Pål Axel Olsson

TL;DR: It is shown that bacterial, but not fungal, genetic diversity is highest in temperate habitats and that microbial gene composition varies more strongly with environmental variables than with geographic distance, and that the relative contributions of these microorganisms to global nutrient cycling varies spatially.

TL;DR: Various aspects of how the fatty acid signatures can be used for studies related to questions of biomass distribution and nutritional status of mycorrhizal fungi are discussed.

TL;DR: The fatty acid 16:1 omega 5 from the neutral lipid fraction, containing triglycerides, dominated in soils with mycorrhizal hyphae, and decreased during storage of soils, indicating a decrease in storage lipids.

TL;DR: Dazomet application strongly suppressed colonisation of the linseed roots by AM fungi throughout the experiment, and analyses of bacteria-specific fatty acids indicated that the bacterial biomass in the soil was not affected by either dazomet or P application.

TL;DR: The fungal neutral lipid/phospholipid ratio in the extraradical mycelium was positively correlated with the level of root infection and thus decreased with increasing applications of P, and indicated that at high P levels, less carbon was allocated to storage structures.