Moisture effects on microbial communities in boreal forest floors are stand-dependent |
| |
| Affiliation: | 1. Lipid Chemistry Group, Department of Agricultural Food and Nutritional Science, 4-10 Agriculture/ Forestry Centre, University of Alberta, Edmonton, Alberta, T6G 2P5, Canada;2. Department of Agricultural Food and Nutritional Science, 4-10 Agriculture/ Forestry Centre, University of Alberta, Edmonton, Alberta, T6G 2P5, Canada;3. InnoTech Alberta, 250 Karl Clark Road, Edmonton, Alberta, T6N 1E4, Canada;1. Zurich-Basel Plant Science Center, Department of Environmental Sciences, Botany, University of Basel, Basel, Switzerland;2. Department of Mycorrhizal Symbioses, Institute of Botany ASCR, 252 43, Průhonice, Czech Republic;3. Department of Environmental Sciences, Aquatic and Stable Isotope Biogeochemistry, University of Basel, Basel, Switzerland;4. Muséum national d''Histoire naturelle, Département Systématique et Evolution (UMR 7205 ISYEB), CP 50, 45 rue Buffon, 75005, Paris, France;1. Global Academy of Agriculture and Food Security, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush Campus, Midlothian, EH25 9RG, UK;2. School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, UK;3. The James Hutton Institute, Craigiebuckler, Aberdeen, AB15 8QH, UK |
| |
| Abstract: | Landscape level factors such as overstory canopy composition can have a profound effect on the ecology of microbial communities in boreal forest floors. However, factors influencing community composition at the microsite scale are still poorly described and understood. Here we explored moisture effects on microbial communities in forest floor derived from undisturbed trembling aspen and white spruce stands, two of the dominant trees in the boreal forest of western Canada. Forest floor samples were incubated in a laboratory experiment for a period of one month under a moisture regime ranging from moist to dry (field capacity, 60% of field capacity and wilting point). As in previous studies we found that the origin of the forest floor material had a strong effect on the microbial community. Additionally, we found that moisture manipulation did not alter the microbial communities of the white spruce forest floor. On the other hand, the moisture had a profound effect on the aspen forest floor, and resulted in structurally and functionally distinct microbial communities. This different response to moisture could be linked to the adaptation of microbial groups to the physical environment inherent to the aspen and spruce forest floors and provides an avenue to further work into microbial mediated biogeochemical processes in the boreal forest. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
