Limnologica最新文献_第4页

Cryptic invasion and intraspecific hybridisation in the freshwater snail Theodoxus fluviatilis in the river Rhine 莱茵河淡水蜗牛的隐居入侵和种内杂交

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-05-01 Epub Date: 2025-03-22 DOI: 10.1016/j.limno.2025.126247

Hans-Peter Rusterholz, Bruno Baur

Intraspecific cryptic invasion involves the spread and establishment of non-native genetic lineages within the species’ native range. Individuals of non-native lineages can displace native individuals or hybridise with them. Hybridisation homogenises unique characteristics of geographically distinct populations and thus reduces the potential for future species diversity. In Europe, the freshwater snail Theodoxus fluviatilis has different haplotypes depending on the geographically separated water system. Since 2005, an upstream spread of T. fluviatilis with haplotype F31, which originates in the Ponto-Caspian region, has been recorded in the Danube and later in the river Rhine in Germany. Shortly after the invasion of snails with non-native haplotype, we collected 301 individuals of T. fluviatilis from 11 locations in the Upper and High Rhine. We used a mitochondrial marker (COI) for the determination of the snails’ haplotype: 19 individuals belonged to the native haplotype F28 (6.3 %), 159 (52.8 %) to the non-native haplotype F31 and 123 (40.9 %) to another non-native haplotype “euxinus” (also of Ponto-Caspian origin). Using eight microsatellites we examined whether individuals of the invading non-native haplotypes hybridise with individuals of the native haplotype F28. We found 12 hybrids (4.0 %) among the 301 snails examined. Hybrids occurred in 7 out of the 11 populations examined. We provide evidence that hybrids with the native haplotypes occur as early as the first 1–2 generations after the invasion of the non-native haplotypes. This indicates that the native haplotype of T. fluviatilis is unlikely to persist in the High Rhine in the long term.

种内隐入侵包括在物种的本地范围内传播和建立非本地遗传谱系。非本地血统的个体可以取代本地个体或与他们杂交。杂交使地理上不同种群的独特特征同质化，从而降低了未来物种多样性的潜力。在欧洲，淡水蜗牛Theodoxus fluviatilis有不同的单倍型，这取决于地理上分离的水系。自2005年以来，在多瑙河和后来在德国的莱茵河中记录到一种单倍型F31的河流绦虫的上游传播，它起源于蓬托-里海地区。在外来单倍型钉螺入侵后不久，我们在上莱茵河和上莱茵河的11个地点采集了301只钉螺。我们使用线粒体标记（COI）测定了这些蜗牛的单倍型：19个个体属于本地单倍型F28(6.3 %)，159个个体属于非本地单倍型F31(52.8 %)，123个个体属于另一种非本地单倍型“euxinus”（也属于蓬-海起源）（40.9 %）。利用8颗微卫星，我们检测了入侵的非本地单倍型个体是否与本地单倍型F28个体杂交。在301只钉螺中发现12只杂交种（4.0 %）。在调查的11个种群中，有7个发生杂交。我们提供的证据表明，与本地单倍型的杂交早在非本地单倍型入侵后的前1-2代就发生了。这表明，本地的单倍型的T. fluviatilis不太可能在高莱茵河长期存在。

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引用次数: 0

Multi-year movements of potamodromous cyprinid species within a highly anthropized river assessed using RFID-equipped fishways 在一条高度人类化的河流中，使用配备rfid的鱼道评估马铃薯鲤种的多年运动

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-05-01 Epub Date: 2025-02-28 DOI: 10.1016/j.limno.2025.126236

Stéphane Tétard , Anthony Maire , Michaël Ovidio , Jean-Philippe Benitez , Frédéric Schaeffer , Marie Coll , Romain Roy

Movements of potamodromous fish are poorly understood, especially in large rivers, because studies often focus on fishway evaluation and diadromous species. Here, we assessed the movements of 808 fish of five potamodromous species (Barbel, Barbus barbus; Common bream, Abramis brama; Nase, Chondrostoma nasus; Asp, Leuciscus aspius and chub Squalius cephalus) over 14 years in a highly anthropized river system, the Rhine River, where hydropower plants were progressively equipped with fishways including RFID antennas. The objectives of the study were 1) to characterize long-term and large-scale individual movement patterns of five potamodromous fish species 2) to assess inter- and intra-specific variations based on quantitative movement metrics and 3) to create a typology of individuals based on their movements. Results showed that, despite high intra-specific variability, the inter-specific differences were strong enough to highlight long-term and large-scale species-specific behaviors. Breams exhibited movements that occurred essentially during spawning migration period and at the reach scale. In contrast, barbels were more active, with more movements outside their spawning migration period, showed more large-scale and downstream movements, and used navigation locks more often than other species. For this species, the maximum distance between the two furthest recorded positions at the basin scale was exceptionally high (max = 155 km). We conclude that potamodromous species undoubtedly perform large-scale movements, which are characterized by both species-specific and common features. Therefore, efforts need to be made to better consider their ecological needs and swimming capabilities when planning and designing effective fishways for the diverse range of species that move within river systems.

由于研究往往集中在鱼道评价和双足鱼类上，人们对双足鱼类的活动知之甚少，特别是在大河中。在此，我们评估了5种薯类(Barbel, Barbus Barbus；普通鲷鱼；鼻，鼻软骨瘤；在高度人类化的河流系统——莱茵河中，水力发电厂逐渐配备了包括RFID天线在内的鱼道。本研究的目的是：1)描述5种鱼的长期和大规模个体运动模式；2)基于定量运动指标评估种间和种内变化；3)基于个体运动建立个体类型学。结果表明，尽管种内变异性较高，但种间差异足以突出长期和大规模的物种特异性行为。鲷鱼的运动主要发生在产卵洄游期间和河段尺度上。相比之下，刺鱼更为活跃，在产卵洄游期之外的活动更多，表现出更多的大规模和下游运动，并且使用导航锁的频率高于其他物种。该物种在流域尺度上记录的两个最远位置之间的最大距离异常高（max = 155 km）。我们的结论是，马铃薯种无疑会进行大规模的运动，这种运动具有物种特异性和共同特征。因此，在规划和设计有效的鱼道时，需要努力更好地考虑它们的生态需求和游泳能力，以满足在河流系统内移动的各种物种。

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引用次数: 0

Macroalgal (Spirogyra) nutrient and chlorophyll stoichiometric response to nutrient concentrations in a tropical river 热带河流中大藻营养物和叶绿素对营养物浓度的化学计量学响应

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-05-01 Epub Date: 2025-04-21 DOI: 10.1016/j.limno.2025.126253

Simon Townsend

A tenet of ecological stoichiometric theory is that autotroph stoichiometry is normally responsive to the variable supply of environmental resources of nutrients and light. The extent of autotroph stoichiometric plasticity is likely to vary with environmental resource variability, autotroph species, growth form and physiological needs. A field study was conducted in the Daly River catchment in the Australian wet/dry tropics to test the hypothesis that the carbon (C), nitrogen (N), phosphorus (P) and chlorophyll a (Chla) stoichiometry of the riverine, filamentous macroalga Spirogyra fluviatilis is responsive to concentrations of dissolved inorganic nitrogen (DIN), dissolved phosphorus and light, as well as temperature which can influence autotroph stoichiometry indirectly. Linear regressions were undertaken between stoichiometric dependent variables and independent environmental variables. With increased DIN concentrations, S. fluviatilis percentage content of N, C and Chla and molar N:P ratios increased, whilst C:Chla ratios decreased. No effect of light or temperature on algal stoichiometry was detected. The regressions, however, only explained one-third or less of S. fluviatilis stoichiometric variability, due most probably to methodological constraints, cell nutrient storage and uptake dynamics, and possibly undetected light and temperature effects. S. fluviatilis demonstrated N plasticity in response to DIN concentrations, to enrich the alga with N under relatively high DIN concentrations, enhancing its nutritional quality for herbivores and omnivores. This study complements others which have demonstrated macroalgal P plasticity. Stoichiometric variables can be used to monitor the impact of nutrient pollution and identify the stoichiometric basis for ecosystem-wide implications of nutrient pollution.

生态化学计量理论的一个原则是，自养化学计量通常对环境中养分和光照资源的可变供应作出反应。自养生物的化学计量可塑性程度可能随环境资源的变化、自养生物种类、生长形式和生理需求而变化。在澳大利亚干湿热带地区的戴利河流域进行了一项实地研究，以验证河流丝状大藻（Spirogyra fluviatilis）的碳(C)、氮(N)、磷(P)和叶绿素A （Chla）的化学计量假设，这些假设对溶解无机氮（DIN）、溶解磷、光和温度的浓度有响应，这些浓度可以间接影响自养生物的化学计量。在化学计量学因变量和独立环境变量之间进行了线性回归。随着DIN浓度的增加，河螺中N、C、Chla的百分含量和摩尔N:P比值升高，C:Chla比值降低。没有发现光和温度对藻类化学计量的影响。然而，回归只解释了三分之一或更少的河螺化学计量变异性，这很可能是由于方法上的限制，细胞营养储存和摄取动力学，以及可能未检测到的光和温度的影响。S. fluviatilis对DIN浓度的响应表现出氮的可塑性，在较高的DIN浓度下为藻类富集氮，提高其对草食动物和杂食动物的营养品质。这项研究补充了其他已经证明大藻P可塑性的研究。化学计量变量可用于监测营养物污染的影响，并确定营养物污染对整个生态系统的影响的化学计量基础。

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引用次数: 0

Seasonal variation of zooplankton community structure between two subtropical reservoirs of contrasting hydraulic retention time 两个水力滞留时间对比的亚热带水库浮游动物群落结构的季节变化

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-05-01 Epub Date: 2025-04-18 DOI: 10.1016/j.limno.2025.126249

Julieta Cuevas, Guillermo Chalar, Sol De Giacomi, Mauricio González-Piana, Carmela Carballo

Reservoirs significantly influence aquatic ecosystems by modifying river flows and forming artificial lakes. This study examines the zooplankton communities in two Uruguayan connected reservoirs, Bonete and Baygorria, focusing on the impact of different water residence times. Upstream Bonete has a long retention time of 140 days, whereas Baygorria has a short retention time of 3 days. The investigation was conducted over 2019–2020, involving ten sampling events at three depths. Physical and chemical variables, including temperature, dissolved oxygen, pH, turbidity, chl-a, total nitrogen, total phosphorus, and organic matter concentrations were measured. Zooplankton biomass and community structure were analyzed through Redundancy Analysis (RDA). Results indicated higher zooplankton biomass in Bonete, with significant seasonal and vertical variations linked to environmental factors. Temperature, chl-a concentration, and water residence time were identified as key determinants. The study highlights the role of water residence time in shaping zooplankton communities. The findings underscore the need for tailored management strategies to address the ecological dynamics of reservoirs.

水库通过改变河流流量和形成人工湖对水生生态系统产生显著影响。本研究考察了乌拉圭两个相连水库（Bonete和Baygorria）中的浮游动物群落，重点研究了不同水停留时间的影响。上游的Bonete保留期较长，达140天，Baygorria保留期较短，只有3天。该调查在2019-2020年期间进行，涉及三个深度的10次采样事件。测量了物理和化学变量，包括温度、溶解氧、pH、浊度、chl-a、总氮、总磷和有机质浓度。通过冗余分析（RDA）对浮游动物生物量和群落结构进行了分析。结果表明，博尼特海域浮游动物生物量较高，且具有明显的季节和垂直变化，与环境因素有关。温度、chl-a浓度和水停留时间被确定为关键决定因素。该研究强调了水中停留时间在形成浮游动物群落中的作用。研究结果强调，需要有针对性的管理策略来解决水库的生态动态问题。

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引用次数: 0

Stable isotope analysis reveals inter- and intraspecific trophic relationships of the endangered Central American river turtle in southern Mexico 稳定同位素分析揭示了墨西哥南部濒临灭绝的中美洲河龟的种间和种内营养关系

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-05-01 Epub Date: 2025-02-26 DOI: 10.1016/j.limno.2025.126238

Eduardo Reyes-Grajales , Matteo Cazzanelli , Nora P. López-León , Alejandra Sepúlveda-Lozada , Luis Antonio Muñoz Alonso , Miriam Soria-Barreto , Rocío Rodiles-Hernández

Trophic ecology studies enhance our understanding of species relationships within communities and ecosystems, providing critical information for conservation programs targeting endangered species. The Central American river turtle (Dermatemys mawii) is one of the most critically endangered testudine species worldwide, yet its trophic ecology has been scarcely studied. Based on stable isotope analysis (δ¹³C and δ¹⁵N), we applied community-wide metrics and stable isotope mixing models to assess the intraspecific variation in the isotopic niche of D. mawii among different age and sex categories, its interspecific relationships with dominant fish species, and the relative contribution of basal resources to selected aquatic consumers in an oxbow lake in southern Mexico. The community-wide metrics suggested that D. mawii juveniles consumed a greater variety of food resources and/or had access to a wider variety of habitats than adults, regardless of sex. Through the mixing models we detected that the aquatic plant Pistia stratiotes was the main dietary source for adult females, while riparian plants were more important for juveniles and adult males, suggesting intraspecific niche partitioning. We also identified distinct energy pathways for D. mawii and fish, with turtles relying on vascular plants (both riparian and aquatic) while fish primarily depended on seston. Our findings suggest that D. mawii may play an important role in nutrient cycling and potentially regulate the presence of the free-floating macrophyte P. stratiotes at the study site.

营养生态学研究增强了我们对群落和生态系统中物种关系的理解，为濒危物种保护计划提供了重要信息。中美洲河龟（Dermatemys mawii）是世界上最濒危的龟类物种之一，但对其营养生态学的研究很少。基于稳定同位素分析（δ13C和δ15N），我们应用群落尺度和稳定同位素混合模型，评估了墨西哥南部牛轭湖马氏螯虾同位素生态位在不同年龄和性别类别间的变化、与优势鱼类的种间关系以及基础资源对特定水生消费者的相对贡献。社区范围内的指标表明，与成虫相比，无论性别，马威d.m iwii幼虫消耗了更多种类的食物资源和/或获得了更多种类的栖息地。通过混合模型，我们发现水生植物是雌成虫的主要食物来源，而滨水植物对幼鱼和雄成虫更为重要，提示种内生态位分配。我们还发现了龟和鱼的不同能量途径，龟依赖于维管植物（包括河岸和水生植物），而鱼主要依赖于松本植物。我们的研究结果表明，马氏线虫可能在营养循环中发挥重要作用，并可能调节研究地点自由漂浮的大植物P. stratiotes的存在。

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引用次数: 0

Hydrochemistry, microbial ecology and physiological-biochemical properties of isolated bacteria of Tyrma hot spring (Far East of Russia) 俄罗斯远东Tyrma温泉分离菌的水化学、微生物生态学及生理生化特性

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-05-01 Epub Date: 2025-04-30 DOI: 10.1016/j.limno.2025.126255

E.G. Lebedeva , I.V. Bragin , A.A. Pavlov , D.A. Rusakova

In this study, we investigated for the first time the geochemistry, abundance, diversity and some physiological and biochemical properties of cultured bacterial communities inhabiting the Tyrminskie thermal springs (Far East, Russia). The thermal waters from the Tyrma Spring are characterized by a low mineralization level (less than 0.25 g/L), an alkaline pH medium (pH=9.4) and a fluoride (up to 10 mg/L) and bicarbonate sodium-based composition. In these thermal waters and associated microbial mats, low numbers of physiological groups of microorganisms were noted, with a predominance of heterotrophically active nitrifying bacteria in the water and silicate- and sulfate-reducing bacteria in the mats. The average air temperature during the winter was −7°C. The temperature of the spring water during sampling was recorded between 31.8 and 36.8°C. These temperatures favor the presence of mesophilic and thermotolerant microorganisms in the thermal waters, which is consistent with the identified bacterial genera. Bacterial strains isolated from the thermal waters were identified using the 16S rRNA gene. The isolated bacterial strains belong to the phyla Firmicutes, Proteobacteria and Actinobacteria. Bacterial strains of thermal waters were represented by the genera Bacillus, Ochrobactrum, Brevibacterium, Achromobacter. Shannon and Simpson ecological indices showed low bacterial diversity and their uniform distribution in the community. It should be noted that this assay is based solely on cultured microorganisms using standard culture media. According to canonical correspondence analysis the greatest influence on bacterial diversity was exerted by the elements: calcium, sodium, fluorine, and hydrocarbonates. The isolated bacteria were able to metabolize a wide range of carbohydrates and alcohols, although they fermented lactose poorly. Cultures of the Bacillus genus show the greatest sugar-metabolizing activity. The isolates are capable of producing extracellular enzymes, indicating their potential industrial applications.

本文首次对俄罗斯远东地区Tyrminskie温泉中培养细菌群落的地球化学特征、丰度、多样性及一些生理生化特性进行了研究。Tyrma温泉热水的特点是矿化水平低（小于0.25 g/L）， pH值为碱性（pH=9.4），氟化物（高达10 mg/L）和碳酸氢盐钠基成分。在这些热水和相关的微生物垫中，注意到生理微生物群数量较少，水中的异养活性硝化细菌和垫中的硅酸盐和硫酸盐还原细菌占主导地位。冬季平均气温为- 7°C。采样时的泉水温度在31.8 ~ 36.8℃之间。这些温度有利于热水体中嗜温和耐热微生物的存在，这与已鉴定的细菌属一致。利用16S rRNA基因对从温泉水中分离的菌株进行鉴定。分离到的菌株分别属于厚壁菌门、变形菌门和放线菌门。温泉水细菌菌株主要有芽孢杆菌属、赭杆菌属、短杆菌属、无色杆菌属。Shannon和Simpson生态指数显示群落细菌多样性较低且分布均匀。应该注意的是，该试验仅基于使用标准培养基培养的微生物。根据标准对应分析，对细菌多样性影响最大的是元素：钙、钠、氟和碳酸盐。分离出来的细菌能够代谢大量的碳水化合物和酒精，尽管它们发酵乳糖的能力很差。芽孢杆菌属的培养物表现出最大的糖代谢活性。分离物能够产生胞外酶，表明其潜在的工业应用前景。

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引用次数: 0

Short-term and seasonal dynamics of planktonic protist community (Alveolata, Ciliophora) in a neotropical urban lake, Maringá - Paraná, Brazil 巴西maring<s:1> - paran<e:1>新热带城市湖泊浮游原生生物群落（Alveolata, Ciliophora）的短期和季节动态

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-05-01 Epub Date: 2025-04-17 DOI: 10.1016/j.limno.2025.126251

Matheus Henrique de Oliveira de Matos , Loiani Oliveira Santana , Felipe Rafael de Oliveira , Melissa Progênio , Edilaine Corrêa Leite , João Vitor Bredariol , Luiz Felipe Machado Velho

The aim of this study was to investigate the temporal dynamics of planktonic ciliate communities, based on daily fluctuations between different hydrological periods in a eutrophic urban lake located in the city of Maringá, Paraná, Brazil. We hypothesized that abundance would vary more between collection days than between hydrological periods, whereas richness and selection would vary more between hydrological periods than collection days. Ciliated protists were sampled during two distinct hydrological periods: a dry period in September 2018 and a rainy period in January 2019. Sampling was conducted 10 times during each period, with collections every 3 days over 30 days. Throughout the study, 84 morphospecies were recorded. The Prostomatida group dominated in both periods, contributing to 37.1 % of the total abundance in the dry season and 74 % in the rainy season. Other representative groups included Peritrichia (35.7 % in the dry season) and less abundant taxa such as Nassulida, Colpodea, and Cyrtophorida (8.5 % in the rainy season). Abundance varied significantly in the short term (i.e. between sampling days) and between hydrological periods (dry and rainy), with higher values during the rainy season (mean ± SE: 1250 ± 150 Ind.L⁻¹) compared to the dry season (mean ± SE: 850 ± 120 Ind.L⁻¹). Differences in richness were not significant between the hydrological periods. However, there was significant daily variation during the rainy season. Species composition differed only between hydrological periods, as predicted. This study shows that the hydrological regime significantly influences ciliate communities, with variations in richness, abundance, and composition occurring over short periods. Therefore, it is recommended that these organisms be analyzed continuously, across short intervals, and seasonally. This approach is necessary because their responses to environmental monitoring may vary depending on the sampling period, given their high sensitivity to environmental changes.

本研究的目的是基于位于巴西帕拉paraning市的一个富营养化城市湖泊不同水文期之间的日波动，研究浮游纤毛虫群落的时间动态。我们假设丰度在不同的采集日之间比在不同的水文时期之间变化更大，而丰富度和选择在不同的水文时期之间比在不同的采集日之间变化更大。在两个不同的水文时期对纤毛原生生物进行了采样：2018年9月的干旱期和2019年1月的雨季。每期抽样10次，30天内每3天采集一次。在整个研究过程中，记录了84种形态种。Prostomatida类群在两个时期均占主导地位，在旱季占总丰度的37.1% %，在雨季占74 %。其他代表性类群包括Peritrichia（旱季为35.7 %）和较少的分类群如Nassulida、Colpodea和Cyrtophorida（雨季为8.5 %）。丰度在短期内（即采样日之间）和不同水文时期（旱季和雨季）变化很大，雨季的丰度（平均± SE: 1250 ± 150 Ind.L⁻¹）比旱季的高（平均± SE: 850 ± 120 Ind.L⁻¹）。不同水文期间丰富度差异不显著。然而，在雨季有显著的日变化。正如预测的那样，物种组成只在不同的水文时期有所不同。该研究表明，水文制度显著影响纤毛虫群落，其丰富度、丰度和组成在短时间内发生变化。因此，建议对这些生物进行连续的、短时间间隔的季节性分析。这种方法是必要的，因为它们对环境监测的反应可能因采样周期而异，因为它们对环境变化高度敏感。

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引用次数: 0

It’s getting tight – How colmation influences the sediment fauna and why we might fail in restoring our streams 越来越紧迫了——沉积是如何影响沉积物动物的，以及为什么我们可能无法恢复我们的河流

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-05-01 Epub Date: 2025-03-20 DOI: 10.1016/j.limno.2025.126246

Teresa Luftensteiner , Alcides Aybar Galdos , Markus Noack , Holger Schindler , Heide Stein , Hans Jürgen Hahn

Restoration of streams to a good ecological status, as required by the European Water Framework Directive (WFD), has been slow, if not failing. Colmation, the clogging of hyporheic interstices by fine sediments, could be one cause for this failure by negatively influencing hyporheic invertebrates. Therefore, this study analysed the hyporheic communities in six German rivers representing all five ecological status classes using ecological, colmation- and grain size analysis. The study revealed that I) the amount of fine sediment and level of colmation had a significant impact on the taxa number and the abundance of hyporheic meiofauna, II) increased colmation led to a shift from coarse- to fine sediment dweller-dominated hyporheic communities, III) hyporheic communities were impacted most by land use in catchments, fine sediment levels, and colmation, and IV) faunal patterns associated with colmation corresponded to the ‘general degradation’ classification defined by the WFD. Presumably elevated fine sediment loads from open land use types, and thereby increasing colmation-levels, altered the porosity and the size of voids. This led to a loss of habitats within the sediments which influenced hyporheic invertebrates. While substrate conditions are important for benthic communities, they are especially critical for hyporheic fauna, which responds particularly strongly to changes in sediment structure. Oxygen and nutrient provision are influenced by sediment structure and further impact the hyporheic organisms. Consequently, the loss of functioning communities led to the deterioration of the ecological status of rivers. Colmation should therefore be considered when implementing the WFD.

按照欧洲水框架指令（WFD）的要求，将河流恢复到良好的生态状态，即使不是失败，也是缓慢的。淤泥淤积，即细小沉积物堵塞水下间隙，可能是造成这种失败的一个原因，因为它对水下无脊椎动物产生了负面影响。因此，本研究利用生态、沉降和粒度分析分析了德国6条河流中代表所有5个生态状态等级的潜流群落。研究表明：1)细泥沙量和沉降水平对潜流小生动物的类群数量和丰度有显著影响；2)沉降的增加导致潜流群落由粗泥沙为主向细泥沙为主转变；3)潜流群落受流域土地利用、细泥沙水平和沉降的影响最大。IV)与退化相关的动物模式符合世界自然保护区定义的“一般退化”分类。据推测，这增加了开放土地使用类型的细沉积物负荷，从而增加了排列水平，改变了孔隙度和空隙的大小。这导致沉积物中栖息地的丧失，从而影响了深海无脊椎动物。虽然底栖生物群落的底物条件很重要，但它们对水下动物尤其重要，因为它们对沉积物结构的变化反应特别强烈。氧气和养分供应受沉积物结构的影响，并进一步影响潜存生物。因此，功能群落的丧失导致了河流生态状况的恶化。因此，在实施WFD时应考虑排序。

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引用次数: 0

Aquatic macroinvertebrates as indicators of water quality in the wetlands of the Chimborazo Wildlife Reserve – Ecuador 水生大型无脊椎动物作为厄瓜多尔钦博拉索野生动物保护区湿地水质指标

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-05-01 Epub Date: 2025-02-25 DOI: 10.1016/j.limno.2025.126234

Juan Carlos Carrasco-Baquero , Veronica Caballero-Serrano , Daisy Carolina Carrasco-López , Fernando Romero-Cañizares , David Alejandro León-Gualán , Jorge Daniel Córdova-Lliquin , Rufino Vieira-Lanero , Fernando Cobo-Gradín

The Chimborazo Wildlife Reserve (CR), located in central Ecuador, is home to 16 wetlands distributed in the provinces of Bolivar (7), Tungurahua (4) and Chimborazo (5), with altitudes ranging between 3 825 and 4 240 m above sea level (m.a.s.l.). The objective of the study was to analyse the ecological quality of the reserve's wetlands. Sampling units were established at three points per wetland to measure the physico-chemical variables of the water, which helped to validate the results obtained through macroinvertebrates, since if these organisms determine the ecological state of the wetlands, the physico-chemical analyses determine the reasons for pollution. Two methods were used to collect macroinvertebrates: direct capture and Surber net sampling. Three indices were calculated: Biological Monitoring Working Group for Colombia (BMWP/Col), Ephemeroptera, Plecoptera and Trichoptera (EPT), and Multimetric Index of Ecological Status for High Andean Rivers (IMEERA). A total of 8664 individuals belonging to 7 Classes, 12 Orders and 23 Families were identified, with the Family Hyalellidae being the most abundant. The physico-chemical variables indicated that the wetland water is suitable for agricultural irrigation and livestock use, but definitely not for human consumption. Similarly, the results of the 3 biological indices suggest that the waters should be classified as polluted and that therefore the catchment areas supplied by these ecosystems also constitute polluted aquatic systems. Hence the importance of adopting urgent and decisive measures for the conservation of these ecosystems, which constitute the main source of water supply for the communities that cohabit them.

钦博拉索野生动物保护区（CR）位于厄瓜多尔中部，拥有16个湿地，分布在玻利瓦尔省(7)、通古拉瓦省(4)和钦博拉索省(5)，海拔高度在3825米至4240米之间（海拔高度）。研究的目的是分析保护区湿地的生态质素。在每个湿地的三个点建立采样单元来测量水的物理化学变量，这有助于验证通过大型无脊椎动物获得的结果，因为如果这些生物决定了湿地的生态状态，则物理化学分析确定了污染的原因。大型无脊椎动物的采集方法主要有直接捕获法和索伯网法。计算了3个指标：哥伦比亚生物监测工作组（BMWP/Col）、蜉蝣目、翅翅目和毛翅目（EPT）和安第斯高原河流生态状况多指标（IMEERA）。共鉴定出7纲12目23科8664只，以透明藻科（Hyalellidae）最多。理化指标表明，湿地水适合农业灌溉和畜牧业使用，但不适合人类消费。同样，3种生物指数的结果表明，该水域应被列为受污染水域，因此这些生态系统提供的集水区也构成受污染的水生系统。因此，必须采取紧急和果断的措施来保护这些生态系统，因为这些生态系统是与它们共存的社区的主要供水来源。

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引用次数: 0

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 奥地利多瑙河水系中三种嗜流鱼类的生殖生态学：对Traisen河中鼻软骨瘤鱼、Barbus Barbus和Vimba Vimba的产卵和C. nasus幼虫发育的观察

IF 2 4区环境科学与生态学 Q2 LIMNOLOGY

Limnologica

Pub Date : 2025-05-01 Epub Date: 2025-04-11 DOI: 10.1016/j.limno.2025.126250

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

This study investigates the reproductive ecology of three rheophilic fish species (Chondrostoma nasus, Barbus barbus and Vimba vimba) in the River Traisen, Austria. The main objectives were to describe the spawning sites of these species and to describe the development of nase eggs and larvae in situ. The study also examines the immigration patterns from the Danube into the Traisen in relation to discharge and water temperature. The fieldwork was carried out between March and June 2020 in the lower reaches of the Traisen (11 km renaturalized river section and 4 km residual water section). In addition to visual counts, a drone (UAV) and underwater cameras were used to quantify and document spawning behavior. At the spawning sites the parameters water depth, flow velocity, temperature and substrate type were recorded. The spawning site characteristics of nase and barbel were consistent with previous studies. The vimba bream spawned at a water temperature of 13–17 °C, a water depth of 39 ± 9 cm and a flow velocity of 93 ± 19 cm/s and was described for the first time for a Central European river population. The development of the nase from eggs to fry was documented in the field; the incubation of the eggs lasted 30 days with a mean water temperature of 11.4 °C. Only a few barbel and vimba bream used the restored section for spawning, the majority of both and all nase spawned in the residual flow stretch upstream, where they were prevented from migrating further due to the low discharge.

本研究调查了奥地利Traisen河中三种嗜流鱼类（软骨瘤鱼、Barbus Barbus和Vimba Vimba）的生殖生态学。主要目的是描述这些物种的产卵地点，并描述原位卵和幼虫的发育。该研究还考察了多瑙河进入特拉森河的移民模式与流量和水温的关系。野外调查于2020年3月至6月在Traisen下游（11 km恢复河段和4 km残余水段）进行。除了视觉计数，无人机（UAV）和水下摄像机被用来量化和记录产卵行为。在产卵地点记录了水深、流速、温度和底物类型等参数。nase和barbel的产卵地点特征与前人的研究一致。vimba鲷鱼在13-17°C的水温、39 ± 9 cm的水深和93 ± 19 cm/s的流速下产卵，首次在中欧河流种群中被描述。现场记录了该病菌从卵到苗的发育过程；孵卵30 d，平均水温11.4℃。只有少数梭子鱼和梭子鱼利用恢复后的河段产卵，大部分梭子鱼和梭子鱼都是在剩余的河段上游产卵的，由于流量低，它们无法进一步迁移。

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引用次数: 0