دورية أكاديمية
The effect of repeated hurricanes on the age of organic carbon in humid tropical forest soil.
العنوان: | The effect of repeated hurricanes on the age of organic carbon in humid tropical forest soil. |
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المؤلفون: | Mayer AC; Department of Environmental Science, Policy and Management, University of California Berkeley, Berkeley, California, USA.; Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California, USA.; Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, USA., McFarlane KJ; Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California, USA., Silver WL; Department of Environmental Science, Policy and Management, University of California Berkeley, Berkeley, California, USA. |
المصدر: | Global change biology [Glob Chang Biol] 2024 Apr; Vol. 30 (4), pp. e17265. |
نوع المنشور: | Journal Article |
اللغة: | English |
بيانات الدورية: | Publisher: Blackwell Pub Country of Publication: England NLM ID: 9888746 Publication Model: Print Cited Medium: Internet ISSN: 1365-2486 (Electronic) Linking ISSN: 13541013 NLM ISO Abbreviation: Glob Chang Biol Subsets: MEDLINE |
أسماء مطبوعة: | Publication: Original Publication: Oxford, UK : Blackwell Science, 1995- |
مواضيع طبية MeSH: | Soil* , Cyclonic Storms*, Carbon ; Forests ; Minerals |
مستخلص: | Increasing hurricane frequency and intensity with climate change is likely to affect soil organic carbon (C) stocks in tropical forests. We examined the cycling of C between soil pools and with depth at the Luquillo Experimental Forest in Puerto Rico in soils over a 30-year period that spanned repeated hurricanes. We used a nonlinear matrix model of soil C pools and fluxes ("soilR") and constrained the parameters with soil and litter survey data. Soil chemistry and stable and radiocarbon isotopes were measured from three soil depths across a topographic gradient in 1988 and 2018. Our results suggest that pulses and subsequent reduction of inputs caused by severe hurricanes in 1989, 1998, and two in 2017 led to faster mean transit times of soil C in 0-10 cm and 35-60 cm depths relative to a modeled control soil with constant inputs over the 30-year period. Between 1988 and 2018, the occluded C stock increased and δ 13 C in all pools decreased, while changes in particulate and mineral-associated C were undetectable. The differences between 1988 and 2018 suggest that hurricane disturbance results in a dilution of the occluded light C pool with an influx of young, debris-deposited C, and possible microbial scavenging of old and young C in the particulate and mineral-associated pools. These effects led to a younger total soil C pool with faster mean transit times. Our results suggest that the increasing frequency of intense hurricanes will speed up rates of C cycling in tropical forests, making soil C more sensitive to future tropical forest stressors. (© 2024 The Authors. Global Change Biology published by John Wiley & Sons Ltd.) |
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معلومات مُعتمدة: | SCW1572 Office of Science; CA-B-ECO-7673-MS National Institute of Food and Agriculture; EAR-1331841 National Science Foundation Division of Earth Sciences; EAR-2012878 National Science Foundation Division of Earth Sciences; Lawrence Graduate Research Scholarship, Lawrence Livermore National Laboratory; DEB-1546686 National Science Foundation Division of Environmental Biology; DEB-1831952 National Science Foundation Division of Environmental Biology |
فهرسة مساهمة: | Keywords: 14C; Hurricane Hugo; Hurricane Maria; Luquillo Experimental Forest; radiocarbon; soil carbon age; transit times |
المشرفين على المادة: | 0 (Soil) 7440-44-0 (Carbon) 0 (Minerals) |
تواريخ الأحداث: | Date Created: 20240330 Date Completed: 20240401 Latest Revision: 20240401 |
رمز التحديث: | 20240401 |
DOI: | 10.1111/gcb.17265 |
PMID: | 38553935 |
قاعدة البيانات: | MEDLINE |
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