From 1990 to 2020, FEL and WEL showed an increasing trend first and then a decreasing trend, while OEL showed a decreasing trend.
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Dynamic simulation of landscape ecological security and analysis of coupling coordination degree: A case study of Bole.
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The sentences
The average landscape ecological risk value in Bole has been decreasing from 1990 to 2020, indicating a positive trend towards regional security and gradual improvement in landscape ecological security.