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  • The role of nutrients in drought-induced tree mortality and recovery [Elektronski vir]
    Gessler, Arthur ; Schaub, Marcus ; McDowell, Nate G.
    Global forests are experiencing rising temperatures and more severe droughts, withconsistently dire forecasts for negative future impacts. Current research on the physiologicalmechanisms underlying ... drought impacts is focused on the water- and carbon-associatedmechanisms. The role of nutrients is notably missing from this research agenda. Here, weinvestigate what role, if any, forest nutrition plays for survival and recovery of forests duringand after drought. High nutrient availability may play a detrimental role in drought survivaldue to preferential biomass allocation aboveground that (1) predispose plants to hydraulicconstraints limiting photosynthesis and promoting hydraulic failure, (2) increases carbon costsduring periods of carbon starvation, and (3) promote biotic attack due to low tissue carbon:nitrogen (C : N). When nutrient uptake occurs during drought, high nutrient availability canincrease water use efficiency thus minimizing negative feedbacks between carbon andnutrient balance. Nutrients are released after drought ceases, which might promote fasterrecovery but the temporal dynamics of microbial immobilization and nutrient leaching have asignificant impact on nutrient availability. We provide a framework for understandingnutrient impacts on drought survival that allows a more complete analysis of forest ecosystemresponses.
    Vir: The new phytologist [Elektronski vir]. - ISSN 1469-8137 (Vol. 214, iss. 2, Apr. 2017, str. 513-520)
    Vrsta gradiva - e-članek
    Leto - 2017
    Jezik - angleški
    COBISS.SI-ID - 5023142

    Povezava(-e):

    http://onlinelibrary.wiley.com/doi/10.1111/nph.14340/abstract
    DOI

Vnos na polico