Watershed Ecology and the Environment最新文献

{"title":"Asymmetric impacts of natural and anthropogenic factors on wetland landscape evolution in Fenhe River Basin, China","authors":"Chengjie Xie ,&nbsp;Yingzheng Zeng ,&nbsp;Xiaoyang Hao ,&nbsp;Zhonghua Ning ,&nbsp;Tian Xie","doi":"10.1016/j.wsee.2024.09.001","DOIUrl":"10.1016/j.wsee.2024.09.001","url":null,"abstract":"<div><p>In recent years, Fenhe River Basin (FRB) wetlands have been facing severe challenges due to climate change and human activities. It was of great significance to understand the dynamic changes of FRB wetlands and their driving factors for ecological protection. Based on the land use data, runoff, rainfall and GDP data of FRB from 1980 to 2020, the evolution characteristics and driving factors of wetland pattern in FRB were analyzed. The results showed that the wetland types in FRB mainly included paddy, reservoir, river, beach and marsh. Among them, natural wetlands accounted for 72.46 %, and constructed wetlands accounted for 27.53 %. The main types of wetlands in FRB were river, reservoirs and beach, which account for 92.26 % of the whole wetland area. However, the dominant position of reservoir patch was more obvious than the others during 1980–2020. Landscape index showed that the shape of landscape tended to be regular and became more fragmentation. The transfer between wetlands and other land use types mainly occurred in the northern and southern parts of the FRB, and the main conversion types were occurred between dry land and wetlands, grassland and wetlands. Both natural and human factors drove the evolution pattern of wetlands, but the emphases were different. Runoff had a significant effect on wetland pattern at landscape level, while rainfall had a more significant effect on wetland evolution at class level. Urbanization rate and GDP had important effects on the evolution of wetland pattern at both class and landscape levels.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 176-186"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471424000147/pdfft?md5=21688c8eeb2f9127fa7dae6b5c6b22c1&pid=1-s2.0-S2589471424000147-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142148576","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":"Poisoned for gold: Assessing the spatial extent of heavy metal contamination within the Tutua-Bura-Angoben Shelter Belt Forest Reserve in Ghana","authors":"Jeff Dacosta Osei ,&nbsp;Emmanuel Arhin ,&nbsp;Yaw A. Twumasi ,&nbsp;Lily Lisa Yevugah ,&nbsp;Louvis Boakye ,&nbsp;Peter Damoah-Afari ,&nbsp;Doris Saah ,&nbsp;Priscilla Badaweh Coffie","doi":"10.1016/j.wsee.2024.08.001","DOIUrl":"10.1016/j.wsee.2024.08.001","url":null,"abstract":"<div><p>The Tutua-Bura-Angoben Shelter Belt project in Ghana, aimed at combating desertification and land degradation, faces an unexpected threat from heavy metal contamination. This study investigates the levels and spatial distribution of arsenic (As), lead (Pb), copper (Cu), and zinc (Zn) within the forest reserve, focusing on the implications for environmental health and sustainable development goals (SDGs). Using Inductively Coupled Plasma Mass Spectrometry (ICP-MS), 195 soil samples from the forest reserve were analyzed for heavy metal concentrations. The results reveal significant contamination, with arsenic levels ranging from 3.19 to 138.63 ppm, and an alarming 26 % of the reserve exceeding the 20 ppm threshold for arsenic. Copper, lead, and zinc showed lower contamination levels, with mean concentrations of 13.83 ppm, 7.63 ppm, and 27.53 ppm, respectively. Spatial interpolation using kriging in ArcGIS highlighted localized hotspots of arsenic contamination, primarily influenced by nearby Artisanal Small-Scale Gold Mining (ASGM) activities. The study underscores the urgent need for targeted environmental management strategies, including stricter waste management protocols, sustainable mining practices, and community engagement to mitigate the contamination risks and preserve the ecological integrity of the Tutua-Bura-Angoben Shelter Belt.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 146-154"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471424000111/pdfft?md5=782b47549ba131ee2acb01eb6f86cc21&pid=1-s2.0-S2589471424000111-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142088790","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":"Unveiling the diets of Eurasian Curlew and Bar-tailed Godwit through droppings analysis on the west coast of India","authors":"T.R. Athira ,&nbsp;K.A. Rubeena ,&nbsp;K. Jishnu ,&nbsp;C.T. Shifa ,&nbsp;Omer R. Reshi ,&nbsp;A.P. Rashiba ,&nbsp;T. Jobiraj ,&nbsp;P. Thejass","doi":"10.1016/j.wsee.2024.09.002","DOIUrl":"10.1016/j.wsee.2024.09.002","url":null,"abstract":"<div><div>This study examines the population dynamics and dietary patterns of the near-threatened Eurasian Curlew and Bar-tailed Godwit along west coast of India, underscoring critical conservation issues. From 2010 to 2023, both species experienced significant declines, with peak abundances observed on sandy beaches, deviating from their usual mudflat and mangrove habitats. Analysing 231 droppings identified seven key prey types, with polychaetes and small crabs being most common in mangroves and mudflats, while Cosmonotus crabs were predominantly found on sand beaches. Species-specific prey preferences were evident, with Bar-tailed Godwits showing a significant association with polychaetes and medium crabs. The findings highlight the urgent need for habitat restoration, pollution reduction, and focused conservation efforts to ensure the resilience and survival of these critical shorebird species.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 187-194"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471424000159/pdfft?md5=e7991eda44987a8d9d9713d6fd2f0b5f&pid=1-s2.0-S2589471424000159-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312560","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":"Effect of burnt tire-ash (water-soluble fraction) on blood and histopathological markers in Clarias gariepinus","authors":"Adewale Adeolu ,&nbsp;Roseline Nwose ,&nbsp;Joshua Ekpenyong ,&nbsp;Md. Simul Bhuyan ,&nbsp;Elizabeth Tabi ,&nbsp;Stanley Iheanacho ,&nbsp;Johnny Ogunji","doi":"10.1016/j.wsee.2024.08.002","DOIUrl":"10.1016/j.wsee.2024.08.002","url":null,"abstract":"<div><p>Aquatic habitats serve as pollutant reservoirs and experience massive pollution disasters due to anthropogenic pressure. The effect of the Water-Soluble Fraction (WSF) of burnt tire ash (BTA) was investigated on <em>Clarias gariepinus</em> juvenile using blood biomarkers as well as liver and gill histology. The model fish were exposed to 5 % (0.56 g/L), 10 % (1.12 g/L) and 20 % (2.24 g/L) of 96-hr LC₅₀ (11.2 g/L) value of BTA sub-chronic doses during the experiment. Hematological indices, the liver, and gill histology were studied throughout the 28-day exposure study, which was followed by a 14-day post-exposure trial. The studies revealed that BTA-exposed fish had reduced red blood cells, packed cell volume, and hemoglobin levels with time, whereas white blood cells and leukocyte numbers increased. Concentration-dependent histopathologic abnormalities such as hyperplasia, telangiectasis, hemorrhage, desquamation, lamellar edema, and vacuolation were observed in the gill of the affected fish, in contrast to the control. Likewise, the presence of histopathologic abnormalities in the liver of BTA-exposed fish, such as vacuolar degeneration, hyperplasia, dilated portal vein, pyknotic nucleus formations, hypertrophy hepatocytes, and aggregated macrophages, was concentration-dependent. Following apparent histologic deformities that persisted in the tissues after recovery, healing from BTA exposure was only partial. <em>C. gariepinus</em> is an essential bioindicator of burnt tire ash’s ecotoxicological impact. Point and non-point traces of burnt-tire ash to the aquatic systems may harm aquatic animal species, thus necessitating preventative actions.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 155-164"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471424000123/pdfft?md5=1b2d5c6f1785148f0c73b1aeffef31ef&pid=1-s2.0-S2589471424000123-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122451","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":"Ecotoxicological status, source apportionment and human health risk assessment of potential toxic element in surface water and sediments of creeks along Bonny River, Nigeria","authors":"Omobolaji O. Afolabi ,&nbsp;Peter B. Okwori ,&nbsp;Olushola I.T. Yemi-Jonathan ,&nbsp;Elekwachi Wali ,&nbsp;Maureen C. Ugwu ,&nbsp;Chimzurum D. Ugwa ,&nbsp;Victoria O. Emelu ,&nbsp;Toochukwu T. Ugwuechendu ,&nbsp;Lilian C. Bosco-Abiahu ,&nbsp;Sunny O. Asomaku","doi":"10.1016/j.wsee.2024.06.001","DOIUrl":"https://doi.org/10.1016/j.wsee.2024.06.001","url":null,"abstract":"<div><p>Potentially toxic elements (PTEs) are naturally available in the environment; however, anthropogenic activities encourage their high concentration, posing environmental and human health risks. The ecotoxicological status, source apportionment and health risk assessment of PTEs (Iron (Fe), Nickel (Ni), Cadmium (Cd), Selenium (Se), Zinc (Zn), Lead (Pb), Chromium (Cr) and Copper (Cu)) in creeks (Fibiri and Iwoama) along Bonny River were examined through laboratory analysis (American Public Health Association standard), indicators and statistical techniques. The PTEs concentration of surface water and sediment for both creeks exceeded the WHO allowable limit, and the surface water trended as Cr &gt; Pb &gt; Fe &gt; Ni &gt; Cd &gt; Zn &gt; Cu &gt; Se for Fibiri creeks, Fe &gt; Cr &gt; Pb &gt; Ni &gt; Cd &gt; Zn &gt; Cu &gt; Se for Iwoama creek while the sediment trended as Fe &gt; Pb &gt; Ni &gt; Cr &gt; Zn &gt; Cd &gt; Cu &gt; Se for both creeks. The contamination factor (CF) of the creek’s sediment showed low CF (Zn and Cu), moderate CF (Ni, Pb and Cr) and very high CF (Fe and Cd), while risk index status ranged from low risk (Ni, Zn, Pb, Cr and Cu), moderate risk (Fe) and significantly high risk (Cd). The human health risk revealed that children could be exposed to potential non-carcinogenic effect (HI &gt; 1) with Zn (1.64 and 2.03), and the Total Carcinogenic Risk (TCR) for children indicated high carcinogenic risk (TCR &gt; 1 × 10⁻⁴) for Ni, Pb, Cr and Cd of the creeks’ environmental mediums. The similarity in the trend and status of the creeks suggested that both environments are exposed to similar anthropogenic activities impact.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 105-113"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S258947142400007X/pdfft?md5=1be187ecb2b3452261247180a8ad87b8&pid=1-s2.0-S258947142400007X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141481034","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":"Small scale wastewater treatment plant effluent influences on aquatic macroinvertebrate assemblage, functional feeding groups, and productivity","authors":"Kelli Alexandra Park Burnett ,&nbsp;William McMahan ,&nbsp;Shea Tuberty","doi":"10.1016/j.wsee.2024.10.002","DOIUrl":"10.1016/j.wsee.2024.10.002","url":null,"abstract":"<div><div>The purpose of this stream-scale study is to evaluate the impacts of minor wastewater treatment plant effluents (&lt;1 MGD) on low order headwater systems in the Southern Appalachian Mountains. Benthic macroinvertebrates, common cations and elements, and stream physicochemical parameters were measured in 5 reference and 3 effluent-impacted streams in western North Carolina. Aquatic invertebrates were collected using a modified North Carolina Department of Environmental Quality macroinvertebrate sampling protocol and keyed to the lowest possible taxonomic level and used to compute community biological index scores, diversity indices, and the percentage of trophic feeding guilds. Unlike those of reference sites, benthic communities in impacted streams did not strictly follow the River Continuum Concept predicted feeding group distributions or trends. Overall trends among impacted sites were variable and correlated to increased ion concentrations as well as increased nutrients and levels of primary production. Increased abundance and richness of collector-gatherers, decreased abundance of Ephemeroptera and Plecoptera, an increase in Trichoptera and Diptera taxa, and lower water quality as indicated by higher stream biological index scores downstream from effluent outfalls were found when compared to upstream control sites. Regression analyses found that temperature, discharge, conductivity, pH, and elevation variables best predicted shifts in several macroinvertebrate taxa metrics in reference verses impacted streams. Non-metric dimensional scaling plots showed that temperature, conductivity, and multiple dissolved ions significantly differentiate these sites. The results of this study are significant as they provide insight into how small-scale wastewater treatment plant effluents impact aquatic assemblages, ecosystem function, and health at the stream-scale. These findings promote why thorough consideration should be given to wastewater treatment plant design, location in the watershed headwaters, and legal regulation as anthropomorphic impact to the environment continues to expand.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 234-241"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142528024","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":"Karst topography: Formation, processes, characteristics, landforms, degradation and restoration: A systematic review","authors":"Belay Zerga","doi":"10.1016/j.wsee.2024.10.003","DOIUrl":"10.1016/j.wsee.2024.10.003","url":null,"abstract":"<div><div>Karst refers to any topography or landform that forms over soluble rocks. The classic karst landforms, which include enclosed depressions, sinking streams, and caves, are primarily generated by surface and subsurface waters dissolving rocks; mechanical erosion plays a secondary role. This review paper attempted to evaluate the Karst topography from an international standpoint, taking into account its creation, features, resultant landforms, denudation, and restoration. The systematic review of the literature, which has been shown to be a trustworthy approach, served as the foundation for this review article. The review shower that iypically, karst topography forms on evaporites, dolostones, limestones, and rock salt. Caves can contain significant paleontological, paleoenvironmental, and archeological remnants because they can serve as traps for surface material, shielding it from surface erosion. Karst cannot be produced solely by a significant amount of rock solubility. The best karst is developed by dense, massive, pure, and coarsely fractured rocks. Although karst terrain is most common in humid areas with carbonate rock, it can also be found in temperate, tropical, alpine, and polar climates. According to the Köppen-Geiger classification, arid climates account for approximately 34.2% of all carbonate rock areas worldwide. Cold climates account for 28.2%, moderate temperatures for 15.9%, tropical climates for 13.1%, and polar climates for 8.6% of the total. Ten percent of the Earth’s surface is made up of karst topography, and up to 25% of the world’s population depends on karst areas for their water supply, making an understanding of karst essential. The peculiarities of karst environments make them highly vulnerable to geohazards such as collapse and dropout dolines (sinkholes), slope movements, and floods. Karst areas are also extremely specialized habitats, with important and often very vulnerable subterranean ecosystems. The vulnerability of karst requires unique management and protection strategies to be devised to preserve this natural landscape for its future sustainability.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 252-269"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560732","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":"Upstream water management and its role in estuary health, evaluation of freshwater management and subtropical estuary function","authors":"Paul Julian II ,&nbsp;Leah Reidenbach","doi":"10.1016/j.wsee.2024.05.002","DOIUrl":"https://doi.org/10.1016/j.wsee.2024.05.002","url":null,"abstract":"<div><p>In highly modified and managed systems the balance of freshwater inputs discharged to estuarine systems are important to maintain salinity balances and thus estuarine function. However, the availability of freshwater is highly dependent on upstream water management to provide flood protection whilst meeting freshwater demand for people and the environment. In South Florida, water is managed by a water control plan with Lake Okeechobee at the center. Currently, water levels within the lake are managed based on the Lake Okeechobee Regulation Schedule of 2008. The new regulation schedule, Lake Okeechobee System Operating Manual (LOSOM), updates water management rules while attempting to balance the needs of downstream systems; salinity and water quality in the Caloosahatchee and Saint Lucie (northern) estuaries; and more water for the southern Everglades. This study evaluates LOSOM relative to ecologically significant performance measures for the northern estuaries. Overall, the proposed regulation schedule is expected to provide a more sustainable flow regime to the estuaries by reducing stressful and damaging discharge events. Moreover, new management rules combined with new infrastructure are expected to reduce low discharge events to the Caloosahatchee estuary and reduce stress on key indicator species such as <em>Vallisneria americana</em> during the wet season. This regulation schedule provides improved conditions for the estuaries at the expense of higher Lake Okeechobee stages. Future restoration and water management will maintain the benefits afforded to the estuaries while at the same time reducing the impacts to Lake Okeechobee resulting in a more sustainable and resilient system.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 84-94"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471424000068/pdfft?md5=07bd41bae60fbc7dfaa69a646c2d6717&pid=1-s2.0-S2589471424000068-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141242223","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":"Mercury removal by Aquarius palifolius (Nees & Mart.) Christenh. & Byng: Isotherms model, superoxide dismutase activity, and chlorophyll content","authors":"Dwi Umi Siswanti ,&nbsp;Dinda Ayuningtyas ,&nbsp;Shafira Nurulita Nugraheni ,&nbsp;Tsurayya Nurhanifah ,&nbsp;Himawan Tri Bayu Murti Petrus ,&nbsp;Eko Agus Suyono ,&nbsp;Budi Setiadi Daryono","doi":"10.1016/j.wsee.2024.10.001","DOIUrl":"10.1016/j.wsee.2024.10.001","url":null,"abstract":"<div><div>Mercury is one of the heavy metals that became a global threat in this industrialization era. Artisanal and Small-Scale Gold Mining activities are the leading cause of this mercury pollution. Sustainable and environmentally friendly methods can be a solution to overcome this problem. Bioremediation methods use plants with defense mechanisms against mercury, namely Mexican sword plants or <em>Aquarius palifolius</em>, which is a promising solution. This research aimed to analyze the isotherm model of mercury content in <em>A. palifolius</em> in the Free Water Surface-Constructed Wetland (FWS-CW) reactor using the Langmuir and Freundlich isotherm equations; analyzed the activity of antioxidant enzymes in <em>A. palifolius</em> such as Superoxide dismutase (SOD); and also analyzed the effect of mercury stress on chlorophyll levels in <em>A. palifolius</em>. This research shows that the mercury phytoremediation process by <em>A. palifolius</em> is more suitable with the Langmuir isotherm model. There are no significant differences in SOD activity and chlorophyll levels between <em>A. palifolius</em> with and without mercury concentration. This indicates that <em>A. palifolius</em> is a hyperaccumulator plant that can survive in mercury stress conditions and even remove mercury from contaminated water.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 227-233"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142441397","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":"Nonclassical Biomanipulation: PROS and CONS","authors":"Muhammad Amjad Yaqoob ,&nbsp;Xiyu Yang ,&nbsp;Zhenming Zhang ,&nbsp;Jiakai Liu","doi":"10.1016/j.wsee.2024.10.005","DOIUrl":"10.1016/j.wsee.2024.10.005","url":null,"abstract":"<div><div>Physical, chemical, and biological techniques can be used to manage eutrophication, a global environmental hazard that might worsen. Biomanipulation is an eco-friendly, cost-effective, and potentially profitable technology for ecological restoration. This review contrasts nonclassical biomanipulation, which uses planktivorous fish to reduce algal blooms, with classical biomanipulation, which employs piscivorous fish to indirectly increase zooplankton populations to manage eutrophication. Owing to certain challenges associated with classical biomanipulation, including the elimination of planktivorous fish, the increase in the number of macrophytes, and the decrease in phosphorus (internal as well as external), preference is given to nonclassical biomanipulation. In tropical lakes with high productivity, where reducing the concentration of nutrients is nearly impossible, nonclassical biomanipulation can also be utilized to control algal blooms. In both lakes and confined water bodies, nonclassical biomanipulation altered the phytoplankton composition at the beginning of the experiment. Using nonclassical biomanipulation, 63% of the 30 studies we reviewed revealed that phytoplankton were successfully controlled. In Lakes Donghu and Qiandaohu, two planktivorous fish, <em>Hypophthalmichthys molitrix</em> and <em>Hypophthalmichthys nobilis nobilis</em>, effectively suppressed Microcystis blooms. However, <em>H. molitrix</em> and <em>H. nobilis</em> are useful for controlling eutrophic environments that do not contain enough macrozooplankton. When large herbivorous zooplankton are unable to effectively suppress nuisance algal blooms, nonclassical biomanipulation has been proven to be an effective strategy; however, it is useless when nanophytoplankton species are blooming organisms. Furthermore, experiments are needed to fully understand the effectiveness of this technique, as environmental parameters such as region and season strongly impact the behavior of water bodies.</div></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 270-276"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586764","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}