Global biogeography of fungal and bacterial biomass carbon in topsoil ...

• Main Authors: He, Liyuan, Rodrigues, Jorge, Soudzilovskaia, Nadejda, Barceló, Milagros, Olsson, Pål Axel, Song, Changchun, Tedersoo, Leho, Yuan, Fenghui, Yuan, Fengming, Lipson, David, Xu, Xiaofeng
• Format: Dataset
• Language: English
• Published: Dryad 2020
• Subjects: FOS Biological sciences; Tundra
• Online Access: https://dx.doi.org/10.5061/dryad.qrfj6q5db; https://datadryad.org/stash/dataset/doi:10.5061/dryad.qrfj6q5db

Bacteria and fungi, representing two major soil microorganism groups, play an important role in global nutrient biogeochemistry. Biogeographic patterns of bacterial and fungal biomass are of fundamental importance for mechanistically understanding nutrient cycling. We synthesized 1323 data points of phospholipid fatty acid-derived fungal biomass C (FBC), bacterial biomass C (BBC), and fungi:bacteria (F:B) ratio in topsoil, spanning 11 major biomes. The FBC, BBC, and F:B ratio display clear biogeographic patterns along latitude and environmental gradients including mean annual temperature, mean annual precipitation, net primary productivity, root C density, soil temperature, soil moisture, and edaphic factors. At the biome level, tundra has the highest FBC and BBC densities at 3684 (95% confidence interval: 1678~8084) mg kg-1 and 428 (237~774) mg kg-1, respectively; desert has the lowest FBC and BBC densities at 16.92 (14.4~19.89) mg kg-1 and 6.83 (6.1~7.65) mg kg-1, respectively. The F:B ratio varies ... : 2.1 Data Compilation We used a combination of keywords, “fung*” or “bacteria*”, “ratio”, and “terrestrial” or “soil”, to search peer-reviewed papers in Google Scholar. The papers were selected via the following criteria: 1) either concurrent fungal biomass and bacterial biomass or F:B ratio was clearly reported; 2) the data were extractable from tables (assessing the text) or figures (using Engauge Digitizer Version 10.7); 3) the study sites were not affected by disturbances such as fire, mining, and heavy metal contamination; and 4) the reported data cover 0-30 cm topsoil. Geographical information of the sampling sites was recorded and used to locate the sites on the global map (Fig. 1). We also collected any available data on soil pH, mean annual precipitation (MAP), mean annual temperature (MAT), SOC, total nitrogen (TN) concentration, and soil texture, and then plotted these variables against the extracted data from global datasets to test the consistency (Fig. S1). We recorded fungal and bacterial ...