|Table of Contents|

Landscape Ecological Risk Assessment in Guangling District ofYangzhou City Based on Land Use Change(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2019年01期
Page:
139-
Research Field:
·地理学·
Publishing date:

Info

Title:
Landscape Ecological Risk Assessment in Guangling District ofYangzhou City Based on Land Use Change
Author(s):
He Shasha1; 2; Li Xin1; 3; He Chunlong4; Fang Bin1; 3
(1.School of Geography,Nanjing Normal University,Nanjing 210023,China)(2.College of Environment and Planning,Henan University,Kaifeng 475004,China)(3.New-Type Urbanization and Rural Land Issues Research Center,Nanjing Normal University,Nanjing 210023,Ch
Keywords:
land use; landscape pattern; ecological risk; Guangling District
PACS:
X826
DOI:
10.3969/j.issn.1001-4616.2019.01.021
Abstract:
Based on land use data,combined with ArcGIS and Fragstats4.2 to calculate various landscape indices,the spatial pattern and process characteristics of landscape ecological risk in Guangling District from 2010 to 2015 are analyzed,which lay a solid foundation for the formulation of ecological risk management and control measures.The results show that:(1)From 2010 to 2015,the landscape pattern of Guangling District has changed significantly. The area of grassland,woodland,cultivated land and water has decreased significantly,and the expansion of construction land is obvious. The expansion area mainly comes from the transformation of cultivated land and water area. From 2010 to 2015,landscape fragmentation in Guangling District showed a decreasing trend as a whole. During this period,the degree of separation of the study area also decreased significantly,and the fractal dimension changed little as a whole. The fractal dimension of cultivated land was the highest and that of other land was the smallest.(2)Landscape ecological risk level tends to decrease gradually,the area of moderate risk area has decreased significantly,while the area of mild risk area has increased,and the area of high risk area has decreased significantly.(3)From the spatial distribution analysis,the overall risk type distribution in Guangling District tends to increase from the west to the east. The types of higher risk areas are mainly distributed in rural areas such as Shiqiao Town,Shatou Town and Touqiao Town. The main landscape types in this area are cultivated land,which is easily disturbed by human activities. The types of mild risk areas are mainly distributed in the rural areas around Tangwang Township and Hangji Town in the northwest. The types of slight risk levels are mostly in Guangling District,and the main landscape type is construction land. It has strong anti-interference ability and lowest risk value.Based on the ecological risk assessment of different land use changes,it is of great significance to establish the ecological risk early warning mechanism,reduce the ecological risk and maintain the regional ecosystem service function.

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Last Update: 2019-03-30