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Title: Drought drives rapid shifts in tropical rainforest soil biogeochemistry and greenhouse gas emissions

Journal Article · · Nature Communications

Climate change models predict more frequent and severe droughts in the humid tropics. How drought will impact tropical forest carbon and greenhouse gas dynamics is poorly understood. Here we report the effects of the severe 2015 Caribbean drought on soil moisture, oxygen, phosphorus (P), and greenhouse gas emissions in a humid tropical forest in Puerto Rico. Drought significantly decreases inorganic P concentrations, an element commonly limiting to net primary productivity in tropical forests, and significantly increases organic P. High-frequency greenhouse gas measurements show varied impacts across topography. Soil carbon dioxide emissions increase by 60% on slopes and 163% in valleys. Methane (CH4) consumption increases significantly during drought, but high CH4 fluxes post-drought offset this sink after 7 weeks. The rapid response and slow recovery to drought suggest tropical forest biogeochemistry is more sensitive to climate change than previously believed, with potentially large direct and indirect consequences for regional and global carbon cycles

Research Organization:
University of California, Berkeley, CA (United States)
Sponsoring Organization:
Office of Science (SC), Biological and Environmental Research (BER). Earth and Environmental Systems Science Division
Contributing Organization:
International Institute of Tropical Forestry, USDA Forest Service, University of Puerto Rico, LBNL, LLNL
Grant/Contract Number:
SC0010567
OSTI ID:
1484042
Report Number(s):
DOE-UCB-10567-1
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 102 works
Citation information provided by
Web of Science

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Cited By (15)

Soil Oxygen Limits Microbial Phosphorus Utilization in Humid Tropical Forest Soils journal November 2018
High-frequency greenhouse gas flux measurement system detects winter storm surge effects on salt marsh: XXXX journal October 2018
Humid Subtropical Forests Constitute a Net Methane Source: A Catchment‐Scale Study journal September 2019
Phosphorus rather than nitrogen enhances CO 2 emissions in tropical forest soils: Evidence from a laboratory incubation study journal January 2020
Disentangling drought and nutrient effects on soil carbon dioxide and methane fluxes in a tropical forest text January 2019
Disentangling drought and nutrient effects on soil carbon dioxide and methane fluxes in a tropical forest text January 2019
Interannual variation of terrestrial carbon cycle: Issues and perspectives journal November 2019
ENSO‐Influenced Drought Drives Methane Flux Dynamics in a Tropical Wet Forest Soil journal July 2019
Disentangling Drought and Nutrient Effects on Soil Carbon Dioxide and Methane Fluxes in a Tropical Forest journal November 2019
The role of soil redox conditions in microbial phosphorus cycling in humid tropical forests journal September 2019
Tropical forest soils serve as substantial and persistent methane sinks journal November 2019
Termites mitigate the effects of drought in tropical rainforest journal January 2019
Effects of Changes in Nitrogen Availability on Nitrogen Gas Emissions in a Tropical Forest During a Drought journal September 2019
Hot Spots and Hot Moments of Soil Moisture Explain Fluctuations in Iron and Carbon Cycling in a Humid Tropical Forest Soil journal November 2018
Drought and the interannual variability of stem growth in an aseasonal, everwet forest journal February 2019

Figures / Tables (4)