Limnologica最新文献_第5页

Aquatic hyphomycetes show pollution-induced community tolerance in nitrogen enrichment experiment 富氮试验中，水生菌丝菌表现出污染诱导的群落耐受性

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-05-01 Epub Date: 2025-04-26 DOI: 10.1016/j.limno.2025.126254

Enzo V. Pereyra , Sebastián Kravetz , Julieta Lucero , Luciana Cibils-Martina

Freshwater ecosystems face significant threats worldwide, particularly from land use changes that impact biodiversity and ecosystem functions in rivers and streams. Essential elements such as carbon, nitrogen, and phosphorus play crucial roles in these ecosystems by directly influencing microbial activity and organic matter processing. This study examines the impact of increased nitrogen levels on the diversity and reproduction of aquatic hyphomycetes associated with decomposing leaf litter in the Chocancharava River, Córdoba, Argentina. Through a microcosm experiment, the objectives were to identify colonizing fungal species, analyze structural variables of the fungal community, and assess variations in sporulation rates and leaf litter decomposition rates of Salix sp. Contrary to expectations, no significant differences in fungal community structure were observed between the control and nutrient-enriched treatments. The increased nitrogen concentrations did not enhance fungal community growth, suggesting possible adaptation to chemical stressors consistent with the concept of pollution-induced community tolerance. These findings provide valuable insights into aquatic ecosystem resilience to nutrient enrichment, highlighting the importance of understanding microbial responses for effective ecosystem management.

淡水生态系统在世界范围内面临重大威胁，特别是来自影响生物多样性和河流和溪流生态系统功能的土地利用变化。碳、氮、磷等基本元素通过直接影响微生物活动和有机物加工，在这些生态系统中起着至关重要的作用。本研究探讨了阿根廷Córdoba Chocancharava河中氮含量增加对与分解凋落叶相关的水生菌丝菌多样性和繁殖的影响。通过微观环境试验，确定了柳树的定植真菌种类，分析了真菌群落的结构变量，并评估了柳树的产孢率和凋落叶分解率的变化。与预期相反，对照和富营养化处理之间的真菌群落结构没有显著差异。氮浓度的增加并没有促进真菌群落的生长，这表明真菌对化学胁迫的适应可能与污染诱导的群落耐受性的概念一致。这些发现为水生生态系统对养分富集的恢复力提供了有价值的见解，强调了了解微生物反应对有效生态系统管理的重要性。

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引用次数: 0

Nitrogen transformation and microbial community interactions in hydrodynamic heterogeneous hyporheic zone sediment: Insights for ecosystem sustainability 水动力异质下垫面沉积物中的氮转化和微生物群落相互作用：生态系统可持续性的启示

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-05-01 Epub Date: 2025-04-09 DOI: 10.1016/j.limno.2025.126252

Abdulhamid Yusuf , Duan Lei , Yaqiao Sun , Shuo Duan , Yunzeng Zhang

The hyporheic zone (HZ) plays a critical role in nitrogen transformation, yet the impact of hydrodynamic variability on microbial community dynamics within HZ sediments remains poorly understood. This study investigates how different hydrodynamic conditions affect microbial communities in HZ sediments using a simulation device to analyze groundwater-surface water interactions. Results indicate a significant reduction in nitrate (NO₃⁻) concentrations, with decreases of 93.81 % under upwelling (from 4.68 mg/L to 0.30 mg/L) and 91.05 % under downwelling conditions (from 6.2 mg/L to 0.55 mg/L). Concurrently, peaks in nitrite (NO₂⁻) concentrations were observed during denitrification processes (P < 0.05). High-throughput sequencing revealed diverse bacterial communities, predominantly consisting of Proteobacteria (40–46 % relative abundance) and Actinobacteria, with downwelling sediments exhibiting greater microbial richness (ACE index) compared to upwelling sediments (P < 0.05). The Shannon diversity indices showed mean values of 6.17 for downwelling and 5.81 for upwelling sediments. These findings demonstrate that hydrodynamic conditions significantly influence both microbial community structure and nitrogen transformation processes, underscoring the microbial role in biogeochemical processes of nitrogen cycling. Future research should examine the long-term effects of hydrological fluctuations on microbial dynamics in the HZ to enhance our understanding of ecosystem sustainability.

低渗带（HZ）在氮转化中起着关键作用，但水动力变异对低渗带沉积物中微生物群落动态的影响尚不清楚。本研究利用模拟装置分析地下水-地表水相互作用，探讨不同水动力条件对HZ沉积物中微生物群落的影响。结果表明硝酸盐（NO₃⁻）浓度显著下降，在上升流条件下下降了93.81 %（从4.68 mg/L到0.30 mg/L），在下升流条件下下降了91.05 %（从6.2 mg/L到0.55 mg/L）。同时，在反硝化过程中观察到亚硝酸盐（NO₂⁻）浓度的峰值（P <； 0.05）。高通量测序显示细菌群落多样，主要由变形菌门（40-46 %相对丰度）和放线菌门组成，与上升流沉积物相比，下坡沉积物的微生物丰富度（ACE指数）更高（P <； 0.05）。Shannon多样性指数的平均值为6.17，上升流为5.81。这些发现表明，水动力条件对微生物群落结构和氮转化过程都有显著影响，强调了微生物在氮循环的生物地球化学过程中的作用。未来的研究应该研究水文波动对HZ微生物动力学的长期影响，以增强我们对生态系统可持续性的理解。

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引用次数: 0

Corrigendum to “Reproductive ecology of three rheophilic fish species in the Austrian Danube River system: Insights into the spawning of Chondrostoma nasus, Barbus barbus, and Vimba vimba, and the larval development of C. nasus in the River Traisen” [Limnologica 112 (2025) 126250] 奥地利多瑙河水系中三种嗜流变鱼类的生殖生态学：对鼻软骨瘤、Barbus Barbus和Vimba Vimba在Traisen河中的产卵和C. nasus的幼虫发育的见解[limn112(2025) 126250]的更正

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-05-01 Epub Date: 2025-05-13 DOI: 10.1016/j.limno.2025.126257

Daniel Pelz , Thomas Friedrich , Bernhard Zeiringer , Thomas Hein , Günther Unfer

引用次数: 0

Adsorption performance and mechanism of HFO/pumice composites for phosphate in water HFO/浮石复合材料对水中磷酸盐的吸附性能及机理

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-03-01 Epub Date: 2025-02-21 DOI: 10.1016/j.limno.2025.126237

Jian Huang , Xianjin Qiu , Hua Zhang , Chenxi Zhang , Zhuoyi Lu , Tao Luo , Chunhua He , Jiamei Zhang , Zichen Shuai

Excessive phosphorus is a principal cause of water eutrophication. Adsorption is an effective method for phosphorus removal. Yet there is little research on the adsorption performance and mechanism of phosphorus with HFO (hydrous ferric oxide)/pumice composites. In this study, the HFO/pumice composites were prepared, and the adsorption performance and mechanism of HFO/pumice composites for phosphorus were researched. The results indicated that the phosphorus adsorption performance reached a maximum value of 5.69 mg·g⁻¹ when the pH was 7. The adsorption performance increased with temperature. Moreover, when Cl^-, SO₄^2- and HCO₃^- coexisted, HCO₃^- had a greater effect on the adsorption performance of the HFO/pumice composites for phosphorus, and the adsorption performance decreased gradually with the increase of HCO₃^- concentration. The adsorption isotherms indicated that the Langmuir isotherm model was more suitable to describe the adsorption behavior of the HFO/pumice composites for phosphorus, and the correlation coefficient was 0.9785. In addition, the pseudo-second-order kinetic was more consistent with the adsorption mechanism of HFO/pumice composites for phosphorus. The internal diffusion model showed that the combination of external mass transfer and internal diffusion controlled the adsorption rate of the HFO/pumice composites for phosphorus. The experimental results showed that the adsorption mechanisms of HFO/pumice composites for phosphorus mainly involved pore filling, electrostatic interaction, and surface complexation.

磷过量是水体富营养化的主要原因。吸附法是一种有效的除磷方法。但目前对氢氧化铁/浮石复合材料对磷的吸附性能及机理的研究较少。本研究制备了HFO/浮石复合材料，研究了HFO/浮石复合材料对磷的吸附性能及机理。结果表明，当pH = 7时，磷的吸附性能达到最大值5.69 mg·g−1。吸附性能随温度升高而升高。此外，当Cl-、SO42-和HCO3-同时存在时，HCO3-对HFO/浮石复合材料对磷的吸附性能影响较大，吸附性能随着HCO3-浓度的增加而逐渐降低。吸附等温线结果表明，Langmuir等温线模型更适合描述HFO/浮石复合材料对磷的吸附行为，相关系数为0.9785。此外，伪二级动力学更符合HFO/浮石复合材料对磷的吸附机理。内部扩散模型表明，外部传质和内部扩散共同控制了HFO/浮石复合材料对磷的吸附速率。实验结果表明，HFO/浮石复合材料对磷的吸附机制主要包括孔隙填充、静电相互作用和表面络合。

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引用次数: 0

Differences in community structuring among planktonic bacterial and micro-eukaryotic phyla in Chilean freshwater lakes 智利淡水湖浮游细菌和微真核生物门群落结构的差异

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-03-01 Epub Date: 2025-02-21 DOI: 10.1016/j.limno.2025.126233

Maxime Sweetlove , Bjorn Tytgat , Evelien Van de Vyver , Elie Verleyen , Sofie D‘hondt , Dagmar Obbels , Moritz Buck , Roberto Urrutia , Stefan Bertilsson , Wim Vyverman

The effect of spatial factors reflecting dispersal potential between sites versus local environmental conditions on freshwater planktonic communities remains poorly understood. We assessed differences in the relative importance of local and seasonal environmental conditions versus spatial factors in explaining differences in community composition (i.e., beta-diversity patterns) in microbial plankton of 39 mid-latitude Chilean lakes spanning representative ecological gradients in altitude, mixing depth and water chemistry. The assemblages were taxonomically profiled by paired-end high throughput sequencing of the V3-V4 region of the 16S and the V4 region of the 18S rRNA genes. Variation partitioning analyses revealed that the explanatory power of environmental and seasonal factors versus spatial variables and their mutual overlap varied considerably among taxa and functional groups. More than 12 % of the variation in community structure was uniquely explained by environmental factors in the phytoplankton groups Dinophyta, Ochrophyta and Cyanobacteria, as well as in oligotrophic ultramicrobacteria, such as small rhodopsin containing Actinobacteria and LD12 Alphaproteobacteria. In phago-heterotrophic and saprotrophic groups, including heterotrophic micro-eukaryotes, and Bacteroidetes, environmental factors explained a smaller or even insignificant portion of the differences in the community structure. Our findings suggest that in Chilean lake microplankton, complex traits related to ecological and trophic strategy appear to affect the relative effect of local environmental properties on their community composition and hence the strength of species sorting along limnological gradients.

反映地点间扩散潜力的空间因子与当地环境条件对淡水浮游生物群落的影响尚不清楚。我们评估了当地和季节性环境条件相对于空间因素在解释39个中纬度智利湖泊浮游微生物群落组成（即β多样性模式）差异方面的相对重要性，这些湖泊跨越了海拔、混合深度和水化学的代表性生态梯度。通过16S rRNA基因V3-V4区和18S rRNA基因V4区对端高通量测序对其进行了分类分析。变异分区分析表明，环境因子和季节因子对空间变量的解释力及其相互重叠在不同的分类群和功能类群之间存在较大差异。超过12% %的群落结构变化是由浮游植物群Dinophyta， Ochrophyta和Cyanobacteria以及寡营养超微生物（oligotrophic supermicrobacteria），如含小紫红质放线菌（Actinobacteria）和LD12 Alphaproteobacteria中的环境因素唯一解释的。在吞噬异养和腐养类群中，包括异养微真核生物和拟杆菌门，环境因素解释了群落结构差异的较小甚至不显著的部分。我们的研究结果表明，在智利湖泊中，与生态和营养策略相关的复杂性状似乎影响了当地环境特性对其群落组成的相对影响，从而影响了物种沿着湖泊梯度的分选强度。

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引用次数: 0

Adaptation of the biotic index for macroinvertebrates in tributaries of the Itacaiúnas River Itacaiúnas河支流大型无脊椎动物生物指数的适应性

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-03-01 Epub Date: 2025-02-21 DOI: 10.1016/j.limno.2025.126239

J.S. Oliveira , M.E.C. Liberal , C.P. Leão , M. Cruz , J. Martins , R.M. Siqueira , B.S. Godoy

The streams in the Amazon region play a pivotal role in maintaining biodiversity and providing ecosystem services, but they are vulnerable to a range of anthropogenic impacts. The objective of this study is to develop a biotic index based on macroinvertebrate communities for the purpose of assessing the ecological integrity of streams in the Tapirapé-Aquiri National Forest, an area that is threatened by mining and livestock activities. Sampling was conducted in 16 streams with varying degrees of impact over the course of two dry seasons in years of 2022 and 2023. Macroinvertebrates were collected from leaf litter habitats using a kick-net collector. Environmental conditions were evaluated through the adapted habitat integrity protocol and the calculation of integrated disturbance indices. The final index was composed of: genus richness, percentage of predators, and percentage of scrapers. No stream was classified as "preserved", with seven streams rated as "acceptable", eight as "impacted", and one as "severely impacted". The analysis indicated that activities such as mining and livestock farming are strongly associated with environmental degradation of high-altitude streams in the Amazon. Although the index showed moderate accuracy in cross-validation, it proved to be a promising tool for monitoring environmental quality in tropical regions. Future studies should consider integrating additional factors, such as habitat connectivity and hydrological dynamics, to enhance the index's sensitivity and support conservation policies.

亚马逊地区的河流在维持生物多样性和提供生态系统服务方面发挥着关键作用，但它们很容易受到一系列人为影响。这项研究的目的是建立一个基于大型无脊椎动物群落的生物指数，以评估受到采矿和畜牧活动威胁的tapirapapm - aquiri国家森林地区溪流的生态完整性。在2022年和2023年两个旱季期间，对16条受到不同程度影响的河流进行了采样。大型无脊椎动物是用踢网收集器从落叶生境中收集的。通过适应生境完整性方案和综合干扰指数的计算，对环境条件进行了评价。最终指数由属丰富度、掠食者百分比和掠食者百分比组成。没有河流被列为“保存”，有七条河流被评为“可接受”，八条河流被评为“受影响”，一条河流被评为“严重受影响”。分析表明，采矿和畜牧业等活动与亚马逊河高海拔河流的环境退化密切相关。虽然该指数在交叉验证中显示出中等的准确性，但它被证明是一个有前途的热带地区环境质量监测工具。未来的研究应考虑纳入生境连通性和水文动态等其他因素，以提高该指数的敏感性，为保护政策提供支持。

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引用次数: 0

An approach towards the quantification of the dynamics of a lacustrine bay based on blue economy investments 基于蓝色经济投资的湖湾动态量化方法研究

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-03-01 Epub Date: 2025-02-21 DOI: 10.1016/j.limno.2025.126235

Christopher Mulanda Aura , Collins Onyango Ongore , Safina Musa , Francis Kimani Njonge , Micheni Japhet Ntiba

The article presents a possible translational approach for the quantification of the changes that may occur in a lakescape following increased blue economy investments. The methodology used available literature, data and information from blue economy strategies implemented in a very active shoreline and rapidly growing Kisumu Bay of Lake Victoria, Kenya, as well as other publicly available online information. The study aimed to investigate the possible dynamics that may have socio-ecological effects on the environment. Six in-situ data collection locations were chosen based on the monthly sampling which occurred between 2018 and 2023. All parameters and investigation sites demonstrated stochastic temporal and geographical shifts. However, using this novel conceptual framework, the data revealed a mixed picture of the effects of blue economy investments on lacustrine health following the revamping of most shoreline activities. Based on nutrient and light transparency data, the lake water was found to be eutrophic to hypereutrophic, which was exacerbated by the start of these initiatives. The socio-ecological assessment showed that the bay had experienced continued variety of blue economy investments ranging in size and proximity to the lake. The parameters used showed varied patterns based on the proposed geographical scaling paradigm. Most of the identified blue economy investments had large variations in magnitude and their closeness to lacustrine ecosystems. This study provides a more practical, focused and localised technique of analysing the socio-ecological and limnological status of a potential hot spot for blue economy investment that is applicable to other lacustrine environments.

本文提出了一种可能的转化方法，用于量化在增加蓝色经济投资后可能发生的湖泊变化。该方法使用了在肯尼亚维多利亚湖的一个非常活跃的海岸线和快速增长的基苏木湾实施的蓝色经济战略以及其他公开的在线信息的现有文献、数据和信息。该研究旨在调查可能对环境产生社会生态影响的可能动态。根据2018年至2023年的每月抽样，选择了6个原位数据收集点。所有的参数和调查地点都表现出随机的时间和地理变化。然而，使用这一新颖的概念框架，数据揭示了在大多数海岸线活动进行改造后，蓝色经济投资对湖泊健康的影响好坏参半。根据营养物和光透明度数据，该湖泊水体呈富营养化至超富营养化，这些措施的实施加剧了这一状况。社会生态评价表明，海湾经历了各种规模和邻近湖泊的蓝色经济投资。基于所提出的地理标度范式，所使用的参数呈现出不同的格局。大多数已确定的蓝色经济投资在规模和与湖泊生态系统的接近程度上存在很大差异。这项研究为分析蓝色经济投资潜在热点的社会生态和湖泊状况提供了一种更实用、更集中、更本地化的技术，适用于其他湖泊环境。

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引用次数: 0

Environmental preservation leads to greater beta diversity of periphytic algae in Amazonian streams 环境保护导致亚马逊河流中周围植物藻类的β多样性增加

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-01-01 Epub Date: 2024-12-11 DOI: 10.1016/j.limno.2024.126221

Ellen Guimarães Amaral Trindade , Bárbara Dunck

Changes in land use modify the structure of forests and the dynamics of streams. They cause changes in the chemical and physical environments, directly affecting the composition of the local aquatic biota. Our research sought to answer whether species composition is different between streams with different land uses; whether density is higher in locations with lower environmental integrity values; whether the richness and diversity of periphytic species are related to higher values of environmental integrity indices; and whether beta diversity is greater in streams in preserved areas. 18 streams were sampled in the Tapajós River basin, in a range of at least 100 km in the stretch that comprises the banks of the Amazon National Park and its surroundings, located in the southwest region of the State of Pará. Samples of periphytic algae were obtained from the Nymphaea amazonum Mart. & Zucc macrophyte. Our study demonstrated that streams located in preserved areas (national forest) differed environmentally from streams with agricultural land use and presented higher environmental integrity values. Species composition differed between different land uses. Environmental integrity had no effect on species diversity, richness and density. Beta diversity responded to different land uses, and the highest values were observed in streams from more intact environments. Our results showed that environmental variables had a greater influence on the structuring of the periphytic community than landscape variables. Preserved areas were important in environmental heterogeneity and in the formation of the structure of periphytic communities. Our study demonstrated that streams located in preserved areas differ from surrounding streams with different land uses, mainly because they present greater environmental integrity and greater variation in the beta diversity of periphytic algae.

土地利用的变化改变了森林的结构和河流的动态。它们引起化学和物理环境的变化，直接影响当地水生生物群的组成。我们的研究试图回答物种组成是否在不同土地利用的溪流之间有所不同；环境完整性值较低的地点是否密度较高；周边植物物种的丰富度和多样性是否与较高的环境完整性指数有关；以及在保护区的溪流中beta多样性是否更大。在位于帕尔州西南地区的亚马逊国家公园及其周边地区，在Tapajós河流域至少100 公里的范围内对18条溪流进行了采样。从亚马逊若虫市场获得了周围生长藻类的样本。,调查和大型植物。研究表明，位于保护区（国家森林）的河流与农业用地的河流在环境上存在差异，具有更高的环境完整性值。不同土地利用方式的物种组成存在差异。环境完整性对物种多样性、丰富度和密度没有影响。β多样性对不同的土地利用方式有响应，在更完整的环境中观察到最高的值。结果表明，环境变量对周边植物群落结构的影响大于景观变量。保护区在环境异质性和周边植物群落结构的形成中起着重要作用。我们的研究表明，位于保护区的河流与周围不同土地利用的河流不同，主要是因为它们具有更大的环境完整性和更大的周围藻类多样性变化。

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引用次数: 0

Discovery of the Asian clam Corbicula sp. form A in Ensenada, Baja California through conventional taxonomy and innovative shell dna whole genome amplification 利用传统分类学和创新的壳dna全基因组扩增技术在下加利福尼亚州恩塞纳达发现亚洲蛤Corbicula sp. form A

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-01-01 Epub Date: 2024-12-22 DOI: 10.1016/j.limno.2024.126222

Jorge Cáceres-Martínez , Roberto Cruz-Flores , Edna Naranjo-García , Miguel Ángel Del Río-Portilla , Rebeca Vásquez-Yeomans

Ensenada, Baja California is characterized by intermittent runoff occurrences, typically limited to the rainy season, and scarce hot springs, devoid of documented native freshwater clam populations. Notably, the region encompasses the 'Emilio López Zamora' reservoir, vital for water storage and urban supply. However, an unexpected phenomenon unfolded during the dry season of 2021: a substantial accumulation of deceased freshwater clam shells was serendipitously discovered along a stretch of sandy reservoir bed. The goals of this study were to determine the identity of the clam, analyze its possible origin and consider its potential control/use. A sampling of 100 these shells was carried out to perform morphological and molecular identification. Morphological identification was carried out using conventional malacological techniques of taxonomy based on shell morphology. Molecular identification was conducted by extracting DNA from both the shell and periostracum of deceased clams, employing whole-genome amplification (WGA) in conjunction with PCR and sequencing techniques. The integration of classic malacological methods with molecular analysis unequivocally confirmed the lineage of the clam as Corbicula sp. form A. This is the first record of this invasive species in the city of Ensenada, Baja California. The WGA method demonstrated its efficacy in identifying deceased mollusks when only the shell remains, and nucleic acid availability is constrained. The origin of the clam within the reservoir remains elusive, underscoring the need for future investigations to delve into its potential for biomonitoring, bioremediation, and aquaculture applications.

Ensenada，下加利福尼亚州的特点是间歇性的径流发生，通常仅限于雨季，并且缺乏温泉，缺乏有记录的本地淡水蛤蜊种群。值得注意的是，该地区包括“Emilio López Zamora”水库，对储水和城市供水至关重要。然而，在2021年的旱季，一个意想不到的现象出现了：沿着一段沙质水库床，偶然发现了大量死亡的淡水蛤壳。本研究的目的是确定蛤的身份，分析其可能的来源，并考虑其潜在的控制/利用。对100个壳进行了形态学和分子鉴定。形态学鉴定采用传统的贝壳形态学分类技术。采用全基因组扩增（WGA）技术，结合PCR和测序技术，从死亡蛤壳和骨膜中提取DNA进行分子鉴定。经典的线虫学方法与分子分析相结合，明确地证实了这种蛤的血统是Corbicula sp. form a。这是这种入侵物种在下加利福尼亚州恩塞纳达市的第一次记录。WGA方法在仅保留壳的情况下识别死亡软体动物是有效的，并且核酸的可用性受到限制。水库中蛤蜊的起源仍然难以捉摸，强调需要进一步调查，以深入研究其在生物监测，生物修复和水产养殖应用方面的潜力。

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引用次数: 0

Suitability of wild decapods from an alluvial valley in South America for human nutrition as derived by amino acid composition 南美冲积河谷野生十足类动物的氨基酸组成对人类营养的适用性

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-01-01 Epub Date: 2025-01-17 DOI: 10.1016/j.limno.2025.126223

Magali Petean , Pablo Collins , Maria Eugenia D’Alessandro

Decapods are abundant in freshwater environments of tropical and subtropical rivers and could be considered a good resource for human feeding. The present study evaluated the nutritional quality of decapods in relation to amino acid (AA) composition and compared them with human requirements, and with the AA patterns of some crustaceans and fishes commonly consumed by human people around the world. Prawn and crab (Macrobrachium borellii and Aegla uruguayana, respectively) from the Parana River Basin were sampled. Catch effort and volume were also calculated according to the sampled area. AA was determined by high-performance liquid chromatography. Sixteen AA were identified in muscle; eight were essential amino acids for humans (EAA), and the others were non-essential amino acids (NEAA). Of the total AA, 38.0 % of those from M. borellii and 39.8 % from A. uruguayana were EAA. The NEAA values were 62.0 % for M. borellii and 60.2 % for A. uruguayana. Lipid content was close to 1 % of the biomass in wet weight in both species. When comparing decapod AA profiles with those from marine and freshwater crustacean and fishes used as food (giant river prawn, amazon river prawn, longarm river prawn, southern king crab, green tiger shrimp, speckled shrimp, tuna, sardine, hake, carp, trout, jundía catfish), the values of Leucine and Lysine in the decapods were found to be higher or equal. The amount of tyrosine in M. borellii and A. uruguayana was higher than in freshwater fishes. Nutritionally, both species are good quality food and could serve as a functional resource for the feeding of humans, nevertheless, they are not yet marketed.

十足类动物在热带和亚热带河流的淡水环境中分布丰富，是一种可供人类食用的良好资源。本研究从氨基酸组成方面评价了十足类动物的营养品质，并将其与人类需要量进行了比较，并与世界上一些人类常食用的甲壳类动物和鱼类的氨基酸模式进行了比较。选取了巴拉那河流域的对虾和蟹（分别为borellimacrobrachium borellii和乌拉圭大虾）。并根据采样面积计算捕获力度和体积。AA采用高效液相色谱法测定。在肌肉中鉴定出16个AA；8种为人体必需氨基酸（EAA），其余为非必需氨基酸（NEAA）。其中，博雷氏田鼠和乌拉圭田鼠分别为38.0 %和39.8 %。NEAA值分别为62.0 %和60.2 %。脂质含量接近1 %的生物量湿重。将十足类动物与海洋和淡水甲壳类动物及食用鱼类（河对虾、亚马逊河对虾、长臂河对虾、南帝王蟹、绿虎虾、斑点虾、金枪鱼、沙丁鱼、鳕鱼、鲤鱼、鳟鱼、jundía鲶鱼）的AA谱进行比较，发现十足类动物的亮氨酸和赖氨酸值较高或相等。白颡鱼和乌拉圭颡鱼的酪氨酸含量高于淡水鱼。从营养上讲，这两个品种都是优质食品，可以作为人类食用的功能性资源，然而，它们尚未上市。

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