Ecohydrology & Hydrobiology最新文献

Evaluation and valuation of tajan river basin ecosystem services 塔扬河流域生态系统服务的评价和估值

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-01-01 DOI: 10.1016/j.ecohyd.2024.03.005

Hamid Amirnejad , Sareh Hosseini , Hossein Azadi

Rivers as a blue ecosystem have a lot of ecosystem services that awareness of the value of their services will protect them as much as possible and communities will benefit from their environmental services. In this study, Tajan river basin ecosystem services in the north of Iran was valuated. To valuate, the choice experiment method was used to estimate willingness to pay. Tajan river basin ecosystem services attributes including regulating, supporting, provisioning and cultural services and a price attribute at three levels were determined. Data from 239 resident households of Mazandaran province were used in 2017. The empirical analysis did by the conditional logit model and mixed logit model. Also, multi criteria decision making including techniques Entropy, TOPSIS and SAW used for evaluating the role and importance of the Tajan river basin ecosystem services. The findings indicated that residents were willing to pay for the conservation of Tajan river basin ecosystem services, 13.77 USD per year. It was for regulating, supporting, provisioning and cultural services of Tajan river basin, 2.62, 6.30, 2.50 and 2.35 USD per year to move away from the status quo to the improvement status respectively. Also, findings of weighting and prioritization of Tajan river basin ecosystem services with TOPSIS and SAW methods showed that supporting and provisioning services had the highest weight for the evaluation Tajan river basin ecosystem services. In other words, the residents prefer the services as the most important Tajan river basin ecosystem services. Results showed that willingness to pay can be introduced as a useful tool to investigated people's preference for conservation of river basin ecosystem services under various activities. Therefore, by determining the value of river ecosystem services, community will understand that river services are of great importance, and the application of its value in calculations related to comprehensive management of basin water resources will provide a suitable economic solution to increase user utility the river.

{"title":"Evaluation and valuation of tajan river basin ecosystem services","authors":"Hamid Amirnejad , Sareh Hosseini , Hossein Azadi","doi":"10.1016/j.ecohyd.2024.03.005","DOIUrl":"10.1016/j.ecohyd.2024.03.005","url":null,"abstract":"<div><div><span>Rivers as a blue ecosystem have a lot of ecosystem services that awareness of the value of their services will protect them as much as possible and communities will benefit from their environmental services. In this study, Tajan river basin ecosystem services in the north of Iran was valuated. To valuate, the choice experiment method was used to estimate willingness to pay. Tajan river basin ecosystem services attributes including regulating, supporting, provisioning and cultural services and a price attribute at three levels were determined. Data from 239 resident households of Mazandaran province were used in 2017. The empirical analysis did by the conditional logit model and mixed logit model. Also, multi criteria decision making including techniques Entropy, TOPSIS and SAW used for evaluating the role and importance of the Tajan river basin ecosystem services. The findings indicated that residents were willing to pay for the conservation of Tajan river basin ecosystem services, 13.77 USD per year. It was for regulating, supporting, provisioning and cultural services of Tajan river basin, 2.62, 6.30, 2.50 and 2.35 USD per year to move away from the status quo to the improvement status respectively. Also, findings of weighting and prioritization of Tajan river basin ecosystem services with TOPSIS and SAW methods showed that supporting and </span>provisioning services<span> had the highest weight for the evaluation Tajan river basin ecosystem services. In other words, the residents prefer the services as the most important Tajan river basin ecosystem services. Results showed that willingness to pay can be introduced as a useful tool to investigated people's preference for conservation of river basin ecosystem services under various activities. Therefore, by determining the value of river ecosystem services, community will understand that river services are of great importance, and the application of its value in calculations related to comprehensive management of basin water resources will provide a suitable economic solution to increase user utility the river.</span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 1","pages":"Pages 238-249"},"PeriodicalIF":2.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141028072","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

Mitigating the exchange flux of sedimented phosphorus in invasive water Hyacinth (Pontederia crassipes) bloom system using a biogenic waste material 利用生物废料减轻入侵水葫芦（Pontederia crassipes）水华系统中沉积磷的交换通量

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-01-01 DOI: 10.1016/j.ecohyd.2024.01.004

N.A. Oladoja , Y.I. Bulu , J.O. Akinyeye , R.O. Ahmed , I.A. Ololade , J.A. Ogunniyi

Calcium rich materials have been studied as sediment capping agents, but the high cost and the potential toxicity of extraneous metal ion constituents have been identified as impediments to field-scale applications. Therefore, Gastropod shell (GS), a biogenic waste material predominated with calcium mineral phase is assessed as a sediment capping agent in P. crassipes bloom system. Using the overlying water and sediment samples collected from a P. crassipes bloom system, the P-binding capacity of thermally treated GS was evaluated. Two microcosm aquatic systems (i.e., oxic and anoxic systems), with GS amended and unamended sediment, were created. The systems were incubated for fifty (50) days and the temporal trend in the physicochemical characteristics, and nutrient exchange flux across the sediment-water interface were monitored. The proof-of-concept was tested using pot experiment in a screenhouse. The two reactive materials showed significant capacity to sequestrate both the aqueous and sediment phase P, but the GS₁₀₀₀ showed better performance. The GS amended sediment trapped the sedimented P, and precluded the release into the overlying water phase, but a significant increase in the pH value of the overlying water was noted. In the field trial, the GS₁₀₀₀ amended sediment mitigated the exchange flux of sedimented P, which led to the death of the P. crassipes within twenty-four (24) days. Further studies are recommended to ascertain the role of extreme pH value created by the sediment amendment on the growth profile of P. crassipes.

{"title":"Mitigating the exchange flux of sedimented phosphorus in invasive water Hyacinth (Pontederia crassipes) bloom system using a biogenic waste material","authors":"N.A. Oladoja , Y.I. Bulu , J.O. Akinyeye , R.O. Ahmed , I.A. Ololade , J.A. Ogunniyi","doi":"10.1016/j.ecohyd.2024.01.004","DOIUrl":"10.1016/j.ecohyd.2024.01.004","url":null,"abstract":"<div><div><span><span>Calcium rich materials have been studied as sediment capping agents, but the high cost and the potential toxicity of extraneous </span>metal ion constituents have been identified as impediments to field-scale applications. Therefore, Gastropod shell (GS), a biogenic waste material predominated with calcium mineral phase is assessed as a sediment capping agent in </span><em>P. crassipes</em> bloom system. Using the overlying water and sediment samples collected from a <em>P. crassipes</em> bloom system, the P-binding capacity of thermally treated GS was evaluated. Two microcosm aquatic systems (i.e., oxic and anoxic systems), with GS amended and unamended sediment, were created. The systems were incubated for fifty (50) days and the temporal trend in the physicochemical characteristics, and nutrient exchange flux across the sediment-water interface were monitored. The proof-of-concept was tested using pot experiment in a screenhouse. The two reactive materials showed significant capacity to sequestrate both the aqueous and sediment phase P, but the GS<sub>1000</sub> showed better performance. The GS amended sediment trapped the sedimented P, and precluded the release into the overlying water phase, but a significant increase in the pH value of the overlying water was noted. In the field trial, the GS<sub>1000</sub> amended sediment mitigated the exchange flux of sedimented P, which led to the death of the P. <em>crassipes</em> within twenty-four (24) days. Further studies are recommended to ascertain the role of extreme pH value created by the sediment amendment on the growth profile of P. <em>crassipes</em>.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 1","pages":"Pages 54-73"},"PeriodicalIF":2.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139636930","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

Different seasonal dynamics of contrasting aquatic plants and the consequences for the submerged macrophyte biodiversity 对比鲜明的水生植物的不同季节动态及其对水下大型生物多样性的影响

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-01-01 DOI: 10.1016/j.ecohyd.2024.03.003

Michał Brzozowski , Mariusz Pełechaty

Global warming shifts climate zones to the north, resulting in changes in biodiversity. One of the species adaptation strategies to survive is to change their phenology. In temperate climate, most aquatic plants show their peak of biomass in summer. In our study, we hypothesised that the rare charophyte Lychnothamnus barbatus and the partially invasive vascular plant Myriophyllum spicatum may apply a different seasonality and cause a decrease in the biodiversity of submerged macrophytes. The object of our study was a mesotrophic temperate lake in Western Poland with abundant submerged vegetation, where macrophyte seasonality was studied from November 2015 to November 2019 (autumn, spring, summer). Altogether, 29 taxa of plants were recorded, including 13 species of charophytes (40 % of the Polish charophyte flora) but only four species co-dominated, two eutrophic vascular plants, Ceratophyllum demersum and M. spicatum, and two charophytes, the rare mesotrophic L. barbatus and common Nitellopsis obtusa. M. spicatum due to its expansiveness in the shallow littoral decreased biodiversity in the study lake. Moreover, C. demersum negatively affected the endangered L. barbatus by direct competition for habitats in the lake. L. barbatus and M. spicatum dominated in vegetation in autumn while the further two species co-dominated in summer. L. barbartus and M. spicatum seem to avoid high competition in summer, which proves a high adaptive potential with respect to climate warming. However, further study in other lakes is needed to verify the relevance of our findings in terms of the conservation of rare macrophyte species.

{"title":"Different seasonal dynamics of contrasting aquatic plants and the consequences for the submerged macrophyte biodiversity","authors":"Michał Brzozowski , Mariusz Pełechaty","doi":"10.1016/j.ecohyd.2024.03.003","DOIUrl":"10.1016/j.ecohyd.2024.03.003","url":null,"abstract":"<div><div><span>Global warming shifts climate zones to the north, resulting in changes in biodiversity. One of the species adaptation strategies to survive is to change their phenology<span>. In temperate climate, most aquatic plants<span> show their peak of biomass in summer. In our study, we hypothesised that the rare charophyte </span></span></span><em>Lychnothamnus barbatus</em><span> and the partially invasive vascular plant </span><span><em>Myriophyllum spicatum</em></span> may apply a different seasonality and cause a decrease in the biodiversity of submerged macrophytes. The object of our study was a mesotrophic temperate lake in Western Poland with abundant submerged vegetation, where macrophyte seasonality was studied from November 2015 to November 2019 (autumn, spring, summer). Altogether, 29 taxa of plants were recorded, including 13 species of charophytes (40 % of the Polish charophyte flora) but only four species co-dominated, two eutrophic vascular plants, <span><em>Ceratophyllum demersum</em></span> and <em>M. spicatum</em>, and two charophytes, the rare mesotrophic <em>L. barbatus</em> and common <em>Nitellopsis obtusa. M. spicatum</em> due to its expansiveness in the shallow littoral decreased biodiversity in the study lake. Moreover, <em>C. demersum</em> negatively affected the endangered <em>L. barbatus</em> by direct competition for habitats in the lake. <em>L. barbatus</em> and <em>M. spicatum</em> dominated in vegetation in autumn while the further two species co-dominated in summer. <em>L. barbartus</em> and <em>M. spicatum</em> seem to avoid high competition in summer, which proves a high adaptive potential with respect to climate warming. However, further study in other lakes is needed to verify the relevance of our findings in terms of the conservation of rare macrophyte species.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 1","pages":"Pages 225-237"},"PeriodicalIF":2.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140405991","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

Controllability of soil loss and runoff using soil microorganisms: A review 土壤微生物对土壤流失和径流的可控性研究进展

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-01-01 DOI: 10.1016/j.ecohyd.2023.11.006

Seyed Hamidreza Sadeghi , Atefeh Jafarpoor , Mehdi Homaee , Sudabeh Gharemahmudli

Some arguments on the durability, dynamism, applicability, cost, and environmental aspects of chemical and physical additives confirm the general tendency to apply biological amendments for soil and water resource conservation. In this regard, the application of biological soil crusts is regarded as one of the biological and environmentally oriented methods to improve the soil hydrological behavior, cohesion, aggregation, and erodibility in such a way as to withstand destructive agents for soil and water loss. Despite general agreement on the beneficial effects of microorganisms in reducing soil loss and runoff, no unique conclusion has been drawn to minutely report the extension and consequences of applying soil microorganisms in soil and water conservation. In the current endeavor, out of too many reports found following insight searches in the public domains, 77 journal papers published from 1990 to 2023 on the relationship between microorganisms on soil loss and runoff control were ultimately reviewed. Accordingly, the first successful research was reported in 2003. Our further inspections showed that more than 90 % of the investigations had been conducted in China, Spain, Iran, the United States, Palestine, and the west of the Jordan River. In 82 % of the internationally published investigations, the application of cyanobacteria for conserving soil and water resources has been either preferred or recommended. Overall, the outcome of our inspection showed that microorganisms have been effective in controlling runoff and soil loss, due to which a global increasing tendency to extend soil microorganisms-based approaches is seen for soil and water resources management.

关于化学和物理添加剂的耐久性、动态性、适用性、成本和环境方面的一些争论证实了应用生物改良剂来保持水土资源的总体趋势。在这方面，生物土壤结皮的应用被认为是一种以生物和环境为导向的方法，可以改善土壤的水文行为、凝聚力、聚集性和可蚀性，从而抵御水土流失的破坏剂。尽管普遍同意微生物在减少土壤流失和径流方面的有益作用，但没有得出独特的结论来详细报道土壤微生物在水土保持中的推广和后果。在目前的努力中，从公共领域的洞察力搜索中发现的太多报告中，最终审查了1990年至2023年发表的77篇关于微生物与土壤流失和径流控制之间关系的期刊论文。因此，2003年报道了第一次成功的研究。我们进一步的检查表明，90%以上的调查是在中国、西班牙、伊朗、美国、巴勒斯坦和约旦河西岸进行的。在国际上发表的82%的调查中，蓝藻应用于水土资源保护已被首选或推荐。总的来说，我们的研究结果表明，微生物在控制径流和土壤流失方面是有效的，因此，在全球范围内，基于土壤微生物的方法越来越多地用于土壤和水资源管理。

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引用次数: 0

Spatiotemporal mapping of groundwater recharge potential zones for physical planning process—A case of Ajmer City, India 为实际规划过程绘制地下水补给潜力区时空图--印度阿杰梅尔市的案例

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-01-01 DOI: 10.1016/j.ecohyd.2024.02.006

Vivekanand Tiwari , Atul Kumar , Mahua Mukherjee

Urban areas are growing with the growth in urban population and rapidly transforming the land use land cover (LULC), which is capable of affecting the potential of groundwater recharge at a spatial level. It is essential to recognize the complexities of urban growth along with dynamic and static natural parameters that influence the groundwater recharge in the urban region. No substantial inclusion of Groundwater Recharge Potential Zones (GWRPZ) is evident in contemporary master plans of Indian cities, resulting in a declining trend of groundwater tables with increasing dependency. The study discusses temporal changes in the urban LULC of Ajmer City in the State of Rajasthan in India and its impact on the overall Groundwater Recharge Potential Zone over a duration. Nine physical parameters, geology, lithology, geomorphology, lineament density, slope, drainage density, groundwater table, LULC and Rainfall, are used as thematic layers along with their subclasses. The Multi-criteria Decision Analysis of AHP and Weighted Overlay Analysis in GIS are applied to analyze variations at the spatial level on a temporal basis. In addition, Geostatistical techniques such as Empirical Bayesian Kriging (EBK) and Inverse Distance Weightage (IDW) are also applied to interpolate and analyze the thematic layers of the Groundwater table and Rainfall, respectively. The study delineates and analyzes the spatiotemporal variations in the GWRPZs. The confusion matrix method is also applied for validation and accuracy, which is crucial for rationalizing the water-sensitive physical planning process and instrumental in formulating suitable strategies and guidelines for preserving, managing, and retrofitting the groundwater recharge zones at the urban level in the Indian scenario.

随着城市人口的增长，城市地区也在不断扩大，并迅速改变着土地利用和土地覆盖（LULC），这在空间层面上影响着地下水的补给潜力。必须认识到城市发展的复杂性，以及影响城市地区地下水补给的动态和静态自然参数。在当代印度城市的总体规划中，地下水补给潜力区（GWRPZ）没有被大量纳入，导致地下水位呈下降趋势，依赖性不断增加。本研究讨论了印度拉贾斯坦邦阿杰梅尔市城市 LULC 的时间变化及其对整个地下水补给潜力区的影响。地质、岩性、地貌、线状密度、坡度、排水密度、地下水位、LULC 和降雨量这九个物理参数及其子类被用作专题图层。应用 GIS 中的 AHP 多标准决策分析和加权叠加分析来分析空间层面的时间变化。此外，还应用了经验贝叶斯克里金法（EBK）和反距离加权法（IDW）等地质统计技术，分别对地下水位和降雨量专题图层进行插值和分析。该研究划分并分析了 GWRPZ 的时空变化。研究还采用了混淆矩阵法来验证其准确性，这对合理化水敏感物理规划过程至关重要，并有助于制定适当的战略和指导方针，以保护、管理和改造印度城市一级的地下水补给区。

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引用次数: 0

Abundance and community structure of comammox bacteria in the rhizosphere of aquatic plants in an urban eutrophic lake 城市富营养化湖泊中水生植物根瘤菌的丰度和群落结构

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-01-01 DOI: 10.1016/j.ecohyd.2024.02.008

Mingzhi Zhou , Rong Du , Ziyan Lei , Shuang Liu , Jianwei Zhao

Different from ammonia oxidizing archaea and ammonia oxidizing bacteria, complete ammonia oxidation (comammox) bacteria can directly oxidize ammonia to nitrate. Hence, it is necessary to clarify the distribution of comammox bacteria in water bodies. Aquatic plants, whose roots can provide favorable conditions for nitrification, are often used to remediate polluted lakes. This study investigated the community structure of comammox bacteria in the rhizosphere of four aquatic plants in Lake Yuehu, an urban eutrophic lake. The results showed that the abundance of comammox bacteria in the near-rhizosphere of most aquatic plants was higher than that in the far-rhizosphere, suggesting that the aquatic plants promote the rhizosphere abundance of comammox bacteria in eutrophic lakes. Both clade A and clade B of comammox bacteria were present in the Lake Yuehu, with the former showing greater dominance. Co-occurrence network analysis revealed that two subclades of clade A had opposite network parameters in the near-rhizosphere and far-rhizosphere. Redundancy analysis (RDA) analysis showed that OM, pH and NO₂^--N of sediment were correlated with the abundance of comammox bacteria, which were the main environmental factors affecting the growth of this microorganism. These results suggest that aquatic plants affected the distribution and diversity of comammox bacteria in sediments, which may result in changes in the process of ammonia oxidation and eutrophication in water.

与氨氧化古细菌和氨氧化细菌不同，完全氨氧化细菌可直接将氨氧化为硝酸盐。因此，有必要明确氨氧化细菌在水体中的分布情况。水生植物的根系能为硝化作用提供有利条件，因此经常被用来修复受污染的湖泊。本研究调查了城市富营养化湖泊月湖中四种水生植物根圈中兼氧菌的群落结构。结果表明，大多数水生植物近根瘤菌的丰度高于远根瘤菌，表明水生植物促进了富营养化湖泊中根瘤菌的丰度。comammox 细菌的 A 支系和 B 支系均存在于月湖中，前者占优势。共现网络分析显示，支系A的两个亚支系在近根圈和远根圈的网络参数相反。冗余分析（RDA）分析表明，OM、pH 和沉积物的 NON 与 comammox 细菌的丰度相关，是影响该微生物生长的主要环境因素。这些结果表明，水生植物影响了沉积物中comammox细菌的分布和多样性，从而可能导致氨氧化过程的变化和水体富营养化。

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引用次数: 0

Allometric determinations in the early development of Schoenoplectus californicus to monitor nutrient uptake in constructed wetlands 测定加州蝶形花早期发育的等比数列，以监测人造湿地的营养吸收情况

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-01-01 DOI: 10.1016/j.ecohyd.2023.11.013

Wilma A. Arce , Dario Achá

Studies of Schoenoplectus californicus focus on the development of aboveground biomass estimations. However, below-ground assessments are important for net primary productivity monitoring in wetlands. This study aims to monitor nutrient assimilation by developing allometric models for above and below-ground biomass estimation of S. californicus in constructed wetlands. The plants we evaluated were grown in vitro, allowing us to control the experimental conditions. The results show that shoot length and apex diameter are significant parameters for building our models. Two non-destructive allometric equations were established to predict above and below-ground biomass and the models were highly significant (R² = 0.79 and 0.49, p < 0.001). During active growth, both the aboveground and below-ground components showed to be essential for removing nutrients from the water. Both non-destructive equations allowed the monitoring of biomass accumulation in constructed wetlands for seven months, demonstrating that this low-cost method can be used to evaluate the performance of wetlands for wastewater.

对加州蝶形花（Schoenoplectus californicus）的研究主要集中在地上生物量的估算上。然而，地下评估对于湿地净初级生产力监测非常重要。本研究旨在通过开发异速模型来估算建构湿地中加州梭梭的地上和地下生物量，从而监测养分同化情况。我们评估的植物是离体生长的，因此可以控制实验条件。结果表明，嫩枝长度和顶端直径是建立模型的重要参数。我们建立了两个非破坏性的等比数列来预测地上和地下生物量，模型非常显著（R2 = 0.79 和 0.49，p <0.001）。结果表明，在生长旺盛期，地上部分和地下部分对从水中清除营养物质都至关重要。这两种非破坏性方程可对建造湿地中生物量的积累进行长达七个月的监测，表明这种低成本方法可用于评估废水湿地的性能。

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引用次数: 0

The synergistic effect of abiotic microbes in a standardized aquaponics system for the production of high-value fish and plant biomass 标准化鱼菜共生系统中非生物微生物对生产高价值鱼类和植物生物量的协同效应

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-01-01 DOI: 10.1016/j.ecohyd.2024.01.005

Karuppusetti Jayaprakash , Manickam Muthuselvam , Karuppaiah Nanthini Devi , Perumal Santhanam , Sundarraj Dinesh Kumar , Shanmugam Gunabal , Nagarajan Krishnaveni , John Roopavathy , Annamalai Aravinth , Sundaramoorthy Dhanasundaram , Pachiappan Perumal

Aquaponics is an attempt to control water quality such that all living beings (fish, plants, and bacteria) can live. In this study, the tilapia fish, Oreochromis niloticus, and the plants, mustard (Brassica nigra) and millet (Pennisetum glaucum), were raised in a low-cost aquaponics system (Nutrient Film Technique or NFT). The study also examined the microbial load and various water quality parameters. According to the USEPA rules, the water quality attributes of NFT have to be stable. During different culture periods, the growth rate of fish in the NFT system was gradually increased significantly (p < 0.01). The ANOVA analysis revealed that the recorded biochemical-values of NFT-raised fishes were less significant (p < 0.04) (than control fishes). When compared to the NFT-grown mustard plant, the biochemical content of NFT-raised millet plant was significantly lower (p < 0.003). Currently, the phytochemical content has been found to be high in NFT grown plants. Chlorophyll 'a' level was high (8.17 mg) in NFT and low (2.34 mg) in controls. The maximum chlorophyll 'b' level in plants produced using NFT was 8.45 mg, whereas the lowest (0.84 mg) was recorded in control plants. Carotenoid concentration was high (707 mg) in plants cultivated using NFT, but low (239 mg) in control plants. Furthermore, when compared to the control (24 colonies), the NFT produced the greatest number of microbial colonies (57 colonies) at 10⁻⁴dilution. Thus the adoption of NFT techniques shows its usefulness in terms of reduced cost and water usage and the reduction in microbial load (when fish and plants are raised together). Therefore, this research-output supports the potential of NFT-technology as an integrated aquaculture approach for future.

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引用次数: 0

Data limitations in developing countries make river restoration planning challenging. Study case of the Cesar River, Colombia 发展中国家的数据限制使河流修复规划工作面临挑战。哥伦比亚塞萨尔河研究案例

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-01-01 DOI: 10.1016/j.ecohyd.2024.01.012

Stefany P. Vega , Ronald R. Gutierrez , Aymer Y. Maturana , Frank Escusa

Past research has mapped the limitations of water quality data in developing countries. This contribution reports a detailed assessment of the status of water quality data of the Cesar River, one of the main tributaries of the Magdalena River, which is regarded as the largest river system in Colombia. Our assessment indicates that the data is limited (in terms of length of record and resolution spatial) and exhibits significant information gaps, and that it is collected through a network of very sparse ground stations with deficient density. Subnational permissible limits for the five main water quality parameters (i.e., pH, TP, TN, DO, TSS) determine that water has reached worrisome levels of pollution. The data limitations does not allow for establishing the influence of natural (e.g., soil erosion) or anthropogenic processes such as wastewater discharges and in-channel sand mining into water quality. Since Colombia is a member of the Pacific Alliance and the Organisation for Economic Co-operation and Development (OECD) the associated supranational water quality regulatory frameworks are analyzed as they may guide the permissible limits and targets in the coming years. A freely accessible database of water quality observations between the years 2004–2020 of the Cesar River accompanies this contribution. We believe that it potentially constitutes a scientific input to plan for restoring the ecosystem services of the Cesar. We also believe this study depicts a representative case of the status of several rivers from the Latin American sphere and other developing countries.

以往的研究已经摸清了发展中国家水质数据的局限性。本文报告了对塞萨尔河水质数据状况的详细评估，塞萨尔河是马格达莱纳河的主要支流之一，被视为哥伦比亚最大的河流系统。我们的评估表明，这些数据（就记录长度和空间分辨率而言）是有限的，并且存在严重的信息缺口，而且这些数据是通过密度不足的非常稀疏的地面站网络收集的。五个主要水质参数（即 pH 值、TP 值、TN 值、溶解氧、总悬浮固体）的国家以下允许限值表明，水质污染已达到令人担忧的程度。由于数据有限，无法确定自然过程（如土壤侵蚀）或人为过程（如废水排放和河道内采砂）对水质的影响。由于哥伦比亚是太平洋联盟（Pacific Alliance）和经济合作与发展组织（OECD）的成员，我们对相关的超国家水质监管框架进行了分析，因为这些框架可能会指导未来几年的允许限值和目标。本报告附有一个可免费访问的数据库，其中包含 2004-2020 年间塞萨尔河的水质观测数据。我们认为，该数据库有可能为规划恢复塞萨尔河的生态系统服务提供科学依据。我们还认为，这项研究描绘了拉丁美洲和其他发展中国家几条河流现状的代表性案例。

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引用次数: 0

Bathymetric modelling for long-term monitoring of water dynamics of Ramsar-listed lakes using inundation frequency and photon-counting LiDAR data 利用淹没频率和光子计数激光雷达数据进行ramsar列表湖泊水动力学长期监测的水深模型

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-01-01 DOI: 10.1016/j.ecohyd.2023.10.003

Zhenyu Zhang, Xiaoye Liu

Accurate information on lake bathymetry and water dynamics is crucial for comprehending the intricate ecological processes in wetland ecosystems, which in turn can inform effective conservation and management strategies. However, obtaining such information can be challenging, particularly in remote areas with limited data. This study presents a way to leverage inundation frequency and ICESat-2 photon-counting LiDAR data to develop bathymetric models for Ramsar-listed lakes in a semi-arid region of Australia. Based on developed bathymetric models, monthly time series of water areas, levels and volumes were derived, providing a long-term view of the water dynamics of the two lakes from1987-2021. This is the first time that such detailed bathymetry and long-term water dynamics have been established for Ramsar-listed lakes in Australia's Outback. The findings of this study provide the most up-to-date information on the long-term trends of the Ramsar-listed lakes in the region and highlight the lakes’ prolonged dry spells when drought conditions prevailed through much of the 2000s and the 2010s as denoted by rainfall deficiencies and high evaporation. The outcome of this study serves as a valuable baseline for understanding the historical and ongoing status of these Ramsar-listed lakes in a warming and drying climate and contributes to the development of strategic plans to fulfill international obligations for wetland protection under the Ramsar Convention.

准确的湖泊水深和水动力学信息对于理解湿地生态系统中复杂的生态过程至关重要，从而为有效的保护和管理策略提供信息。然而，获取此类信息可能具有挑战性，特别是在数据有限的偏远地区。本研究提出了一种利用淹没频率和ICESat-2光子计数激光雷达数据来开发澳大利亚半干旱地区拉姆萨尔列表湖泊的水深模型的方法。基于已开发的水深模型，导出了水域面积、水位和体积的月度时间序列，提供了1987-2021年两个湖泊水动态的长期视图。这是第一次为澳大利亚内陆的拉姆萨尔名单湖泊建立如此详细的水深和长期水动力学。本研究的发现提供了该地区拉姆萨尔名单湖泊长期趋势的最新信息，并强调了湖泊在2000年代和2010年代的大部分时间里持续干旱的情况，表现为降雨不足和高蒸发。本研究的结果为了解这些列入拉姆萨尔湿地的湖泊在气候变暖和干燥的情况下的历史和现状提供了有价值的基线，并有助于制定战略计划，履行《拉姆萨尔公约》规定的国际湿地保护义务。

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引用次数: 0