Influence of resource unit distribution and quality on the activity of soil fungi in a particulate medium.

摘要: Experiments were set up to assess the relative impacts of grass lamina fragment density, size and quality on activity growth four fungi in a particulate soil-like matrix. The studied Cladosporium cladosporioides, Fusarium lateritium, Phoma exigua Trichoderma viride, all which are common inhabitants UK upland grassland soils. Resource was varied by using three contrasting grasses as sources fragments: Lolium perenne, Agrostis capillaris Nardus stricta. All able forage effectively through matrix (at rate 1–2 ml d−1) colonize partially decompose available fragments (up 40% d. wt loss). Foraging rates (ml affected species but not density or size. In general, F. lateritium T. viride foraged at faster than other species. Mycelial directly proportional total availability unaffected Biomass production solid media also related substrate (carbohydrate) availability. results indicate that these can adjust their patterns response so maximize foraging efficiency (energy acquired per unit exploratory biomass production). Differences responsible for 50% reduction mycelial activity.