Bibliographic Details
| Title: |
Global distribution and drivers of relative contributions among soil nitrogen sources to terrestrial plants |
| Authors: |
Chao-Chen Hu, Xue-Yan Liu, Avery W. Driscoll, Yuan-Wen Kuang, E. N. Jack Brookshire, Xiao-Tao Lü, Chong-Juan Chen, Wei Song, Rong Mao, Cong-Qiang Liu, Benjamin Z. Houlton |
| Source: |
Nature Communications, Vol 15, Iss 1, Pp 1-9 (2024) |
| Publisher Information: |
Nature Portfolio, 2024. |
| Publication Year: |
2024 |
| Collection: |
LCC:Science |
| Subject Terms: |
Science |
| More Details: |
Abstract Soil extractable nitrate, ammonium, and organic nitrogen (N) are essential N sources supporting primary productivity and regulating species composition of terrestrial plants. However, it remains unclear how plants utilize these N sources and how surface-earth environments regulate plant N utilization. Here, we establish a framework to analyze observational data of natural N isotopes in plants and soils globally, we quantify fractional contributions of soil nitrate (f NO3-), ammonium (f NH4+), and organic N (f EON) to plant-used N in soils. We find that mean annual temperature (MAT), not mean annual precipitation or atmospheric N deposition, regulates global variations of f NO3-, f NH4+, and f EON. The f NO3- increases with MAT, reaching 46% at 28.5 °C. The f NH4+ also increases with MAT, achieving a maximum of 46% at 14.4 °C, showing a decline as temperatures further increase. Meanwhile, the f EON gradually decreases with MAT, stabilizing at about 20% when the MAT exceeds 15 °C. These results clarify global plant N-use patterns and reveal temperature rather than human N loading as a key regulator, which should be considered in evaluating influences of global changes on terrestrial ecosystems. |
| Document Type: |
article |
| File Description: |
electronic resource |
| Language: |
English |
| ISSN: |
2041-1723 |
| Relation: |
https://doaj.org/toc/2041-1723 |
| DOI: |
10.1038/s41467-024-50674-6 |
| Access URL: |
https://doaj.org/article/43f3b12d55db4209a5b02d22d3cf30b2 |
| Accession Number: |
edsdoj.43f3b12d55db4209a5b02d22d3cf30b2 |
| Database: |
Directory of Open Access Journals |
