Ghaderi et al-Supplementary Data.xlsx

Predatory nematodes in the order Mononchida play a key biological regulation role in soil food webs but remain underexplored in terms of their ecosystem functions. Estimating biomass using morphological traits provides a practical method for assessing their contribution to carbon dynamics. This study calculates individual biomass and daily carbon budgets for mononchids using taxon-specific body-size data from publicly available literature. We calculated biomass and carbon budgets for 398 populations worldwide, representing 234 species, 47 genera, 12 subfamilies, and 8 families using Andrássy's formula. The estimated average biomass (fresh weight) was 6.71 µg for females and 10.75 µg for males across all species with available body size measurements, with corresponding daily carbon budgets of 0.07103 µg and 0.10481 µg, respectively. Biomass variability was notable across certain taxa (typically taxa within the family Mononchidae) but not all. Additionally, we tested the <i>G</i> index (female gonad-to-body length ratio) as a proxy for carbon budget estimation but found no significant correlation between these two parameters (r = 0.174, p = 0.087). This study provides a comprehensive dataset for biomass and carbon budget estimation in predatory nematodes, enhancing understanding of their functional roles in carbon dynamics and ecosystem processes.

单齿目（Mononchida）捕食性线虫在土壤食物网中发挥着关键的生物调控作用，但目前对其生态系统功能的研究仍较为匮乏。利用形态特征估算生物量，是评估其对碳动态贡献的实用手段。本研究利用公开文献中获取的类群特异性体长数据，对单齿目线虫的个体生物量与日碳预算进行了测算。本研究通过安德拉西公式（Andrássy's formula），对全球范围内涵盖234种、47属、12亚科及8科的398个种群的生物量与碳预算开展了计算。在所有具备体长测量数据的物种中，雌虫的平均鲜重生物量估算值为6.71 μg，雄虫为10.75 μg；对应的日碳预算分别为0.07103 μg与0.10481 μg。部分类群（通常为单齿科（Mononchidae）内的类群）的生物量变异较为显著，但并非所有类群均存在此类变异。此外，本研究以G指数（雌虫生殖腺长度与体长之比，female gonad-to-body length ratio）作为碳预算估算的替代指标进行了检验，但未发现这两个参数间存在显著相关性（r=0.174，p=0.087）。本研究构建了捕食性线虫生物量与碳预算估算的综合数据集，有助于深化对其在碳动态及生态系统过程中功能角色的认知。