Microbial characteristics of ectomycorrhizal mat communities in Oregon and California |
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| Authors: | R P Griffiths E R Ingham B A Caldwell M A Castellano K Cromack Jr |
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| Institution: | (1) Department of Microbiology, Oregon State University, 97331 Corvallis, OR, USA;(2) Department of Botany and Plant Pathology, Oregon State University, 97331 Corvallis, OR, USA;(3) Forest Service, Pacific Northwest Research Station, Forest Sciences Laboratory, United States Department of Agriculture, 3200 Jefferson Way, 97331 Corvallis, OR, USA;(4) Department of Forest Science, Oregon State University, 97331 Corvallis, OR, USA |
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| Abstract: | Summary Specialized ectomycorrhizal fungi form dense mats in forest soils that have different enzyme levels, higher respiration rates, more biomass, different soil fauna, and different soil chemistry compared with adjacent soils not obviously colonized by these mats. In this study, mats formed by two genera of fungi collected in three locations were compared with a wide range of measurements. Per cent moisture, pH, chloroform fumigation-flush C, anaerobic N mineralization, exchangeable ammonium, and respiration, N2 fixation, and denitrification rates were compared between soils or litter colonized by ectomycorrhizal mat-forming fungi and adjacent non-mat material. Significant differences were observed between the two genera of mat-forming fungi and also between mats formed primarily in mineral soil and those formed in litter. These differences suggest that different mat-forming fungi perform different functions in forest soils and that these fungi function differently in mineral soil compared with litter.Published as Technical Paper 9496, Oregon Agricultural Experiment Station |
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| Keywords: | Ectomycorrhizae Microbial activity Nitrogen cycle Mat communities |
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