Spatiotemporal Dynamics of Constructed Wetland Landscape Patterns during Rapid Urbanization in Chengdu, China

Shiliang Liu (), Yingying Chen, Rongjie Yang, Di Li, Yuling Qiu, Kezhu Lu, Xinhao Cao and Qibing Chen ()
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Shiliang Liu: College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China
Yingying Chen: College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China
Rongjie Yang: College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China
Di Li: College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China
Yuling Qiu: College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China
Kezhu Lu: College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China
Xinhao Cao: College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China
Qibing Chen: College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China

Land, 2024, vol. 13, issue 6, 1-26

Abstract: The degradation of urban ecology, particularly in metropolitan areas distinguished by dense populations and impervious surfaces, presents a worldwide challenge linked to swift urban expansion. Despite extensive documentation of urbanization’s impact on broad regions or specific urban ecosystems over defined time periods, there remains a scarcity of studies investigating the spatiotemporal dynamics of landscape pattern (LP) changes in specific ecosystems at small-to-medium scales within inland megacities as a response to urbanization. Therefore, this work focused on the Bailuwan Wetland Park (BWP) in Chengdu, an inland megacity in southwestern China. Employing satellite imagery data from selected years spanning the previous decade (2010–2021, encompassing 2010, 2012, 2015, 2018, and 2021), this investigation delved into the influences of urbanization on the LP over various time-frames and across different land use/land cover (LULC) types. Our study revealed that urbanization has a significant impact on the patch-/landscape-level characteristics, including the class area (CA), number of patches (NP), patch density (PD), percentage of landscape (PLAND), aggregation index (AI), contagion index (CONTAG), largest patch index (LPI), landscape shape index (LSI), fractal dimension index (FRAC_MN), Shannon’s diversity (SHDI), and evenness index (SHEI). Over the period from 2010 to 2021, NP and PD experienced notable increases, while landscape shape (LSI/FRAC_MN) exhibited greater complexity and fragmentation (PLAND) intensified. Further, landscape heterogeneity (AI/CONTAG) and diversity (SHDI/SHEI) decreased. Particularly significant was the conversion of 52 ha of agricultural land to vegetation, resulting in heightened complexity and fragmentation in vegetation patterns. Additionally, the CA of lakes and rivers decreased following the establishment of the park, while the CA and NP of bare land presented significant increases. These findings suggest that rapid urbanization significantly influences the spatial–temporal dynamics of wetland landscape patterns. Consequently, it is imperative for society to prioritize the restoration and protection of urban constructed wetlands.

Keywords: landscape pattern; urban constructed wetland; urbanization stages; inland megacity; spatiotemporal dynamics (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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