Reis Ely Carla R, Perakis Steven S, Cleveland Cory C, Menge Duncan N L, Reed Sasha C, Batterman Sarah A, Crews Timothy E, Dynarski Katherine A, Gei Maga, Gundale Michael J, Jovan Sarah E, Kou-Giesbrecht Sian, Peoples Mark B, Rodríguez-Caballero Emilio, Salmon Verity G, Soper Fiona M, Staccone Anika P, Taylor Benton N, Weber Bettina, Wurzburger Nina
Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR, 97331, USA.
Oak Ridge Institute for Science and Education, Oak Ridge, TN, 37830, USA.
Sci Data. 2025 Aug 5;12(1):1362. doi: 10.1038/s41597-025-05131-4.
Biological nitrogen fixation (BNF) is the main natural source of new nitrogen inputs in terrestrial ecosystems, supporting terrestrial productivity, carbon uptake, and other Earth system processes. We assembled a comprehensive global dataset of field measurements of BNF in all major N-fixing niches across natural terrestrial biomes derived from the analysis of 376 BNF studies. The dataset comprises 32 variables, including site location, biome type, N-fixing niche, sampling year, quantification method, BNF rate (kg N ha y), the percentage of nitrogen derived from the atmosphere (%N), N fixer or N-fixing substrate abundance, BNF rate per unit of N fixer abundance, and species identity. Overall, the dataset combines 1,207 BNF rates for trees, shrubs, herbs, soil, leaf litter, woody litter, dead wood, mosses, lichens, and biocrusts, 152 herb %N values, 1,005 measurements of N fixer or N-fixing substrate abundance, and 762 BNF rates per unit of N fixer abundance for a total of 424 species across 66 countries. This dataset facilitates synthesis, meta-analysis, upscaling, and model benchmarking of BNF fluxes at multiple spatial scales.
生物固氮是陆地生态系统中新增氮输入的主要自然来源，支撑着陆地生产力、碳吸收及其他地球系统过程。我们通过对376项生物固氮研究进行分析，汇编了一个全面的全球数据集，其中包含自然陆地生物群落中所有主要固氮生态位的生物固氮实地测量数据。该数据集包含32个变量，包括地点位置、生物群落类型、固氮生态位、采样年份、量化方法、生物固氮速率（千克氮每公顷每年）、源自大气的氮的百分比（%N）、固氮生物或固氮底物丰度、单位固氮生物丰度的生物固氮速率以及物种身份。总体而言，该数据集汇总了树木、灌木、草本植物、土壤、落叶、木质凋落物、枯木、苔藓、地衣和生物结皮的1207个生物固氮速率、152个草本植物%N值、1005个固氮生物或固氮底物丰度测量值以及66个国家424个物种的单位固氮生物丰度的762个生物固氮速率。这个数据集有助于在多个空间尺度上对生物固氮通量进行综合分析、荟萃分析、尺度上推和模型基准测试。
