Evaluating Carbon Stocks in a Tropical Urban Mangrove Forest, Suva, Fiji DOI Open Access

Vanessa Michael

Published: Jan. 1, 2023

Fiji's volcanic islands are home to the third largest mangrove ecosystem in South Pacific.These hardy trees that inhabit land-sea interface provide important services, including coastal protection from storm surges, water regulation and nutrient cycling, an source of food, fuel, medicine.Mangroves also very efficient at sequestering storing large quantities carbon.This study combined field observation methods with spectral information satellite imagery estimate carbon stocks forests along Veisari River Delta, near Suva, southeastern Viti Levu, Fiji.The forest was dominated by a single species, bruguiera gymnorrhiza, smaller numbers rhizophora.spp.Despite species uniformity, there significant difference structure disturbance levels two transects measured for this study.The young Transect 1 had higher tree density (average DBH 5.2 cm) estimated biomass 79.3 Mg C/ha, while mature, older 2, lower average (23.2 recorded 323.7 C/ha above belowground biomass.The overall content site 120 C/ha.The image revealed high NDVI values (0.92-0.94) both (and surrounding deltaic forests), indicating almost closed canopy cover across all plots.The comparison data analysis did not produce strong correlative relationship derive model predicting ecosystem.Further research larger sample sizes would more comprehensive assessment biophysical attributes how age impacts estimates forest.The inclusion soil measurements complete picture storage capacity site.The results suggest urban ecosystems can be extraordinarily resilient highly carbon, especially old growth minimal harvesting.

Language: Английский

Increased Mineral‐Associated Organic Carbon and Persistent Molecules in Allochthonous Blue Carbon Ecosystems DOI Open Access
Yuan Li, Chuancheng Fu, Chenglong Ye

et al.

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(1)

Published: Jan. 1, 2025

ABSTRACT Coastal wetlands contain very large carbon (C) stocks—termed as blue C—and their management has emerged a promising nature‐based solution for climate adaptation and mitigation. The interactions among sources, pools, molecular compositions of soil organic C (SOC) within ecosystems (BCEs) remain elusive. Here, we explore these along an 18,000 km long coastal line salt marshes, mangroves, seagrasses in China. We found that mineral‐associated (MAOC) is enriched BCEs dominated by allochthonous inputs abundant active minerals, leading to increased proportion persistent molecules. Specifically, soils with (> 50%) are characterized substantial contribution MAOC 70%) total SOC notable preservation lipids (36%) across seagrasses. burial particles, derived from external sources such rivers or tidal influxes, facilitates the formation stable through binding mineral surfaces occlusion microaggregates. proportions particulate (POC) important predictors matter. Lipid composition decrease POC autochthonous increase. These findings provide new insights into coupled control over sequestration BCEs, emphasizing role inputs, components.

Language: Английский

Citations

1
Asynchronous Methane and Carbon Dioxide Fluxes Drive Temporal Variability of Mangrove Blue Carbon Sequestration DOI Creative Commons
Xudong Zhu,

Jingke Chen,

Lichun Li

et al.

Geophysical Research Letters, Journal Year: 2024, Volume and Issue: 51(11)

Published: June 4, 2024

Abstract The climate benefit of blue carbon sequestered by mangrove forests can be partially offset CH 4 emission, but this is rarely assessed using multi‐year high‐frequency measurements. Here, four‐year eddy covariance measurements were used to examine temporal patterns flux and its (i.e., reduced benefit) in a subtropical estuarine China. We found both diel seasonal fluxes mainly driven soil temperature tidal activities, showing greater nighttime emission. On average, one‐tenth CO 2 uptake was emission the sustained‐flux global warming potential metric at 20‐year time horizon, while could vary over an order magnitude due asynchronous across cycles. These results highlight significant contribution budget importance variations assessing mangrove's benefit.

Language: Английский

Citations

5
Crab bioturbation alters the community assemblies of abundant and rare bacteria on an intertidal wetland in the Yellow River estuary DOI Creative Commons
Zhikang Wang,

Yongqi Wang,

Jisong Yang

et al.

Frontiers in Microbiology, Journal Year: 2025, Volume and Issue: 16

Published: Jan. 31, 2025

Introduction Revealing assembly patterns of abundant and rare bacteria is pivotal for comprehending the responses soil bacterial community to environmental changes. Crabs exert significant impacts on environments through their frequent burrowing activities in intertidal wetlands. However, there remains a paucity knowledge regarding influencing mechanism crab bioturbation assemblies bacteria. Methods We delved into structures, co-occurrence networks, processes within crab-bioturbated soils (encompassing burrows mounds) across an wetland. Results discussion The compositions diversities subcommunities were notably altered soils. Moreover, network analysis unveiled that substantially modified interaction bacteria, whereas its influence was comparatively minor. Furthermore, we discovered primarily influenced by stochastic processes, while subcommunity collectively shaped both deterministic processes. In conclusion, our study elucidates which mediates distinct subcommunities, underscores importance considering when evaluating ecological functions

Language: Английский

Citations

0
Ecosystem carbon stock variation along forest stand ages: insight from eastern coast mangrove ecosystem of India DOI Creative Commons
M. R. Panda,

Bikash Ranjan Dash,

Sudam C. Sahu

et al.

Ecological Processes, Journal Year: 2025, Volume and Issue: 14(1)

Published: Feb. 6, 2025

Abstract Background The mangrove ecosystem has the highest carbon sink potential which significantly contributes to bringing neutrality. Understanding stock dynamics along age of forest stands in is significance for managing forests and their accumulation. This study aimed estimate structural attributes, biomass total (TECS) old natural (age > 50 years) young planted ~ 20 at Bichitrapur Mangrove Reserve Forest eastern coast India. We also attempted understand interrelationship soil properties forests. To achieve results, twenty random plots were established (size: m × 25 m) suitable allometric equations with species-specific wood density values used stock. Results Altogether, 29 plant species (18 exclusive 11 associate species) recorded. mean (± SE) organic (at 30 cm depth) 165.31 ± 20.89 t ha −1 40.20 1.24 C stands, 586.12 56.74 49.68 2.39 respectively. Among species, Avicennia marina contributed vegetation both (59.72 262.28 respectively), followed by officinalis (35.05 ) Sonneratia apetala (26.09 stand alba (169.28 (115.58 stand. TECS was 235.62 27.34 . contribution 63% 37% stand, whereas it 83% 17%, correlation analyses revealed that height ( r = 0.87), basal area 0.99), nitrogen 0.76), potassium 0.78), 0.80) positively correlated p < 0.01. Conclusions Our results demonstrate store substantially high than implying role determining storage ecosystems.

Language: Английский

Citations

0
Groundwater carbon exports dominate dissolved carbon budgets in a seagrass meadow karstic bay (Adriatic Sea, Croatia) DOI
Yu Chen, Jianan Liu, Neven Cukrov

et al.

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 133391 - 133391

Published: April 1, 2025

Language: Английский

Citations

0
Stand age-related effects of mangrove on archaeal methanogenesis in sediments: Community assembly and co-occurrence patterns DOI
Lingfang Ni, Jiaping Wu, Hongyue Dang

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 954, P. 176596 - 176596

Published: Sept. 30, 2024

Language: Английский

Citations

2
Impacts of intensive smooth cordgrass removal on net ecosystem exchange in a saltmarsh-mangrove ecotone of Southeast China DOI
Xudong Zhu,

Minghao Ma,

Lichun Li

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 934, P. 173202 - 173202

Published: May 14, 2024

Language: Английский

Citations

1
Carbon and Nitrogen Deposits of Macroalgal Origin on a Tropical Seagrass Meadow DOI Creative Commons
Mohammad Rozaimi, Nur Farah Ain Zainee,

Chandran Raynusha

et al.

Ecosystem Health and Sustainability, Journal Year: 2024, Volume and Issue: 10

Published: Jan. 1, 2024

How would the biodiversity of macroalgae modify carbon (C) and nitrogen (N) stocks within a blue habitat? We addressed this knowledge gap by quantifying biomass macroalgal origins across seascape seagrass meadow. Such information is warranted due to paucity data on deposits that function as allochthonous inputs into an ecosystem’s pool organic matter. Macroalgae were collected from Merambong shoal (Johor, Malaysia) in December 2020 February 2021. C N analyses performed matter, measurements upscaled represent estimates. Stocks origin meadow estimated at 10.71 ± 1.3 Mg 0.75 0.11 N. The was heterogeneous, which similarly reflected taxa-specific variability up 44.7% 4.9% highest cumulative contributed members Ulvaceae for Corallinaceae Lithophyllaceae among calcifying species. morphology habit 35 species found provided indicators their autochthonous versus nature based benthic or drifting tendencies. Predictors factored indices not evident, although Evenness index partially explained it spatial level. model still able pinpoint clusters hotspots meadow, allowing management measures protection reserves while mitigating release excess

Language: Английский

Citations

1
Utilities of environmental radioactivity tracers in assessing sequestration potential of carbon in the coastal wetland ecosystems DOI

Xu Dong Ren,

Xiaowen Wang,

F F Zhang

et al.

Journal of Environmental Radioactivity, Journal Year: 2024, Volume and Issue: 277, P. 107464 - 107464

Published: June 7, 2024

Language: Английский

Citations

1
The Role of Benthic TA and DIC Fluxes on Carbon Sequestration in Seagrass Meadows of Dongsha Island DOI Creative Commons

Lan‐Feng Fan,

E. Kang,

Mariche Natividad

et al.

Journal of Marine Science and Engineering, Journal Year: 2024, Volume and Issue: 12(11), P. 2061 - 2061

Published: Nov. 13, 2024

Coastal blue carbon ecosystems sequester carbon, storing it as plant biomass and particulate organic matter in sediments. Recent studies emphasize the importance of incorporating dissolved inorganic forms into assessments. As sediment-stored decomposes, releases (DIC) total alkalinity (TA), both which are critical for regulating partial pressure CO2 (pCO2) thus sequestration. This study investigated role benthic DIC TA fluxes sequestration within seagrass meadows Dongsha Island’s inner lagoon (IL) during winter summer seasons. Chamber incubation experiments revealed elevated compared to global averages (107 ± 75.9 119 144 vs. 1.3 1.06 mmol m−2 d−1 DIC, 69.7 40.7 75.8 81.5 0.52 0.43 TA). Despite being approximately 1.5 times higher than fluxes, water pCO2 levels remained low (149 26 156 18 µatm). Mass balance calculations further indicated that was predominantly reabsorbed through photosynthesis (−135 −128 d−1). Conversely, accumulated largely exported (−60.3 −53.7 d−1), demonstrating natural ocean enhancement (OAE). highlights crucial IL coastal net autotrophy carbonate dissolution. Future research should explore implications these processes assess potential OAE other ecosystems.

Language: Английский

Citations

1