Decomposing the Tea Bag Index and finding slower organic matter loss rates at higher elevations and deeper soil horizons in a minerogenic salt marsh DOI Creative Commons

Satyatejas G. Reddy,

W. Reilly Farrell,

Fengrun Wu

et al.

Biogeosciences, Journal Year: 2025, Volume and Issue: 22(2), P. 435 - 453

Published: Jan. 24, 2025

Abstract. Environmental gradients can affect organic matter decay within and across wetlands contribute to spatial heterogeneity in soil carbon stocks. We tested the sensitivity of rates tidal flooding depth a minerogenic salt marsh using Tea Bag Index (TBI). bags were buried at 10 50 cm depths an elevation gradient subtropical Spartina alterniflora Georgia (USA). Plant animal communities properties characterized once, while replicate tea porewaters collected several times over 1 year. TBI faster than prior litterbag studies same marsh, largely due rapid green loss. Rooibos more comparable natural litter, potentially suggesting that is useful as standardized proxy tea. Decay was slowest higher elevations not consistently related other biotic (e.g., plants, crab burrows) or abiotic factors porewater chemistry), indicating local hydrology strongly affected loss rates. 32 %–118 % horizon cm. Rates fastest first 3 months slowed 54 %–60 both between 6 months. further 12 months, but this muted (17 %) compared (50 %). Slower with time unlikely stabilization factor, which similar decreased from demonstrates constrained by environmental conditions deeper rather composition highly litter. Overall, these patterns suggest hydrological setting, affects oxidant introduction reactant removal often overlooked decomposition studies, may be particularly important control on short term (3–12 months).

Language: Английский

Effects of soil labile carbon fractions and microbes on GHG emissions from flooding to drying in paddy fields DOI
Yi Xiao, Rong Huang, Zongjin Zhang

et al.

Journal of Environmental Sciences, Journal Year: 2025, Volume and Issue: unknown

Published: March 1, 2025

Language: Английский

Citations

0
What’s Going on Down There? Impacts of Long-Term Elevated CO2 and Community Composition on Components of Below-Ground Biomass in a Chesapeake Bay Saltmarsh DOI Creative Commons
Rachel Collin,

Bert G. Drake,

J. Patrick Megonigal

et al.

Hydrobiology, Journal Year: 2025, Volume and Issue: 4(1), P. 8 - 8

Published: March 19, 2025

Roots and rhizomes play diverse roles in the response of coastal wetland ecosystems to climate change through hydrobiogeomorphic biogeochemical processes. The accumulation living dead belowground biomass contributes significantly surface elevation gain, redox status root oxygen loss exudates, plant transport greenhouse gases atmosphere. Yet, responses global stressors are difficult measure remain poorly understood. Here, we report on individual components 12 years CO2 enrichment a temperate tidal marsh. In both community initially dominated by C3 species Schoenoplectus americanus another C4 Spartina patens, elevated increased total subtly altered depth distributions some components. community, this effect was result direct effects allocation, while any detect because changes relative abundance versus species. positively related S. stem density. Compared had higher rhizome deeper rhizomes. These results highlight importance composition functional traits understanding ecosystem- community-scale their potential impacts marsh elevation.

Language: Английский

Citations

0
Climate-induced shifts in sulfate dynamics regulate anaerobic methane oxidation in a coastal wetland DOI Creative Commons
Jaehyun Lee, Yerang Yang, Hojeong Kang

et al.

Science Advances, Journal Year: 2025, Volume and Issue: 11(17)

Published: April 23, 2025

Anaerobic methane oxidation (AMO) is a key microbial pathway that mitigates emissions in coastal wetlands, but the response of AMO to changing global climate remains poorly understood. Here, we assessed change brackish wetland using 5-year field manipulation warming and elevated carbon dioxide ( e CO 2 ). Sulfate (SO 4 2− )–dependent (S-DAMO) was predominant process at our study site due tidal inputs SO . However, dynamics responded differently treatments; reduced concentration by enhancing reduction, while increased regeneration. S-DAMO rates mirrored these trends, with decreasing stimulating them. These findings underscore potential alter soil activities through dynamics, highlighting need incorporate processes predictive models for more accurate representations dynamics.

Language: Английский

Citations

0
Analysis of the LCA-Emergy and Carbon Emissions Sustainability Assessment of a Building System with Coupled Energy Storage Modules DOI Creative Commons
Junxue Zhang,

Zhihong Pan,

Yingnan Li

et al.

Buildings, Journal Year: 2025, Volume and Issue: 15(2), P. 151 - 151

Published: Jan. 7, 2025

This paper uses a perspective of life cycle ecological emergy and carbon footprint to quantitatively verify the sustainable status building systems; it also employs neural network model predict analyze their long-term effects. The research results show that stages material production operation play major role in emissions entire system, changes an inverse trend. As system operates, greater loss consumption, environmental load rate (ELR) will gradually increase, sustainability parameter (ESI) decrease. integration energy storage modules significantly improves system. When calculated over five time periods (5 years, 10 20 30 50 years), overall emission reduction rates after adding module are 39.4%, 33.6%, 39.2%, 42.5%, 38.8% respectively, demonstrating has significant positive effect on study reveals efficiency impact throughout its cycle, providing scientific basis for optimizing design.

Language: Английский

Citations

0
Decomposing the Tea Bag Index and finding slower organic matter loss rates at higher elevations and deeper soil horizons in a minerogenic salt marsh DOI Creative Commons

Satyatejas G. Reddy,

W. Reilly Farrell,

Fengrun Wu

et al.

Biogeosciences, Journal Year: 2025, Volume and Issue: 22(2), P. 435 - 453

Published: Jan. 24, 2025

Abstract. Environmental gradients can affect organic matter decay within and across wetlands contribute to spatial heterogeneity in soil carbon stocks. We tested the sensitivity of rates tidal flooding depth a minerogenic salt marsh using Tea Bag Index (TBI). bags were buried at 10 50 cm depths an elevation gradient subtropical Spartina alterniflora Georgia (USA). Plant animal communities properties characterized once, while replicate tea porewaters collected several times over 1 year. TBI faster than prior litterbag studies same marsh, largely due rapid green loss. Rooibos more comparable natural litter, potentially suggesting that is useful as standardized proxy tea. Decay was slowest higher elevations not consistently related other biotic (e.g., plants, crab burrows) or abiotic factors porewater chemistry), indicating local hydrology strongly affected loss rates. 32 %–118 % horizon cm. Rates fastest first 3 months slowed 54 %–60 both between 6 months. further 12 months, but this muted (17 %) compared (50 %). Slower with time unlikely stabilization factor, which similar decreased from demonstrates constrained by environmental conditions deeper rather composition highly litter. Overall, these patterns suggest hydrological setting, affects oxidant introduction reactant removal often overlooked decomposition studies, may be particularly important control on short term (3–12 months).

Language: Английский

Citations

0