Peatland pools are tightly coupled to the contemporary carbon cycle

Global Change Biology, Journal Year: 2023, Volume and Issue: 30(1)

Published: Nov. 3, 2023

Abstract Peatlands are globally important stores of soil carbon (C) formed over millennial timescales but at risk destabilization by human and climate disturbance. Pools ubiquitous features many peatlands can contain very high concentrations C mobilized in dissolved particulate organic form as the greenhouses gases dioxide (CO 2 ) methane (CH 4 ). The radiocarbon content ( 14 C) these aquatic forms tells us whether pool is generated contemporary primary production or from destabilized released deep peat layers where it was previously stored for millennia. We present novel stable (δ 13 isotope data 97 samples across six peatland locations United Kingdom with a focus on CO . Our observations cover two distinct types: natural pools those ditch blocking efforts to rewet (restoration pools). were dominated C, majority (~50%–75%) all being younger than 300 years old. Both types readily transform decompose water column emit atmosphere, though mixing atmosphere subsequent emissions more evident pools. results show little evidence deep, old restoration pools, despite presence substantial millennial‐aged surrounding peat. One possible exception CH ebullition (bubbling), our showing that be emitted via this pathway. suggest effective preventing release rewetted export.

Language: Английский

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Integrated water management practice in tropical peatland agriculture has low carbon emissions and subsidence rates

Heliyon, Journal Year: 2024, Volume and Issue: 10(5), P. e26661 - e26661

Published: Feb. 21, 2024

Hydrological management in the use of peatland for agriculture is backbone its sustainability and a critical factor climate change mitigation. This study evaluates application an integrated water practice known as "Water Management Trinity" (WMT), implemented since 1986 on coconut plantation eastern coast Sumatra, relation to CO2 emissions subsidence rates. The WMT integrates canals, dikes, dams with gates regulate levels both agronomy preservation peat soil. has successfully regulated maintained average yearly table depth -45 -51 cm below surface. methodology involved closed chamber method measuring soil flux using portable Infrared Gas Analyzer, conducted weekly over six-month period cover dry rainy season at bi-modal condition. Subsidence measurements have been ongoing from 2022. results show bare heterotrophic respiration 7.77 t C-CO2 ha-1 yr-1, while plantations 7.99 similar mineral soils. Autotrophic leads overestimation accounts 212-424% total emissions. cumulative 2022 -56.3 cm, rise +0.8 2022, indicating flattening rate subsidence. characterized by increase bulk density surface 0.072 0.144 gr/cm3, approximately 81% being due compaction. statistical analysis found no relationship between emissions, that cannot be used predictor In summary, promising future when managed sustainably hydrological system.

Language: Английский

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Atmospheric emissions, processes, and impacts of tropical peatland fire haze in Equatorial Asia: A review

Atmospheric Environment, Journal Year: 2024, Volume and Issue: 331, P. 120575 - 120575

Published: May 10, 2024

Language: Английский

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Impacts of different intensities of commercial Sphagnum moss extraction on CO2 fluxes in a northern Patagonia peatland

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 964, P. 178566 - 178566

Published: Jan. 21, 2025

Language: Английский

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Bioenergy and Waste

Green energy and technology, Journal Year: 2025, Volume and Issue: unknown, P. 461 - 544

Published: Jan. 1, 2025

Language: Английский

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