In recent years, there has been an increase in the quantity of marsh ecological asset (MEA) on the Qinghai-Tibetan Plateau due to climatic warming and humidification. However, the alterations in the quality of the MEA in this region remain unclear. Here, we constructed a marsh quality index (MQI) based on the structural (including marsh fractal dimension, FD; and river network density, R_N) and functional (including river runoff, R_r; and Normalized Difference Vegetation Index, NDVI) indices of marshes to assess the change in the quality of MEA between 1980 and 2020 in the pastoral areas of Zoige County. We also examined changes in MEA quantity. And the relationships between the MEA and environmental variables were tested using grey relational analysis. We found that the quantity of MEA experienced an increase of 564.41 km² from 1980 to 2020 in the pastoral areas of Zoige County. This rise was mainly due to the conversion of grassland into marsh. The MQI results demonstrated that there was a steady improvement in the quality of MEA, which was mainly attributed to the increase in R_N, R_r, and NDVI. While the quantity and quality of MEA showed a strong association with climatic factors, their correlation with livestock numbers was found to be weak. These findings suggest that changes in MEA are strongly controlled by climate change and thus nature-based approaches should be highlighted for the conservation and management of MEA in plateau regions.

近年来，由于气候变暖和增湿，青藏高原沼泽生态资产（MEA）数量不断增加。然而，该区域 MEA 质量的变化仍不清楚。在这里，我们基于结构（包括沼泽分形维数，FD；和河网密度，R _N）和功能（包括河流径流，R _r；和归一化植被指数，NDVI）指数构建了沼泽质量指数（MQI）利用沼泽地面积来评估 1980 年至 2020 年若尔盖县牧区 MEA 质量的变化。我们还检查了 MEA 数量的变化。并采用灰色关联分析法检验MEA与环境变量之间的关系。研究发现， 1980年至2020年，若尔盖县牧区MEA数量增加了564.41 km ^{2 。}这一增长主要是由于草原转变为沼泽。MQI结果表明MEA质量稳步提高，这主要归功于R _N、R _r和NDVI的增加。虽然 MEA 的数量和质量与气候因素密切相关，但与牲畜数量的相关性较弱。这些发现表明，MEA 的变化受到气候变化的强烈控制，因此应强调基于自然的方法来保护和管理高原地区的 MEA。