Is moss-associated nitrogen fixation controlled by the same factors across shoots, species and sites?
Fuente:
PubMed
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Environmental and experimental botany
2025
|
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1868266125117095937 |
|---|---|
| author | Levinsen, Jørgen Ulrik Graudal Yuan, Mingyue Michelsen, Anders Rousk, Kathrin |
| author_facet | Levinsen, Jørgen Ulrik Graudal Yuan, Mingyue Michelsen, Anders Rousk, Kathrin Levinsen, Jørgen Ulrik Graudal Yuan, Mingyue Michelsen, Anders Rousk, Kathrin |
| collection | PubMed - marine biology |
| contents | Is moss-associated nitrogen fixation controlled by the same factors across shoots, species and sites? Levinsen, Jørgen Ulrik Graudal Yuan, Mingyue Michelsen, Anders Rousk, Kathrin Biological N fixation performed by moss-associated cyanobacteria is among the main sources of new nitrogen (N) input in pristine subarctic ecosystems. Yet, until now there has been a lack of knowledge on the drivers of biological N fixation on small spatial scales (moss segment) in relation to the drivers at larger scales (moisture ecosystem). To investigate this, we assessed the capacity of N fixation along shoots of two common moss species, and collected along a steep precipitation gradient in the Subarctic. Furthermore, concentrations of nutrients and pH were analysed along the same moss shoot-gradients. We found the highest nitrogenase activity in collected at the location with the highest mean annual precipitation. Nitrogenase activity varied significantly along the moss shoots, and between species and location along the precipitation gradient. had the highest nitrogenase activity in the middle segments, while for , it was highest in the lowest segments (below 3 cm). Contents of iron, molybdenum and N generally increased with moss segment depth, but phosphorus concentrations decreased and pH was stable across segments. Taken together, the factors that drive nitrogenase activity at small scales differ between moss species, whereas precipitation predominantly controls nitrogenase activity at larger scales (across habitats). |
| format | Artículo científico |
| id | pubmed_41244956 |
| institution | PubMed |
| language | en |
| publishDate | 2025 |
| publisher | Environmental and experimental botany |
| record_format | pubmed |
| spellingShingle | Is moss-associated nitrogen fixation controlled by the same factors across shoots, species and sites? Levinsen, Jørgen Ulrik Graudal Yuan, Mingyue Michelsen, Anders Rousk, Kathrin Is moss-associated nitrogen fixation controlled by the same factors across shoots, species and sites? Levinsen, Jørgen Ulrik Graudal Yuan, Mingyue Michelsen, Anders Rousk, Kathrin Biological N fixation performed by moss-associated cyanobacteria is among the main sources of new nitrogen (N) input in pristine subarctic ecosystems. Yet, until now there has been a lack of knowledge on the drivers of biological N fixation on small spatial scales (moss segment) in relation to the drivers at larger scales (moisture ecosystem). To investigate this, we assessed the capacity of N fixation along shoots of two common moss species, and collected along a steep precipitation gradient in the Subarctic. Furthermore, concentrations of nutrients and pH were analysed along the same moss shoot-gradients. We found the highest nitrogenase activity in collected at the location with the highest mean annual precipitation. Nitrogenase activity varied significantly along the moss shoots, and between species and location along the precipitation gradient. had the highest nitrogenase activity in the middle segments, while for , it was highest in the lowest segments (below 3 cm). Contents of iron, molybdenum and N generally increased with moss segment depth, but phosphorus concentrations decreased and pH was stable across segments. Taken together, the factors that drive nitrogenase activity at small scales differ between moss species, whereas precipitation predominantly controls nitrogenase activity at larger scales (across habitats). |
| title | Is moss-associated nitrogen fixation controlled by the same factors across shoots, species and sites? |
| url | https://pubmed.ncbi.nlm.nih.gov/41244956/ |