Dryland mechanisms could widely control ecosystem functioning in a drier and warmer world

Nature Ecology & Evolution
By: , and 

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Abstract

Responses of terrestrial ecosystems to climate change have been explored in many regions worldwide. While continued drying and warming may alter process rates and deteriorate the state and performance of ecosystems, it could also lead to more fundamental changes in the mechanisms governing ecosystem functioning. Here we argue that climate change will induce unprecedented shifts in these mechanisms in historically wetter climatic zones, towards mechanisms currently prevalent in dry regions, which we refer to as ‘dryland mechanisms’. We discuss 12 dryland mechanisms affecting multiple processes of ecosystem functioning, including vegetation development, water flow, energy budget, carbon and nutrient cycling, plant production and organic matter decomposition. We then examine mostly rare examples of the operation of these mechanisms in non-dryland regions where they have been considered irrelevant at present. Current and future climate trends could force microclimatic conditions across thresholds and lead to the emergence of dryland mechanisms and their increasing control over ecosystem functioning in many biomes on Earth.

Publication type Article
Publication Subtype Journal Article
Title Dryland mechanisms could widely control ecosystem functioning in a drier and warmer world
Series title Nature Ecology & Evolution
DOI 10.1038/s41559-022-01779-y
Edition Online First
Year Published 2022
Language English
Publisher Nature
Contributing office(s) Southwest Biological Science Center
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