Nitrogen fixation and acetylene reduction in decaying conifer boles: effects of incubation time, aeration, and moisture content
| dc.contributor.author | Warwick B. Silvester | |
| dc.contributor.author | Phillip Sollins | |
| dc.contributor.author | Thomas Verhoeven | |
| dc.contributor.author | Steven P. Cline | |
| dc.date.accessioned | 2014-09-08T04:44:53Z | |
| dc.date.available | 2014-09-08T04:44:53Z | |
| dc.date.issued | 2007 | |
| dc.description.abstract | Nitrogen fixation and acetylene reduction in decaying conifer boles: effects of incubation time, aeration, and moisture content. Can. J. For. Res. 12: 646—652. Free-living microaerophiles fixed 15N2 and reduced acetylene in fallen tree boles at two old-growth Pseudotsuga menziesii stands in western Oregon. Acetylene reduction was most rapid under an atmosphere of 2—10% O2, whereas under prolonged anaerobic conditions it was at or below detection limits. Acetylene reduction rates increased up to fourfold during long-term incubations in acetylene (> 12 h). Ratios of acetylene reduction to N2 fixation frequently exceeded 6.0 during such long-term incubations but averaged 3.5 when samples were incubated < 7 h; consequently, long-term incubation of low-activity material in acetylene should be avoided. A preliminary survey indicated that N2 fixation by free-living organisms in fallen boles was less than other potential N inputs to fallen boles and to the forest ecosystem. | en_US |
| dc.identifier.uri | http://hdl.handle.net/123456789/5443 | |
| dc.language.iso | en | en_US |
| dc.title | Nitrogen fixation and acetylene reduction in decaying conifer boles: effects of incubation time, aeration, and moisture content | en_US |
| dc.type | Article | en_US |