Adaptive root foraging strategies along a boreal-temperate forest gradient
| Autor: | Veiko Uri, Jens-Konrad Preem, Heljä-Sisko Helmisaari, Antti-Jussi Lindroos, Elena Vanguelova, Naima Kabral, Katrin Rosenvald, Jaana Leppälammi-Kujansuu, Douglas L. Godbold, Ulrich Zang, Marika Truu, Jürgen Aosaar, Werner Borken, Kaarin Parts, Ülle Napa, Ivika Ostonen, Mats Varik, Kęstutis Armolaitis, Pekka Nöjd, Päivi Merilä, Leho Tedersoo, Jaak Truu, Martin Lukac, Krista Lõhmus, Jane Frey, Mai Kukumägi |
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| Přispěvatelé: | Department of Forest Sciences, Forest Soil Science and Biogeochemistry, Doctoral Programme in Sustainable Use of Renewable Natural Resources, Forest Ecology and Management |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Nitrogen Physiology soil C:N ratio Plant Science Root system Biology Models Biological Plant Roots 010603 evolutionary biology 01 natural sciences complex mixtures Basal area root foraging fine and ectomycorrhizal root biomass Mycorrhizae Taiga Botany Temperate climate Biomass root morphology Betula Soil Microbiology 2. Zero hunger 4112 Forestry Rhizosphere Biomass (ecology) Bacteria Geography Mycelium fungi Temperate forest Soil carbon 15. Life on land Adaptation Physiological Subarctic climate Carbon soil and rhizosphere bacteria Europe 13. Climate action climate gradient boreal and temperate forests ectomycorrhizal (EcM) mycelium 010606 plant biology & botany |
| ISSN: | 1469-8137 |
| Popis: | The tree root–mycorhizosphere plays a key role in resource uptake, but also in the adaptation of forests to changing environments. The adaptive foraging mechanisms of ectomycorrhizal (EcM) and fine roots of Picea abies, Pinus sylvestris and Betula pendula were evaluated along a gradient from temperate to subarctic boreal forest (38 sites between latitudes 48°N and 69°N) in Europe. Variables describing tree resource uptake structures and processes (absorptive fine root biomass and morphology, nitrogen (N) concentration in absorptive roots, extramatrical mycelium (EMM) biomass, community structure of root-associated EcM fungi, soil and rhizosphere bacteria) were used to analyse relationships between root system functional traits and climate, soil and stand characteristics. Absorptive fine root biomass per stand basal area increased significantly from temperate to boreal forests, coinciding with longer and thinner root tips with higher tissue density, smaller EMM biomass per root length and a shift in soil microbial community structure. The soil carbon (C) : N ratio was found to explain most of the variability in absorptive fine root and EMM biomass, root tissue density, N concentration and rhizosphere bacterial community structure. We suggest a concept of absorptive fine root foraging strategies involving both qualitative and quantitative changes in the root–mycorrhiza–bacteria continuum along climate and soil C : N gradients. |
| Databáze: | OpenAIRE |
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