Regional Studies in Marine Science最新文献

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Freshwater plume’s impact on the thermohaline structure of the water column in the Central Zone of the Strait of Magellan
IF 2.1 4区 环境科学与生态学
Regional Studies in Marine Science Pub Date : 2025-02-19 DOI: 10.1016/j.rsma.2025.104087
Vicente Aravena-Yáñez , José Garcés-Vargas , Iván F. Benavides-Martínez
{"title":"Freshwater plume’s impact on the thermohaline structure of the water column in the Central Zone of the Strait of Magellan","authors":"Vicente Aravena-Yáñez ,&nbsp;José Garcés-Vargas ,&nbsp;Iván F. Benavides-Martínez","doi":"10.1016/j.rsma.2025.104087","DOIUrl":"10.1016/j.rsma.2025.104087","url":null,"abstract":"<div><div>The Strait of Magellan, a sub-Antarctic channel connecting the Pacific and Atlantic oceans, is divided into three zones based on oceanographic and meteorological characteristics: Eastern, Central, and Western. The Central Zone is influenced by strong northwesterly winds and freshwater inputs from rivers and precipitation, making it crucial to understand its thermal and haline dynamics in response to these forcings. This study examines the seasonal variability of temperature and salinity in the water column at a fixed station in the Central Zone from 2018 to 2022, analyzing key environmental drivers. A detailed assessment of absolute salinity fluctuations in the upper layers was conducted using ocean reflectance from Sentinel-2 satellite data, river discharge, and wind dynamics, modeled with a generalized additive model incorporating delayed effects. Results reveal a seasonal surface temperature pattern, increasing in summer and decreasing in winter due to solar radiation. In winter, the surface layer remained relatively uniform, while summer conditions led to thermal stratification driven by intense solar heating. A winter thermal inversion was observed, attributed to reduced solar radiation and the vertical intrusion of warmer Modified Subantarctic Water from the Pacific. Surface salinity exhibited a seasonal cycle, with lower values and stronger stratification in winter due to freshwater discharge and wind-driven advection of the river plume toward the study site. In contrast, deeper layers remained relatively homogeneous in temperature and salinity, influenced by Pacific-origin Modified Subantarctic Water. Climate change-driven shifts in these forcings could alter the water column structure, impacting ecosystem functioning and Indigenous communities reliant on marine resources. This study provides essential insights into the thermal and haline dynamics of the Central Zone, supporting marine biodiversity management and conservation efforts in the region.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"83 ","pages":"Article 104087"},"PeriodicalIF":2.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Resilient mantle, vulnerable shell: Ocean acidification's impact on juvenile pen shell Atrina maura
IF 2.1 4区 环境科学与生态学
Regional Studies in Marine Science Pub Date : 2025-02-19 DOI: 10.1016/j.rsma.2025.104082
Rosa Virginia Domínguez-Beltrán, Norma Yolanda Hernández-Saavedra, Martha Patricia Hernández-Cortés, Crisalejandra Rivera-Pérez
{"title":"Resilient mantle, vulnerable shell: Ocean acidification's impact on juvenile pen shell Atrina maura","authors":"Rosa Virginia Domínguez-Beltrán,&nbsp;Norma Yolanda Hernández-Saavedra,&nbsp;Martha Patricia Hernández-Cortés,&nbsp;Crisalejandra Rivera-Pérez","doi":"10.1016/j.rsma.2025.104082","DOIUrl":"10.1016/j.rsma.2025.104082","url":null,"abstract":"<div><div>Ocean acidification results from the accumulation of CO<sub>2</sub> in seawater. Predictions indicate a pH decrease of 0.3–0.5 units by the year 2100 and 0.7 units by the year 2300. The effects of OA vary among species, exposure time, physiological limits, and short-term adaptability. This phenomenon can be exacerbated in many coastal marine habitats due to nutrient inputs, upwelling events, and terrestrial sources of acidity. This study analyzed the effects of pH reduction on the shell and mantle tissue structure of the juvenile pen shell (<em>Atrina maura</em>) living in coastal bay where the natural pH is 7.8. These organisms were exposed to a reduction of pH (7.5) for 40 days. Scanning electron microscopy (SEM) analysis of the shells revealed signs of malformation and dissolution of the calcite prismatic layer and the nacre layer at acidic pH (7.5 ± 0.2) compared to controls (7.8 ± 0.1) throughout the experiment. However, shell growth increased 13.95 % after CO<sub>2</sub> injection after 40 days of exposure, while the shell index and the mantle tissue remained unaffected any of the times evaluated. The results suggest that <em>A. maura</em>, a species naturally exposed to acidic environments, may experience effects from pH reductions primarily in their shell microstructure, while mantle morphology remains unaffected. The results obtained here prove that resilience of marine species, such as <em>A. maura</em>, can be compromised by ocean acidification (OA), highlighting the importance of continued exploration in this field to better understand the broader implications of OA on marine ecosystems.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"83 ","pages":"Article 104082"},"PeriodicalIF":2.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Review of metal concentration in Sardina pilchardus: Insights from the seas and oceans
IF 2.1 4区 环境科学与生态学
Regional Studies in Marine Science Pub Date : 2025-02-19 DOI: 10.1016/j.rsma.2025.104080
Enrique Lozano-Bilbao , Arturo Hardisson , Soraya Paz , Eduardo Franco-Fuentes , Ángel J. Gutiérrez
{"title":"Review of metal concentration in Sardina pilchardus: Insights from the seas and oceans","authors":"Enrique Lozano-Bilbao ,&nbsp;Arturo Hardisson ,&nbsp;Soraya Paz ,&nbsp;Eduardo Franco-Fuentes ,&nbsp;Ángel J. Gutiérrez","doi":"10.1016/j.rsma.2025.104080","DOIUrl":"10.1016/j.rsma.2025.104080","url":null,"abstract":"<div><div>16 articles, meeting stringent criteria, were selected from 71 initially identified articles. Data on metal concentrations in <em>Sardina pilchardus</em> muscle were extracted, focusing on Al, As, B, Cd, Cu, Fe, Hg, Ni, Pb, and Zn, as well as vital macro and micronutrients. Exclusions encompassed non-indexed or non-peer-reviewed journals and studies lacking species names or specimen origin clarity. The Adriatic and Marmara Seas presented significant variations in metal concentrations, attributed to environmental, geographical, and anthropogenic influences. The Aegean Sea showed lower metal concentrations but remained a concern due to multiple anthropogenic sources. In the Mediterranean, disparities between Algeria and Morocco highlighted geological and anthropogenic influences. Variances in the Atlantic Ocean between the Canary Islands and the Azores reflected differing levels of human activity and natural processes.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"83 ","pages":"Article 104080"},"PeriodicalIF":2.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Data-limited stock assessment of yellow striped goatfish (Parupeneus chrysopleuron) from the southern Taiwan Strait
IF 2.1 4区 环境科学与生态学
Regional Studies in Marine Science Pub Date : 2025-02-18 DOI: 10.1016/j.rsma.2025.104086
Peilong Ju , Xintai Zou , Mingru Chen , Zhenbin Lu
{"title":"Data-limited stock assessment of yellow striped goatfish (Parupeneus chrysopleuron) from the southern Taiwan Strait","authors":"Peilong Ju ,&nbsp;Xintai Zou ,&nbsp;Mingru Chen ,&nbsp;Zhenbin Lu","doi":"10.1016/j.rsma.2025.104086","DOIUrl":"10.1016/j.rsma.2025.104086","url":null,"abstract":"<div><div>The yellow striped goatfish (<em>Parupeneus chrysopleuron</em>) represents a data-limited stock in the southern Taiwan Strait, posing significant challenges for stock assessment and fisheries management development. Length-based assessment methodologies offer a preliminary approach to estimate stock status through specific reference points. This study utilizes two length-based methods -LBSPR (length-based spawning potential ratio) and LBB (length-based Bayesian biomass method) in conjunction with growth parameters (<em>L</em><sub><em>inf</em></sub>, <em>L</em><sub><em>50</em></sub> and <em>L</em><sub><em>95</em></sub>) and various mortality rates (<em>M/K</em>) to evaluate this stock. Stock status is preliminarily assessed via reference points derived from LBSPR and LBB, along with <em>F/M</em> values from conventional mortality estimation methods. Results indicate that all the <em>F/M</em> and spawning potential ratio (<em>SPR</em>) values estimated from three LBSPR scenarios suggest overfishing, whereas LBB scenarios reveal the stock was either overfished or approaching overfishing conditions in 2018. Current management strategies for the yellow striped goatfish stock in the southern Taiwan Strait are deemed inadequate. The methodological approach outlined in this research provides a useful case study for assessing data-limited stock status and offers valuable insights for fisheries management in small-scale Chinese fisheries.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"83 ","pages":"Article 104086"},"PeriodicalIF":2.1,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444734","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Temporal variations in water quality in a tropical urbanized estuary
IF 2.1 4区 环境科学与生态学
Regional Studies in Marine Science Pub Date : 2025-02-17 DOI: 10.1016/j.rsma.2025.104070
Marianne P. Mello , Anderson de S. Cabral , Fernando N. Pinto , Fernando Pulgati , Jean L. Valentin , Rodolfo Paranhos
{"title":"Temporal variations in water quality in a tropical urbanized estuary","authors":"Marianne P. Mello ,&nbsp;Anderson de S. Cabral ,&nbsp;Fernando N. Pinto ,&nbsp;Fernando Pulgati ,&nbsp;Jean L. Valentin ,&nbsp;Rodolfo Paranhos","doi":"10.1016/j.rsma.2025.104070","DOIUrl":"10.1016/j.rsma.2025.104070","url":null,"abstract":"<div><div>Seasonal variability in water quality plays a crucial role in understanding the resilience and impacts on culturally eutrophic estuarine environments, such as Guanabara Bay (Brazil). We evaluated potential seasonal influences on a culturally eutrophic estuarine environment during 2011 and 2012 by assessing water quality variables at six sites visited monthly. Despite persistent sewage discharges and elevated nutrient levels, we hypothesize a hydrobiological response to climatic variations. All data were compiled into a database and analyzed using descriptive statistics. Principal Component Analysis (PCA) was employed to integrate chemical and biological data, providing insights into general ecological patterns within Guanabara Bay. Time series analyses were performed using adjusted models to examine the nature and structure of the data, prioritizing pattern evaluation over forecasting scenarios. Significant seasonal variations were observed for nitrogenous compounds (ammonia and nitrite), temperature, and dissolved oxygen. During the dry season (May to September), ammonia and nitrite concentrations were high, while temperature and dissolved oxygen were low. The opposite pattern was observed during the rainy season (October to April). Rainfall and river drainage, which carry domestic and industrial sewage from the bay’s watershed, strongly influenced surface waters. In contrast, bottom waters appeared unaffected by seasonal influences, instead responding to tidal currents. Despite severe negative environmental impacts, significant trends were obtained even with just two years of data. These findings indicate that annual climatic cycles mainly drive seasonal patterns in Guanabara Bay’s water quality.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"83 ","pages":"Article 104070"},"PeriodicalIF":2.1,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Insights into conservation success: Analysing shore angling before implementing a marine protected area
IF 2.1 4区 环境科学与生态学
Regional Studies in Marine Science Pub Date : 2025-02-17 DOI: 10.1016/j.rsma.2025.104077
Samira Nuñez-Velazquez , Pedro Veiga , Gonçalo Jacinto , Tereza Fonseca , Pedro Monteiro , Karim Erzini , Jorge M.S. Gonçalves , Barbara Horta e Costa , João Pontes , Pedro M. Guerreiro , Mafalda Rangel
{"title":"Insights into conservation success: Analysing shore angling before implementing a marine protected area","authors":"Samira Nuñez-Velazquez ,&nbsp;Pedro Veiga ,&nbsp;Gonçalo Jacinto ,&nbsp;Tereza Fonseca ,&nbsp;Pedro Monteiro ,&nbsp;Karim Erzini ,&nbsp;Jorge M.S. Gonçalves ,&nbsp;Barbara Horta e Costa ,&nbsp;João Pontes ,&nbsp;Pedro M. Guerreiro ,&nbsp;Mafalda Rangel","doi":"10.1016/j.rsma.2025.104077","DOIUrl":"10.1016/j.rsma.2025.104077","url":null,"abstract":"<div><div>In January 2024, the \"Natural Marine Park of the Algarve Reef – <em>Pedra do Valado</em>\" (NMPAR-PV; southern Portugal), a community-based Marine Protected Area (MPA) was formally classified, setting the scene for a new paradigm for co-creating Portuguese MPAs. While complying with the best practices for MPA establishment, this area also contributes to national and international conservation targets. Measuring the success of MPAs relies on the availability of the best scientific information, including baseline data on biodiversity, habitat and human activities characterization. Marine recreational fishing is a significantly important human activity within this recently designated MPA. Hence, the systematic collection of quantitative data on this activity is critical for determining its impacts and ensuring the preservation and protection of fisheries resource. This study aims to collect and analyze socioeconomic and ecological data on shore angling fisheries at NMPAR-PV, implementing surveys and instantaneous counting. Data from 325 questionnaires and 27 counting surveys conducted between February 2022 and February 2023 highlighted the importance of shore angling. The activity is primarily conducted by local Portuguese men, over 50, employed and with low formal education. Most recreational fishers supported the MPA's implementation, suggesting community care for conservation efforts. The annual fishing effort was estimated at 52 198 ± 6 631 angling hours, with peaks in Autumn. Annual catches, dominated by Scombridae and Sparidae species, were estimated at 10.41 ± 1.96 tonnes of fish. This study provides valuable insights into the evolution of recreational fishing activity within the MPA, addressing important information to assess its effectiveness.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"83 ","pages":"Article 104077"},"PeriodicalIF":2.1,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143420296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Seasonal and spatial distribution of AmphiOctopus fangsiao and Octopus variabilis in the southern Yellow and East China Seas: Fisheries management implications based on climate scenario predictions
IF 2.1 4区 环境科学与生态学
Regional Studies in Marine Science Pub Date : 2025-02-16 DOI: 10.1016/j.rsma.2025.104072
Linlin Yang , Min Xu , Zunlei Liu , Yi Zhang , Yan Cui , Shengfa Li
{"title":"Seasonal and spatial distribution of AmphiOctopus fangsiao and Octopus variabilis in the southern Yellow and East China Seas: Fisheries management implications based on climate scenario predictions","authors":"Linlin Yang ,&nbsp;Min Xu ,&nbsp;Zunlei Liu ,&nbsp;Yi Zhang ,&nbsp;Yan Cui ,&nbsp;Shengfa Li","doi":"10.1016/j.rsma.2025.104072","DOIUrl":"10.1016/j.rsma.2025.104072","url":null,"abstract":"<div><div><em>AmphiOctopus fangsiao</em> and <em>Octopus variabilis</em> are economically important species that dominate the northwest Pacific cephalopod communities. However, little is known about their seasonal and spatial distributions in the southern Yellow Sea and East China Sea. This study aimed to identify the seasonal and spatial distributions of <em>A. fangsiao</em> and <em>O. variabilis</em>, explore potential relationships with environmental variables, and predict annual mean habitat variations under different climate scenarios. Our findings revealed that <em>A. fangsiao</em> was concentrated in the southern Yellow Sea in spring, in the Zhoushan fishing ground near the Yangtze River Estuary in summer, expanded to the entire East China Sea in autumn, and migrated offshore in winter. In contrast, <em>O. variabilis</em> was concentrated in the Zhoushan fishing grounds in spring, moved eastward in summer, shifted southward to the Yushan fishing grounds in autumn, and moved farther south to the Yushan-Wentai-Mindong fishing grounds in winter. Additionally, we predicted the most suitable sea bottom temperature (SBT) for <em>A. fangsiao</em> to be 10–25°C, with sea bottom salinity (SBS) of 29–31 ‰, whereas for <em>O. variabilis</em>, the most suitable SBT was 27°C, with an SBS of 34–35 ‰. Our results showed that under different climate change scenarios, the annual mean habitat area of <em>A. fangsiao</em> will decrease under SSP1–2.6 by 2050, and increase under SSP1–2.6 by 2100, whereas the area will shrink significantly under the SSP5–5.8 scenario by both 2050 and 2100. Moreover, the annual mean habitat of <em>O. variabilis</em> will shift northward offshore under SSP1–2.6 scenario by 2050 and 2100, as well as under SSP5–8.5 by 2050, but will shrink significantly under SSP5–8.5 by 2100. These results may provide guidance for sustainable fishing and management of both species by specifically incorporating climate change.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"83 ","pages":"Article 104072"},"PeriodicalIF":2.1,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Wind sea and swell discrimination in the outer Rio De La Plata Estuary, South Atlantic Ocean
IF 2.1 4区 环境科学与生态学
Regional Studies in Marine Science Pub Date : 2025-02-16 DOI: 10.1016/j.rsma.2025.104079
Alejandro Salimbeni , Guadalupe Alonso , Alexander Babanin , Walter Dragani
{"title":"Wind sea and swell discrimination in the outer Rio De La Plata Estuary, South Atlantic Ocean","authors":"Alejandro Salimbeni ,&nbsp;Guadalupe Alonso ,&nbsp;Alexander Babanin ,&nbsp;Walter Dragani","doi":"10.1016/j.rsma.2025.104079","DOIUrl":"10.1016/j.rsma.2025.104079","url":null,"abstract":"<div><div>This study focuses on the comprehensive discrimination and characterization of wind-sea and swell dominating conditions in the outer Río de la Plata estuary (RDP). For that, time series of bulk wave parameters and wave spectra covering the period from 1996 to 2020 were analyzed. Results revealed that 57 % of the spectra exhibit double peaks indicating the prevalence of simultaneous wind-sea and swell events. To differentiate between wind-waves and swell cases, the Pierson–Moskowitz (PM) spectrum peak method was implemented. In this method, the ratio between the peak energy of a wave system and the energy of the PM spectrum with the same peak frequency is computed. If this ratio is greater than one, the wave system is categorized as wind-sea; otherwise, as swell. Later, a support vector network (SVM) classificator was applied to significant height (Hs) and peak period (Tp). Results indicate that a linear expression (Tp = 2.5 Hs + 3.3) optimally separates wind-sea and swell. The typical Hs were 1–2 m for wind-sea and 0.5–1 m for swell, with mean Tp values of 5.2 s and 10.5 s respectively. Wind-sea waves predominantly propagated from the E and S, while swell from the SE. Swell seasonality indicated the highest occurrence during the winter months and minimal occurrences during summer. Finally, the performance of the WAVERYS and IOWAGA products in predicting arrival times of swell at the RDP was evaluated. Both predicted an earlier arrival time for swell in over 70 % of the events. These results highlight the reliability of these global products in anticipating swell arrivals.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"83 ","pages":"Article 104079"},"PeriodicalIF":2.1,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453965","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Predicting the potential habitat suitability of mangrove bioindicator species- Telescopium telescopium (Linnaeus, 1758) through MaxEnt modelling
IF 2.1 4区 环境科学与生态学
Regional Studies in Marine Science Pub Date : 2025-02-16 DOI: 10.1016/j.rsma.2025.104073
Harisankar Ray , Nilanjan Das , Soumyadip Pal , Subodh Chandra Pal , Sudipto Mandal
{"title":"Predicting the potential habitat suitability of mangrove bioindicator species- Telescopium telescopium (Linnaeus, 1758) through MaxEnt modelling","authors":"Harisankar Ray ,&nbsp;Nilanjan Das ,&nbsp;Soumyadip Pal ,&nbsp;Subodh Chandra Pal ,&nbsp;Sudipto Mandal","doi":"10.1016/j.rsma.2025.104073","DOIUrl":"10.1016/j.rsma.2025.104073","url":null,"abstract":"<div><div>Mangrove ecosystems are blessed with molluscs that are a key component as bioindicator species and measure the environment's health. The most prevalent and most sensitive bioindicator species in mangroves worldwide is <em>Telescopium telescopium</em>. Habitat loss is the evitable cause of species extinction, however, the species distribution and loss (here, <em>T. telescopium</em>) due to climate change factors throughout the globe is still not clear. The maximum entropy species distribution model (MaxEnt) was used to investigate the present habitat suitability distribution of <em>T. telescopium</em> population. Based on the results, <em>T. telescopium</em> showed high potential distribution in South-East Asia which is dominated by mangrove regions. The MaxEnt model showed an AUC (area under the curve, \"Sensitivity vs. Specificity\") value of 0.962, indicating its high accuracy. The Jackknife test revealed the temperature as the primary environmental factor influencing <em>T. telescopium</em> distribution in mangrove sediments (Regularised raining Gain=1.43). The distribution of <em>T. telescopium</em> was positively correlated with the distribution of mangroves worldwide (R<sup>2</sup>=62.49 %) using GIS-based regression analysis. A global circulation model was conducted using the temperature data from the Coupled Model Intercomparison Project-6 for the year 2100. The results showed that the population of <em>T. telescopium</em> was expected to decline steadily and shortly with the temperature rise. Here, the research showed that temperature, elevation, and rainfall were also responsible variables that influenced the distribution and loss of <em>T. telescopium</em> globally besides mangrove or habitat loss.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"83 ","pages":"Article 104073"},"PeriodicalIF":2.1,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143453966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Allometric aboveground biomass equations to quantify carbon content of Southeast Australian saltmarsh vegetation
IF 2.1 4区 环境科学与生态学
Regional Studies in Marine Science Pub Date : 2025-02-15 DOI: 10.1016/j.rsma.2025.104044
Jami Butler , Clare Duncan , Paul E. Carnell , Anirban Akhand , Stacey M. Trevathan-Tackett , Peter I. Macreadie
{"title":"Allometric aboveground biomass equations to quantify carbon content of Southeast Australian saltmarsh vegetation","authors":"Jami Butler ,&nbsp;Clare Duncan ,&nbsp;Paul E. Carnell ,&nbsp;Anirban Akhand ,&nbsp;Stacey M. Trevathan-Tackett ,&nbsp;Peter I. Macreadie","doi":"10.1016/j.rsma.2025.104044","DOIUrl":"10.1016/j.rsma.2025.104044","url":null,"abstract":"<div><div>Global salt marshes are significant carbon reserves, and with the growth in “blue carbon” projects, reliable quantification of its carbon storage is required. While methods for the quantification of carbon content in soils are well established, we often lack models for estimating carbon bound within plant biomass due to the high variability of growth forms among plant species. The present study aimed to develop species-specific allometric equations and carbon conversion factors that will enable the estimation of carbon stocks in above-ground biomass (AGB) of two dominant Australian saltmarsh shrubs. The linear regression models developed used lab-derived biomass and field-derived measurements of canopy diameter and/or shrub height to predict carbon content, allowing us to explain 89.3 % of observed variance in AGB for <em>Tecticornia arbuscula</em> and 61.5 % of observed variance in <em>Suaeda australis</em>. Microelemental analysis of woody tissues revealed a mean carbon content of approximately 46–48 % across both shrub species and all size classes. The species-specific AGB equations and carbon conversion factors presented here provide land managers, scientists and policymakers with non-destructive methods for rapid quantification of vegetative biomass and carbon stocks in Southeast Australian saltmarshes.</div></div>","PeriodicalId":21070,"journal":{"name":"Regional Studies in Marine Science","volume":"83 ","pages":"Article 104044"},"PeriodicalIF":2.1,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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