Abstract：
With the widespread use of biochar, the cascading effects of biochar exposure on soil fauna urgently require deeper understanding. A meta-analysis quantified hierarchical changes in functional traits and community diversity of soil fauna under biochar exposure. Antioxidant enzymes (24.1 %) did not fully mitigate the impact of MDA (13.5 %), leading to excessive DNA damage in soil fauna (21.2 %). Concurrently, reproduction, growth, and survival rates decreased by 20.2 %, 8.5 %, and 21.2 %, respectively. Due to a 39.7 % increase in avoidance behavior of soil fauna towards biochar, species richness ultimately increased by 80.2 %. Compared to other feeding habits, biochar posed a greater threat to the survival of herbivores. Additionally, macrofauna were the most sensitive to biochar. The response of soil fauna also depended on the type, size, concentration, and duration of biochar exposure. It should be emphasized that as exposure concentration increased, the damage to soil fauna became more severe. Furthermore, the smaller the biochar sizes, the greater the damage to soil fauna. To mitigate the adverse effects on soil fauna, this study recommens applying biochar at appropriate times and selecting large sizes in low to medium concentrations. These findings confirm the threat of biochar to soil health from the perspective of soil fauna.
摘要：
随着生物炭的广泛应用,生物炭暴露对土壤动物的级联效应迫切需要更深入的了解。荟萃分析量化了生物炭暴露下土壤动物功能性状和群落多样性的分层变化。抗氧化酶（24.1％）没有完全减轻MDA（13.5％）的影响，导致土壤动物DNA过度损伤(21.2%)。同时,繁殖，增长,存活率下降了20.2%,8.5%,和21.2%，分别。由于土壤动物对生物炭的回避行为增加了39.7%，物种丰富度最终增加了80.2%。与其他喂养习惯相比，生物炭对食草动物的生存构成了更大的威胁。此外,大型动物对生物炭最敏感。土壤动物的响应也取决于类型，尺寸,浓度,和生物炭暴露的持续时间。应该强调的是，随着暴露浓度的增加，对土壤动物的破坏变得更加严重。此外，生物炭的尺寸越小，对土壤动物的破坏越大。为了减轻对土壤动物的不利影响，本研究建议在适当的时间应用生物炭，并在低至中等浓度下选择大尺寸。这些发现从土壤动物的角度证实了生物炭对土壤健康的威胁。
