Precipitation pulse dynamics are not ubiquitous: A global meta-analysis of plant and ecosystem carbon- and water-related pulse responses

Le résumé fourni par la source

Ecosystem responses to precipitation pulses ("pulse responses") exert a large control over global carbon, water, and energy cycles.However, it is unclear how the timing and magnitude of pulse responses will vary across ecosystems as precipitation regimes shift under accelerating climate change.We conducted a global meta-analysis to quantify the magnitude and timing of plant and ecosystem carbon (Anet, NPP, GPP, Reco, Rbg) and water responses (ET, T, Y, gs) to 587 precipitation pulses.At relatively arid sites, water-related pulse responses were faster and larger than carbon-related pulse responses.However, at relatively mesic sites this relationship reversed (i.e., carbon-related pulse responses were faster and larger than water-related pulse responses).Larger pulse amounts delayed water-related responses while advancing carbon-related responses across both arid and mesic sites, revealing that carbon-related pulse responses may become more decoupled (coupled) from water-related pulse responses at wet (dry) sites under future precipitation intensification.

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