Landscape ecological security pattern associated with the introduction of exotic tree speciesEucalyptus

2013 ◽  
Vol 33 (6) ◽  
pp. 1860-1871
Author(s):  
赵筱青 ZHAO Xiaoqing ◽  
和春兰 HE Chunlan
Keyword(s):  
Ecological Security ◽  
Exotic Tree ◽  
Security Pattern ◽  
Landscape Ecological ◽  
Landscape Ecological Security

scholarly journals Analysis of ecological security pattern of rare earth mining areas in South China based on MCR model

2021 ◽  
Vol 3 (1) ◽  
Author(s):  
Hengkai Li ◽  
Yuting Liu ◽  
Qin Li ◽  
Xiuli Wang
Keyword(s):  
Rare Earth ◽  
South China ◽  
Source Area ◽  
Local Area ◽  
Mining Area ◽  
Ecological Security ◽  
Security Pattern ◽  
Landscape Ecological ◽  
Landscape Ecological Security ◽  
The Rare Earth

The rare earth mining area in South China is the main production base of ionic rare earth in the world, which has brought inestimable economic value to the local area and even the whole nation. However, due to the lack of mining technology and excessive pursuit for economic profits, a series of environmental problems have arisen, which is a great threat to the ecosystem of the mining area. Taking Lingbei rare earth mining area in Ganzhou as an example, this paper discriminated and analyzed such aspects as the ecological source, ecological corridor and ecological nodes of the mining area based on the landscape ecological security pattern theory and the minimum cumulative resistance model (MCR) method, and constructed a landscape ecological security pattern of the mining area during the 2009, 2013 and 2018. The results show that: i) The patch area of the ecological source of rare earth mining area is small, mainly concentrated in the east and west sides of the mining area. ii) During the selected year, the ecological source area, ecological corridors, radiation channels and the number of ecological nodes in the rare earth mining area are increasing, indicating that the landscape ecological security of the rare earth mining area has been improved to some extent, but it remains necessary for relevant departments to make a optimized planning to further reconstruct the ecological security pattern of the rare earth mining area.

Landscape ecological security pattern optimization based on the granularity inverse method: a case study in Xiuying District, Haikou

2015 ◽  
Vol 35 (19) ◽  
Author(s):  
陆禹 LU Yu ◽  
佘济云 SHE Jiyun ◽  
陈彩虹 CHEN Caihong ◽  
佘宇晨 SHE Yuchen ◽  
罗改改 LUO Gaigai
Keyword(s):  
Inverse Method ◽  
Ecological Security ◽  
Security Pattern ◽  
Landscape Ecological ◽  
Landscape Ecological Security

Study of urban lake landscape ecological security pattern evolution in Wuhan, 1995-2015

2019 ◽  
Vol 39 (5) ◽  
Author(s):  
陈昆仑 CHEN Kunlun ◽  
齐漫 QI Man ◽  
王旭 WANG Xu ◽  
黄耿志 HUANG Gengzhi
Keyword(s):  
Ecological Security ◽  
Urban Lake ◽  
Security Pattern ◽  
Landscape Ecological ◽  
Landscape Ecological Security

scholarly journals Landscape change patterns at three stages of the construction and operation of the TGP

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ruikang Li ◽  
Yangbing Li ◽  
Bo Li ◽  
Dianji Fu
Keyword(s):  
Landscape Pattern ◽  
Landscape Change ◽  
Ecological Security ◽  
Three Gorges ◽  
Temporal Characteristics ◽  
Landscape Type ◽  
The Three Gorges ◽  
Landscape Types ◽  
Landscape Ecological ◽  
Landscape Ecological Security

AbstractAnalyses of landscape change patterns that are based on elevation and slope can not only provide reasonable interpretations of landscape patterns but can also help to reveal evolutionary laws. However, landscape change patterns and their model in different landforms of the typical watershed in the Three Gorges Reservoir Area (TGRA) has not been quantified and assessed effectively. As a complex geographical unit, the ecological environment in the middle reach of the Yangtze River has experienced great changes due to the construction of the Three Gorges Project (TGP) and its associated human activities. Here, based mainly on a digital elevation model (DEM) and remotely sensed images from 1986, 2000, 2010, and 2017 and by using GIS technology, speeds/ trends of landscape change, the index of landscape type change intensity, landscape pattern indices, and landscape ecological security index, the spatial and temporal evolution characteristics of different elevations, slopes, and buffer landscape types were analyzed in typical watersheds, as well as an evolutionary model of the landscape pattern. The results indicated that (1) the landscape types along with the land classification and buffer zone that were influenced by the TGR construction have undergone a phased change, with the period 2000–2010 being the most dramatic period of landscape evolution during the impoundment period; (2) landscape type shifts from human-dominated farmland to nature-driven forestland and shrub-land as elevations, slopes and buffer distances increased. The landscape has shifted from diversity to relative homogeneity; (3) land types and buffer zones played essential roles in the landscape pattern index, which is reflected in the differences in landscape type indices for spatial extension and temporal characteristics. The results of this paper illustrate the spatial–temporal characteristics of various landscape types at three distinct stages in the construction of the TGR. These findings indicate that the landscape ecological security of the watershed is improving year by year. The follow-up development of the TGRA needs to consider the landscape change patterns of different landforms.

scholarly journals The Construction of Ecological Security Patterns in Coastal Areas Based on Landscape Ecological Risk Assessment—A Case Study of Jiaodong Peninsula, China

2021 ◽  
Vol 18 (22) ◽  
pp. 12249
Author(s):  
Yichen Yan ◽  
Hongrun Ju ◽  
Shengrui Zhang ◽  
Guokun Chen
Keyword(s):  
Ecological Risk ◽  
Principal Component ◽  
Coastal Areas ◽  
Ecological Security ◽  
Ecological Planning ◽  
Land Utilization ◽  
The North ◽  
Jiaodong Peninsula ◽  
Security Pattern ◽  
Landscape Ecological

Increasing land utilization, population aggregation and strong land–sea interaction make coastal areas an ecologically fragile environment. The construction of an ecological security pattern is important for maintaining the function of the coastal ecosystem. This paper takes Jiaodong Peninsula in China, a hilly coastal area, as an example for evaluating landscape ecological risk within a comprehensive framework of “nature–neighborhood–landscape”, based on spatial principal component analysis, and it constructs the ecological security pattern based on the minimum cumulative resistance model (MCR). The results showed that the overall level of ecological risk in the study area was medium. The connectivity between the areas of low landscape ecological risk was relatively low, and the high risk areas were concentrated in the north of the Peninsula. A total of 11 key ecological corridors of three types (water, green space and road corridors) and 105 potential corridors were constructed. According to the ecological network pattern, landscape ecological optimization suggestions were proposed: key corridors in the north and south of Jiaodong Peninsula should be connected; urban development should consider current ecological sources and corridors to prevent landscape fragmentation; and the ecological roles of potential corridors should be strengthened. This paper can provide a theoretical and practical basis for ecological planning and urban master planning in coastal areas in the future.

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