| Autor: |
Robidart, JC, Church, MJ, Ryan, JP, Ascani, F, Wilson, ST, Bombar, D, Marin, R, Richards, KJ, Karl, DM, Scholin, CA, Zehr, JP |
| Jazyk: |
angličtina |
| Rok vydání: |
2014 |
| Zdroj: |
Robidart, JC; Church, MJ; Ryan, JP; Ascani, F; Wilson, ST; Bombar, D; et al.(2014). Ecogenomic sensor reveals controls on N2-fixing microorganisms in the North Pacific Ocean. ISME Journal, 8(6), 1175-1185. doi: 10.1038/ismej.2013.244. UC Santa Cruz: Retrieved from: http://www.escholarship.org/uc/item/3kg0j0p2 |
| DOI: |
10.1038/ismej.2013.244. |
| Popis: |
Nitrogen-fixing microorganisms (diazotrophs) are keystone species that reduce atmospheric dinitrogen (N2) gas to fixed nitrogen (N), thereby accounting for much of N-based new production annually in the oligotrophic North Pacific. However, current approaches to study N2fixation provide relatively limited spatiotemporal sampling resolution; hence, little is known about the ecological controls on these microorganisms or the scales over which they change. In the present study, we used a drifting robotic gene sensor to obtain high-resolution data on the distributions and abundances of N2-fixing populations over small spatiotemporal scales. The resulting measurements demonstrate that concentrations of N2fixers can be highly variable, changing in abundance by nearly three orders of magnitude in less than 2 days and 30 km. Concurrent shipboard measurements and long-term time-series sampling uncovered a striking and previously unrecognized correlation between phosphate, which is undergoing long-term change in the region, and N2-fixing cyanobacterial abundances. These results underscore the value of high-resolution sampling and its applications for modeling the effects of global change. © 2014 International Society for Microbial Ecology. All rights reserved. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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