title: Vertical distribution of an ectomycorrhizal community in upper soil horizons of a young Norway spruce (Picea abies [L.] Karst.) stand of the Bavarian Limestone Alps.
abstract: The vertical niche differentiation of genera of ectomycorrhiza (ECM) was assessed in a 17-year-old Norway spruce (Picea abies [L.] Karst.) plantation on a mountainous dolomitic site (1,050 m above sea level) of the Bavarian Limestone Alps. We determined ECM anatomotypes, recorded the abundance of corresponding ECM root tips and classified them into groups of ECM exploration types, which refer to the organisation and the extent of their extramatrical mycelia. The abundance of ECM was highest in the organic soil layers, compared to the mineral soil horizon. The ordination of the ECM communities and of the exploration types revealed segregation related to soil horizon properties. While Cenococcum geophilum preferred the organic soil layers, Lactarius spp., Tomentella spp. and Craterellus tubaeformis were generally most abundant in the mineral soil horizons. Cenococcum geophilum was the predominant species, possibly based on enhanced competitiveness under the prevailing site conditions. The short-distance exploration types (e.g. C. geophilum) preferentially colonised the organic soil layer, whereas the contact types (e.g. most of the Tomentella spp., C. tubaeformis) together with medium-distance types (e.g. Amphinema byssoides) were primarily associated with the underlying A-horizons. Therefore, the soil horizons had an important effect on the distribution of ECM and on their community structure. The spatial niche differentiation of ECM genera and exploration types is discussed in regard to specific physico-chemical properties of soil horizon and the assumed ecophysiological strategies of ECM.
authors.affiliation: Department of Ecology, Forest Nutrition and Water Resources, Technische Universität München, 85354, Freising, Germany. baierr@forst.tu-muenchen.de.|Fachgebiet Waldernährung und Wasserhaushalt, Am Hochanger 13, D-85354, Freising, Germany. baierr@forst.tu-muenchen.de.
authors.forename: Roland
authors.initials: R
authors.lastname: Baier
authors.affiliation: Faculty of Biology, Department of Biology I, Mycological Biodiversity, Ludwig-Maximilians-Universität München, 80638, München, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Ingenhaag
authors.affiliation: Department of Ecology, Plant Ecophysiology, Technische Universität München, 85354, Freising, Germany.
authors.forename: Helmut
authors.initials: H
authors.lastname: Blaschke
authors.affiliation: Department of Ecology, Forest Nutrition and Water Resources, Technische Universität München, 85354, Freising, Germany.
authors.forename: Axel
authors.initials: A
authors.lastname: Göttlein
authors.affiliation: Faculty of Biology, Department of Biology I, Mycological Biodiversity, Ludwig-Maximilians-Universität München, 80638, München, Germany.
authors.forename: Reinhard
authors.initials: R
authors.lastname: Agerer
mesh_terms: D044822:Biodiversity; D015169:Colony Count, Microbial; D005858:Germany; D025282:Mycelium / Q000302:isolation & purification; D038821:Mycorrhizae / Q000145:classification / Q000302:isolation & purification*; D028222:Picea / Q000382:microbiology*; D018517:Plant Roots / Q000382:microbiology; D012987:Soil / Q000032:analysis; D012988:Soil Microbiology; D013045:Species Specificity
chemical_list: D012987:Soil