Details

Autor(en) / Beteiligte

• Liu, Yina
• Kong, Lingqiao
• Xiao, Yi
• Zheng, Hua

Titel

Relationships between landscape pattern and ecosystem water purification service in the Yangtze River Basin

Ist Teil von

• Sheng tai xue bao, 2019-01, Vol.39 (3), p.844

Ort / Verlag

Beijing: Science Press

Erscheinungsjahr

2019

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Landscape patterns can affect pollutant discharge into rivers by influencing ecological processes,and further affect water purification service of ecosystems in the watershed. It is of great significance for landscape planning,ecosystem protection,and ecosystem services promotion to explore the relationships between landscape patterns and ecosystem water purification service. The landscape pattern characteristics were analyzed and ecosystem water purification service was assessed by using InVEST( Integrated Valuation of Ecosystem Services and Tradeoffs) model in 45 sub-basins of the Yangtze River Basin. Then the relationships between landscape patterns and ecosystem water purification service were identified. For the landscape composition,the proportions of farmland and urban areas were logarithmically correlated with ecosystem water purification service( P < 0.01),whereas the proportion of forest area was positively correlated with it( P <0.01). For the landscape configuration,water purification service was negatively correlated with patch density and landscape fragmentation,and positively correlated with the average patch area and shape( P < 0.01). For the patch-type,average patch area of forest/shrub and the average patch shape of shrub and wetland were positively correlated with ecosystem water purification service,while the average patch area and edge density of farmland and urban patch density were negatively correlated with water purification service( P < 0.01). Only landscape fragmentation and the ecosystem water purification service was negatively correlated in the forest-dominated sub-basin( P < 0.01). In the farmland-dominated subbasin,ecosystem water purification services were positively correlated with landscape aggregation and Shannon diversity indexes( P < 0.01). The above results can provide management information for the promotion of ecosystem services in the Yangtze River basin. At the landscape scale of the basin,increasing the area proportion of forest,controlling the farmland and urban area proportions,reducing the landscape fragmentation,and increasing the complexity of the average patch shape would be helpful for the improvement of ecosystem water purification service. At the patch-type level,increasing the area of the shrub patch and the shape complexity of the shrub and wetland patches,and reducing the edge density of urban and the patch density of farmland would also contribute to the promotion of ecosystem water purification service. In the forestdominated sub-basins,landscape fragmentation should be prevented,while the diversity and aggregation of different types of patches should be increased in the farmland-dominated sub-basins. The information can also provide important for the management of ecosystem water purification service in other basins.