Microplastics as novel sedimentary particles in coastal wetlands: A review

Marine Pollution Bulletin, Journal Year: 2020, Volume and Issue: 161, P. 111739 - 111739

Published: Oct. 19, 2020

Language: Английский

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The role of mangrove fine root production and decomposition on soil organic carbon component ratios

Ecological Indicators, Journal Year: 2021, Volume and Issue: 125, P. 107525 - 107525

Published: March 9, 2021

Mangrove fine roots are an important contributor to soil organic matter (SOC), yet how their production and decomposition affect SOC accumulation across the sea-land gradient is still elusive. This study aimed investigate influencing path of biotic abiotic factors root dynamics on component ratios involving particulate carbon (POC)/SOC, dissolved (DOC)/SOC, microbial biomass carbon(MBC)/SOC. Based upon sequential coring litter bag method, production, mangrove were investigated. The turnover rate increased from 90.9 g·m−2 510.9 0.44 yr−1 1.49 respectively. After one year decomposition, 69.5–80.8% 58.3–69.2% low-order high-order remained, Decomposition rates both significantly slower in landward zone than seaward zones. Redundancy analysis (RDA) illustrated that vegetation salinity respectively main affecting they explained 91.2% decomposition. Stepwise regression indicated was mainly influenced by while negatively affected salinity. POC 20.13 t·ha−1 58.71 78.42 139.01 DOC/SOC MBC/SOC reduced 0.33 0.24 0.55 gradient. RDA results major control ratio components among roots, explaining 90.9% changes. structural equation modeling, coefficient POC/SOC 0.914 (P < 0.001), indicating drive accumulation. Nevertheless, played a minor role change. information gained this will facilitate policy decisions concerning restoration forests China.

Language: Английский

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Importance of mangrove plantations for climate change mitigation in Bangladesh

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(12), P. 3331 - 3346

Published: March 10, 2023

Mangroves have been identified as blue carbon ecosystems that are natural sinks. In Bangladesh, the establishment of mangrove plantations for coastal protection has occurred since 1960s, but may also be a sustainable pathway to enhance sequestration, which can help Bangladesh meet its greenhouse gas (GHG) emission reduction targets, contributing climate change mitigation. As part Nationally Determined Contribution (NDC) under Paris Agreement 2016, is committed limiting GHG emissions through expansion plantations, level removal could achieved not yet estimated. The mean ecosystem stock 5-42 years aged (average age: 25.5 years) was 190.1 (±30.3) Mg C ha-1 , with stocks varying regionally. biomass 60.3 (±5.6) and soil 129.8 (±24.8) in top 1 m 43.9 added after plantation establishment. Plantations at age 5 42 52% calculated reference site (Sundarbans mangroves). Since 1966, 28,000 ha established east Sundarbans accumulated approximately 76,607 year-1 sequestration 37,542 soils, totaling 114,149 . Continuation current success rate would sequester an additional 664,850 by 2030, 4.4% Bangladesh's 2030 target from all sectors described NDC, however, mitigation most effective 20 Higher levels investment higher contribute up 2,098,093 2030.

Language: Английский

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Maximizing blue carbon stocks through saltmarsh restoration

Frontiers in Marine Science, Journal Year: 2023, Volume and Issue: 10

Published: March 30, 2023

Political discourse around coastal wetland restoration and blue carbon management strategies has increased in the past decade, yet storage neither been a reason for restoration, nor criterion to measure success of current saltmarsh schemes UK. To maximise climate change mitigation through knowledge on key drivers stock variability is required. We use restored saltmarshes similar age, paired with adjacent natural marshes as references, identify stocks following managed realignment within an estuary southeastern England. From surficial soil cores (top 30 cm), we measured alongside environmental characteristics. Carbon between sites were after ~ years when above mean high water neap (MHWN) tidal levels. Elevated marsh platforms likely provide suitable conditions development mature plant communities associated greater capture production organic carbon. The site at Tollesbury (Essex, UK) had 2-fold lower than other estuary. attribute this site’s low position frame, below MHWN levels, coupled sediment supply dominance pioneer communities. As anticipated become important facet recommend that levels are selected or preference given coastlines may rapidly elevate MHWN. Alternatively, elevation could be artificially raised prior realignment. Restoration aiming should also encourage establishment species (e.g., Atriplex portulacoides our study) enhance stocks. However, overall goal ought carefully considered trade-offs ecosystem services ensue if alone pursued.

Language: Английский

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Decadal Trends in Surface Elevation and Tree Growth in Coastal Wetlands of Moreton Bay, Queensland, Australia

Estuaries and Coasts, Journal Year: 2024, Volume and Issue: 47(7), P. 1955 - 1971

Published: Jan. 19, 2024

Abstract Coastal wetlands surrounding urban environments provide many important ecosystem services including protection from coastal erosion, soil carbon sequestration and habitat for marine terrestrial fauna. Their persistence with sea-level rise depends upon their capacity to increase surface elevation at a rate comparable the of rise. Both sediment organic matter plant growth contribute gains in elevation, but importance these components varies among sites variation climate over long time scales, which monitoring is seldom available. Here, we analysed accretion mangrove tree 15 years Moreton Bay, Queensland, Australia, period that spans El Niño/La Niña (ENSO) cycle, strongly influences rainfall sea level region. Piecewise structural equation models were used assess effects biotic (tree growth, cover bioturbation by invertebrates) environmental factors on annual increments throughout this period. Our model mangroves identified both positively influenced rainfall, was not, thus, higher levels compaction profile high rainfall/high inferred. In contrast, our saltmarsh found gains. Declines species composition mangrove, loss occurring forests dominated Avicennia marina compared those proportion Rhizophora stylosa . Decadal-scale ENSO affected trends more conditions than although (mangrove bioturbation) observed. Further research into tipping points extreme events (either La or Niño low levels) will help clarify future distribution within Bay.

Language: Английский

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