Production and turnover of mycorrhizal soil mycelium relate to variation in drought conditions in Mediterranean Pinus pinaster, Pinus sylvestris and Quercus ilex forestsShow others and affiliations
2021 (English)In: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 230, no 4, p. 1609-1622Article in journal (Refereed) Published
Abstract [en]
- 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 production and turnover of mycorrhizal mycelium in Mediterranean Pinus pinaster, Pinus sylvestris and Quercus ilex forests and related the estimates to standardized 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-February, by quantifying the fungal biomass (ergosterol) in ingrowth mesh bags and using statistical modelling. SPI for time scales of 1 to 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 day-1 and 7.2-9.9 times year-1 over the different forest types and were positively correlated with 2- and 3-month SPI over the study period.
- Our results demonstrate that mycorrhizal mycelial biomass vary with season and tree species and we speculate that production and turnover are related to physiology and plant-host performance during drought.
Place, publisher, year, edition, pages
Wiley-Blackwell Publishing Inc., 2021. Vol. 230, no 4, p. 1609-1622
Keywords [en]
Drought, ectomycorrhiza, extramatrical mycelium, extraradical mycelium, fungal biomass, precipitation, production, turnover
National Category
Forest Science
Identifiers
URN: urn:nbn:se:oru:diva-86787DOI: 10.1111/nph.17012ISI: 000593642900001PubMedID: 33091152Scopus ID: 2-s2.0-85096845792OAI: oai:DiVA.org:oru-86787DiVA, id: diva2:1479213
Note
Funding Agencies:
Spanish Ministry of Economy and Competitivity AGL2015-66001-C3RTI2018-099315-A-I00
Spanish Government RYC-2016-20528
2020-10-262020-10-262021-12-08Bibliographically approved