Production and turnover of mycorrhizal soil mycelium relate to variation in drought conditions in Mediterranean Pinuspinaster, Pinus sylvestris and Quercus ilex forests
| Autor: | Sergio de-Miguel, Yasmine Piñuela, Carles Castaño, José Antonio Bonet, Josu G. Alday, Andreas Hagenbo, Juan Martínez de Aragón |
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| Předmět: |
0106 biological sciences
0301 basic medicine Mediterranean climate Nutrient cycle Physiology Plant Science Precipitation Biology Forests 01 natural sciences Trees 03 medical and health sciences Quercus Soil Fungal biomass Mycorrhizae Ecosystem Mycelium Biomass (ecology) Drought fungi Production Pinus sylvestris Soil carbon biology.organism_classification Pinus Turnover Droughts Ectomycorrhiza 030104 developmental biology Agronomy Extraradical mycelium Pinus pinaster Extramatrical mycelium 010606 plant biology & botany |
| Zdroj: | Recercat: Dipósit de la Recerca de Catalunya Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) Recercat. Dipósit de la Recerca de Catalunya instname Repositorio Abierto de la UdL Universitad de Lleida |
| Popis: | Summary: In forests, ectomycorrhizal mycelium is pivotal for driving soil carbon and nutrient cycles, but how ectomycorrhizal mycelial dynamics vary in ecosystems with drought periods is unknown. We quantified the production and turnover of mycorrhizal mycelium in Mediterranean Pinus pinaster, Pinus sylvestris and Quercus ilex forests and related the estimates to standardised precipitation index (SPI), to study how mycelial dynamics relates to tree species and drought‐moisture conditions. Production and turnover of mycelium was estimated between July and February, by quantifying the fungal biomass (ergosterol) in ingrowth mesh bags and using statistical modelling. SPI for time scales of 1-3 months was calculated from precipitation records and precipitation data over the study period. Forests dominated by Pinus trees displayed higher biomass but were seasonally more variable, as opposed to Q. ilex forests where the mycelial biomass remained lower and stable over the season. Production and turnover, respectively, varied between 1.4-5.9 kg ha−1 d−1 and 7.2-9.9 times yr−1 over the different forest types and were positively correlated with 2‐month and 3‐month SPI over the study period. Our results demonstrated that mycorrhizal mycelial biomass varied with season and tree species and we speculate that production and turnover are related to physiology and plant host performance during drought. The project was supported by the Spanish Ministry of Economy and Competitivity (AGL2015‐66001‐C3 and RTI2018‐099315‐A‐I00); JGA was supported by a Ramon y Cajal fellowship (RYC‐2016‐20528). |
| Databáze: | OpenAIRE |
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