs), and discusses the primary ecosystem hotspots and ecological security pattern. The results showed that the interannual variation of water conservation (WC) and plant net primary productivity (NPP) increased from 2000 to 2020, while the change of soil conservation (SC) was not obvious, which was mainly controlled by climate factors, WC and SC were more affected by precipitation, and temperature was the key factor affecting NPP. Habitat quality (HQ) presented a significant downward trend; it was mainly attributed to the deterioration of ecological environment caused by accelerated urbanization expansion. According to hotspot analysis, it could be found that WC was the fastest-growing ecosystem service function in BTH, and NPP would become the factor with the greatest contribution to ecological importance in the future. The important protected areas and main ecological sources of ecological security pattern were mainly distributed in Yanshan-Taihang mountain area, which was consistent with the key areas of ecosystem services. In this study, the temporal and spatial differences of ecosystem service in BTH were demonstrated in a more intuitive way and provided scientific guidance for decision makers to formulate effective ecological protection policies in different regions.

Technical Methodologies for The Assessment of the Impacts of Reclamation Projects on Marine Ecology

2021 ◽  
Author(s):  
Yurong Ouyang ◽  
Lin Wu ◽  
Juanjuan Dai ◽  
Yaojian Wu ◽  
Ling Cai ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Coastal Wetland ◽  
Marine Ecosystems ◽  
Ecological Assessment ◽  
Marine Ecology ◽  
Ecological Security ◽  
Wetland Ecosystems ◽  
Security Pattern ◽  
And Control ◽  
The Impact

Abstract The present article introduces the concept of ecological assessment of reclamation projects. In addition, considering the impact of reclamation projects on marine ecosystems, we built a framework that takes into account structure, function, and ecosystem services for the assessment of the impact of reclamation projects on marine ecology. Moreover, this study explored different technical methods for ecological assessment of reclamation projects, with an emphasis on those that evaluate the impacts of reclamation on the structure of marine ecosystems. The present research provides technical support for the recognition and diagnosis of marine ecology problems that are the result of reclamation projects, introduces a guideline for the development of ecological restoration projects, assists in protecting coastal wetland ecosystems, promotes the scientific and reasonable management and control of reclamation, and helps maintaining the regional marine ecological security pattern.

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