Variable Impacts of Climate Change on Blue Carbon

One Earth, Journal Year: 2020, Volume and Issue: 3(2), P. 195 - 211

Published: Aug. 1, 2020

Summary

Blue carbon provides opportunities to mitigate climate change while increasing ecosystem services for coastal communities, including adaptation; however, blue ecosystems are vulnerable change, leading uncertainties in the future efficacy of these ecosystems. In this review, we assess potential impacts on carbon. Despite uncertainties, sequestration is enhanced by landward migration habitats, maintenance sediment supply, restoration, and improved water quality. As an example, mangroves could result 1.5 Pg 2100. Mudflats, seaweed beds, swamp forests also contribute mitigation, although there large data gaps. Achieving full requires protection restoration facilitation changes distributions with actions that will deliver adaptation benefits. Conversely, worst-case squeeze scenario, losses 3.4 sequestered 2100 occur.

Language: Английский

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Storage, patterns and influencing factors for soil organic carbon in coastal wetlands of China

Global Change Biology, Journal Year: 2022, Volume and Issue: 28(20), P. 6065 - 6085

Published: June 30, 2022

Soil organic carbon (SOC) in coastal wetlands, also known as "blue C," is an essential component of the global C cycles. To gain a detailed insight into blue storage and controlling factors, we studied 142 sites across ca. 5000 km covering temperate, subtropical, tropical climates China. The wetlands represented six vegetation types (Phragmites australis, mixed P. australis Suaeda, single Spartina alterniflora, mangrove [Kandelia obovata Avicennia marina], tidal flat) three invaded by S. alterniflora (P. K. obovata, A. marina). Our results revealed large spatial heterogeneity SOC density top 1-m ranging 40-200 Mg ha-1 , with higher values mid-latitude regions (25-30° N) compared those both low- (20°N) high-latitude (38-40°N) regions. Vegetation type influenced density, having largest followed mangrove, Suaeda flat. increased 6.25 following invasion community but decreased 28.56 8.17 marina communities. Based on field measurements published literature, calculated total inventory 57 × 106 soil China's wetlands. Edaphic variables controlled content, chemical properties explaining variance content. Climate did not control content had strong interactive effect edaphic variables. Plant biomass quality traits were minor contributor regulating highlighting importance quantity OC inputs balance between production degradation within These findings provide new insights stabilization mechanisms sequestration capacity

Language: Английский

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Home‐based microbial solution to boost crop growth in low‐fertility soil

New Phytologist, Journal Year: 2023, Volume and Issue: 239(2), P. 752 - 765

Published: May 7, 2023

Soil microbial inoculants are expected to boost crop productivity under climate change and soil degradation. However, the efficiency of native vs commercialized in soils with different fertility impacts on resident communities remain unclear. We investigated differential plant growth responses synthetic community (SynCom) commercial growth-promoting rhizobacteria (PGPR). quantified colonization dynamic niche structure emphasize home-field advantages for inoculants. A SynCom 21 bacterial strains, originating from three typical agricultural soils, conferred a special advantage promoting maize low-fertility conditions. The root : shoot ratio fresh weight increased by 78-121% but only 23-86% PGPRs. This phenotype correlated potential robust positive interactions community. Niche breadth analysis revealed that inoculation induced neutral disturbance structure. even PGPRs failed colonize natural soil, they decreased overlap 59.2-62.4%, exacerbating competition. These results suggest microbes may serve as basis engineering microbiomes support food production widely distributed poor soils.

Language: Английский

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Archaeal and bacterial communities assembly and co-occurrence networks in subtropical mangrove sediments under Spartina alterniflora invasion

Environmental Microbiome, Journal Year: 2021, Volume and Issue: 16(1)

Published: May 3, 2021

Abstract Background Mangrove ecosystems are vulnerable due to the exotic Spartina alterniflora ( S. ) invasion in China. However, little is known about mangrove sediment microbial community assembly processes and interactions under invasion. Here, we investigated co-occurrence networks of archaeal bacterial communities along coastlines Fujian province, southeast Results Assembly overall was driven predominantly by stochastic processes, relative role stochasticity stronger for bacteria than archaea. Co-occurrence network analyses showed that structure more complex The keystone taxa often had low abundances (conditionally rare taxa), suggesting abundance may significantly contribute stability. Moreover, increased drift process (part processes), improved complexity stability, but decreased stability bacteria. This could be attributed influenced diversity dispersal ability, as well soil environmental conditions. Conclusions study fills a gap patterns both archaea ecosystem Thereby provides new insights plant on biogeographic distribution patterns.

Language: Английский

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Spartina alterniflora invasion controls organic carbon stocks in coastal marsh and mangrove soils across tropics and subtropics

Global Change Biology, Journal Year: 2021, Volume and Issue: 27(8), P. 1627 - 1644

Published: Jan. 15, 2021

Abstract Coastal wetlands are among the most productive ecosystems and store large amounts of organic carbon (C)—the so termed “blue carbon.” However, in tropics subtropics have been invaded by smooth cordgrass ( Spartina alterniflora ) affecting storage blue C. To understand how S. affects soil (SOC) stocks, sources, stability, their spatial distribution, we sampled soils along a 2500 km coastal transect encompassing tropical to subtropical climate zones. This included 216 samplings within three wetland types: marsh Phragmites australis two mangroves Kandelia candel Avicennia marina ). Using δ 13 C, C:nitrogen (N) ratios, lignin biomarker composition, traced changes SOC response invasion. The contribution ‐derived C up 40 cm accounts for 5.6%, 23%, 12% P. , K. A. communities, respectively, with corresponding change +3.5, −14, −3.9 t ha −1 . did not follow trend aboveground biomass from native invasive species, or vegetation types invasion duration (7–15 years). decreased increasing mean annual precipitation (1000–1900 mm) temperature (15.3–23.4℃). Edaphic variables marshes remained stable after invasion, hence, effects on content were absent. In mangrove wetlands, however, electrical conductivity, total N phosphorus, pH, active silicon main factors controlling stocks. Mangrove strongly impacted efforts needed focus restoring vegetation. By understanding mechanisms consequences sequestration can be predicted optimize developed.

Language: Английский

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Field-aged biochar enhances soil organic carbon by increasing recalcitrant organic carbon fractions and making microbial communities more conducive to carbon sequestration

Agriculture Ecosystems & Environment, Journal Year: 2022, Volume and Issue: 340, P. 108177 - 108177

Published: Sept. 12, 2022

Language: Английский

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Soil microbial metabolism on carbon and nitrogen transformation links the crop-residue contribution to soil organic carbon

npj Biofilms and Microbiomes, Journal Year: 2022, Volume and Issue: 8(1)

Published: April 1, 2022

Abstract The beneficial effect of crop residue amendment on soil organic carbon (SOC) stock and stability depends the functional response microbial communities. Here we synchronized metagenomic analysis, nuclear magnetic resonance plant- 15 N labeling technologies to gain understanding how metabolic processes affect SOC accumulation in responses differences supply from residues. Residue brought increases assemblage genes involved C-degradation profiles labile recalcitrant C compounds as well mineralization. mineralization were correlated with particulate mineral-associated pools, plant-derived aliphatic forms SOC. Thus, combined potential community transforms into persistent compounds, thereby increasing sequestration stable pools. This study emphasizes microbially mediated mechanisms by which affects soils.

Language: Английский

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Water Level Has Higher Influence on Soil Organic Carbon and Microbial Community in Poyang Lake Wetland Than Vegetation Type

Microorganisms, Journal Year: 2022, Volume and Issue: 10(1), P. 131 - 131

Published: Jan. 9, 2022

Although microorganisms play a key role in the carbon cycle of Poyang Lake wetland, relationship between soil microbial community structure and organic characteristics is unknown. Herein, high-throughput sequencing technology was used to explore effects water level (low high levels above table) vegetation types (Persicaria hydropiper Triarrhena lutarioriparia) on relationships were revealed. The results showed that had significant effect characteristics, total nitrogen, carbon, recombinant particle biomass higher at low table. A positive correlation noted content characteristics. Water type significantly affected bacterial fungal diversity, with exerting than type. impacts fungi bacteria. diversity evenness table, whereas an opposite trend among fungi. richness T. lutarioriparia P. soil. both structures, impact changes different but remained same soils. wetland negatively correlated positively diversity. Soil content, soluble C/N, factors affecting community. Acidobacteria, Alphaproteobacteria, Verrucomicrobia, Gammaproteobacteria, Eurotiomycetes microbiota wetland. Thus, sources limiting for bacteria wetlands (30%). Hence, provided theoretical basis understanding microbial-driven mechanism cycle.

Language: Английский

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Global dataset of soil organic carbon in tidal marshes

Scientific Data, Journal Year: 2023, Volume and Issue: 10(1)

Published: Nov. 11, 2023

Tidal marshes store large amounts of organic carbon in their soils. Field data quantifying soil (SOC) stocks provide an important resource for researchers, natural managers, and policy-makers working towards the protection, restoration, valuation these ecosystems. We collated a global dataset tidal marsh (MarSOC) from 99 studies that includes location, depth, site name, dry bulk density, SOC, and/or matter (SOM). The MarSOC 17,454 points 2,329 unique locations, 29 countries. generated general transfer function conversion SOM to SOC. Using this we estimated median (± absolute deviation) value 79.2 ± 38.1 Mg SOC ha-1 top 30 cm 231 134 1 m soils globally. This can serve as basis future work, may contribute incorporation ecosystems into climate change mitigation adaptation strategies policies.

Language: Английский

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A comparative analysis of the microbial communities and functional genes of the nitrogen cycling in mangroves of China, Indian and Malaysia

International Biodeterioration & Biodegradation, Journal Year: 2024, Volume and Issue: 190, P. 105767 - 105767

Published: March 11, 2024

Language: Английский

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