[1]WANG Licheng,WEN Zhongming,LU Jinxin.Relationship Between Vegetation Landscape Pattern and Hydrological Connectivity in Yanhe River Basin[J].Research of Soil and Water Conservation,2022,29(05):124-130.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 05
Page number:
124-130
Column:
Public date:
2022-08-20
- Title:
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Relationship Between Vegetation Landscape Pattern and Hydrological Connectivity in Yanhe River Basin
- Author(s):
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WANG Licheng1,2, WEN Zhongming1,2,3, LU Jinxin3
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(1.Institute of Soil and Water Conservation, CAS & MWR, Yangling, Shaanxi 712100, China; 2.University of Chinese Academy of Sciences,Beijing 100049,China; 3.College of Grassland Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China)
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- Keywords:
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hydrological connectivity; vegetation landscape pattern; spatial autocorrelation; spatial autoregression
- CLC:
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P332.5
- DOI:
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- Abstract:
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In order to explore the impact of vegetation landscape pattern on hydrological connectivity in the Yanhe River Basin, based on the land use classification results and the spatial distribution of hydrological connectivity index, the pattern characteristics of vegetation landscape and hydrological connectivity in the Yanhe River Basin were discussed. Based on the spatial autocorrelation theory, the spatial correlation between landscape pattern of forest and grass vegetation and hydrological connectivity was explored with the help of GeoDA software platform. The results show that:(1)the spatial distribution of forest-grassland landscape and hydrological connectivity has significant spatial autocorrelation in steppe, forest steppe and forest zones of Yanhe River Basin; the mean patch area, aggregation index and percentage of landscape of forestland in the three zones showed significant statistical and spatial positive correlation with hydrological connectivity; landscape division index and splitting index showed significant statistical and spatial negative correlation with hydrological connectivity;(2)the increase of dominance degree and aggregation degree of forestland landscape does not lead to the decrease of hydrological connectivity, but the increase of patch fragmentation can lead to the decrease of hydrological connectivity; for the grassland landscape of the three zones, its performance is completely opposite to that of forestland; increasing the area of grassland landscape, improving the dominance of grassland vegetation, and continuously concentrating grassland patches can reduce the hydrological connectivity;(3)among the spatial regression models exploring the correlation between hydrological connectivity and vegetation landscape pattern, the fitting effects of spatial lag model and spatial error model are far better than that of ordinary linear regression model. In conclusion, the spatial lag model has a stronger ability to explain the spatial relationship between vegetation landscape pattern and hydrological connectivity. The research results can provide the effective references for the design and planning of the vegetation landscape pattern in the Yanhe River Basin.