Carbon-sink potential of continuous alfalfa agriculture lowered by short-term nitrous oxide emission events

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: April 6, 2023

Alfalfa is the most widely grown forage crop worldwide and thought to be a significant carbon sink due high productivity, extensive root systems, nitrogen-fixation. However, these conditions may increase nitrous oxide (N2O) emissions thus lowering climate change mitigation potential. We used suite of long-term automated instrumentation satellite imagery quantify patterns drivers greenhouse gas fluxes in continuous alfalfa agroecosystem California. show that this system was large N2O source (624 ± 28 mg m2 y-1), offsetting ecosystem (carbon dioxide (CO2) methane (CH4)) by up 14% annually. Short-term events (i.e., hot moments) accounted for ≤1% measurements but 57% annual emissions. Seasonal daily trends rainfall irrigation were primary moments Significant coherence between satellite-derived photosynthetic activity suggested plant an important driver background Combined data can significantly lower carbon-sink potential agriculture.

Language: Английский

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Freshwater wetland restoration and conservation are long-term natural climate solutions

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 922, P. 171218 - 171218

Published: Feb. 27, 2024

Freshwater wetlands have a disproportionately large influence on the global carbon cycle, with potential to serve as long-term sinks. Many of world's freshwater been destroyed or degraded, thereby affecting carbon-sink capacity. Ecological restoration degraded is thus becoming an increasingly sought-after natural climate solution. Yet time required revert wetland from source sink remains largely unknown. Moreover, increased methane (CH4) and nitrous oxide (N2O) emissions might complicate benefit that may represent. We conducted meta-analysis evaluate benefits in terms net ecosystem greenhouse gas balance. Most studies (76 %) investigated peatlands (bogs, fens, peat swamps) northern hemisphere, whereas effects non-peat (freshwater marshes, swamps, riparian wetlands) remain unexplored. Despite higher CH4 emissions, most restored (77 all were sinks, (69 sources. Conversely, similar across restored, wetlands. When considering radiative forcings atmospheric lifetimes different gases, average for cooling effect after 525 years 141 The does, therefore, not meet timeframe set by Paris Agreement limit warming 2100. conservation protection should be prioritised over those ecosystems already play key role change mitigation.

Language: Английский

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Arsenic biogeochemical cycling association with basin-scale dynamics of microbial functionality and organic matter molecular composition

Water Research, Journal Year: 2024, Volume and Issue: 251, P. 121117 - 121117

Published: Jan. 8, 2024

Language: Английский

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Scale-dependent key drivers controlling methane oxidation potential in Chinese grassland soils

Soil Biology and Biochemistry, Journal Year: 2017, Volume and Issue: 111, P. 104 - 114

Published: April 13, 2017

Language: Английский

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Hydrocarbons in soils: Origin, composition, and behavior (Review)

Eurasian Soil Science, Journal Year: 2015, Volume and Issue: 48(10), P. 1076 - 1089

Published: Oct. 1, 2015

Language: Английский

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