水生态学杂志2025，Vol.46Issue(5)：50-62,13.DOI:10.15928/j.1674-3075.202411280001
基于景观格局的洛阳江河口人工红树林湿地生态风险评价
Ecological Risk Assessment of an Artificial Mangrove Wetland in Luoyang River Estuary Based on Landscape Pattern
摘要
Abstract
Mangrove wetlands are an important part of coastal ecosystems and are crucial for maintain-ing ecological stability.Luoyang River wetland is a representative subtropical estuarine wetland,rich in marine biological resources,as well as rare and endangered species.In this study,Luoyang River wetland was selected for research,and we explored the spatiotemporal distribution of land use in the wetland and assessed the ecological risk status of the mangrove ecosystem.The study was based on Landsat 8 satellite imagery data for Luoyang River wetland in 2016,2020 and 2024,and four land use types were identified using the Google Earth Engine(GEE):mangrove,salt marsh(area of Spartina alterniflora),bare tidal flats,and water.Based on the distribution of landscape types,landscape metrics were calculated using Fragstats 4.2,and the results were integrated to derive the landscape ecological risk index.The aim of the study was to provide visual analysis and a basis for decision-making on mangrove wetland risk control,mangrove landscape optimization,coastal sustainable development and ecological civilization construc-tion.Results show:(1)From 2016 to 2024,the mangrove area of the Luoyang River wetland continuously increased,with an increase of 0.99 km2(2.34 km2 to 3.33 km2),the salt marsh area initially increased and then decreased,and the areas of tidal flats and water was unchanged.(2)The ecological risk index(ERI),from west to east,alternated from high to low and back to high.High/medium risk areas were concentrat-ed in the western and peripheral zones,and low risk areas were dominated by well-preserved mangrove forests in the eastern region,with less Spartina alterniflora invasion and encircled by high-risk zones.In general,the ecological risk in the study area fluctuated but remained mostly stable,with most regions classified as ecologically stable.(3)The landscape ecological risk in the Luoyang River wetland was primarily characterized by low and moderate risk in 2016,shifted to moderate and high risk in 2020,and showed significant improvement by 2024.The variation in landscape ecological risk within the Luoyang River wetland ecosystem was attributed to a combination of natural and anthropogenic factors.In 2020,the expansion of Spartina alterniflora elevated landscape ecological risk in the mangrove ecosystem.However,recent data indicates a decline in landscape ecological risk in the Luoyang River wetland,reflect-ing measurable improvements in the mangrove ecosystem health.关键词
景观格局/生态风险评估/土地利用变化/洛阳江河口湿地/红树林Key words
landscape pattern/ecological risk assessment/land use change/Luoyang River estuarine wetland/mangrove分类
资源环境引用本文复制引用
林伟,李诗华,韦旭,苏颖,曾吉雨..基于景观格局的洛阳江河口人工红树林湿地生态风险评价[J].水生态学杂志,2025,46(5):50-62,13.基金项目
国家自然科学基金青年项目(42401110) （42401110）
自然资源部海洋空间资源管理技术重点实验室开放基金课题(KF-2024-108). （KF-2024-108）
