[1]LOU Ni,WANG Zhijie,HE Songtao.Assessment on Ecological Risk of Aha Lake National Wetland Park Based on Landscape Pattern[J].Research of Soil and Water Conservation,2020,27(01):233-239.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 01
Page number:
233-239
Column:
Public date:
2020-02-20
- Title:
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Assessment on Ecological Risk of Aha Lake National Wetland Park Based on Landscape Pattern
- Author(s):
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LOU Ni1, WANG Zhijie2, HE Songtao1
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(1.College of Forestry, Guizhou University, Guiyang 550025, China; 2.College of Life Science, Guizhou University, Guiyang 550025, China)
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- Keywords:
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landscape pattern; landscape ecological risk; spatial autocorrelation; Aha Lake National Wetland Park
- CLC:
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X826
- DOI:
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- Abstract:
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In order to study the ecological risk change of urban wetland parks in karst area and provide the scientific management of the Aha Lake National Wetland Park, three images for 2009, 2013 and 2017 were obtained, an ecological risk assessment model was constructed through landscape pattern index, and spatial correlation were used to analyze the space-time distribution and evolution regularity of the ecological risk in Aha Lake National Wetland Park. The results showed that, in 2009—2017, the main landscape types of Aha Lake National Wetland Park were forestland and water area, the landscape types had changed, the woodland increased by 22.55 hm2, the increment of construction land was larger, and increased by 17.68 hm2, the grassland area decreased by 54.02 hm2; the areas of high risk and higher risk increased by 61.12 hm2 and 112.11 hm2, respectively, mainly concentrated in the southwest and southeast of the study area; the area of the low risk and lower risk and middle risk areas decreased, and the area of the low risk and lower risk areas decreased by 100.73 hm2 and 108.80 hm2, respectively, mainly concentrated in the northwest and east of the study area. Moran’s I values of ecological risk degrees of landscape in each period were 0.352 9,0.498 0,0.480 1, presented a positive spatial correlation and tended to gather in space. Interference of human activity was the main reason contributing to the rise of ecological risk.