Quantifying the impacts of human activities on ecosystem services is crucial for promoting sustainable development of land resources and ecosystems. Therefore, taking an ecological resettlement village as a case study, we assessed human appropriation of net primary production (HANPP) and soil retention service (SRS) under different resettlement scenarios from 2014 to 2050. Moreover, we incorporated HANPP into the estimation of SRS to quantify its impact. Additionally, we analyzed the impact of HANPP and climate factors on SRS using generalized additive models and piecewise linear regression to explore the sustainable threshold at which HANPP influences SRS. The results revealed that, following resettlement from 2014 to 2050, both HANPP and soil loss caused by HANPP exhibited increasing trends, while SRS showed a declining trend. Among the three resettlement scenarios, the natural grassland scenario exhibited the highest HANPP, the highest soil loss caused by HANPP, and the lowest SRS. When the HANPP rate exceeded 38.9 %, its impact on SRS surpassed that of climatic factors, becoming the dominant factor influencing SRS. Furthermore, the decline in SRS accelerated significantly with further increases in HANPP, suggesting a sustainable threshold. This research advances understanding of the impacts of human activities on ecosystem services and has significant implications for the sustainable development of land resources and ecosystems.

中文翻译：

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人类占有净初级生产对土壤保持服务的影响——以青藏高原生态移民村为例

量化人类活动对生态系统服务的影响对于促进土地资源和生态系统的可持续发展至关重要。因此，以生态移民村为例，评估了 2014—2050 年不同移民安置情景下人类对净初级生产力 （HANPP） 和土壤保持服务 （SRS） 的占用。此外，我们将 HANPP 纳入 SRS 的估计中，以量化其影响。此外，我们使用广义加法模型和分段线性回归分析了 HANPP 和气候因素对 SRS 的影响，以探索 HANPP 影响 SRS 的可持续阈值。结果表明：2014—2050 年移民后，HANPP 和 HANPP 引起的土壤流失均呈上升趋势，而 SRS 呈下降趋势。在 3 种移民安置情景中，天然草地情景表现出最高的 HANPP、最高的 HANPP 引起的土壤流失和最低的 SRS。当 HANPP 率超过 38.9 % 时，其对 SRS 的影响超过气候因子，成为影响 SRS 的主导因素。此外，SRS 的下降随着 HANPP 的进一步增加而显著加速，表明存在可持续的阈值。这项研究促进了对人类活动对生态系统服务影响的理解，并对土地资源和生态系统的可持续发展具有重大影响。