Watershed Ecology and the Environment最新文献

{"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}

{"title":"Impact of earthquake on river water quality based on combination of satellite data and groundwater analysis","authors":"K. Jafarpour ,&nbsp;K. Leangkim ,&nbsp;Aznah N. Anuar ,&nbsp;Ali M. Yuzir ,&nbsp;Faizah C. Ros ,&nbsp;Nur F. Said ,&nbsp;Jun Asanuma","doi":"10.1016/j.wsee.2024.05.003","DOIUrl":"10.1016/j.wsee.2024.05.003","url":null,"abstract":"<div><p>The impact of an earthquake on river water quality is massive, and the quality of life and environment typically changes as a result of a quick drop in the environment system. A 6.0 magnitude earthquake struck the Ranau area of Sabah, Malaysia, in 2015, affecting the Liwagu River’s water quality. Satellite data on earthquakes, coupled with local water quality data collecting, allows for an accurate assessment of water quality parameters. As a result, the Sabah Water Department provided secondary water quality data from Bambangan and Kimolohing on the Liwagu River. Following that, turbidity, color, pH, electric conductivity (EC), total dissolved solids (TDS), dissolved oxygen (DO), nitrate (NO₃⁻), iron (Fe), manganese (Mn), aluminum (Al), alkalinity, hardness, chloride (Cl-), and sulfate (SO₄²⁻) were chosen. The investigation discovered unusually high turbidity and color in the water on June 17, 2015, as well as elevated levels of Al, Fe, and Mn. DO concentrations plummeted to 3.8 mg/L on the same day. Statistical analyses, employing the Kruskal-Wallis test, identified significant parameters—Fe (0.001) and Mn (0.001) at both stations, turbidity (0.001), and color (0.003) in Kimolohing, and Al (0.027) in Bambangan. Recovery in water quality took two weeks to two months, with iron and manganese requiring over six months for restoration. The earthquake didn’t solely dominate the impact but altered pollution sources to the river. The discussion highlights the synthesis of spatial and temporal dynamics enabled by the integration of ground and satellite data. This approach not only refines retrospective analyses but also propels us into predictive modeling, enhancing preparedness for future seismic events. The study’s holistic environmental impact assessment extends beyond water quality, unraveling cascading effects on ecosystems, soil, and vegetation. Informed decision-making for sustainable resource utilization emerges as a pivotal outcome, emphasizing the interconnectedness of seismic activity, rainfall patterns, and water quality. The study serves as a blueprint for future environmental assessments, emphasizing multifaceted approaches to understand and mitigate the complex impacts of seismic events on water resources.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 114-124"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471424000056/pdfft?md5=719579a5f7cfe36de04df4bcee00947a&pid=1-s2.0-S2589471424000056-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141390556","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":"Thermal stratification and mixing of dam reservoirs in Iran","authors":"Roohollah Noori ,&nbsp;Mojtaba Noury ,&nbsp;Maryam Khalilzadeh Poshtegal ,&nbsp;Masoud Sadrinasab ,&nbsp;Mehran Mahdian ,&nbsp;Rabin Bhattarai ,&nbsp;Mohammad Moradi ,&nbsp;Soroush Abolfathi","doi":"10.1016/j.wsee.2024.07.002","DOIUrl":"10.1016/j.wsee.2024.07.002","url":null,"abstract":"<div><p>Although numerical water quality models offer valuable insights into thermal stratification (TSn) and mixing dynamics in lakes, they are often resource and time consuming, limiting their applications for investigating a large number of lakes over a wide geographical area. An alternative approach is using well-known thermal classification systems, which require minimum data to provide acceptable information on TSn and mixing patterns in lakes. This study investigates the TSn and mixing regimes in 198 dam reservoirs located in Iran, using Lewis’s method for analysis. The results highlight that all 198 investigated reservoirs in Iran can be represented by six out of eight possible thermal classifications. The majority of the northeastern reservoirs are categorized as “warm monomictic”. For the reservoirs located in the north and northwest regions, all six thermal classes are observed. However, in the southern part of Iran, only the reservoirs of “continuous warm polymictic”, “warm monomictic”, and “discontinuous cold polymictic” types are located. Our findings reveal that 35.4%, 21.2%, 17.2%, 13.1%, 6.6%, and 5.6% of the investigated reservoirs were classified as “warm monomictic”, “discontinuous cold polymictic”, “continuous cold polymictic”, “dimictic”, “discontinuous warm polymictic”, and “continuous warm polymictic”, respectively. Our results can provide authorities with initial insights for further in-depth studies and decision-making into water quality management in Iran and enhancement strategies for the reservoirs in the country.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 138-145"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S258947142400010X/pdfft?md5=07f021f91d4850a093b7d32e60605b02&pid=1-s2.0-S258947142400010X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141839402","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":"Flash flood susceptibility mapping of north-east depression of Bangladesh using different GIS based bivariate statistical models","authors":"Md. Sharafat Chowdhury","doi":"10.1016/j.wsee.2023.12.002","DOIUrl":"https://doi.org/10.1016/j.wsee.2023.12.002","url":null,"abstract":"<div><p>Flash flood causes severe damage to the environment and human life across the world, no exception is Bangladesh. Severe flash floods affect the northeastern portion of Bangladesh in the early monsoon and pose a serious threat to every aspect of socioeconomic development and environmental sustainability. To manage the threat and reduce flood loss, the map of flash flood susceptible zones plays a key role. Thus, the aim of this research is to map the flash flood-susceptible areas of the northeastern haor areas of Bangladesh utilizing GIS-based bivariate statistical models. The models utilized are frequency ratio (FR), weights of evidence (WoE), certainty factor (CF), Shanon’s entropy (SE) and information value (IV). Among the 250 identified flash flood locations, 80 % data was used for training purposes and 20 % data for testing purposes. Eleven selected conditioning factors of flash flood include elevation, slope, aspect, curvature, TWI, TRI, SPI, distance to stream, stream density, rainfall and physiography. The calculated weights are assigned to the conditioning factors using ArcGIS environment to prepare the final flash flood maps. Results of AUC of ROC indicate WoE (success rate = 0.833 and prediction rate = 0.925) is the best model for flash flood susceptibility mapping followed by FR (success rate = 0.828 and prediction rate = 0.928) and SE (success rate = 0.827 and prediction rate = 0.923). According to the models, topographic (flat area) and hydrologic factors significantly control flash flood occurrence in the study area. The prepared flash flood susceptibility maps will be helpful for disaster managers and haor master planners of the study area.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 26-40"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471423000311/pdfft?md5=02d0e2d93eb669f0a20283a8462142e6&pid=1-s2.0-S2589471423000311-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139436007","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":"Dynamics and microbial characteristics of nitrogen and carbon in saline-alkali paddy soil under different fertilization","authors":"Xinyi Wang ,&nbsp;Baixing Yan ,&nbsp;Brian Shutes ,&nbsp;Mingming Wang ,&nbsp;Hui Zhu","doi":"10.1016/j.wsee.2024.06.002","DOIUrl":"https://doi.org/10.1016/j.wsee.2024.06.002","url":null,"abstract":"<div><p>The expansion of saline-alkali paddy fields, coupled with the application of large amounts of nitrogen (N) fertilizers, has given rise to a host of environmental concerns. While N and carbon (C) are vital indicators for assessing soil fertility, their dynamic characteristics in saline-alkali paddy soil remain obscure. To address this knowledge gap, we established paddy mesocosms with five distinct N-fertilizer treatments: control without N-fertilizer (CK), urea (U), urea with inhibitors (UI), organic–inorganic compound fertilizer (OCF) and C-based slow-release fertilizer (CSF). The objective was to monitor the dynamic changes of various N and soil organic-C (SOC) during a 137-day rice growing season, and to clarify the microbiological characteristics. By the end of the rice growing season, soil ammonia-N (NH₄⁺-N) concentrations were UI &gt; OCF &gt; CSF &gt; U &gt; CK, and UI had a significant difference (<em>p</em> &lt; 0.05) with all the other four treatments. Soil nitrate-N (NO₃⁻-N) concentrations in OCF and CSF treatments were 5.64 ± 1.25 mg kg⁻¹ and 6.81 ± 0.29 mg kg⁻¹, respectively, significantly (<em>p</em> &lt; 0.05) higher than U and UI treatments. NH₄⁺-N showed a negative correlation with NO₃⁻-N regardless of the N-fertilizer types, and a significant (<em>p</em> &lt; 0.01) positive relationship with alkali-hydrolyzable N (AHN). A significant (<em>p</em> &lt; 0.01) positive relationship existed between total-N (TN) and Bacteria 16S rRNA gene. The SOC had a significant (<em>p</em> &lt; 0.05) positive relationship with <em>mcr</em>A gene. During the entire rice growing season, CSF treatment had lower mean TN and SOC concentrations than all the other treatments, and exhibited the highest TN and total organic-C (TOC) content in rice. In summary, the UI can increase the residual NH₄⁺-N in saline-alkali paddy fields, and the CSF is a better choice for growing rice.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 95-104"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471424000081/pdfft?md5=efa46b5b0c95d161794a803f2617d3a0&pid=1-s2.0-S2589471424000081-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141424187","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":"Effects of Spartina alterniflora control on soil carbon and nitrogen in coastal wetlands","authors":"Xiaoyue Song ,&nbsp;Yutong Wang ,&nbsp;Baoling Mei ,&nbsp;Xitao Zhang ,&nbsp;Peng Zheng ,&nbsp;Weimin Song ,&nbsp;Binbin Tian ,&nbsp;Qiqige ,&nbsp;Guangxuan Han ,&nbsp;Baohua Xie","doi":"10.1016/j.wsee.2024.03.002","DOIUrl":"https://doi.org/10.1016/j.wsee.2024.03.002","url":null,"abstract":"<div><p>The invasive species <em>Spartina alterniflora</em> has significantly disrupted the ecological stability of coastal wetland ecosystems. Consequently, its control has become an important aspect of coastal wetland conservation. When controlling <em>S. alterniflora</em>, it is imperative to assess the ecological impacts of control methods. In this study, the effects of different control methods, i.e. “mowing + flooding” (MF) and “mowing + plowing” (MP), on the soil carbon and nitrogen contents in coastal wetlands were investigated in the Yellow River Delta, China. The results showed that the contents of soil organic carbon, inorganic carbon, and total nitrogen in the MF area within 2 years after treatment were 2.03–3.93 g/kg, 13.74–16.06 g/kg, and 0.24–0.47 g/kg, respectively, which were 36.33 %–-199 %, 2.91 %–36.71 % and 115.42 %–212.09 % higher than that those in the CK area, respectively. The C/N ratio in the MF treatment was 6.98–8.54, which was 5.42 %–40.30 % lower than that in the CK treatment. The contents of soil organic carbon, inorganic carbon, and total nitrogen in the MP area were 1.52–2.3 g/kg, 13.07–14.94 g/kg, and 0.2–0.32 g/kg, respectively, which were 15.91 %–54.18 %, 0.97 %–15.56 % and 35.19 %–182.26 % higher than those in the CK area. The C/N ratio in the MP area was 14.72 %–46.79 % lower than that in the CK area. Correlation analysis revealed that the soil carbon and nitrogen contents in the MF area were significantly positively correlated with the soil water content and electrical conductivity, and the C/N ratio was significantly negatively correlated with the soil sand content. In the MP area, the soil carbon and nitrogen contents were affected by the soil water content and electrical conductivity. The soil organic carbon content was also significantly negatively correlated with soil pH and significantly positively correlated with soil clay content. The C/N ratio was significantly negatively correlated with the total nitrogen content. Overall, the effects of MF on the soil carbon and nitrogen content in coastal wetlands were greater than those of MP. Future studies need to pay attention to the changes in tidal hydrological processes to more accurately assess the impacts of the control of <em>S. alterniflora</em> on the overall carbon sink capacity of the intertidal zone.</p></div>","PeriodicalId":101280,"journal":{"name":"Watershed Ecology and the Environment","volume":"6 ","pages":"Pages 54-62"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2589471424000032/pdfft?md5=850d38487e026051b59783ce982b5dfe&pid=1-s2.0-S2589471424000032-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140138670","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}