Zhu Jianjun, Zhang Shilei, Chen Chen, Li Chunlin
State Key Laboratory of Microbial Technology, Shandong University, Qingdao, China.
Greensum Ecology Co., Ltd., QingDao, China.
PeerJ. 2025 Aug 8;13:e19854. doi: 10.7717/peerj.19854. eCollection 2025.
Ecological restoration techniques are extensively employed in the ecological restoration of damaged mountain ecosystems effectively restoring the plant community and improving soil functions. Aggregate spray seeding technology as an effective ecological restoration method, can quickly restore the damaged slopes to their previous status and keep the ecosystem functions. However, the lack of understanding of the characteristic of carbon storage as well as its influencing factors limits the scientific management of carbon sink function of the rehabilitated damaged mountain ecosystem. In this study, relying on field surveys in the East Ussuri River Basin, we analyzed the carbon storage distribution and its influencing factors in damaged mountain slopes that had been restored through the spray seeding technology after an 8-year restoration phase. The results showed that the carbon storage distribution of the damaged slopes repaired by aggregate spray seeding is in the order of soil layer > tree layer > shrub layer > litter layer > herbaceous layer. Among them, the carbon storage of the vegetation layer is mainly distributed in the tree layer, and its size is similar to that of undisturbed natural slopes. Plants and soil are the main factors affecting the carbon storage of the repaired slopes, where the plant density has a significant positive correlation with carbon storage, accounting for 19% of the carbon storage variation, and the soil bulk density has a significant negative correlation with carbon storage, accounting for 23.7% of the carbon storage variation. This study reveals the mechanism of the aggregate spray seeding technology in restoring the carbon storage of damaged slopes and points out that regulating vegetation density and improving soil conditions are key to enhancing the carbon sink capacity of slopes.
生态修复技术广泛应用于受损山地生态系统的生态修复中，能有效恢复植物群落并改善土壤功能。团聚体喷播技术作为一种有效的生态修复方法，能快速将受损边坡恢复到先前状态并保持生态系统功能。然而，对碳储存特征及其影响因素的认识不足限制了对受损山地生态系统修复后碳汇功能的科学管理。在本研究中，依托对乌苏里江流域东部的实地调查，我们分析了经过8年修复期后通过喷播技术修复的受损山坡的碳储存分布及其影响因素。结果表明，通过团聚体喷播修复的受损边坡的碳储存分布顺序为土壤层＞乔木层＞灌木层＞凋落物层＞草本层。其中，植被层的碳储存主要分布在乔木层，其大小与未受干扰的自然边坡相似。植物和土壤是影响修复后边坡碳储存的主要因素，其中植物密度与碳储存呈显著正相关，占碳储存变化的19%，土壤容重与碳储存呈显著负相关，占碳储存变化的23.7%。本研究揭示了团聚体喷播技术在恢复受损边坡碳储存方面的机制，并指出调节植被密度和改善土壤条件是提高边坡碳汇能力的关键。
