Prolonged Storage of Bound Organic Carbon in Wetland but Not Upland Soils: A 13C and 14C Perspective DOI Creative Commons
Tian Ma,

Yiyun Wang,

Guohua Dai

et al.

Geophysical Research Letters, Journal Year: 2024, Volume and Issue: 52(1)

Published: Dec. 28, 2024

Abstract Protection by metal (hydr) oxides is one of the key mechanisms for long‐term stabilization soil organic carbon (SOC). However, source and turnover (metal‐) bound (OC) in soils are poorly constrained. Here we present first large‐scale study on 13 C 14 characteristics OC 15 wetland upland profiles. We find that has similar δ as SOC, suggesting no preference plant‐ or microbe‐derived carbon. Δ more negative than SOC but not mineral soils, decreases with increasing reactive minerals. Hence, contrast to conventional assumption, better preserved relative wetlands high contents metals. Our finding highlights dynamic exchange calls a recognition metals stabilizing wetlands.

Language: Английский

Potential retention of dissolved organic matter by soil minerals during wetland water-table fluctuations DOI
Simin Wang, Ting Liu, Erxiong Zhu

et al.

Water Research, Journal Year: 2024, Volume and Issue: 254, P. 121412 - 121412

Published: March 3, 2024

Language: Английский

Citations

17
Metallic protection of soil carbon: divergent drainage effects in Sphagnum vs. non-Sphagnum wetlands DOI Creative Commons

Chengzhu Liu,

Yunpeng Zhao,

Lixiao Ma

et al.

National Science Review, Journal Year: 2024, Volume and Issue: 11(11)

Published: May 20, 2024

ABSTRACT The established paradigm assumes that drainage may decrease the vast soil organic carbon (SOC) reservoir in global wetlands. Yet can also promote SOC stabilization by fostering accrual of metal-bound (bound OC) upon oxygen exposure. Here, this emergent mechanism is tested for first time at a regional scale, using literature data and nationwide, pairwise survey drained wetlands across China. We show long-term (15–55 years) largely increased metallic protection OC%) non-Sphagnum wetlands, but consistently decreased bound OC% Sphagnum following replacement ‘rust engineer’ herbaceous plants. Improved stock estimates based on 66 profiles reveal OC increases compensate loss unbound components with substantial reactive metals. Metallic wetland hence widespread overlooked heavily influenced vegetational shifts. Incorporating novel into models will improve prediction dynamics under shifting hydrological regimes.

Language: Английский

Citations

10
Enhanced microbial contribution to mineral-associated organic carbon accrual in drained wetlands: Beyond direct lignin-iron interactions DOI

Chengzhu Liu,

Simin Wang, Yunpeng Zhao

et al.

Soil Biology and Biochemistry, Journal Year: 2023, Volume and Issue: 185, P. 109152 - 109152

Published: Aug. 18, 2023

Language: Английский

Citations

20
Contrasting stocks and origins of particulate and mineral-associated soil organic carbon in a mangrove-salt marsh ecotone DOI Creative Commons
Prakhin Assavapanuvat, Joshua L. Breithaupt,

Kevin M. Engelbert

et al.

Geoderma, Journal Year: 2024, Volume and Issue: 446, P. 116904 - 116904

Published: May 7, 2024

The global warming-driven poleward expansion of mangrove habitats (e.g., Avicennia germinans and Rhizophora mangle) into temperate salt marshes Spartina alterniflora Juncus roemerianus) has been shown to alter coastal soil organic carbon (SOC) storage. However, the taxa-specific consequences this vegetation shift on origin size SOC sub-fractions (particulate OC (POC); mineral-associated (MAOC); reactive iron-associated (FeR-MAOC)) remain largely unexplored. In study, we used a particle size-based fractionation method compare quantity δ13C composition bulk each in cores collected from Apalachicola Bay barrier islands Florida, USA, highest latitude where monospecific communities all four aforementioned plants co-occur. Depth-dependent variation clearly showed replacement S. by mangroves, as well reciprocal substitutions J. roemerianus, probably driven changes wetland elevation. Higher burial rates suggested that soils were principally developed deposition. contrast, comparatively lower but higher stocks marsh illustrated subsurface input roots. POC was primarily derived contemporary plant detritus; its concentration (58.8 ± 9.0 % SOC) relative mangroves (38.4 6.0 SOC). MAOC content did not vary across (53.5 10.9 SOC), originated microbially-transformed pre-existing plants. FeR-MAOC essentially absent R. mangle (2.9 3.6 while representing minor fraction three other (7.8 7.0 more like present-day surface plants, highlighting situ formation their active oxidizing rhizospheres.

Language: Английский

Citations

5
Understanding the mechanisms and potential pathways of soil carbon sequestration from the biogeochemistry perspective DOI

Xiaojuan Feng,

Guohua Dai,

Ting Liu

et al.

Science China Earth Sciences, Journal Year: 2024, Volume and Issue: 67(11), P. 3386 - 3396

Published: Aug. 28, 2024

Language: Английский

Citations

5
Higher dynamic and turnover yet enhanced organic carbon burial in Spartina alterniflora sediments: A case study in a temperate coastal wetland DOI
Yueming Wu, Binghe Xu,

Danqing Sun

et al.

CATENA, Journal Year: 2025, Volume and Issue: 249, P. 108701 - 108701

Published: Jan. 10, 2025

Language: Английский

Citations

0
Reduction of iron-organic carbon associations shifts net greenhouse gas release after initial permafrost thaw DOI Creative Commons
Eva Voggenreiter, Laurel K. ThomasArrigo, Joachim Kilian

et al.

Soil Biology and Biochemistry, Journal Year: 2025, Volume and Issue: unknown, P. 109735 - 109735

Published: Jan. 1, 2025

Language: Английский

Citations

0
Iron‐Driven Fast Decomposition of Soil Carbon Under Periodic Anoxia DOI
Ting Liu, Xiaoliang Wang, Simin Wang

et al.

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(4)

Published: April 1, 2025

Soil organic carbon (SOC) decomposition underpins soil-atmosphere exchange and is regulated by climate change-mediated variations in soil redox conditions. Periodic anoxia, commonly occurring following precipitation, flooding, erosion events, assumed to preserve SOC. Yet, water saturation may also increase SOC relative unsaturated conditions, contradictory findings among previous studies remain unexplained. Here, using incubation experiments on 20 soils collected across a 24° latitude gradient China, we show that 70% of the showed higher or similar anoxic rate compared oxic treatment, indicating fast loss under relatively short anoxia. Methane production was far lower than CO2 due presence alternative terminal electron acceptors (TEAs). Variation TEAs microbial community shows primarily driven iron (Fe) reduction, which accounted for up 90% production. Meanwhile, positive relationships water-extractable (OC), hydrochloric acid-extractable ferrous Fe, abundance Fe-reducing prokaryotes, suggest release readily metabolized substrates Fe reduction. This provided metabolism potentially led OC protected (Fe-bound OC; slow-cycling pool conditions). Mass balance calculation confirms Fe-bound mostly elevated magnitude, random forest modeling indicates rich reducible SOC, prokaryotes most likely experience periodic Overall, our demonstrate important pathway stimulate intense hydrologic regimes, particularly

Language: Английский

Citations

0
Emerging investigator series: preferential adsorption and coprecipitation of permafrost organic matter with poorly crystalline iron minerals DOI Creative Commons
Eva Voggenreiter, Philippe Schmitt‐Kopplin, Laurel K. ThomasArrigo

et al.

Environmental Science Processes & Impacts, Journal Year: 2024, Volume and Issue: 26(8), P. 1322 - 1335

Published: Jan. 1, 2024

This study reports the decrease in iron-bound organic carbon quantity and change its composition thawing permafrost soils, with implications for bioavailability of dissolved pool.

Language: Английский

Citations

3
Redox control on rhizosphere priming in wetlands DOI
Peter Mueller, J. Patrick Megonigal

Nature Geoscience, Journal Year: 2024, Volume and Issue: 17(12), P. 1209 - 1217

Published: Dec. 1, 2024

Language: Английский

Citations

3