Research on Urban Ecological Network Under the Threat of Road Networks—A Case Study of Wuhan

Zhang, Miao; Pan, Lei; Wang, Qiaozhi; Chen, Pei; Yan, Cheng; Liu, Likun

doi:10.3390/ijgi8080342

Cited by 49 publications

(20 citation statements)

References 11 publications

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“…The core area, which plays a key role in the level of ecological network connectivity, has a large scale, with an area of 7177 km 2 , accounting for 16.70% of the total area of the foreground land category. Compared with other related studies [ 65 , 74 ], the core area is relatively small, most likely because of the specific natural geographical conditions of Chongqing, with a more fragmented landscape and a smaller core area. However, the bridge area of Chongqing is larger than that in other cities, which is more conducive to the construction of ecological corridors.…”

Section: Resultsmentioning

confidence: 85%

Identifying Ecological Corridors and Networks in Mountainous Areas

Zhou

Song

2021

IJERPH

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Since the 1950s, human activities have been driving economic development and land changes, hindering the conservation of biological habitats and landscape connectivity. Constructing ecological networks is an effective means to avoid habitat destruction and fragmentation. Mountain areas are hotspots of biological habitats and biodiversity; however, the pace of urbanization in mountain areas is also accelerating. To protect an ecosystem more effectively, it is necessary to identify ecological corridors and ecological networks. Therefore, based on the Minimal Cumulative Resistance model and taking Chongqing in China as an example, the identification of potential ecological corridors and the construction of an ecological network in Chongqing were realized using the Linkage Mapper software. The results were as follows: (1) From 2005 to 2015, the patch area of cultivated land and grassland in Chongqing decreased by 0.08% and 1.46%, respectively, while that of built-up areas increased by 1.5%. The fragmentation degree of cultivated land was higher, and the internal connectivity of forestry areas was worse. (2) In total, 24 ecological sources were selected, and 87 potential ecological corridors and 35 ecological nodes were generated using the Morphological Spatial Pattern Analysis and the Conefor2.6 software. The total length of the ecological network in Chongqing is 2524.34 km, with an average corridor length of 29.02 km. (3) The overall complexity and network efficiency are high, but the spatial distribution of ecological corridors is uneven, especially in the southwest of Chongqing.

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Section: Resultsmentioning

confidence: 85%

Identifying Ecological Corridors and Networks in Mountainous Areas

Zhou

Song

2021

IJERPH

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“…The main nocturnal species in the study area include Bufo gargarizans, Fejervarya multistriata, Myotis chinensis, Rhinolophus sinicus, and some Strigiformes species, such as the Collared Owl and Red Horned Owl. As a result of rapid urbanization in recent decades, the natural habitats have shrunk and become fragmented, and anthropization is one of the main risk factors that threatens the landscape connectivity and biodiversity [39].…”

Section: Study Areamentioning

confidence: 99%

Ecological Corridor Construction Based on Least-Cost Modeling Using Visible Infrared Imaging Radiometer Suite (VIIRS) Nighttime Light Data and Normalized Difference Vegetation Index

Liu

Fang

2021

Land

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Anthropic pressure is one of the main drivers of landscape change and biodiversity loss. Artificial nighttime light, which can affect species behavior, is an important human-induced threat to biodiversity, but it is often ignored in ecological connectivity research. To mitigate the adverse impacts of artificial lighting on biodiversity, this study integrates artificial nighttime light in landscape ecology and analyzes the influence of artificial nighttime light on landscape connectivity. A quantitative approach integrating nighttime light brightness from a Visible Infrared Imaging Radiometer Suite (VIIRS) with a normalized difference vegetation index (NDVI) from a Moderate-resolution Imaging Spectroradiometer (MODIS) is proposed to estimate the matrix resistance, which can identify the sensitive areas that are disrupted by nighttime light. It was found that the nightscape in the study area is significantly disrupted by nighttime light and the matrix resistance in the center of the study area significantly increases. Compared to the least-cost routes from the NDVI, the “dark” least-cost ecological corridors constructed using our approach apparently change in both location and distance. The corridors moved to the outer suburbs and rural areas, and the maximum increase in distance of the least-cost paths was 37.94%. Due to less disturbance from human activity and the maintenance of a pristine nightscape, “dark” ecological corridors can reduce the adverse effects of night lights and contribute to biodiversity. However, natural habitats have been greatly affected by nighttime light with the increase in global illumination, and it is essential that we improve public awareness of light pollution and formulate light-reduction policies and legislation.

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“…We divided land use into six categories of 12 types ( Figure 2): water (4), built-up land (5), unused land (6), grassland (11,12), forest land (21)(22)(23)(24), and cropland (31)(32)(33). The water and cropland were the main types of landscapes in Wuhan.…”

Section: Data Processingmentioning

confidence: 99%

“…The water and cropland were the main types of landscapes in Wuhan. The cropland was concentrated on the periphery of the central area, of which the paddy cropland was 1.8 times the dry cropland [22]. The land use water was evenly distributed and had a high density, accounting for 1/5 of the city.…”

Section: Data Processingmentioning

confidence: 99%

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Urban Ecological Corridor Network Construction: An Integration of the Least Cost Path Model and the InVEST Model

Tang

Chi

2020

IJGI

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Under the background of urban expansion, ecological protection cannot be delayed. The construction of ecological networks is of considerable significance to ecosystem services. However, in the process of constructing a corridor network, there is no uniform standard for the selection of ecological sources and the determination of cost factors. The InVEST model is an effective complement to ecosystem service assessment for sensitively measuring external threats and their threat intensity. Therefore, taking Wuhan as an example, we combined InVEST and the least cost path model (LCP) to construct a multi-target corridor network with comprehensive cost factors for birds and small terrestrial mammals. The results showed that: (1) The InVEST model provided a reliable basis for ecological source screening by demonstrating the distribution of habitat quality. (2) The corridor with a length of 12–25 km presented a “U” shape, and the impact of urbanization on small terrestrial mammals was more significant than that of birds. (3) The integrated network pattern proposed by the “point-line-plane” principle would provide a reference for urban ecological construction and sustainable development.

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Research on Urban Ecological Network Under the Threat of Road Networks—A Case Study of Wuhan

Cited by 49 publications

References 11 publications

Identifying Ecological Corridors and Networks in Mountainous Areas

Identifying Ecological Corridors and Networks in Mountainous Areas

Ecological Corridor Construction Based on Least-Cost Modeling Using Visible Infrared Imaging Radiometer Suite (VIIRS) Nighttime Light Data and Normalized Difference Vegetation Index

Urban Ecological Corridor Network Construction: An Integration of the Least Cost Path Model and the InVEST Model

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