Ectomycorrhizal community composition and function in a spruce forest transitioning between nitrogen and phosphorus limitation

• Nitrogen is the main limiting nutrient in boreal ecosystems, but studies in southwest Sweden suggest that certain forests approach phosphorus (P) limitation driven by nitrogen (N) deposition. We added N, P or N + P to a Norway spruce forest in this region, to push the system to N or P limitation. Tree growth and needle nutrient concentrations indicated that the trees are P limited. EMF biomass was reduced only by N + P additions. Soil EMF communities responded more strongly to P than to N. Addition of apatite to ingrowth meshbags altered EMF community composition and enhanced the abundance of Imleria badia in the control and N plots, but not when P was added. The ecological significance of this species is discussed. Effects on tree growth, needle chemistry, and EMF communities indicate a dynamic interaction between EMF fungi and the nutrient status of trees and soils. (C) 2018 Elsevier Ltd and British Mycological Society. All rights reserved.

Ämnesord

NATURVETENSKAP  -- Biologi -- Ekologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences -- Ecology (hsv//eng)

LANTBRUKSVETENSKAPER  -- Lantbruksvetenskap, skogsbruk och fiske -- Skogsvetenskap (hsv//swe)

AGRICULTURAL SCIENCES  -- Agriculture, Forestry and Fisheries -- Forest Science (hsv//eng)

Nyckelord

Apatite

Ectomycorrhizae

Ergosterol

Nitrogen and phosphorus limitation

Nitrogen deposition

Nitrogen leaching

Forestry and Wood Technology

Skog och träteknik

Ecology

Ekologi

Apatite

Ectomycorrhizae

Ergosterol

Nitrogen and phosphorus limitation

Nitrogen deposition

Nitrogen leaching

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)