Current status and emerging perspectives of coastal blue carbon ecosystems

Carbon Footprints, Journal Year: 2023, Volume and Issue: 2(3)

Published: July 21, 2023

Blue carbon ecosystems require conservation and restoration to maximize organic (CORG) sequestration ameliorate greenhouse gas emissions. Salt marshes, mangrove forests seagrass meadows are all autotrophic considered blue ecosystems. Macroalgae tidal flats currently not habitats. contribute globally climate change mitigation at local national scales, especially in the provision of other ecosystem goods services. Financial investment is constrained by large uncertainties CORG dynamics best practices restoration, rehabilitation conservation. Several key emerging perspectives include (1) fact that groundwater discharge dissolved a major pathway loss; (2) allochthonous inputs required achieve mass balance; (3) enhanced habitat connectivity biotic activities; (4) CH4 N2O emissions reduce potential; (5) destruction causes stock losses, but variable emissions; (6) sediment stocks increasing poles; (7) land-use land-cover changes (LULCC) drive Further research needed clarify applicability these perspectives.

Language: Английский

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Shifting relationships between SOC and molecular diversity in soils of varied carbon concentrations: Evidence from drained wetlands

Geoderma, Journal Year: 2023, Volume and Issue: 433, P. 116459 - 116459

Published: April 5, 2023

The molecular diversity of soil organic matter (SOM) is considered to be a critical factor influencing carbon (SOC) persistence, and found show positive relationship with SOC in many upland soils relatively low concentrations. However, the SOM diversity-SOC remains under-investigated high-SOC such as wetlands, which exhibit divergent accumulation mechanisms compared may induce contrasting shifts composition during drainage-induced changes. Here we utilized three wetlands (i.e., two fens bog) that encompassed wide range experienced decades artificial drainage investigate after drainage. was assessed based on pyrolysis products using pyrolysis–gas chromatography-mass spectrometry, its factors (including plant inputs, minerals, extracellular enzyme activity, etc.) were evaluated. We observed responses long-term investigated wetlands. While increased concentration low-SOC ≤ 60 mg g−1 soil) fen drainage, it did not change > regardless variations. inputs (e.g., root mass) drove these microbial processing rather than dominated increases diversity, thereby resulting decoupling soils. These findings suggest had non-linear In organic-rich peatlands, increase contrast Our study provides novel, diversity-based perspective understanding wetland stability context caused by increasing human activity and/or climate

Language: Английский

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Latitudinal responses of wetland soil nitrogen pools to plant invasion and subsequent aquaculture reclamation along the southeastern coast of China

Agriculture Ecosystems & Environment, Journal Year: 2024, Volume and Issue: 363, P. 108874 - 108874

Published: Jan. 12, 2024

Language: Английский

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Organic matter composition and stability in estuarine wetlands depending on soil salinity

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 945, P. 173861 - 173861

Published: June 12, 2024

Language: Английский

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Soil organic nitrogen content and composition in different wetland habitat types along the south-east coast of China

CATENA, Journal Year: 2023, Volume and Issue: 232, P. 107457 - 107457

Published: Aug. 11, 2023

Language: Английский

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Losses and destabilization of soil organic carbon stocks in coastal wetlands converted into aquaculture ponds

Global Change Biology, Journal Year: 2024, Volume and Issue: 30(9)

Published: Sept. 1, 2024

Coastal-wetlands play a crucial role as carbon (C) reservoirs on Earth due to their C pool composition and functional sink, making them significant for mitigating global climate change. However, the development utilization of wetland resources, many wetlands have been transformed into other land-use types. The current study focuses alterations in soil organic-C (SOC) coastal-wetlands following reclamation aquaculture ponds. We conducted sampling at 11 different along tropical temperate regions China coast. Each site included two community types, one with solely native species (Suaeda salsa, Phragmites australis Mangroves) an adjacent reclaimed pond. Across these locations we compared SOC stock, active OC fractions, physicochemical properties between coastal observed that uses, sites, interaction had effects its stock (p < .05). Reclamation significantly declined concentration depths 0-15 cm 15-30 by 35.5% 30.3%, respectively, also decreased 29.1% 37.9%, respectively. Similar trends were evident labile organic-C, dissolved microbial biomass concentrations .05), indicating C-destabilization losses from conversion. Soils ponds exhibited higher bulk density (BD; 11.3%) lower levels salinity (61.0%), water content (SWC; 11.7%), total nitrogen (TN) (23.8%) available-nitrogen (37.7%; p .05) than coastal-wetlands. Redundancy-analysis revealed pH, BD TN key variables most linked temporal variations fractions land use This provides theoretical basis rational management achievement environment-friendly society, preservation multiple service functions within ecosystems.

Language: Английский

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Chisel tillage and moderate nitrogen fertilization enhance maize straw decomposition through microbial and enzymatic synergy in wheat–maize system

Plant and Soil, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 6, 2025

Language: Английский

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Monitoring Wise Use of Wetlands During Land Conversion for the Ramsar Convention on Wetlands: A Case Study of the Contiguous United States of America (USA)

Published: March 16, 2025

Wetlands provide the world with important ecosystem services (ES) including carbon (C) storage. The Ramsar Convention (RC) is only global treaty on wetlands outside of United Nations (UN) 172 contracting parties across as 2025. goals convention are to promote wise use and conservation wetlands, designation suitable international importance, cooperation. problem that there no consensus for standard analysis, which needed ensure conservation. novelty this study methodology combines satellite-based land cover change analysis high-resolution spatial databases help understand in area over time identify potential hotspots C loss. Greenhouse gas (GHG) emissions from wetland conversions represent “transboundary” damages. Therefore, loss can be expressed through “realized” social cost (SC-CO2) a conservative estimate damages caused by dioxide (CO2) release. A case contiguous States America (USA) using raster within ArcGIS Pro showed key findings almost 53% was lost between 1780 1980, starting 894,880.7 km2 falling 422,388.2 1980. This net generated midpoint total soil (6.7 × 1013 kg C) associated costs value $11.4T (where T = trillion 1012, $ dollars, USD). Recent USA (2001–2021) revealed losses all states. newly demonstrated method rapid monitoring changes integrated into systems worldwide support RC concept.

Language: Английский

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Effects of landscape modification on coastal sediment nitrogen availability, microbial functional gene abundances and N2O production potential across the tropical-subtropical gradient

Environmental Research, Journal Year: 2023, Volume and Issue: 227, P. 115829 - 115829

Published: April 1, 2023

Language: Английский

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Reclamation of tidal flats to paddy soils reshuffles the soil microbiomes along a 53-year reclamation chronosequence: Evidence from assembly processes, co-occurrence patterns and multifunctionality

Environment International, Journal Year: 2023, Volume and Issue: 179, P. 108151 - 108151

Published: Aug. 15, 2023

Coastal soil microbiomes play a key role in coastal ecosystem functioning and are intensely threatened by land reclamation. However, the impacts of reclamation on microbial communities, particularly their assembly processes, co-occurrence patterns, multiple functions they support, remain poorly understood. This impedes our capability to comprehensively evaluate restore degraded Here, we investigated temporal dynamics bacterial fungal community multifunctionality along 53-year chronosequence paddy following from tidal flats. Reclamation flats soils resulted decreased β-diversity, increased homogeneous selection, network complexity robustness both but caused contrasting α-diversity response patterns them. also ecosystems, which was largely associated with α-diversity. Collectively, this work demonstrates that strongly reshaped at level mechanisms, interaction functionality level, highlights should be considered as factor restoring deteriorated

Language: Английский

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