Acta Limnologica Brasiliensia最新文献_第7页

Fish-food interaction network around cage fish farming in a neotropical reservoir 新热带水库网箱养鱼的鱼食相互作用网络

Acta Limnologica Brasiliensia Pub Date : 2021-08-11 DOI: 10.1590/s2179-975x10919

H. Brandão, D. Lange, D. Blanco, I. P. Ramos, Jamile Queiroz de Sousa, A. Nobile, E. D. Carvalho

{"title":"Fish-food interaction network around cage fish farming in a neotropical reservoir","authors":"H. Brandão, D. Lange, D. Blanco, I. P. Ramos, Jamile Queiroz de Sousa, A. Nobile, E. D. Carvalho","doi":"10.1590/s2179-975x10919","DOIUrl":"https://doi.org/10.1590/s2179-975x10919","url":null,"abstract":"Abstract: Aim Investigating whether wild fish accept residual ration from cage fish farming to the point of changing their diet and the fish-food interaction network. Methods The diet of fish species, Astyanax lacustris, Iheringichthys labrosus, Leporinus amblyrhynchus, Schizodon nasutus and Steindachnerina insculpta, bred in Chavantes Reservoir, Upper Paraná basin, was evaluated. Samples were collected on a monthly basis - from March 2008 to February 2009 - around the cage fish farming (NC) and in a reference site (RS) free from the influence of the fish farming activity. Results were analyzed through graphs and metrics of complex network analysis, and Permutational analysis of variance. Results The total number of 641 individuals belonging to all five fish species were collected, 292 in NC and 349 in RS. The total amount of food items consumed by them comprised 24 items in NC and 22 items in RS. The fish-food interaction network has shown nested pattern in the two evaluated areas, which evidenced the generalist structure of this interaction. Connectance values and mean degree of interaction networks were low. Detritus was the most representative item consumed in both sampling sites. Three of the five evaluated species (A. lacustris, S. nasutus and I. labrosus) had residual ration in their diet. Residual ration was the fourth most consumed item in NC. It was also the most representative food item for A. lacustris and S. nasutus. Conclusions Results have shown that cage fish farming activity can influence trophic interactions in aquatic systems, as well as evidenced the ability of S. nasutus, L. labrosus and A. lacustris to take advantage of new food items in their environment.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46808927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Periphytic algae biomass at different shading levels: an experimental approach 不同遮荫水平下围生藻类生物量的实验研究

Acta Limnologica Brasiliensia Pub Date : 2021-07-12 DOI: 10.1590/s2179-975x7520

H. S. Santos, L. Rodrigues

{"title":"Periphytic algae biomass at different shading levels: an experimental approach","authors":"H. S. Santos, L. Rodrigues","doi":"10.1590/s2179-975x7520","DOIUrl":"https://doi.org/10.1590/s2179-975x7520","url":null,"abstract":"Abstract: Aim Light is an essential component in the process of synthesis of organic compounds by photosynthetic organisms. Assuming that a higher level of luminosity would positively influence the production of biomass, we evaluated the influence of different levels of shading on the biomass of periphytic algae, through an experimental study. Methods Glass slides were used for this as an artificial substrate for the colonization and succession of algae in Garças Lake, on the upper Paraná River floodplain, and later transferred to nine aquaria. These were divided into three treatments: three without cover (AC), three with 50% shading screens (A50) and three with 80% shading screens (A80). Abiotic variables (pH, conductivity, turbidity, temperature and dissolved oxygen) and biomass were measured every five days for 15 days. The biomass was evaluated using the chlorophyll-a method. Concentrations of total phosphorus, phosphate, total nitrogen, nitrate and ammoniacal nitrogen were evaluated every five days. Results There was no significant variation of the biomass over time, however, there is a significant difference between the treatments. The highest biomass was found in the control treatment and the lowest was found in the treatment with 80% shading. The other limnological variables evaluated did not show significant changes over time. Conclusions The abiotic variables did not influence the biomass of the phycoperiphyton community, which was influenced only by luminosity. Thus, we conclude that light is a variable with direct influence on the production of periphytic biomass. At low intensity it is a variable that can limit the production of biomass. In high intensity however, it influences by increasing its production.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49542840","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The global scientific literature on applications and trends in the use of functional morphological groups in phytoplankton studies 关于功能形态学组在浮游植物研究中的应用和趋势的全球科学文献

Acta Limnologica Brasiliensia Pub Date : 2021-07-12 DOI: 10.1590/s2179-975x7220

Ricardina Maria Lemos Trindade, Anny Kelly Nascimento Ribeiro, J. Nabout, J. C. Bortolini

{"title":"The global scientific literature on applications and trends in the use of functional morphological groups in phytoplankton studies","authors":"Ricardina Maria Lemos Trindade, Anny Kelly Nascimento Ribeiro, J. Nabout, J. C. Bortolini","doi":"10.1590/s2179-975x7220","DOIUrl":"https://doi.org/10.1590/s2179-975x7220","url":null,"abstract":"Abstract: Aim The application of deconstructive approaches in aquatic ecology has been increasing recently. Especially for phytoplankton, some functional classifications summarize similar traits of a group of species to understand organisms’ response to landscape variability. One of these approaches deals with phytoplankton functional classification based on morphology (MBFG - Morphologically Based Functional Groups). Focusing on this approach, we systematic mapping the scientific literature to reveal this functional framework´s applications for freshwater phytoplankton. Methods For this study, we selected from the Thomson ISI Web of Science database all articles published between 2010 and 2018 dealing with MBFG. We recorded 179 manuscripts citing the phytoplankton functional classification based on morphology and, among them, we excluded three due to lack of access to information. Results A clear temporal trend occurred with an increase in citations involving the morphological approach, with Brazil, Uruguay, and China as the countries with the highest number of studies. Of the total records, 60 manuscripts applied morphological classification in their studies, of which 23 manuscripts comprised comparative studies with other functional approaches. Most applications were for phytoplankton in lakes, with biomass being the most used metric for framing taxa in MBFG. The most often recorded groups are MBFG IV (medium-sized organisms without specialization), VII (large mucilaginous colonies), and III (large filamentous organisms with aerotopes). Conclusion This study showed an increasing trend in the number of studies that used the functional approach based on MBFG. We believe that deconstructive approaches, such as MBFG, help assess issues of interest in phytoplankton ecology.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42370432","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Marine free-living nematodes in semiarid inland waters 半干旱内陆水域的海洋自由生活线虫

Acta Limnologica Brasiliensia Pub Date : 2021-06-14 DOI: 10.1590/S2179-975X6520

F. Barros, Maria Cristina da Silva, F. Castro, M. Nogueira Júnior

{"title":"Marine free-living nematodes in semiarid inland waters","authors":"F. Barros, Maria Cristina da Silva, F. Castro, M. Nogueira Júnior","doi":"10.1590/S2179-975X6520","DOIUrl":"https://doi.org/10.1590/S2179-975X6520","url":null,"abstract":"Abstract: Aim This study reports the occurrence of five Nematoda genera previously considered as exclusively marine in inland waters. Methods Sediment samples were taken, weekly, during nine weeks, at a small spring at the Horto Florestal Olho D’Agua da Bica, Cuite, PB, ca. 130 km away from the shoreline, between March and May 2016 and fixed in 4% formalin. Nematodes were sorted by manual elutriation through sieves with 0.5 and 0.045 mm and slides were prepared. Results The sediment was classified as coarse sand, with organic matter content ranging between 2.73 and 13.32%, temperature between 27-28°C and constant salinity of 6. From 315 nematodes were sampled among which 18 were from five genera previously thought to be exclusively marine were found. Bolbolaimus was the most common, found in 11.1% of the samples, followed by Gomphionema (3.7%), Rynchonema (7.4%), Prorynchonema (7.4%) e Sabatieria (3.7%), representing 5.7% from total of nematofauna. These genera are widely distributed worldwide, but had never been recorded from inland environments. Conclusions This study contributes with the distributional knowledge of free-living nematodes. From literature data, these genera are not restricted by low salinity, and can be found in estuarine and/or brackish water environments and body water with direct connection to the sea. In any case, the presence of marine genera in this region which is >130 km away from the nearest shoreline is noteworthy, highlighting the importance of studying nematodes from these poorly known semiarid water bodies. These new occurrences raise questionings about the dispersal mechanisms that certified the colonization of these nematodes in the semiarid.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44932974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Phytoplankton richness and abundance in response to seasonality and spatiality in a tropical reservoir 热带水库浮游植物丰富度和丰度对季节性和空间性的响应

Acta Limnologica Brasiliensia Pub Date : 2021-06-04 DOI: 10.1590/S2179-975X11419

Lyza Christine dos Santos Moura, Silvia Moreira dos Santos, Cláudia Alves de Souza, Carlos Roberto Alves dos Santos, J. C. Bortolini

{"title":"Phytoplankton richness and abundance in response to seasonality and spatiality in a tropical reservoir","authors":"Lyza Christine dos Santos Moura, Silvia Moreira dos Santos, Cláudia Alves de Souza, Carlos Roberto Alves dos Santos, J. C. Bortolini","doi":"10.1590/S2179-975X11419","DOIUrl":"https://doi.org/10.1590/S2179-975X11419","url":null,"abstract":"Abstract: Aim Species richness and abundance are important elements in understanding communities’ dynamics. In this way we evaluated the spatial and temporal variation of phytoplankton richness and density in a tropical reservoir, and its main drivers. We tested whether the temporal variability of the hydrological cycle influences the phytoplankton, in addition to testing the main environmental variables that influence richness and density. Methods Data from environmental variables and phytoplankton were sampled in different regions of Joao Leite reservoir, Goias, Brazil, during a dry and rainy period, and were analyzed by Principal Component Analysis, Student's t-test and Bioenv. Results We recorded distinct environmental scenarios between the dry and rainy period, with temporal differences in richness. Sixty-two taxa were recorded, with cyanobacterial predominance in both hydrological periods and in the lentic reservoir regions. Water temperature, pH, electrical conductivity, dissolved oxygen, turbidity, and nutrient concentrations were the main drivers of phytoplankton richness and density in our study. Conclusions The richness and abundance of species directly reflect the determining factors in the structure of communities, generating important information about ecosystem functions. Therefore, understanding the environmental variability on phytoplankton richness and abundance in tropical reservoirs is essential, since the construction of reservoirs influences aquatic biodiversity and the provision of ecosystem services.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49470686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Phosphorus and metals immobilization by periphyton in a shallow eutrophic reservoir 浅层富营养化水库周边生物对磷和金属的固定化作用

Acta Limnologica Brasiliensia Pub Date : 2021-06-02 DOI: 10.1590/S2179-975X0320

Murilo Guimarães Balle, C. Ferragut, L. H. Coelho, Tatiane Araujo de Jesus

{"title":"Phosphorus and metals immobilization by periphyton in a shallow eutrophic reservoir","authors":"Murilo Guimarães Balle, C. Ferragut, L. H. Coelho, Tatiane Araujo de Jesus","doi":"10.1590/S2179-975X0320","DOIUrl":"https://doi.org/10.1590/S2179-975X0320","url":null,"abstract":"Abstract: Aim: This study evaluated and compared the changes in the Total Phosphorus (TP) and metals (Cd, Cu, Ni and Pb) contents and accumulation rates in the periphyton on different substrate types (PET and glass) in wet and dry periods in a shallow eutrophic reservoir. Thus, the potential of periphyton as a green biotechnology to remediate the eutrophication and promoting metal uptake were investigated. Methods: Floating substrate carriers made of wood (n = 3) containing glass and PET slides were submerged close to a sewage inflow site. Substrate exposure time was about 33 days in each period. Results: Periphyton TP and metal contents (Cu, Ni and Pb) were influenced by seasonality and the highest contents were found in the wet period. Periphyton metal contents were significantly different between glass or PET substrates, but no differences were detected in the TP contents. Conclusions: Seasonality was a determining factor for immobilization of TP and metals in periphyton. The highest potential of TP and metals immobilization by periphyton were detected in the wet period. Our results provided insights that the periphyton can contribute to remediate eutrophication and metal removal in aquatic ecosystems.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47391600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evaluating the periphyton as a bioreactor for removal of nutrients in a shallow hypereutrophic reservoir 评价外植体作为生物反应器去除浅层富营养化水库中的营养物质

Acta Limnologica Brasiliensia Pub Date : 2021-05-26 DOI: 10.1590/S2179-975X8920

Suele Aparecida Mendes-Santos, C. Ferragut

{"title":"Evaluating the periphyton as a bioreactor for removal of nutrients in a shallow hypereutrophic reservoir","authors":"Suele Aparecida Mendes-Santos, C. Ferragut","doi":"10.1590/S2179-975X8920","DOIUrl":"https://doi.org/10.1590/S2179-975X8920","url":null,"abstract":"Abstract: Aim We evaluated the periphyton on artificial substrate in the treated sewage effluent, effluent patch, inside and after the macrophyte stand in a shallow hypereutrophic reservoir. Specifically, we investigated the relationship between N and P contents and algal biomass in the periphyton with N and P availability, focusing on nutrient retention. Methods Periphyton sampling was performed at the effluent inlet, effluent path, inside, and two sites after macrophyte stand. Periphyton sampling was performed after 30 days of colonization. Abiotic variables were determined in the sewage effluent and in the reservoir water. Results Biomass and N and P contents in the periphyton were significantly different among sampling sites. The highest nutrient concentrations were found in the sampling sites with effluent. The highest periphyton chlorophyll-a were found inside and after the macrophyte stand, while N and P contents were the highest in the effluent inlet and effluent. Conclusions In conclusion, N and P contents in the periphyton were associated with N and P availability, evidencing the ability of nutrient retention of the community. Our findings suggest that periphyton on artificial substrate can as a potential tool for removing N and P from the effluent from the sewage treatment system, contributing to minimizing the nutrient load discharged in a shallow reservoir.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48262424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Optimized and validated protocol to the detection of the invasive bivalve Limnoperna fortunei from eDNA plankton samples 从eDNA浮游生物样本中检测入侵双壳类龙须藻的优化和验证方案

Acta Limnologica Brasiliensia Pub Date : 2021-05-26 DOI: 10.1590/S2179-975X7620

Josiane Ribolli, Sophia Cassol, Samara Hermes Silva, E. Zaniboni Filho, F. L. Zacchi, J. Mattos, Grasiela Fagundes Minatto Cardoso, A. Nuñer

引用次数: 2

Sediment phosphorus fractionation and flux in a tropical shallow lake 热带浅湖沉积物磷的分馏和通量

Acta Limnologica Brasiliensia Pub Date : 2021-05-14 DOI: 10.1590/S2179-975X9020

Jéssica Papera, F. Araújo, V. Becker

{"title":"Sediment phosphorus fractionation and flux in a tropical shallow lake","authors":"Jéssica Papera, F. Araújo, V. Becker","doi":"10.1590/S2179-975X9020","DOIUrl":"https://doi.org/10.1590/S2179-975X9020","url":null,"abstract":"Abstract: Aim The aim of the present study is to evaluate the potential phosphorus (P) release from the sediment to the water column of a tropical shallow lake in the northeast of Brazil, based on the sediment P fractions and on the flux of P between water and sediment. Methods We used a sequential extraction method to analyse the different P fractions of the sediment of Lake Extremoz. We also carried out a 40-day microcosm experiment to analyse the flux of P between water and sediment. We did so by flooding 200g of sediment from the lake with 800 mL of 1.2 µm filtered lake water in 1 L beakers. Every 5 days we analysed: soluble reactive phosphorus (SRP), total phosphorus (TP), organic phosphorus (Org-P), dissolved oxygen (DO), temperature, and pH of the water. Results The largest fraction of P in the sediment of Lake Extremoz is Refractory-P, which is non-mobile. The main mobile fraction of this lake’s sediment is composed of P bound to Fe and Mn oxides (BD-P) which is redox sensitive. During the P flux experiment, the water was always oxic and with nearly neutral pH, however the temperature increased by almost 4 °C due to the increase of the temperature of the air. SRP, TP and Org-P concentrations in the water had a general decrease in the first 20 days. But, on the second half of the experiment, those concentrations increased and the fluxes of P from sediment to water, mainly Org-P, were positive. Even with this increase in concentrations, indicating a period of P release, overall fluxes were negative. Conclusions The main mobile fraction of the sediment is redox sensitive, therefore it has the potential to be released in case of oxygen depletion. Under current conditions, most of the P released by the sediment is in organic forms, indicating that, in the presence of oxygen, the balance of P between water and sediment is controlled by the effects of organisms on P as well as temperature.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44970758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Bait efficiency to monitor mandi (Pimelodus maculatus) in the tailrace of hydropower dams, Southeast Brazil 巴西东南部水电站坝尾水系曼陀罗(Pimelodus maculatus)饵效监测

Acta Limnologica Brasiliensia Pub Date : 2021-05-14 DOI: 10.1590/S2179-975X3320

Alexandre Peressin, R. C. C. Souza, A. L. Godinho

{"title":"Bait efficiency to monitor mandi (Pimelodus maculatus) in the tailrace of hydropower dams, Southeast Brazil","authors":"Alexandre Peressin, R. C. C. Souza, A. L. Godinho","doi":"10.1590/S2179-975X3320","DOIUrl":"https://doi.org/10.1590/S2179-975X3320","url":null,"abstract":"Abstract: Aim This study compared the efficiency of two baits (earthworm and cow heart) for monitoring the abundance of mandi catfish (Pimelodus maculatus) in the tailrace of hydropower dams, one of the commonly killed fish in turbine procedures. Methods Sampling occurred every two months from February 2014 to December 2015 at the Camargos and Itutinga hydropower dams, located in the upper Paraná River basin, using hooks baited with earthworm and cow heart. We used generalized linear models to test the influence of dam, bait type, dam outflow discharge, water temperature, transparency, and dissolved oxygen on mandi abundance, calculated as catch per unit effort. Results Most mandi (73%) were caught using earthworms but catch per unit effort of mandi for both baits showed the same pattern of seasonal variation at each dam. At both dams, individuals of mandi sampled using earthworms were smaller than those sampled using cow heart, and water temperature was the only environmental variable significantly associated with the catch per unit effort of mandi. Conclusions Both baits are efficient to monitor seasonal variations in mandi abundance, which is influenced by water temperature. Monitoring the abundance of mandi in the tailrace can help minimizing fish mortality by scheduling risky turbine procedures for periods of lower mandi abundance.","PeriodicalId":38854,"journal":{"name":"Acta Limnologica Brasiliensia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44894273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0