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- W2893714981 abstract "Abstract Amazon forests account for ~25% of global land biomass and tropical tree species. In these forests, windthrows (i.e., snapped and uprooted trees) are a major natural disturbance, but the rates and mechanisms of recovery are not known. To provide a predictive framework for understanding the effects of windthrows on forest structure and functional composition (DBH ≥10 cm), we quantified biomass recovery as a function of windthrow severity (i.e., fraction of windthrow tree mortality on Landsat pixels, ranging from 0%–70%) and time since disturbance for terra‐firme forests in the Central Amazon. Forest monitoring allowed insights into the processes and mechanisms driving the net biomass change (i.e., increment minus loss) and shifts in functional composition. Windthrown areas recovering for between 4–27 years had biomass stocks as low as 65.2–91.7 Mg/ha or 23%–38% of those in nearby undisturbed forests (~255.6 Mg/ha, all sites). Even low windthrow severities (4%–20% tree mortality) caused decadal changes in biomass stocks and structure. While rates of biomass increment in recovering vegetation were nearly double (6.3 ± 1.4 Mg ha − 1 year − 1 ) those of undisturbed forests (~3.7 Mg ha − 1 year − 1 ), biomass loss due to post‐windthrow mortality was high (up to −7.5 ± 8.7 Mg ha − 1 year − 1 , 8.5 years since disturbance) and unpredictable. Consequently, recovery to 90% of “pre‐disturbance” biomass takes up to 40 years. Resprouting trees contributed little to biomass recovery. Instead, light‐demanding, low‐density genera (e.g., Cecropia , Inga , Miconia, Pourouma, Tachigali, and Tapirira ) were favored, resulting in substantial post‐windthrow species turnover. Shifts in functional composition demonstrate that windthrows affect the resilience of live tree biomass by favoring soft‐wooded species with shorter life spans that are more vulnerable to future disturbances. As the time required for forests to recover biomass is likely similar to the recurrence interval of windthrows triggering succession, windthrows have the potential to control landscape biomass/carbon dynamics and functional composition in Amazon forests." @default.
- W2893714981 created "2018-10-05" @default.
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- W2893714981 date "2018-10-21" @default.
- W2893714981 modified "2023-10-14" @default.
- W2893714981 title "Windthrows control biomass patterns and functional composition of Amazon forests" @default.
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- W2893714981 doi "https://doi.org/10.1111/gcb.14457" @default.
- W2893714981 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30256494" @default.
- W2893714981 hasPublicationYear "2018" @default.
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