Soil microbial diversity and community structure across a climatic gradient in western Canada |
| |
Authors: | William J Staddon Jack T Trevors Luc C Duchesne Carol a Colombo |
| |
Institution: | (1) Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada, N1G 2W1;(2) Canadian Forest Service, Great Lakes Forestry Centre, P.O. Box 490, 1219 Queen Street East, Sault Ste. Marie, Ontario, Canada, P6A 5M7 |
| |
Abstract: | Soil microbial functional diversity was assessed along a climatic gradient in Western Canada. Mineral soil samples were collected from jack pine (Pinus banksiana Lamb.) stands along an 800km transect between Prince Albert, Saskatchewan and Gillam, Manitoba. Microbial communities were isolated from the soil samples, washed and inoculated into wells of Gram-negative Biolog microplates. Optical density values were used to calculate Shannon diversity indices and to perform principal component analysis. Colour development rank plots (CDR) were created by expressing optical density values as a percentage of total colour development and plotting the wells in descending order. Soil microbial functional diversity decreased with increasing latitude and correlated positively with measures of atmospheric temperature and pH. Soil microbial diversity may be lower in northern sites due to decreased productivity, nutrient limitation and higher acidity. CDR plots are consistent with a trend of increasing environmental harshness moving north along the transect. |
| |
Keywords: | soil microbial diversity boreal forest sole-carbon-source utilization climatic gradient |
本文献已被 SpringerLink 等数据库收录! |
|