From pursuing quantity to pursuing quality: exploring the coupling coordination and influencing factors of high-quality tourism development and ecosystem service value in the Pearl River Delta urban agglomeration of China.

Front Public Health · 2025 · PMC12723695 · PMID 41446524

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an overall trendno p-value reported

As shown in the Figure 7 , the mean value of the CCD primarily fluctuated between 0.39 and 0.49 during the study period, exhibiting an overall trend of a slow increase followed by a decline.

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a decreasing trendno p-value reported

By calculating the ESV of the PRD region, we found that its ecosystem service value showed a decreasing trend from 2011 to 2022.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.