What question did this study set out to answer?

This study aims to evaluate natural landscape quality (NLQ) and conservation effectiveness in national parks, focusing on Sanjiangyuan National Park.

June 19, 2026自然资源学报Open Access

Evaluation of natural landscape quality and conservation effectiveness in national parks: A case study of Sanjiangyuan National Park

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Randomized trial evaluates natural landscape quality in national parks, indicating conservation effectiveness.

This study aims to evaluate natural landscape quality (NLQ) and conservation effectiveness in national parks, focusing on Sanjiangyuan National Park.
Constructed an NLQ evaluation index system based on integrity, originality, and uniqueness.
Employed a counterfactual assessment model using propensity score matching to compare NLQ in 2016 and 2023.
Analyzed changes in landscape indices in the core protection area and buffer zones.
NLQ index increased during the study period; core protection area saw significant growth, while general control area saw less growth.
Landscape integrity index of the core protection area decreased slightly by 2023.
Pilot national park system improved NLQ overall, but conservation effectiveness varied across regulatory zones.

TAO et al. (2026) studied this question.

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