Meng Liu, Steven A Kannenberg, Josep Peñuelas, William R L Anderegg
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引用次数: 0
Abstract
Terrestrial ecosystems serve as a major carbon (C) sink, but the increasing frequency and intensity of drought threaten the C sink and ecological communities. A comprehensive understanding of the change in ecosystem productivity due to the direct effect versus the legacy effect of drought is still lacking. We quantify the magnitude change in terrestrial gross primary production (GPP) globally due to both direct and long-term legacy effects. We find that the direct effect causes significant GPP decreases in magnitude of -5.94% [-13.40%, -3.21%] per year, while the legacy effect-induced GPP change is weaker and non-significant at a global scale. Drought legacy effects, however, are detectable in dry sub-humid regions. The direct effect-induced change is highly correlated with that of the legacy effect, and rooting depth is a key driver for both. These findings demonstrate the current resilience of global ecosystems to drought but underscore the long-term vulnerability of dryland ecosystems.
期刊介绍：
Ecology Letters serves as a platform for the rapid publication of innovative research in ecology. It considers manuscripts across all taxa, biomes, and geographic regions, prioritizing papers that investigate clearly stated hypotheses. The journal publishes concise papers of high originality and general interest, contributing to new developments in ecology. Purely descriptive papers and those that only confirm or extend previous results are discouraged.
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