Limnetica最新文献

{"title":"Add a dash of salt? Effects of road de-icing salt (NaCl) on benthic respiration and nutrient fluxes in freshwater sediments","authors":"C. Williams, P. Frost, B. Ginn, J. Marsalek, M. Xenopoulos","doi":"10.23818/limn.42.17","DOIUrl":"https://doi.org/10.23818/limn.42.17","url":null,"abstract":"Winter road salt applications are increasing chloride concentrations in many freshwater ecosystems. This trend is alarming, giv¬en chloride’s potential to impair aquatic ecosystems. Short- and long-term exposure to salt could affect ecosystem metabolism and nutrient cycles. Here, we examine connections between chloride concentrations, water quality conditions, benthic respi¬ration, and sediment-water nutrient flux throughout a large (722 km2) lake and its catchment. Aquatic locations experiencing high concentrations of chloride are indicators of anthropogenic activities and are often associated with additional pollutants. We used sediment core flow-through incubations under ambient and enriched chloride concentrations to determine the effects of road salt on benthic respiration and nutrient fluxes in stream, stormwater pond, and lake sites. Salt (as sodium chloride) ad¬ditions caused a significant overall increase in benthic respiration. Acute exposure to road salt caused the strongest increase in benthic respiration when water was warm and at sites that had low (< 50 mg Cl-/L) or high (> 400 mg Cl-/L) ambient chloride concentrations or when water was cold and sites had intermediate (100-400 mg Cl-/L) ambient chloride concentrations. Nitrate flux responded less uniformly to salt additions. Depending on waterbody type and season, ambient nitrate flux into the sediment was similar, increased, or decreased post-chloride addition. Dissolved phosphorus flux was not significantly impacted by salt additions. Across lake and stream sites, our results supported the hypothesis that chloride causes increased respiration while nutrient cycles were weakly and inconsistently altered under experimental pulse road salt additions.","PeriodicalId":49906,"journal":{"name":"Limnetica","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46945243","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}

{"title":"La comunidad de ostrácodos en humedales del sudeste de la Península Ibérica","authors":"Juan Diego Gilbert, Fernando Ortega, Raquel Jiménez-Melero, Á. Baltanás, Francisco Guerrero","doi":"10.23818/limn.42.18","DOIUrl":"https://doi.org/10.23818/limn.42.18","url":null,"abstract":"Se muestran los primeros datos sobre la comunidad de ostrácodos en los humedales del sudeste de España (provincias de Jaén y Córdoba). Se han estudiado un total de 21 humedales, habiéndose registrado la presencia de 12 especies de ostrácodos, pertenecientes a 8 géneros diferentes. Los valores de singularidad muestran la importancia de los humedales temporales y salinos para esta comunidad biótica. Esta aportación pone en valor la necesidad de incrementar el conocimiento que se tiene sobre la distribución y ecología de las especies de ostrácodos en la Península Ibérica.","PeriodicalId":49906,"journal":{"name":"Limnetica","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45957161","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}

{"title":"Land-use effects on aquatic macroinvertebrate diversity in subtropical highland grasslands streams","authors":"J. Bacca, Emanuel Rampanelli Cararo, Cássia Alves Lima-Rezende, Renato Tavares Martins, L. E. Macedo-Reis, J. Dal Magro, Renan de Souza Rezende","doi":"10.23818/limn.42.16","DOIUrl":"https://doi.org/10.23818/limn.42.16","url":null,"abstract":"Knowledge of the frequency and occurrence of macroinvertebrates throughout landscapes may clarify the effects of anthropic impacts on aquatic systems and help guide conservation actions for watersheds. We evaluated macroinvertebrate α and β diversity in streams in four different subtropical phytophysiognomies: highland grasslands with arboreal riparian vegetation, highland grasslands without arboreal riparian vegetation, mixed ombrophilous forest and silviculture. We also evaluated how environmental factors influence α diversity. We sampled macroinvertebrate communities (by Surber sampler), litter input (by nets) and physicochemical variables of the water (by multiparameter and chemical analysis) at 10 sites in riparian zones of a highland system. A total of 2124 individuals were sampled representing 41 taxa, with high α and β diversity in mixed ombrophilous forest. The results indicate that environmental heterogeneity increases food resource availability, as well as macroinvertebrate diversity. Furthermore, the β diversity was found to increase with distance among the unconnected streams. Areas of silviculture had the highest density values among the sampled areas due high organic material stock in the soil. Therefore, higher leaf litter input may decrease the toxicity effect of secondary compounds released by leaf plant decomposition compared to environments with low systemic leaf litter input, such as highland grasslands. The presence of arboreal riparian vegetation drives canopy openness, water temperature, dissolved oxygen, and orthophosphate in streams, which control the frequency and occurrence of benthic macroinvertebrates. Homogeneous systems, as naturally observed in highland grasslands, plus high canopy openness decrease macroinvertebrate richness and density. The naturally low richness of highland grasslands, although with endemic species, may be an important guideline for legislation on anthropic impacts, management, and conservation of streams in this specific subtropical zone.","PeriodicalId":49906,"journal":{"name":"Limnetica","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-02-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48754945","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}

{"title":"Bioaccumulation of metals and genotoxic effects in females of Colomesus asellus collected in an Amazon River estuary, Amapá, Brazil","authors":"Lucilene Finoto Viana, Debora Cristina Damasceno de Souza, E. Batista da Silva, Fábio Kummrow, Claudia Andrea Lima Cardoso, Nathalya Alice de Lima, B. Crispim, A. Barufatti, A. Florentino","doi":"10.23818/limn.42.15","DOIUrl":"https://doi.org/10.23818/limn.42.15","url":null,"abstract":"Colomesus asellus (Amazonian Puffer) is endemic to the Amazon Basin. It uses channels and streams to reproduce, spawn and feed. In areas close to urban centers, these fish may be exposed to anthropogenic residues containing mixtures of metals that can be bioaccumulated, resulting in genetic alterations. Therefore, we aimed to determine the extent of nuclear alterations in erythrocytes of female C. asellus resulting from the bioaccumulation of metals in tissues and organs. Metal concentrations were analyzed by atomic absorption spectrophotometry. Tissue metal concentrations decreased in the following order: Fe > Zn > Cu > Mn > Hg > Pb > Ni > Cd > Cr. In fish tissues/organs, the concentration of metals followed, in decreasing order, liver > skin > gonads > musculature > bones. The most frequent nuclear alterations were nuclear invagination, nuclear budding and lobulated nucleus. Metal concentrations and resultant nuclear alterations observed can damage C. asellus, thus compromising the conservation of this species at the mouth of the Amazon River.","PeriodicalId":49906,"journal":{"name":"Limnetica","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48985940","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}

{"title":"Composition and distribution of hyporheic and macrobenthic fauna in a Neotropical mountain river, Colombia","authors":"Yojana Valentina Ballesteros Navia, J. C. Cantera Kintz, E. J. Peña Salamanca, Gabriel Pinilla Agudelo","doi":"10.23818/limn.42.12","DOIUrl":"https://doi.org/10.23818/limn.42.12","url":null,"abstract":"This study examined the composition and diversity of the invertebrate communities that inhabit the hyporheic zone (HZ) in the upper and lower basins of the Dagua River, a tropical mountain stream, and their relationship with the macrobenthic fauna. In the HZ, different taxa were collected, many of which have been reported in several regions worldwide, suggesting that the biodiversity of the hyporheic community in Colombian rivers may be high. Although the hyporheic and macrobenthic fauna shared a moderate percentage (> 50 %) of taxa, their ecological structures were different. The analysis of hyporheic filtrate water showed the presence of microplastic (MP) fibers as well as fauna, a condition that, based on the literature review, could represent a risk for the normal functioning of this river ecosystem.","PeriodicalId":49906,"journal":{"name":"Limnetica","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45378680","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}

{"title":"First record of Linderiella jebalae Boix, Sala, Escoriza & Alonso 2016 (Crustacea, Branchiopoda, Anostraca) in the Iberian Peninsula. Dispersal across the Strait of Gibraltar?","authors":"J. García‐de‐Lomas, M. Ventura, C. M. García, Jenny Caner, Francisco A. Jiménez-Cantizano, M. Alonso, F. Hortas","doi":"10.23818/limn.42.19","DOIUrl":"https://doi.org/10.23818/limn.42.19","url":null,"abstract":"We report the first record of Linderiella jebalae in the Iberian Peninsula from two temporary ponds in La Línea de la Concep¬ción (Cádiz, southern Spain). This species was described in 2016 in the Moroccan Atlas Mountain range on the other side of the Strait of Gibraltar, 102 km away from this new Iberian location. Sequencing a fragment of cytochrome c oxidase subunit I (COI) showed a higher genetic diversity in Morocco, but only one haplotype in the Iberian populations, suggesting recent dis¬persal from Morocco to Spain, possibly mediated by birds through their annual migrations. This finding increases the diversity of anostraceans in the Iberian Peninsula to 16 species.","PeriodicalId":49906,"journal":{"name":"Limnetica","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42756570","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}

{"title":"Doing Science in Ecology. Does river flow show a path?","authors":"S. Sabater","doi":"10.23818/limn.42.20","DOIUrl":"https://doi.org/10.23818/limn.42.20","url":null,"abstract":"Rivers are submitted to deep and irreversible changes concerning their physical integrity (habitat simplification and loss) and water quantity (forcing of the global water cycle). The horizontal and hierarchical structure of river networks facilitates that impacts caused at the local scale may become relevant at higher scales, and therefore we face impacts which trespass the background of river ecologists. While we have progressed by incorporating many aspects of physical, chemical, and biological components of river ecosystems, the new challenges ahead imposed by global change complicate achieving operational predictions. I propose enhancing our connection to other experts, such as chemists, engineers, or land planners, to expand our current paradigms. I see that enforcing multidisciplinary collaboration is deemed essential to disentangle challenges that humankind has regarding river ecosystems. I assume that this will return as a progress and improvement of common scientific knowledge and applicability, stronger and more valuable for the sake of the conservation of our rivers.","PeriodicalId":49906,"journal":{"name":"Limnetica","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43283265","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}

{"title":"The response of freshwater plankton communities to temporal concurrence of agrochemical mixtures","authors":"A. del Arco, G. Parra, A. Downing","doi":"10.23818/limn.42.14","DOIUrl":"https://doi.org/10.23818/limn.42.14","url":null,"abstract":"Freshwater ecosystems regularly experience pulsed inputs of nutrients and other pollutants as a result of temporally variable applications of agrochemicals combined with runoff events. In this study, we evaluate how planktonic communities respond to repeated and pulsed insecticide disturbances and if the response depends on temporal concurrence with nutrient pulses. We conducted an experiment using mesocosms to assess the ecotoxicological effects of a commonly used insecticide (chlorpyrifos) and nutrients (nitrogen and phosphorus) on plankton communities. The mesocosms (300 L) were established outdoors for 10 weeks. The experiment consisted of 3 treatments: nutrient pulse of nitrogen and phosphorus every two weeks (N; considered as control), nutrients and insecticide pulsed simultaneously every two weeks (NI), and nutrients and insecticide pulsed in alternating weeks (N_I). Insecticide and nutrient pulses consisted of 2 μg/L of chlorpyrifos, 560 μg/L of nitrogen, and 39.9 μg/L of phosphorus. Zooplankton abundance, community structure, and diversity were used as structural indicators. Chlorophyll a and net production were used as functional indicators. We found no effect of the treatments on zooplankton abundance, while richness and Shannon diversity was lower in treatments with pulsed insecticide (NI and N_I) compared to control treatment (N). Phytoplankton biomass was higher in the treatments with insecticide than in the controls (N). Higher phytoplankton biomass could be explained by an indirect effect shift from a cladocera-dominated to a copepod-dominated community in response to the insecticide treatment. Overall, the insecticide disturbance had direct and indirect effects on the community and did not depend on whether insecticides were pulsed synchronously or asynchronously with nutrients.","PeriodicalId":49906,"journal":{"name":"Limnetica","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48297391","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}

{"title":"First records of Ulvella spongophila (Ulvophyceae: Ulvellaceae) for the Palaearctic region: the discovery of four populations in the SW Iberian Peninsula","authors":"A. Mellado-Díaz, María Verdugo-Althöfer, L. Monteagudo, J. Moreno","doi":"10.23818/limn.42.13","DOIUrl":"https://doi.org/10.23818/limn.42.13","url":null,"abstract":"During extensive Spanish river macrophyte and invertebrate surveys, the freshwater chlorophyte Ulvella spongophila was detected growing inside the freshwater sponge Ephydatia fluviatilis attached to stones. This finding is relevant from the phy¬cological, biogeographical and ecological points of view, and is the second world record of the species after one single known locality (Lake Manindjau, Sumatra, Malaysia), from which the species was collected and described around 130 years ago. The species was collected under summer base-flow conditions in four Mediterranean temporary/seasonal streams in 2018 and 2019. New information about the species’ morphological characteristics and ecological preferences in the Iberian Peninsula is presented. A comparative description of the observed specimens with previously published data, some biogeographical aspects of findings, certain biological facets of the sponge-algal association, and its conservation status, are discussed.","PeriodicalId":49906,"journal":{"name":"Limnetica","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49572856","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}

{"title":"Temporal stability in beta diversity does not guarantee surrogacy or compositional stability in a micro-phytoplankton metacommunity","authors":"Marina Ferraz Sampaio, P. C. Ferreira, T. A. Veiga Ludwig, A. Padial","doi":"10.23818/limn.42.10","DOIUrl":"https://doi.org/10.23818/limn.42.10","url":null,"abstract":"Temporal stability in beta diversity does not guarantee surrogacy or compositional stability in a micro-phytoplankton meta¬community. In this study, we evaluated phytoplankton community organization (i.e., microalgae filtered in 20 μm mesh-sized plankton net) in a highly dynamic subtropical tidal river over three years. Specifically, we assessed temporal stability in the spatial organization of phytoplankton, the diatoms’ efficiency as an indicator (surrogate group) of ecological patterns of other phytoplankton groups, the temporal variation in species composition, and the beta diversity of a metacommunity. We performed six sampling occasions at the end of the summers and winters from 2017 to 2019 at 16 sampling points comprising a strong en¬vironmental gradient in the Guaraguaçu River, South Brazil. We tested for correlations of community structures from different periods and for correlations between diatoms species and those from other phytoplankton groups using Mantel tests. Species compositions were compared among periods using a permutational multivariate analysis of variance, and temporal variation in metacommunity beta diversity was evaluated using null models. There was temporal stability in the spatial dissimilarities of communities. Diatoms were poorly correlated with the other phytoplankton groups. The temporal stability in spatial structure, a facet of beta diversity, was in line with the temporal stability in compositional variation – a measurement of metacommuni¬ty beta diversity. Our results also showed that such stability was not static, since community compositions varied over time, mainly between seasons. We conclude that even in a highly dynamic tidal river, the temporal stability of spatial organization may indicate that the spatial gradient is so strong that it maintains spatial structuring over time. Such patterns were maintained even with the dynamic species changes over seasons. The fact that different phytoplankton groups do not respond similarly to the spatial gradient reinforces that microalgae should be analyzed separately in ecological studies, and long-term monitoring should consider different algal groups for a complete assessment of ecological patterns.","PeriodicalId":49906,"journal":{"name":"Limnetica","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44923861","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}