Estuarine Coastal and Shelf Science最新文献

{"title":"A systematic review of climate change impacts on water quality in transitional environments from a multi-hazard perspective","authors":"Asrat Tekle Asresu,&nbsp;Elisa Furlan,&nbsp;Fabienne Horneman,&nbsp;Federica Zennaro,&nbsp;Ngoc Diep Nguyen,&nbsp;Silvia Torresan,&nbsp;Andrea Critto,&nbsp;Antonio Marcomini","doi":"10.1016/j.ecss.2025.109194","DOIUrl":"10.1016/j.ecss.2025.109194","url":null,"abstract":"<div><div>Climate change-induced hazards and their impacts on the socio-economic and ecological system are a major global concern, particularly significant in transitional environments with high susceptibility to modifications, and exposure to multiple land, marine, and atmospheric hazards. These factors can lead to the deterioration of water quality and the ecosystem services they support. Despite the availability of studies that link climate change hazards with water quality parameters, this is the first attempt to provide a literature review that synthesizes these impacts from a multi-hazard perspective. Therefore, the present review provides an analysis and synthesis of publications of the last 20 years that analyzed climate hazard-induced alterations of water quality in transitional environments with a particular focus on eutrophication processes. The analysis revealed that multiple climate change hazards (including flood, storm surge, drought, tidal flooding and variation in wind regime) can influence the quality of transitional waters with flood and drought being the most prominent ones investigated in 74% and 44% of the studies respectively. These hazards and their interactions can alter the dynamics of water quality constituents through their influence on the hydrodynamic, morphodynamic, and biogeochemical processes of transitional ecosystems. This involves a variety of mechanisms and interdependent processes such as the mobilization and transport of sediments, nutrients, and other pollutants, the interaction of water masses with different characteristics, and the changes in water residence time. Nutrient concentration, salinity, turbidity, water temperature, and Chlorophyll-a (Chl-a) and primary productivity are the principal eutrophication-related parameters altered by different hazards. Besides, the interactions among different water quality indicators play a significant role in determining the overall water quality dynamics and the tendency of eutrophication. To illustrate these complex interactions, a conceptual framework was developed which can assist the understanding and analysis of climate change multi-hazard impacts on transitional waters. Finally, this work highlights that innovative observational and modeling tools are crucial for addressing the complex and dynamic interactions among climate change-related stressors, ecosystem processes, water quality constituents, site-specific morphological features and management interventions. Hence, the advancement of methodologies capable of integrating high-resolution remote and in-situ data collection technologies, alongside advanced physics-based and AI-driven models, leveraging their combined strengths, are required to deepen the understanding of complex system dynamics under multiple pressures, providing critical insights for informed decision-making on adaptation strategies.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"317 ","pages":"Article 109194"},"PeriodicalIF":2.6,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revealing the influence of physicochemical parameters on the taxonomic and functional diversity of macrobenthos in hangzhou bay, China","authors":"Kangning Jia ,&nbsp;Yibo Liao ,&nbsp;Yanbin Tang ,&nbsp;Rongliang Zhang ,&nbsp;Yangjie Li ,&nbsp;Lu Shou","doi":"10.1016/j.ecss.2025.109204","DOIUrl":"10.1016/j.ecss.2025.109204","url":null,"abstract":"<div><div>Different mechanisms in marine environments can have multifaceted effects on the diversity and ecology of macrobenthic communities, highlighting their significance for biodiversity monitoring and conservation efforts. We collected 59 sites in autumn (September 2021), spring (March 2022), summer (June 2022), and winter (December 2022), and calculated community diversity, functional-trait diversity, and functional trait space to examine spatial and temporal variations in the community structure of macrobenthos in Hangzhou Bay, an inlet of the East China Sea. Through Mantel tests, we investigated the relationship between taxonomic and trait beta diversity, and utilized distance-based redundancy analysis and variance partitioning to dissect the relative impacts of hydrology, sediment, and spatial distances on beta diversity. Our results revealed functional redundancy (different species exhibit similar traits) during the summer season, along with variations in trait composition across the different seasons. Notably, certain species displayed functional traits outside the functional space during both summer and winter, suggesting potential unique ecological strategies or adaptations. In dynamic environments like Hangzhou Bay, there appears to be complementarity between the taxonomic and trait beta diversity of macrobenthic communities, leading to consistent ecological niches among species and, consequently, similar functional traits. Complementarity indicates that environmental changes can select for specific biological functional traits, which in turn select for species that are suited for survival, thereby altering the community structure in the region. Results from the variance partitioning analysis indicated that spatial factors and hydrologic condition predominantly shape the community structure of macrobenthos in Hangzhou Bay.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109204"},"PeriodicalIF":2.6,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impacts of land use change on mangrove blue carbon services: A future perspective in northeastern Brazil","authors":"Nadia Selene Zamboni ,&nbsp;Maria de Fátima Alves de Matos ,&nbsp;Venerando Eustáquio Amaro ,&nbsp;Mattheus da Cunha Prudêncio ,&nbsp;Adriana Rosa Carvalho","doi":"10.1016/j.ecss.2025.109185","DOIUrl":"10.1016/j.ecss.2025.109185","url":null,"abstract":"<div><div>Mangroves are important Blue Carbon (BC) ecosystems, providing worldwide climate regulation and other ecosystem services. However, the demand for several economic activities has led to land use changes, which can impact mangrove BC services. This paper aims to analyze the effects of land cover conversion scenarios on mangrove dynamics and BC services delivery along the western South Atlantic coast over 27 years (2023–2050). We developed future scenarios of mangrove conversions by applying the InVEST Scenario Generator tool and using historical conversion rates from analyzing remote sensing hybrid images. Maps of future mangrove species distribution were subsequently used to estimate carbon stocks and emissions, total Net Carbon Sequestration (NCS), and Net Present Value (NPV) by using the InVEST BC model. Based on our results, forest area could decrease by about 7.1% and total carbon stored by 7% by 2050, mainly driven by the expansion of shrimp farms. The total NCS could reach an average value of about 20.1 tCO₂e × ha⁻¹ × yr⁻¹, and the average NPV could get at ≈ US$8000 × ha⁻¹ × yr⁻¹. By 2050, the lowest values of carbon stocks (321 tCO₂e × ha⁻¹) and highest values of carbon emissions (&gt;600 tCO₂e × ha⁻¹), as well as economic losses (&gt;US$200 thousand × ha⁻¹), seem to be concentrated along the mangrove edges, which suffer more from high-impact human activities such as salt extraction and shrimp farming. Results highlight the dynamics of Brazilian mangroves BC services and the need for protective measures and restrictions against the advance of high-impact land uses over these ecosystems.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"317 ","pages":"Article 109185"},"PeriodicalIF":2.6,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Blue carbon potential from rehabilitating urban mangrove forests in coastal city","authors":"Peiyang Qiao ,&nbsp;Yue Meng ,&nbsp;Changxin Liu ,&nbsp;Tingting Zhang ,&nbsp;Mei Li ,&nbsp;Liangxia Feng ,&nbsp;Qinchang Chen ,&nbsp;Jialin Zhang ,&nbsp;Chen Lin ,&nbsp;Xiaoxuan Gu ,&nbsp;Luzhen Chen","doi":"10.1016/j.ecss.2025.109200","DOIUrl":"10.1016/j.ecss.2025.109200","url":null,"abstract":"<div><div>Mangrove forests are critical coastal wetlands for the global blue carbon budget and play a significant role in mitigating climate change. Therefore, accurate and reliable assessments or predictions of mangrove blue carbon are essential to support the implementation of mangrove restoration projects and to underscore their importance. However, current evaluations of mangrove restoration outcomes, particularly regarding the carbon dioxide removal (CDR) potential of these forests, remain inadequate. This study aims to investigate the impact of mangrove restoration on blue carbon and CDR in Xiamen City, located in the southeastern coastal region of China. Specifically, the study seeks to quantify the carbon stocks of mangrove forests at present and in the future and to evaluate the contribution of mangrove restoration to achieving carbon neutrality and peak carbon emissions. Field investigations and soil sampling were conducted in 2022 to establish a biomass carbon prediction model and to assess mangrove blue carbon. The average mangrove blue carbon is currently estimated at 89.27 MgC ha⁻¹, and it is projected to increase to 112.07 MgC ha⁻¹ by 2030 and to 173.26 MgC ha⁻¹ by 2060. Additionally, this research evaluates the CDR by offsetting the net carbon gain against greenhouse gas (GHG) emissions, highlighting not only the significance of non-CO₂ GHGs in the mangrove carbon budget but also providing a robust foundation for the conservation and management of mangrove ecosystems, particularly in their capacity for carbon sequestration and their role in mitigating climate change.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109200"},"PeriodicalIF":2.6,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Charting the uncharted: Broad-scale benthic habitat distribution in the Brazilian continental margin","authors":"Vitor de Souza ,&nbsp;Ibon Galparsoro ,&nbsp;Tiago B. Gandra ,&nbsp;Luis A. Conti ,&nbsp;Marinez E. Scherer ,&nbsp;Jarbas Bonetti","doi":"10.1016/j.ecss.2025.109203","DOIUrl":"10.1016/j.ecss.2025.109203","url":null,"abstract":"<div><div>Understanding the distribution of benthic habitats is of key relevance to inform management measures to protect this environment from ever growing human activities. Broad-scale habitat mapping has been developed under several initiatives around the world, mostly relying on the mapping environmental attributes that are vital to explain different benthic fauna composition. This approach usually depends on a habitat classification scheme that provides a common language and description of habitats. One of the most widely applied classification schemes is the European Union Nature Information System (EUNIS), which has been used under different broad-scale mapping projects. In this article, we applied the EUNIS approach to map the distribution of benthic habitats in the Brazilian margin, segmented on the three ecoregion provinces that occur within the country marine waters: North Brazil Shelf (NBS), Tropical Southwestern Atlantic (TSA) and Warm Temperate Southwestern Atlantic (WTSA). We compiled GIS layers of environmental parameters, including (i) bathymetry; (ii) substrate type; (iii) depth of euphotic zone; (iv) depth of wave base and; (v) geomorphic features. A map covering 5,800,000 km2 of the Brazilian margin was produced, most of which were classified as abyssal mud (34.03%). Shelf habitats were mainly classified as offshore circalittoral mud (2.75%), infralittoral sand (1.83%) and circalittoral mud (1.77%). Biogenic habitats are highly concentrated in the infralittoral zone (29,579 km2) compared to the area mapped in the circalittoral (415 km2) and offshore circalittoral (9840 km2). The results presented in this research are of major relevance for management purposes, especially for supporting the ongoing Marine Spatial Planning endeavor in Brazil. Understanding the broad distribution of benthic habitats is relevant for different information layers to be produced under this process, such as the identification of values for conservation, sensitivity to human pressures and provision of ecosystem services.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"317 ","pages":"Article 109203"},"PeriodicalIF":2.6,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471358","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial and seasonal variability of CO2 flux and carbonate chemistry in a subtropical estuary","authors":"Larissa M. Dias ,&nbsp;Hui Liu ,&nbsp;Xinping Hu","doi":"10.1016/j.ecss.2025.109197","DOIUrl":"10.1016/j.ecss.2025.109197","url":null,"abstract":"<div><div>Quantifying the direction and magnitude of CO₂ flux in estuaries is necessary to better constrain the global carbon budget, yet carbonate systems and CO₂ flux in subtropical and urbanized estuaries are not well characterized. To estimate the CO₂ flux for Galveston Bay, a subtropical estuary located in the northwestern Gulf of Mexico proximal to the Houston-Galveston metroplex, monthly cruises were conducted along a transect extending from the Houston ship channel to the mouth of Galveston Bay and Gulf of Mexico from October 2017 to September 2018. Underway surface water partial pressure of CO₂ (<em>p</em>CO₂) measurements were conducted using a Shipboard Underway <em>p</em>CO₂ Environmental Recorder (SUPER-CO2) system. CO₂ flux was calculated for 0.025° × 0.025° latitude increments along the transect and total CO₂ flux for the Bay was estimated. On these cruises, discrete water samples were collected for laboratory analyses of total alkalinity (TA), total dissolved inorganic carbon (DIC), calcium (Ca²⁺), and pH (on the total scale, pH_T); and aragonite saturation state (Ω_Ar) was calculated using pH and DIC as well as measured Ca²⁺. Annual mean Bay water <em>p</em>CO₂ was 384.2 ± 56.7 μatm, TA was 2062.0 ± 213.2 μmol kg⁻¹, DIC was 1863.7 ± 160.9 μmol kg⁻¹, pH_T was 8.09 ± 0.17, and Ω_Ar was 2.43 ± 0.96. When compared to theoretical river-ocean mixing scenarios, TA values fell above the mixing line in winter and summer, indicating production, while DIC values displayed more spatial variability that included both production and consumption in different seasons. A large freshwater inflow event in spring was followed by a period of dilution (low salinity, TA, and DIC) and enhanced primary production (low water <em>p</em>CO₂ along with CO₂ uptake and high chlorophyll-<em>a</em> levels). CO₂ flux exhibited large seasonal and spatial variability, primarily due to seasonality in photosynthesis and variability of freshwater inflow events. Overall, Galveston Bay was a sink for CO₂ during the study period, with a mean air-sea CO₂ flux of −8.3 ± 17.3 mmol m⁻² d⁻¹, and carbonate chemistry in Galveston Bay was regulated by an interaction between hydrology and biogeochemistry. The carbonate chemistry and CO₂ uptake patterns of Galveston Bay differ from those that are common in temperate estuaries, which reiterates the need for further research in subtropical estuaries.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109197"},"PeriodicalIF":2.6,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Anthropic and natural variations effects on basin hydrodynamics and settling time in multi-inlet systems: Insights from Marano and Grado lagoon","authors":"Pascolo Sara,&nbsp;Petti Marco,&nbsp;Bosa Silvia,&nbsp;Rondinella Fabio","doi":"10.1016/j.ecss.2025.109196","DOIUrl":"10.1016/j.ecss.2025.109196","url":null,"abstract":"<div><div>Multi-inlet lagoons are complex environments with a generally high socio-economic value, which often require interventions aimed at stabilizing the inlets or improving navigability. The effects that arise from anthropogenic or natural changes localized in a single basin can concern the entire system since the basins are interconnected. This study analyses the changes occurring in the Marano and Grado lagoon over the last 52 years, with a 2DH numerical approach and the correlation between different hydrodynamic variables. In particular, tidal prisms, water levels, residual currents, asymmetries between tidal flood and ebb are analysed and discussed in the light of a new parameter called settling time. It suggests the time required by each basin to drain the volume of water stored during the rising tidal phase. The construction of the jetties to protect the Porto Buso inlet and the narrowing of the Lignano cross-section inlet have increased the settling time of the respective basins, while the loss of salt marshes in the Grado basin has reduced it. The results obtained show that any modification of the settling time of a basin in a tidal multi-inlet system lengthens or shortens the response of the basin itself to the tidal forcing. This also determines level gradients, and transverse flows that modify the hydrodynamic pattern of the neighbouring basins.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109196"},"PeriodicalIF":2.6,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143419519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structure and dynamics of stationary fronts in an angled river plume","authors":"Keyan Liu ,&nbsp;Jiaxue Wu ,&nbsp;Huan Liu ,&nbsp;Xiangyu Li ,&nbsp;Zhenkun Lin ,&nbsp;Leiping Ye","doi":"10.1016/j.ecss.2025.109193","DOIUrl":"10.1016/j.ecss.2025.109193","url":null,"abstract":"<div><div>In angled river plumes, the river flow is oriented obliquely to the coast, leading to a lateral expansion into the sea rather than a radial one. However, the frontal structure and dynamics in these systems are not straightforward, especially under the influence of coastal currents. Here, we present detailed observations of an angled river plume and its fronts in the Macao waters. During the ebb tide, the river plume transitions from subcritical to supercritical due to the acceleration caused by lateral contraction. Despite this acceleration, the plume front remains nearly stationary, meeting the critical conditions in a coordinate system normal to the front. This quasi-stationary pattern of the front results from the plume expansion, which is established as a steady gravity current. Furthermore, the adjustment of the cross-flow reduces the Froude angle, causing the frontal shape to a half parabola. These findings offer novel understanding of stationary surface fronts in an angled river plume, which may trap the river-borne materials and pose significant challenges to coastal environments and ecosystems.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109193"},"PeriodicalIF":2.6,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterization of copepod ingestion rates in the Humboldt Archipelago and implications for a biogeochemical model in the Coquimbo upwelling system","authors":"Victor M. Aguilera ,&nbsp;Linda Barranco ,&nbsp;Pablo Gorostiaga ,&nbsp;Cristian A. Vargas ,&nbsp;Ruben Escribano ,&nbsp;Nicolas Bralic ,&nbsp;Véronique Garçon","doi":"10.1016/j.ecss.2025.109195","DOIUrl":"10.1016/j.ecss.2025.109195","url":null,"abstract":"<div><div>Copepod ingestion rates (IR) have not yet been addressed in the upwelling system of Coquimbo (30°S), despite their critical role in linking the region's high primary productivity to upper trophic levels and biodiversity within the Humboldt Archipelago. Given its natural variability and influence on mesozooplankton biomass, IR represents a challenging step during the parameterization of biogeochemical models employed to understand and predict the productivity of marine ecosystems. This has led to a reliance on simplified and imported information that does not necessarily represent the local environmental-ecological context, significantly influencing the uncertainty of the current generation of Earth system models. In the upwelling system of Coquimbo, the ENSO-Climate change and Carbon Cycle in the Pacific Southeast (ECLIPSE) project is parameterizing a coupled Biogeochemical model for Eastern Boundary Upwelling Systems (BioEBUS) since 2022. Thus, in addition to characterizing the IR of the copepods, the research effort aims to understand the relationship between the El Niño Southern Oscillation (ENSO) and oxygen/CO₂ fluxes in the sub-tropical upwelling regions of the HCS. To constrain BioEBUS outputs, in this study we report the results of grazing experiments conducted in the system throughout the 2023–2024 seasonal cycle, with different copepod species under food resources varying between 18 and 30 mg Chl m⁻² and 1–7 g C m⁻². The IR of <em>Calanus chilensis</em> (copepodite V and adult females)<em>, Calanoides patagoniensis, Metridia lucens</em> and <em>Paracalanus</em> cf<em>. indicus</em> varied between 2 and 63 μg C ind⁻¹ d⁻¹, maximum IR was 1.6 d⁻¹, while the IR of the corresponding size class reached 300 g C m⁻² d⁻¹. These results may alert the modeling community to reconsider parameterization information regarding mesozooplankton grazing rates.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"316 ","pages":"Article 109195"},"PeriodicalIF":2.6,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445599","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of soil organic carbon quantification model and comparison based on CHN analyser, Loss on Ignition, and Walkley-Black methods for mangrove soils in Madagascar","authors":"Ismael Ratefinjanahary ,&nbsp;Richard MacKenzie ,&nbsp;Sahadev Sharma ,&nbsp;Herintsitohaina Razakamanarivo ,&nbsp;Voahirana Razafintsalama ,&nbsp;Kevin Ravelosamiariniriana ,&nbsp;Adam Welti ,&nbsp;Nandrianina Ramifehiarivo","doi":"10.1016/j.ecss.2025.109182","DOIUrl":"10.1016/j.ecss.2025.109182","url":null,"abstract":"<div><div>Mangrove ecosystems have a high capacity to sequester and store atmospheric carbon dioxide (CO₂) compared to other tropical forests. Most of this CO₂ is stored as organic carbon in the mangrove soils (50–90%). While quantifying carbon stocks in mangrove trees is generally a straightforward process, quantifying carbon stocks in mangrove soils can be difficult and expensive due to the lack of analytical equipment or the high costs associated with soil organic carbon (SOC) analysers, respectively. The large number of samples coupled with repeated soil sampling required to quantify soil carbon sequestration/burial rates can further inflate these costs. The development of SOC models to quantify carbon content can help resolve these issues and increase the ease of quantifying soil carbon stocks or sequestration rates. We compared different methods to quantify SOC stocks from multiple locations in Madagascar mangroves. A total of 1327 soil samples from 66 plots sampled from the west coast of Madagascar were consecutively analysed with the Walkley-Black (WB), Loss on Ignition (LOI₄₀₀, LOI₅₅₀) and CHN analyser methods. These four available methods resulted in significant differences (<em>p</em> &lt; 0.001) of SOC values, varying from 1.93 ± 0.04% with CHN, 4.49 ± 0.08% with LOI_400, 4.54 ± 0.09% with WB, and 7.33 ± 0.11% with LOI₅₅₀. As the CHN method is widely regarded as the most accurate method thus, CHN values were used to calibrate and estimate LOI_400, LOI₅₅₀ and WB results with linear regression functions. After calibration, the coefficient of regressions resulted in conversion factors of 0.415 for WB, 0.253 for LOI₄₀₀ and 0.157 for LOI₅₅₀. This study demonstrated the reliability of locally available methods for SOC analysis for mangroves and developed calibration coefficients that can be used to increase the accuracy of SOC methods when CHN analyzers are not available for blue carbon stock assessment.</div></div>","PeriodicalId":50497,"journal":{"name":"Estuarine Coastal and Shelf Science","volume":"317 ","pages":"Article 109182"},"PeriodicalIF":2.6,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}