scholarly journals The Ecological Security Pattern and Its Constraint on Urban Expansion of a Black Soil Farming Area in Northeast China

2017 ◽  
Vol 6 (9) ◽  
pp. 263 ◽  
Author(s):  
◽  
◽  
◽  
◽  
◽  
...  
Keyword(s):  
Northeast China ◽  
Urban Expansion ◽  
Black Soil ◽  
Ecological Security ◽  
Farming Area ◽  
Security Pattern

scholarly journals Elevated Risk of Ecological Land and Underlying Factors Associated with Rapid Urbanization and Overprotected Agriculture in Northeast China

2019 ◽  
Vol 11 (22) ◽  
pp. 6203 ◽  
Author(s):  
Shuhan Liu ◽  
Dongyan Wang ◽  
Guoping Lei ◽  
Hong Li ◽  
Wenbo Li
Keyword(s):  
Land Use ◽  
Urban Expansion ◽  
Black Soil ◽  
Residential Area ◽  
Risk Level ◽  
Ecological Value ◽  
Urbanization Process ◽  
Rapid Urbanization ◽  
Important Indicator ◽  
Farming Area

Ecological land with considerable ecological value can be regarded as an important indicator in guaranteeing ecosystem function and sustainable development. Generally, the urbanization process has been considered to be the primary factor affecting ecological land use. However, the influence of agricultural development, particularly in a typical farming area, has rarely been studied. In this paper, we present a method to assess the ecological risk of ecological land (ELER) in a black soil area in northeastern China. Furthermore, the underlying factors were detected using the geographically weighted regression model, which took into account conditions of natural elements, the urbanization process, and grain production conditions. The results indicate that ecological land experienced remarkable changes with an evident loss and decline from 1996–2015. The ELER progressively increased in the concentrated farming area and the western agro-pastoral ecotone, and the ecological land in the eastern forest area was always at a high risk level. According to the regression coefficients, the relationships between influence factors and ELER could be better explained by the variables of elevation, slope, proportion of rural residential area, and ratio of cultivated land area to residential area. To summarize, agricultural occupation and urban expansion were verified as the two main causes of ecological land loss, as well as elevated risks. In light of the current situation, measures such as policy adjustment and ecological restoration should be taken to avoid risk and optimize land use.

scholarly journals Ecological Land Fragmentation Evaluation and Dynamic Change of a Typical Black Soil Farming Area in Northeast China

2017 ◽  
Vol 9 (2) ◽  
pp. 300 ◽  
Author(s):  
Shuhan Liu ◽  
Dongyan Wang ◽  
Hong Li ◽  
Wenbo Li ◽  
Qing Wang
Keyword(s):  
Northeast China ◽  
Dynamic Change ◽  
Black Soil ◽  
Land Fragmentation ◽  
Farming Area

scholarly journals Simulating Urban Expansion Based on Ecological Security Pattern—A Case Study of Hangzhou, China

2021 ◽  
Vol 19 (1) ◽  
pp. 301
Author(s):  
Xiaochang Yang ◽  
Sinan Li ◽  
Congmou Zhu ◽  
Baiyu Dong ◽  
Hongwei Xu
Keyword(s):  
Urban Expansion ◽  
Source Area ◽  
Mountainous Area ◽  
Annual Growth Rate ◽  
Ecological Security ◽  
Construction Land ◽  
The North ◽  
Natural Development ◽  
Security Pattern ◽  
The Impact

Disordered urban expansion has encroached on a large amount of ecological land, resulting in the steady degradation of urban ecology, which has an adverse effect on the sustainable development of the region. An ecological security pattern can effectively control urban expansion, and it is of great significance to balance urban development and ecological protection. In order to analyze the impact of ecological security patterns on urban expansion, Hangzhou was taken as an example, the CA-Markov model and FLUS model were used to simulate the urban expansion pattern in 2030 under the natural development scenario and the ecological security scenario. The results showed that (1) the ecological source area in the study area is 630.90 km2 and was mainly distributed in the western mountainous area. There are 14 ecological corridors, primarily composed of valleys and rivers. Ecological nodes are mainly distributed on the north and south sides of the main urban area. (2) From 2000 to 2018, the annual increase index (AI) of construction land decreased in the northeast and southeast directions but increased in the northwest and southwest directions, and in the northeast direction the value was always the highest. Except for the southwest direction, the average annual growth rate (AGR) of construction land in the other directions decreased. At a distance from the city center of 30 km, AI was relatively higher and was increasing, while AGR was declining. At a distance of 30–45 km, both AI and AGR were increasing, indicating that the focus of construction land was moving outwards. (3) From 2018 to 2030, under both natural development scenario and ecological security scenario, construction land would keep expanding, but the construction land area, proportion, AI, and AGR of the latter would both be smaller than the former, indicating that the ecological security pattern can effectively curb urban expansion. Because of a large amount area of ecological sources, the expansion of construction land in the southwest direction would be constrained, especially under the ecological security scenario. The methods and results of this study can provide theoretical and application references for urban planning and green development in metropolises.

scholarly journals Optimization of the Method of Constructing Ecological Security Pattern with Rapid Urban Expansion

2021 ◽  
Vol 299 ◽  
pp. 02016
Author(s):  
Ke Li ◽  
Tiantian Yu ◽  
Ji Li ◽  
Chengling Cui ◽  
Song Wu
Keyword(s):  
Urban Areas ◽  
Urban Expansion ◽  
Principal Component ◽  
Human Interaction ◽  
Ecological Security ◽  
Ecological Corridors ◽  
Ecological Protection ◽  
Ecological Corridor ◽  
Edge Betweenness ◽  
Security Pattern

The contradiction between urban development and ecological environment protection is particularly obvious in rapidly expanding urban areas. It is necessary to build a reasonable urban ecological security pattern. to balance urban expansion and ecological security. This paper takes Zhengzhou as an example, based on spatial principal component analysis, a comprehensive assessment of urban ecological security is carried out by using natural characteristics, human characteristics, and natural and human interaction characteristics, and ecological sources are extracted; Based on the ecological corridors extracted by the minimal cumulative resistance (MCR) model, the edge-betweenness index is used to optimize the model, and redundant corridors are eliminated, the first-level ecological corridors and ecological nodes on the first-level ecological corridor are extracted. Through experiments, 25 important ecological sources, 24 first-level ecological corridors, and 32 ecological nodes were extracted. Important ecological sources, first-level ecological corridors and ecological nodes constitute the basic ecological security pattern of Zhengzhou, which effectively alleviate the contradiction between rapid urban expansion and ecological protection, and ensuring urban ecological security at the same time.

Construction of ecological security pattern in Northeast China based on MCR model

2021 ◽  
Vol 41 (1) ◽  
Author(s):  
于成龙，刘丹，冯锐，唐权，郭春玲 YU Chenglong
Keyword(s):  
Northeast China ◽  
Ecological Security ◽  
Security Pattern ◽  
Mcr Model

scholarly journals A Quantitative Analysis of Factors Influencing Organic Matter Concentration in the Topsoil of Black Soil in Northeast China Based on Spatial Heterogeneous Patterns

2021 ◽  
Vol 10 (5) ◽  
pp. 348
Author(s):  
Zhenbo Du ◽  
Bingbo Gao ◽  
Cong Ou ◽  
Zhenrong Du ◽  
Jianyu Yang ◽  
...  
Keyword(s):  
Land Use ◽  
Organic Matter ◽  
Soil Erosion ◽  
Soil Type ◽  
Northeast China ◽  
Black Soil ◽  
Factors Affecting ◽  
Soil Zone ◽  
Rainfed Farming ◽  
Study Results

Black soil is fertile, abundant with organic matter (OM) and is exceptional for farming. The black soil zone in northeast China is the third-largest black soil zone globally and produces a quarter of China’s commodity grain. However, the soil organic matter (SOM) in this zone is declining, and the quality of cultivated land is falling off rapidly due to overexploitation and unsustainable management practices. To help develop an integrated protection strategy for black soil, this study aimed to identify the primary factors contributing to SOM degradation. The geographic detector, which can detect both linear and nonlinear relationships and the interactions based on spatial heterogeneous patterns, was used to quantitatively analyze the natural and anthropogenic factors affecting SOM concentration in northeast China. In descending order, the nine factors affecting SOM are temperature, gross domestic product (GDP), elevation, population, soil type, precipitation, soil erosion, land use, and geomorphology. The influence of all factors is significant, and the interaction of any two factors enhances their impact. The SOM concentration decreases with increased temperature, population, soil erosion, elevation and terrain undulation. SOM rises with increased precipitation, initially decreases with increasing GDP but then increases, and varies by soil type and land use. Conclusions about detailed impacts are presented in this paper. For example, wind erosion has a more significant effect than water erosion, and irrigated land has a lower SOM content than dry land. Based on the study results, protection measures, including conservation tillage, farmland shelterbelts, cross-slope ridges, terraces, and rainfed farming are recommended. The conversion of high-quality farmland to non-farm uses should be prohibited.

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.

Sign in / Sign up

Export Citation Format

Share Document