Watershed Ecology and the Environment最新文献

{"title":"A background review and ecological risk assessment of the tactical basin plan for the Otter Creek Basin watershed ecosystem restoration project in central Vermont, USA","authors":"James D. Snook","doi":"10.1016/j.wsee.2022.09.001","DOIUrl":"10.1016/j.wsee.2022.09.001","url":null,"abstract":"<div><p>Extreme climate events, such as hurricanes and tropical storms, can cause acute instability of the hydrologic cycle, thereby threatening the sustainability and resiliency of an authentic watershed ecosystem’s services. A 2011 extreme climate event, known as Hurricane/Tropical Storm Irene (Irene), imposed an acute effect on the quality of the ecosystem services in Vermont. This risk assessment of the Otter Creek Basin (the Basin) watershed restoration in central Vermont included an analysis of the conceptual site model, key elements of the strategic plan, and potential ecological outcomes. The outcome of the ecological restoration of the Basin is dependent upon an adaptive management strategy, which is implemented through various regulatory policies. Thereby, a systematic literature review (SLR) of regulatory milestone documents released between 1998 and 2019 was completed to characterize and assess the Basin’s strategic planning efforts and forecasts. To operationalize this study, a replicable methodology was utilized by using a conceptual site model to assess and forecast data trends. Analysis of the data trends resulted in an ecological risk assessment of the 2019 tactical basin plan (TBP) that forecasted 2021–2025 restoration activities. Currently in a transition phase as a hybrid ecosystem while undergoing restoration activities, the Basin’s restoration strategy could result in the re-establishment of the watershed as an authentic ecosystem, which can self-regulate with appropriate biodiversity and ecosystem function based on past history. However, without restoration and resiliency, a poorly managed strategy could result in a decreased classification toward a novel, no-analogue ecosystem, where keystone species are lost and ecosystem functions are highly altered. Therefore, a successful restoration is essential to elevate the Basin from a hybrid ecosystem by restoring its authentic characteristics and regaining its self-regulated natural ecosystem services.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"4 ","pages":"Pages 86-99"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471422000067/pdfft?md5=e50e27ee0162420707a8fcd34075392b&pid=1-s2.0-S2589471422000067-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91257651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Phytochemical and physicochemical screening of plant-based materials as coagulants for turbidity removal – An unprecedented approach","authors":"Manoj Kumar Karnena,&nbsp;Vara Saritha","doi":"10.1016/j.wsee.2022.11.006","DOIUrl":"10.1016/j.wsee.2022.11.006","url":null,"abstract":"<div><p>Globalization and industrialization lead to the corresponding increase of effluents discharged into the nearest water bodies. The persistence of pollution in the ecological system has led to uncertainty about living habitats; drinking water safety has become a societal issue attached to great importance. As we increasingly become aware of environmental problems and their impacts on human life, we realize that current problem-solving using contemporary water treatment techniques cannot provide adequate solutions owing to their advantages and disadvantages. Nature-based solutions are required as they are the best alternative for treating polluted water. Conventional coagulation is not a new technique that has been utilized in ancient times and works as a sustainable solution for water treatment and reduces the costs associated with the other treatment methods. Even though these techniques have been practised since ancient times, there is still a need to explore more plants to identify coagulating properties. The current study aims to do the phytochemical and physicochemical screening of the plant-based materials to identify them as coagulants and compare their efficiencies with the conventional inorganic and animal-based coagulants; out of 18 plant-based materials, <em>Moringa oleifera, Manihot esculenta and Pisum Sativum</em> removed turbidity up to 100% are subjected to the FTIR, XRD, and SEM to analyze the functionalized groups responsible for the polymer formation and identify the interaction between the coagulator's and suspended particles. The results showed that plant-based materials could be promising solutions for water quality challenges.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"4 ","pages":"Pages 188-201"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471422000171/pdfft?md5=ce0600a234b846a25b39221f69826cd5&pid=1-s2.0-S2589471422000171-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76919285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biochemical and genotoxic effects of some pesticides on the Egyptian Toads, Sclerophrys regularis (Reuss, 1833)","authors":"Khaled A. Osman ,&nbsp;Amira Ali ,&nbsp;Nabila S. Ahmed ,&nbsp;Ayman S. El-Seedy","doi":"10.1016/j.wsee.2022.10.002","DOIUrl":"10.1016/j.wsee.2022.10.002","url":null,"abstract":"<div><p>The effect of the 1/10 the application rates of either copper sulfate, temephos, glyphosate, or bifenthrin on some biochemical and genotoxic markers of the Egyptian toads,<!--> <strong><em>Sclerophrys regularis</em></strong>, exposed for 96 h under conditions similar to the real situation was investigated. The results illustrated that, brain acetylcholinesterase (AChE) was significantly inhibited following temephos treatment, while the enzyme activities markedly increased following either glyphosate or bifenthrin exposure. Liver glutathione-S-transferase (GST) activity was inhibited following either copper sulfate or bifenthrin, while the activity increased following glyphosate treatment. Also, the data illustrated that, The level of glutathione reduced (GSH) in liver and the activities of lactic dehydrogenase (LDH), transaminasaes (AST and ALT), and phosphatases (ACP and ALP) in liver and serum showed significant increases following all the treatments and bifenthrin was the potent one. Regarding the genotoxicity of the tested pesticides, the number of structural aberrations induced by the different treatments was enumerated in the present study. It was found that all the tested pesticides significantly increased either the frequency of abnormalities or the number of polychromatic erythrocytes (PCE) per 1000 cells (the frequency of micronucleus, MN) compared to the negative control, where bifenthrin and temephos were found to be more potent than cyclophosphamide (positive control) to induce these structural aberrations. According to the present results, the tested concentrations of the tested pesticides could lead to a collapse of cellular homeostasis and changes in the biochemical and genetic parameters in the Egyptian toads which can be considered as indicators of environmental pollution by pesticides.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"4 ","pages":"Pages 125-134"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471422000092/pdfft?md5=a3880a056e2b3bdb19ccc1442ddbc268&pid=1-s2.0-S2589471422000092-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90342271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrological connectivity, surface water quality and distribution of fish species within sub-locations of an urban oxbow lake, East India","authors":"Shubhajit Saha ,&nbsp;Azubuike V. Chukwuka ,&nbsp;Dip Mukherjee ,&nbsp;Nimai Chandra Saha ,&nbsp;Aina O. Adeogun","doi":"10.1016/j.wsee.2022.04.001","DOIUrl":"10.1016/j.wsee.2022.04.001","url":null,"abstract":"<div><p>Ecological processes and distribution of biodiversity within river floodplains are driven by the hydrological regime of the area. The relationship between fish abundance/diversity and surface water quality at four impact points of the Sashadanga oxbow lake was examined based on hydrological connectivity (distance of lake sections from parent channel; density of buffer vegetation and hydrological phases of seasons). Fish sample populations (n = 1440) belonging to 10 orders showed greater numerical abundance in the pre-and post-flooding phases. Oxbow sites proximal to the parent channel showed higher comprehensive pollution index (CPI), higher dominance and lower species evenness during the pre-monsoon (minor flooding) and vice versa during the monsoon and post-monsoon (greater flooding periods). Diversity descriptors using curve/asymptote based on Hill’s numbers indicate significant site-specific fish diversity within the oxbow lake at different seasons. Discriminant analysis revealed that change in temperature, turbidity and concentration of inorganic nitrogen were significant predictors in differentiating the quality of the different sites of the lake. Principal component analysis (PCA) revealed that the relative abundance of each species order across sites was significantly influenced by changes in seasons and physicochemical parameters, and showed a weak association with the density of buffer vegetation at sites. Depending on the distance of oxbow areas to the parent channel, the combination of periodic flooding, riparian buffer and lake morphology define the degree of hydrological connectivity which in turn affects the composition and abundance of fish communities at different points of the lake.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"4 ","pages":"Pages 44-58"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S258947142200002X/pdfft?md5=8c1beb8a020b63f6f327e6f293ac153d&pid=1-s2.0-S258947142200002X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86849943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring biosorption properties of Litchi chinensis peel for a cationic dye Rhodamine 6G in Liquid/Solid phase system: Kinetics and equilibrium studies","authors":"P. Mercy Jasper ,&nbsp;S. Sumithra ,&nbsp;S. Jameer Ahammad ,&nbsp;M. Madakka","doi":"10.1016/j.wsee.2022.08.001","DOIUrl":"10.1016/j.wsee.2022.08.001","url":null,"abstract":"<div><p>The Rhodamine 6G (Rh6G), a cationic dye is actively being used as a potentially tracing dye in the field of biotechnology for immunological studies. The peel powder of <em>Litchi Chinensis</em> was employed in native condition to explore the sorption properties at different experimental conditions like initial dye concentration, contact time, dosage of biosorbent, temperature and pH. The detailed characteristics of <em>Litchi chinensis</em> peel before and after adsorption were performed by using sophisticated instruments like SEM-EDX, FTIR, BET and XRD. From the adsorption studies it was observed that the equilibrium data followed Pseudo-second order rate kinetics and Freundlich isotherm. The Langmuir adsorption capacity (Q_o) was found to be 6.66 mg/g, and the adsorption process was spontaneous and exothermic in nature (based on ΔG, ΔH and ΔS values). All the laboratory experiments proven to be an evident for the <em>Litchi chinensis</em> peel as an efficient biosorbent for the removal of Rhodamine 6G in the liquid/solid phase system.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"4 ","pages":"Pages 66-72"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471422000043/pdfft?md5=74e069be941c006e3a24f18c8359c602&pid=1-s2.0-S2589471422000043-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73067423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of applying imazapyr on the control of Spartina alterniflora and its eco-environments in the Yellow River Delta, China","authors":"Xue Mo ,&nbsp;Jingqiu Chen ,&nbsp;Yueyan Pan ,&nbsp;Mingxiang Zhang ,&nbsp;Zhenming Zhang ,&nbsp;Jiakai Liu","doi":"10.1016/j.wsee.2022.11.002","DOIUrl":"10.1016/j.wsee.2022.11.002","url":null,"abstract":"<div><p>The invasion of <em>Spartina alterniflora</em> has threatened and damaged coastal wetlands in China, therefore, control and removal of this severe invasive plant are urgently needed. Green chemical control is an effective and low-cost method that can be used for large-scale removal of invasive specie. To study the control effect of imazapyr on <em>S. alterniflora</em> and evaluate its impact on other species and the wetland environment, a control experiment was set up in the Yellow River Delta Reserve in Shandong Province in May 2021. A total of 9 treatments were set up in the experiment: 25 % (W) imazapyr water (main agent), three treatments with dose gradients of 3.0, 6.0, and 9.0 L/acre, and the main agent at a dose of 6.0 L/acre with six treatments of AGE 809 (adjuvant A) and AGE 852 (adjuvant B) with dose gradients of 1.3, 2.6, and 5.2 L/acre, respectively. The results showed that after 60 days of application, the control efficiency of <em>Spartina alterniflora</em> was over 90 %, and the residual amount was small in the plots with the main agent additive &lt; 6.0 L/acre. Among them, the residues on leaves were 0.499 ∼ 2.822 mg/kg, the residues in soil ranged from 0.0012 to 0.0714 mg/kg, and were from not detected in water to 8.8E-4 mg/kg. During the experiment, there were significant differences in soil physicochemical properties among different treatments, and imazapyr significantly affected on the availability of soil C, N, and P at the stage of large chemical residues (<em>P</em> &lt; 0.05). In addition, imazapyr was not toxic to the benthic community and increased from 168.72/m³ to 633.75/m³ in 60 days after spraying. This study provides a theoretical basis, data support, and technical support for applying herbicides to control <em>S. alterniflora</em> in coastal wetlands of China.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"4 ","pages":"Pages 211-218"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471422000134/pdfft?md5=e190b77ce7126f447e15ca3879cb2860&pid=1-s2.0-S2589471422000134-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78083721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Contamination by heavy metals from mining activities: An ecological impact assessment of Mura and Kimpulande Rivers, Democratic Republic of the Congo","authors":"Alex Banze wa Mutombo ,&nbsp;Emmanuel K. Atibu ,&nbsp;Jean Mbuya wa Mutombo ,&nbsp;Emery M. Kalonda ,&nbsp;Elysée N. Bakatula ,&nbsp;Valentin N. Kanda ,&nbsp;Ruben K. Koy ,&nbsp;Crispin K. Mulaji ,&nbsp;Fernando P. Carvalho ,&nbsp;John Poté","doi":"10.1016/j.wsee.2022.10.004","DOIUrl":"10.1016/j.wsee.2022.10.004","url":null,"abstract":"<div><p>The contamination levels and distribution of heavy metals were assessed in riverbed sediments and water column samples from Mura and Kimpulande Rivers, both impacted by copper-cobalt and gold mining activities. Analyses were performed using inductively coupled plasma-mass spectrometry (ICP-MS), atomic absorption spectrometry (AAS), and atomic fluorescence spectrometry (AFS). Results showed high concentrations of Ni, Cu, Zn, As, Cd, and Hg in water samples. The concentrations of As, Cd, and Hg in water from both rivers exceeded the limits set in Democratic Republic of the Congo (DRC) legislation on requirements for mine water discharges. High concentrations were found also for Cu, Cr, Zn, As, Cd, Pb, and Hg in river sediments and were assessed against sediment quality guidelines for the protection of aquatic life. The Enrichment factor (EF) and the Geoaccumulation index (Igeo) values revealed extremely severe enrichment of Cu, Co, As, and Cd and extreme pollution by Cu and Co in sediment samples demonstrating high contamination of these rivers. The results from calculated ecologic risk factors revealed that aquatic ecosystems in the investigated rivers are at risk. Therefore, a review of current mining practices is needed and the urgent enforcement of good practices is recommended in order to protect the environment and public health.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"4 ","pages":"Pages 148-157"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471422000110/pdfft?md5=51a9d0d44522bf6191af12d6599c8479&pid=1-s2.0-S2589471422000110-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79075530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Metal accumulation in two crab species from the Woji Creek (Nigeria) and human health risk assessment due to crab consumption: Callinectes sapidus and Cardisoma armatum","authors":"Owhonda Chikeru Ihunwo ,&nbsp;Millicent Uzoamaka Ibezim-Ezeani ,&nbsp;Amir Reza Shahabinia ,&nbsp;Mark Obinna Onyema ,&nbsp;Prince Chinedu Mmom ,&nbsp;Estefanía Bonnail","doi":"10.1016/j.wsee.2022.11.003","DOIUrl":"10.1016/j.wsee.2022.11.003","url":null,"abstract":"<div><p>This study evaluates the concentrations of Cd, Cr, Pb, Ni, As and Cu in water, sediment and tissues (gill, muscle, hepatopancreas) of two crab species (<em>Callinectes sapidus</em> and <em>Cardisoma armatum</em>) collected from the Woji Creek in Niger Delta, Nigeria. As well as the health risk of consuming the crabs was determined. Mean values of metals in surface water revealed concentrations (mg/L) of a trend of Pb (3.252) &gt; Cu (2.328) &gt; Cr (1.590) &gt; Cd (0.146) &gt; Ni (0.109) and in sediments, the trend was in the order Pb (140.930) &gt; Ni (37.481) &gt; Cr (29.984) &gt; Cu (21.001) &gt; Cd (8.910). Hepatopancreas of the crabs accumulated higher concentrations of Cd and Pb; with mean concentrations of Cd and Pb of 0.110 ± 0.008 mg/kg and 1.364 ± 0.060 mg/kg in <em>Callinectes amnicola</em>, and 0.112 ± 0.008 mg/kg and 0.735 ± 0.026 mg/kg in <em>Cardisoma armatum</em> respectively. In the tissues of the three crab species, Pb and Cr were highest; while As was very low in the crab species. The HI was below 1 for males and females (adults and children) which indicates no risk to health from consumption of the edible crab species. Although the risk due to the consumption of these is low, they could be a dietary source of chronic doses of metals to humans.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"4 ","pages":"Pages 169-176"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471422000146/pdfft?md5=f6e86e1a78ce2a00eb0efad972fa6068&pid=1-s2.0-S2589471422000146-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75430735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of ecosystem health status using benthic diversity as tools in coastal sediments off the South West Coast, India","authors":"D.B. Arya ,&nbsp;Prince S. Godson ,&nbsp;Salom Gnana Thanga Vincent ,&nbsp;P. Selvaraj ,&nbsp;S. Krishnakumar ,&nbsp;N.S. Magesh","doi":"10.1016/j.wsee.2022.10.003","DOIUrl":"10.1016/j.wsee.2022.10.003","url":null,"abstract":"<div><p>The southwest coast of India is densely populated and experiences a wide range of natural and anthropogenic pressures. The diversity of macro and meiobenthos was documented in order to assess the ecosystem health of an anthropogenically impacted coastal ecosystem for the first time along the southwest coast of Tamil Nadu. Offshore sediment and water samples (n = 63) were collected from 14 sampling stations using the grid sampling method. Water and sediment samples were analysed for environmental variables such as pH, temperature, electrical conductivity (EC), total dissolved solids (TDS), salinity, sulphate, dissolved oxygen (DO), carbohydrate (CHO), protein, lipid, labile organic matter (LOM), total organic carbon (C_org), total organic matter (TOM) and sediment texture. Benthic macro and meiobenthos were isolated and identified using standard identification keys. A total of 5 phyla of macrobenthos with 29 species and 5 phyla of meiobenthos with 60 species were identified in the study area. Relative abundance analysis showed that the largest numbers of species belonged to Polychaeta for macrobenthos and foraminifera for meiobenthos. Redundancy analysis indicated that sediment carbohydrate content was the highest determining factor for explaining variation in the diversity of benthos. AMBI &amp; M−AMBI results revealed that among the 14 stations, 2 were categorized as “poor” and 9 as “bad”. Multiple anthropogenic activities in the coastal environment leading to increased organic matter input have resulted in a decline in the ecosystem health of this region, which warrants site-specific management to control organic pollution.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"4 ","pages":"Pages 135-147"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471422000109/pdfft?md5=4f0a8d2eb2a45c91805dcecd7f4a51ea&pid=1-s2.0-S2589471422000109-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77476027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bioaccumulation of heavy metals in edible tissue of crab (Scylla serrata) from an estuarine Ramsar site in Kerala, South India","authors":"E. Sherly Williams ,&nbsp;V. Lekshmi Priya ,&nbsp;L. Razeena Karim","doi":"10.1016/j.wsee.2022.06.001","DOIUrl":"10.1016/j.wsee.2022.06.001","url":null,"abstract":"<div><p>Wetlands are under severe threat due to anthropogenic activities and pollutants. Many pollutants such as heavy metals may accumulate to a hazardous level. In the present study, <em>Scylla serrata</em>, the mud crab and associated sediments were collected from three sites of Ashtamudi lake, the Ramsar site, to investigate the bioaccumulation of heavy metals Cadmium, Chromium, Copper, Lead and Zinc. Elemental analysis in the sediment sample showed that Cadmium and Chromium were found to be above USEPA and CCME limits and Copper was found to be above CCME limit on site 1. In site 2, Chromium was found to be above USEPA and CCME limits. In all the three sites, Lead and Zinc are below the permissible limit. Bioaccumulation status of heavy metals in the muscle of Scylla serrata with respect to the sites are in the order of site 1 &gt; site 2 &gt; site. The heavy metals Cadmium, Chromium and Lead were found to be above the permissible limit in site 1 and site 2, whereas Copper and Zinc concentrations in the muscle of crab from Ashtamudi wetland are below levels of concern for human consumption. A number of histological alterations such as splitting of muscle fibres, focal area of necrosis and muscular oedema were noticed in the samples. The result clearly indicates the fact that <em>S. serrata</em> undergoes intensified stress, when exposed to heavy metal contamination. Knowledge of metal concentrations in shell fish and fin fish are important both with respect to nature management and human consumption of fish.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"4 ","pages":"Pages 59-65"},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471422000031/pdfft?md5=4f7feb9809effc0888fb4fe77de75bfb&pid=1-s2.0-S2589471422000031-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89612725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}