The increase of particle size shifts the biogeochemical cycle functions of mineral-associated microorganisms and weakens the mineral-associated organic carbon sink in mangrove soils

Applied and Environmental Microbiology, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 10, 2024

ABSTRACT Mineral-organic matter–microbe interactions greatly impact the biogeochemical processes and biodiversity in soils. An increasing trend of particle size (PS) mangrove soils has been observed because relative sea level rise. However, impacts PS increase on microbial functions carbon sink mineral-associated microcosms are exceedingly nebulous. This work showed a remarkable difference communities microorganisms (MMOs) various fractions. Heavy metal contents urease activity were factors that mostly driven MMO community variation different Large fraction attenuated stability according to co-occurrence network characteristics. The significantly ( P < 0.05) lowered gene abundances for input (e.g., fixation) raised loss aerobic respiration). Combined with significant decrease organic (MOC) large 0.05), this inferred could weaken MOC partially due function shift cycle. current indicated unhealthy changes storage soils, was significance as an indicator predicting function, especially stable form, such MOC, mangroves under ecological background climate migration. IMPORTANCE Carbon forms, (MOC), is crucial capabilities important players formation metabolism MOC. Therefore, future successions change value deeper understanding ecology. rise caused by global warming results soil (PS), which provides distinct MMOs responses content unknown. study aims reveal succession regulations their potential storages fractions, therefore widening our knowledge migration promoting research development mangrove.

Language: Английский

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Mid-infrared spectroscopy determines the provenance of coastal marine soils and their organic and inorganic carbon content

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 949, P. 174871 - 174871

Published: July 20, 2024

Vegetated coastal ecosystems (VCE), encompassing tidal marshes, mangroves, and seagrasses, serve as significant 'blue' carbon (C) sinks. Improving our understanding of VCE soils their spatial temporal dynamics is essential for conservation efforts. Conventional methods to characterise the provenance measure total organic (TOC) inorganic (TIC) contents are cumbersome expensive. We recorded mid-infrared (MIR) spectra measured TOC TIC content 323 subsamples across consistent depths from 106 soil core samples. Using each VCE, we determined mineral composition by depth. then used a regression tree algorithm, cubist, model contents. rigorously validated models test performance with 10-fold cross-validation, bootstrapping, separate random dataset. Our analysis revealed distinct mineralogical MIR signatures in that correlated position within seascape. The showed decreased clay minerals increased quartz carbonate distance freshwater inputs. mineralogy marsh mangrove differed depth, showing larger absorptions due weakening organics absorptions. seagrass remained same cubist estimate were accurate (Lin's concordance correlation, ρ

Language: Английский

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Interconnectivity can be as important as habitat type in explaining carbon stocks in the coastal lagoons of arid regions

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 951, P. 175504 - 175504

Published: Aug. 13, 2024

Language: Английский

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Freeze–thaw processes correspond to the protection–loss of soil organic carbon through regulating pore structure of aggregates in alpine ecosystems

SOIL, Journal Year: 2024, Volume and Issue: 10(2), P. 859 - 871

Published: Dec. 4, 2024

Abstract. Seasonal freeze–thaw processes alter soil formation and lead to changes in structure of alpine ecosystems. Soil aggregates are basic structural units play a crucial role organic carbon (SOC) protection microbial habitation. However, the impact seasonal on pore their SOC fractions have been overlooked. This study characterized unstable freezing period, stable frozen thawing period thawed typical ecosystems via dry-sieving procedure, X-ray computed tomography scanning elemental analysis. The results showed that networks 0.25–2 mm were more vulnerable than those >2 aggregates. process promoted >80 µm pores total carbon, particulate mineral-associated contents high dropped dramatically demonstrating was positively associated with accumulation, while loss featured early stage thawing. vertical distribution uniform other periods. Pore equivalent diameter most important characteristic influencing In accumulation might be enhanced by pores. <15 correlated concentration. Our revealed induced could contribute

Language: Английский

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Impacts of Spartina alterniflora invasion on soil carbon components of particulate and mineral-associated organic matter and soil organic matter mineralization in estuarine wetlands

Applied Soil Ecology, Journal Year: 2024, Volume and Issue: 206, P. 105857 - 105857

Published: Dec. 30, 2024

Language: Английский

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Spatial Differentiation of Mangrove Aboveground Biomass and Identification of Its Main Environmental Drivers in Qinglan Harbor Mangrove Nature Reserve

Sustainability, Journal Year: 2024, Volume and Issue: 16(19), P. 8408 - 8408

Published: Sept. 27, 2024

In the Bamen Bay area of Qinglan Harbor Mangrove Provincial Nature Reserve in Wenchang, Hainan Province, China, mangrove aboveground biomass (AGB) was estimated using high-resolution UAV ortho-imagery and LiDAR data. The spatial distribution characteristics AGB were studied global Moran’s I index hotspot analysis. Optimal geographic detectors regression models employed to analyze relationship between key environmental factors. results indicate that (1) average study 141.22 Mg/ha, with significant variation. High values concentrated southwestern northeastern regions, while low mainly found central southeastern regions. (2) Plant species, water pH, soil total potassium, salinity, dissolved oxygen, elevation, organic matter, phosphorus, nitrogen identified as major factors influencing AGB. interaction either bifactor enhancement or nonlinear enhancement, showing a significantly higher impact compared single (3) Comprehensive model reveal primary factor affecting AGB, followed by pH having least impact. Factors positively correlated promoted growth, elevation negatively affected inhibiting accumulation. findings provide critical insights can guide targeted conservation efforts management strategies aimed at enhancing ecosystem health resilience, particularly focusing on areas for potential improvement addressing complex interactions among

Language: Английский

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