Relevant bibliographies by topics / Freshwater biota

Academic literature on the topic 'Freshwater biota'

Author: Grafiati
Published: 10 December 2022
Last updated: 19 February 2023

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Journal articles on the topic "Freshwater biota"

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Hasler, Caleb T., David Butman, Jennifer D. Jeffrey, and Cory D. Suski. "Freshwater biota and rising pCO2?" Ecology Letters 19, no. 1 (November 27, 2015): 98–108. http://dx.doi.org/10.1111/ele.12549.

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Wright, D. A., and P. M. Welbourn. "Cadmium in the aquatic environment: a review of ecological, physiological, and toxicological effects on biota." Environmental Reviews 2, no. 2 (July 1, 1994): 187–214. http://dx.doi.org/10.1139/a94-012.

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Cadmium is a nonessential element that can be toxic and carcinogenic. On a global scale, the ratio anthropogenic to natural emissions of cadmium is approximately 7:1. Sources of cadmium for freshwater and salt water include atmospheric deposition, direct and via runoff, as well as direct discharges into water or watersheds. Thirty percent of the atmospheric emissions fall onto water. In freshwater, the cadmium ion is the predominant dissolved form, while in seawater, chloride dominates. Much of the cadmium added to aquatic systems accumulates in sediments where it presents a risk to benthic biota and under certain conditions may reenter the water column. The cadmium ion is the most bioavailable to aquatic biota; factors affecting availability include salinity, dissolved organic matter, and hydrogen ion concentration, which affect the chemical forms of cadmium. Hydrogen and other ions, most notably calcium, also affect cadmium uptake and toxicity, through competition and physiological effects. The concentrations of cadmium that result in acute or chronic toxicity vary over several orders of magnitude, with certain freshwater fish and invertebrates being the most sensitive. Long-term field experiments and chronic toxicity tests on invertebrates suggest that the present Canadian guideline of 200 ng Cd∙L−1 for the protection of freshwater biota may be too high. Aquatic animals and plants, like most organisms, produce metal binding proteins, called metallothioneins, in response to cadmium. Some species or varieties within a species of aquatic biota are tolerant to cadmium. The relationship between cadmium tolerance and metallothionein is still incompletely resolved.Key words: cadmium, seawater, freshwater, availability, toxicity, metallothionein, tolerance, food chain.
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Oikonomou, Anthi, and Konstantinos Stefanidis. "α- and β-Diversity Patterns of Macrophytes and Freshwater Fishes are Driven by Different Factors and Processes in Lakes of the Unexplored Southern Balkan Biodiversity Hotspot." Water 12, no. 7 (July 13, 2020): 1984. http://dx.doi.org/10.3390/w12071984.

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Disentangling the main drivers of species richness and community composition is a central theme in ecology. Freshwater biodiversity patterns have been poorly explored; yet, it has been shown that different freshwater biota have different, often contrasting responses to environmental gradients. In this study, we investigated the relative contribution of geographical and environmental (habitat-, climate- and water quality-related) factors/gradients in shaping the α- and β-diversity patterns of macrophytes and fish in sixteen natural freshwater lakes of an unexplored Balkan biodiversity hotspot, the Southern Balkan Peninsula. We employed generalized linear modeling to identify drivers of α-diversity, and generalized dissimilarity modeling to explore commonalities and dissimilarities of among-biota β-diversity. Species richness of both biota was significantly associated with lake surface area, whereas macrophytes had an inverse response to altitude, compared to fish. Both species turnover and nestedness significantly contributed to the total β-diversity of macrophytes. In contrast, species turnover was the most significant contributor to the total fish β-diversity. We found that the compositional variation of macrophytes is primarily limited by dispersal and ultimately shaped by environmental drivers, resulting in spatially structured assemblages. Fish communities were primarily shaped by altitude, highlighting the role of species sorting. We conclude that among-biota diversity patterns are shaped by different/contrasting factors, and, thus, effective/sustainable conservation strategies should encompass multiple aquatic biota.
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Schofield, Kate A., Laurie C. Alexander, Caroline E. Ridley, Melanie K. Vanderhoof, Ken M. Fritz, Bradley C. Autrey, Julie E. DeMeester, et al. "Biota Connect Aquatic Habitats throughout Freshwater Ecosystem Mosaics." JAWRA Journal of the American Water Resources Association 54, no. 2 (March 1, 2018): 372–99. http://dx.doi.org/10.1111/1752-1688.12634.

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Sansone, Umberto, Maria Belli, Michele Riccardi, Anna Alonzi, Zvonka Jeran, Jacimovic Radojko, Borut Smodis, Marco Montanari, and Fabio Cavolo. "Adhesion of water-borne particulates on freshwater biota." Science of The Total Environment 219, no. 1 (August 1998): 21–28. http://dx.doi.org/10.1016/s0048-9697(98)00235-6.

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Fent, Karl, and Judith Hunn. "Phenyltins in water, sediment, and biota of freshwater marinas." Environmental Science & Technology 25, no. 5 (May 1991): 956–63. http://dx.doi.org/10.1021/es00017a020.

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Poston, Ted M., Don C. Klopfer, and Mary Ann Simmons. "Short-term Bioconcentration Studies of Np in Freshwater Biota." Health Physics 59, no. 6 (December 1990): 869–77. http://dx.doi.org/10.1097/00004032-199012000-00010.

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Nielsen, D. L., M. A. Brock, G. N. Rees, and D. S. Baldwin. "Effects of increasing salinity on freshwater ecosystems in Australia." Australian Journal of Botany 51, no. 6 (2003): 655. http://dx.doi.org/10.1071/bt02115.

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Salt is a natural component of the Australian landscape to which a number of biota inhabiting rivers and wetlands are adapted. Under natural flow conditions periods of low flow have resulted in the concentration of salts in wetlands and riverine pools. The organisms of these systems survive these salinities by tolerance or avoidance. Freshwater ecosystems in Australia are now becoming increasingly threatened by salinity because of rising saline groundwater and modification of the water regime reducing the frequency of high-flow (flushing) events, resulting in an accumulation of salt. Available data suggest that aquatic biota will be adversely affected as salinity exceeds 1000 mg L–1 (1500 EC) but there is limited information on how increasing salinity will affect the various life stages of the biota. Salinisation can lead to changes in the physical environment that will affect ecosystem processes. However, we know little about how salinity interacts with the way nutrients and carbon are processed within an ecosystem. This paper updates the knowledge base on how salinity affects the physical and biotic components of aquatic ecosystems and explores the needs for information on how structure and function of aquatic ecosystems change with increasing salinity.
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Pierson, W. L., R. Nittim, M. J. Chadwick, K. A. Bishop, and P. R. Horton. "Assessment of changes to saltwater/freshwater habitat from reductions in flow to the Richmond River estuary, Australia." Water Science and Technology 43, no. 9 (May 1, 2001): 89–97. http://dx.doi.org/10.2166/wst.2001.0515.

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The Australian climate is highly variable and many Australian estuaries lack a seasonal pattern of freshwater flow. During periods of low freshwater inflow, saline waters enter from the ocean through the estuary mouth. These saline waters enter as density currents or as a result of tidal mixing. During periods of high freshwater inflow from the estuary catchment, salt water is flushed towards the estuary mouth. As a consequence, the saline structure of Australian estuaries can be highly variable, depending on the antecedent rainfall. The Richmond River in northern New South Wales is such an estuary. The biota inhabiting estuaries have varying levels of freshwater and saltwater tolerance and reducing the freshwater flow into and along an estuary will favour saltwater species. However, if extractions of freshwater from an estuary are sufficiently high, freshwater habitat could be eliminated entirely for short periods (~one month) but with consequent, and perhaps long-standing, damage to the environment. This contribution describes a new approach to quantify the impact of changes to freshwater flows to the Richmond River estuary. This approach includes a review of hydrological data gathered over the past century and includes a detailed assessment of: changes to the highly variable freshwater inflows and freshwater extraction below the tidal limit; consequent changes to the highly variable saline structure; and the risk to aquatic biota. The crucial factors of magnitude, frequency and duration of short-term intrusions of saline water into freshwater habitat and their impact are quantified by the methods developed.
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Ebtesam Kadem Khudher and Ahmed Sabah AL-Jasimee. "Diatoms (Bacillariophyta) as bio-indicators." International Journal of Research in Pharmaceutical Sciences 10, no. 2 (April 17, 2019): 1562–65. http://dx.doi.org/10.26452/ijrps.v10i2.1354.

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Bio-indicators such as diatoms from algae considered to be key factors in ecological studies as an assessment of freshwater ecology. Algae are very sensitive to environmental changes and reflect the spatiotemporal changes on exists or biomass of diatoms in waters. Diatoms have been used not just for the assessment of water quality, but also can be used as an organic pollution indicator in the freshwater ecosystems, such as algal water bloom. The reason for using diatoms as bio-indicators was for several characteristics such as rapid growth, and represent high biomass in the freshwater ecosystem. Also, diatoms have high biodiversity among the other aquatic biota and energy flow and cycling. Compared with the other aquatic biota, diatoms reflect ecological disturbance due to high sensitivity to light, temperature, water flow, pH, and oxygen content. Additionally, diatoms are used as an assessment of eutrophication, organic pollution and climate change.
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Dissertations / Theses on the topic "Freshwater biota"

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Motitsoe, Samuel Nkopane. "Mapping Nitrogen Loading in Freshwater Systems: Using Aquatic Biota to Trace Nutrients." Thesis, Rhodes University, 2016. http://hdl.handle.net/10962/d1020819.

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The majority of river systems in developing countries like South Africa, are found in catchments areas that are densely human populated, therefore are subjected to intense land-use and developmental pressures. Anthropogenic nutrient pollution or the excessive addition of nutrients is one important type of stressors that river systems often experience through intense land-use, which includes poor waste management and agricultural practices. Such events are referred to as the “urban syndrome”, were human populations and developmental demands outpace ecosystem services. Traditional measurements of water quality (e.g. physicochemical and micro-nutrient assessments) and biological monitoring (e.g. South African Scoring System 5, SASS5) techniques for assessing ecosystem health have being widely used to reflect the ecological health and status of river systems. However these techniques have a number of challenges associated with their application. SASS5 which is used most prevalently in southern Africa for example, can only be applied in lotic systems, it is habitat dependent and finally (but arguably most importantly) it cannot identify the source of pollution inputs. Recent laboratory studies using stable isotopic ratios (δ15N and δ13C) of aquatic macrophytes (duckweed: Spirodela sp.) have shown successful differentiation between different N-sources and the mapping of temporal and spatial nitrogen dynamics in freshwater systems. Furthermore δ15N isotopic values of Spirodela sp. showed the capability to act as an early warning indicator of eutrophication, before the onset of aquatic ecosystem degradation. Therefore, this study aimed to field test the potential of sewage plume mapping using the stable isotopic values of Spirodela sp. and aquatic macroinvertebrates at nine study sites on the Bloukrans-Kowie River and ten study sites on the Bushman-New Year’s River systems in the Eastern Cape, South Africa. And more...
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Stendera, Sonja Johnson Richard K. "Spatiotemporal variability of chemistry and biota in boreal surface waters : a multiscale analysis of patterns and processes /." Uppsala : Swedish University of Agricultural Sciences, 2005. http://diss-epsilon.slu.se/archive/00000956/.

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Thesis (doctoral)--Swedish University of Agricultural Sciences, 2005.
Thesis documentation sheet inserted. Appendix reproduces four papers and manuscripts co-authored with R.K. Johnson. Issued also electronically via World Wide Web in PDF format; online version lacks appendix.
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Laurenson, Lawrie Jon Bain. "Colonisation theory and invasive biota : the Great Fish river, a case history." Thesis, Rhodes University, 1986. http://hdl.handle.net/10962/d1005905.

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Colonisation theory relative to introduced populations was examined with a view to determining the usefulness of theoretical concepts in the prediction of the success of an invasion by a species. To this end, the Great Fish River, with reference to species introduced by the Orange/Fish Tunnel, was used as a case history. It was concluded that theoretical descriptions of population growth, control and decline are useful only when considering individual ecosystems or species. The highly variable nature of species and environments nullifies attempts to simplify behavioural characteristics into a predictive framework. There is an abundance of terminology associated with introduced organisms and frequently many of these terms are used synonymously. Eleven terms have been defined in this thesis with a view to standardising terminology. Characteristics of species and environments which enhance their susceptibility to invasions by exotic ichthyofauna were discussed and summarised. Distribution data concerning exotic fish introduced into the Great Fish River by the Orange/Fish Tunnel has demonstrated that, with the exception of Clarias gariepinus, all remaining exotics have restricted distributions. Only Barbus aeneus appears to be extending its range down the drainage. Age, Growth, reproduction and condition data support the conclusion that, excluding B. aeneus and C. gariepinus, invasive species in the drainage are not performing well. Of the five invasive species (B. aeneus, Labeo capensis, L. umbratus, Gephyroglanis sclateri and Cyprinus carpio), only two have established populations (B. aeneus· and C. gariepinus). Labeo umbratus and C. carpio were present on the Great Fish River prior to the construction of the tunnel and populations of the species could not be distinguished. It was concluded that there is no evidence to suggest that exotic species introduced into the Great Fish River are having a deleterious effect on indigenous, endangered ichthyofauna. Monitoring of the drainage should be continued to ensure that a danger to indigenous species does not develop.
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Stendera, Sonja. "Spatiotemporal variability of chemistry and biota in boreal surface waters : a multiscale analysis of patterns and processes /." Uppsala : Dept. of Environmental Assessment, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/200595.pdf.

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Sholihah, Arni. "Diversification des biotas aquatiques de Sundaland : accumulation de la biodiversité chez les poissons d'eau douce et distribution dans un hotspot de biodiversité." Thesis, Montpellier, 2020. http://www.theses.fr/2020MONTG024.

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Sundaland est l'un des points chauds de biodiversité les plus menacés, en raison d’une augmentation rapide des menaces au cours des dernières décennies. Couvrant la péninsule malaise, Sumatra, Java et Bornéo, cette région possède l'une des plus grandes richesses en espèces et endémisme pour les vertébrés, y compris les poissons d'eau douce. Cette biodiversité a longtemps attiré l'attention des biologistes évolutionnistes, notamment en raison de la complexité de l'histoire géologique de Sundaland. Cette question a été abordée en explorant les patrons de fragmentation et dispersion durant la diversification des espèces de poissons d'eau douce de Sundaland. Ainsi, j'ai d'abord cherché à évaluer la correspondance entre la distribution des lignées moléculaires de plusieurs taxons avec les limites des paléorivières en ré-analysant les données moléculaires existantes avec une couverture biologique et spatiale représentative en Asie du Sud-Est (en particulier pour Sundaland). Deuxièmement, je me suis concentré sur l’estimation de l’âge des clades et de la répartition géographique des lignées de Rasborinae, un groupe répandu et extrêmement diversifié de poissons d’eau douce primaires du Sundaland, pour tester l’hypothèse des Paléorivières du Pléistocène en utilisant des données empiriques nouvellement générées. Sur les deux études, je me suis posé les questions suivantes: 1) les paléorivières servaient-elles de corridors de dispersion entre les îles pendant les périodes glaciaires du Pléistocène; 2) les bassins versants des paléorivières ont-ils initié une divergence allopatrique à travers leurs frontières; et 3) les fluctuations climatiques du Pléistocène ont-elles augmenté les taux de speciation. Dans l'ensemble, un niveau élevé de diversité cryptique est observé. Les aires ancestrales inférées révèlent une origine continentale des lignées de poissons d'eau douce de Sundaland, datée à l'Oligocène. Ce résultat valide l'hypothèse d’une installation pré-pléistocène. Ces lignées sont entrées à Sundaland par la paléorivière de la Sonde Nord à Bornéo et se sont dispersées par la suite via une dispersion à longue distance, souvent suivie de diversification in situ. Ces résultats suggèrent que la partie de Bornéo de la paléorivière de la Sonde Nord est le centre d'origine le plus probable des poissons d'eau douce de Sundaland. Contrairement à l'hypothèse initiale que l'abaissement du niveau de la mer en périodes glaciaires reconnecte les bassins versants au sein des paléorivières, cela n'ouvre pas nécessairement de canaux de dispersion inter-îles pour les poissons d'eau douce. Les couloirs de savane et d'écosystèmes forestiers saisonniers à l'intérieur du Sundaland ont servi de barrière à la dispersion. En outre, la perméabilité des limites physiques des bassins versants des paléorivières, ainsi que les variabilités géomorphologique et écologique ont créé temporairement des flux de gènes. Bien qu'une proportion significative des lignées de poissons d'eau douce du Sundaland datent du Pléistocène, nous avons constaté que la dynamique du Pléistocène n'affectait pas le taux de diversification. Les modèles de diversification dépendant du niveau de la mer expliquent mal les schémas de prolifération des espèces pour tous les clades, à l'exception de Channa. En outre, aucun des taxons examinés ne présente de taux de diversification en baisse comme le suggère le modèle de diversification dépendante de la diversité (DDD). Il est suggéré alors que les fluctuations eustatiques du Pléistocène et la dynamique des paléorivières ne sont pas les seuls moteurs de la diversification des poissons d'eau douce du Sundaland, mais seulement une partie des aspects abiotiques qui l'affectent. Les fluctuations climatiques du Pléistocène ont probablement interagi avec d'autres facteurs tels que: la géomorphologie du paysage, la variabilité des écosystèmes et les caractéristiques biologiques des organismes
Sundaland is one of the most threatened biodiversity hotspots, experiencing a fast increase of threat levels during last decades. Covering Malayan Peninsula, Sumatra, Java and Borneo, this hotspot has one of the highest species richness and endemism for vertebrates in SEA, including freshwater fishes. This level of biodiversity has long attracted the attention of evolutionary biologists, particularly by considering effects of Sundaland complex geological history. This study addressed it by exploring time frame of vicariance and dispersal during diversity build-up of freshwater fish species in Sundaland. To support this, we first aimed to assess the match between distribution of molecular lineages from multiple taxa with palaeoriver boundaries using metadata analysis of existing molecular dataset with representative biological and spatial coverage in Southeast Asia (especially in Sundaland). Second, we focussed on estimating clades’ age and geographic distribution of Rasbora lineages in relation to the Pleistocene Palaeoriver Hypothesis by utilising newly generated empirical data for Rasborinae, a widespread and extremely diversified group of primary freshwater fishes in Sundaland. On both steps, we questioned: 1) if palaeorivers served as corridors of dispersal between islands during Pleistocene sea levels low stands; 2) if palaeoriver watersheds initiated allopatric divergence across their boundaries; and 3) if Pleistocene climatic fluctuation increased rates of species diversification. Overall, this study detected high level of cryptic diversity. Ancestral area reconstructions revealed that Sundaland freshwater fish lineages originated from Mainland Asia, and further colonised the region since Oligocene. This result validated the pre-Pleistocene settlement hypothesis. These lineages entered Sundaland mainly through North Sunda palaeoriver in contemporary Borneo and dispersed to other parts of Sundaland via long distance dispersal, often followed by in situ diversification. These results suggest Bornean part of North Sunda palaeoriver is the most likely centre of origin for Sundaland freshwater fishes. Contrary to the initial hypothesis, we found that although lowered sea level during glacial periods reconnected watersheds within palaeorivers, it did not necessarily open up inter-island dispersal channels for freshwater fishes. Corridors of savanna and seasonal forest ecosystems in the interior of Sundaland served as barrier to dispersal. Also, permeability of the physical boundaries of palaeoriver’s watersheds as well as geomorphological and habitat variabilities within palaeoriver created respectively gene flow between palaeorivers and allopatric speciation within palaeoriver. Moreover, although significant proportion of Sundaland freshwater fish lineages originated during Pleistocene, we found that Pleistocene dynamics did not affect diversification rate as sea level-dependent diversification models poorly account for species proliferation patterns for all clades excepting Channa. Besides, none of the taxa examined has declining diversification rates as suggested by diversity-dependent diversification (DDD) model. It is suggested then that global Pleistocene eustatic fluctuation and regional paleoriver dynamics are not sole drivers for Sundaland freshwater fish diversification, but only a part of abiotic aspects affecting it. Pleistocene Climatic Fluctuations likely interacted with other factors such as: landscape geomorphology, local ecosystem/habitat variability and life history traits of organisms
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Monteiro, Bruna Ariana Ribeiro. "Assessing the impacts of cytostatic drugs on freshwater biota." Master's thesis, 2021. http://hdl.handle.net/10773/30682.

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Cytostatic drugs are a class of pharmaceuticals used for cancer treatment, whose incidence has been increasing. These drugs are excreted mainly via urine subsequently reaching wastewater treatment plants (WWTPs). However, WWPTs do not always possess the proper means to effectively eliminate these drugs, meaning that they continuously enter the environment where they might reach surface and drinking waters. Since most anticancer drugs possess carcinogenic, teratogenic, genotoxic, and mutagenic properties, they might pose a potential risk to environmental and human health. In this context, the present work aimed at assessing the ecotoxicity of three cytostatic drugs (cyclophosphamide - CYP, mycophenolate mofetil - MMF, and mycophenolic acid - MPA) on freshwater species representing different trophic levels and functional groups: the microalga Raphidocelis subcapitata, the rotifer Brachionus calyciflorus, and the fish Danio rerio. The following endpoints were monitored: yield and population growth rates for the alga after an exposure of 72h; mortality for the rotifer after an exposure of 24h, and mortality, hatching rates, and morphological abnormalities, for the fish after an exposure of 96h. Regarding the assays with the microalga, it was not possible to determine the values for the endpoints evaluated for MMF and MPA. However, for CYP an EC50,72h of 593.0 mg L-1 for biomass inhibition and an EC50,72h of 1108 mg L-1 for growth inhibition were determined. For rotifers, LC50,24h values could not be computed for MMF and MPA, since at the highest tested concentration (40 and 30 mg L-1 , respectively - corresponding to the solubility limits of the compounds) no mortality was observed. Though an LC50,24h of 6397 mg L-1 for CYP was determined. Overall, MMF and MPA proved to be the most toxic compounds for zebrafish assays, with LC50,96h values of 0.046 and 1.410 mg L-1 , respectively, against an LC50,96h of 1306 mg L-1 for CYP. All cytostatics caused morphological abnormalities on zebrafish embryos, that mainly included oedemas and spinal cord malformations. Based on these results, the predicted no effects concentrations (PNEC) were derived for each compound to calculate the risk quotient (RQ), that relates toxicity to environmental exposure. The predicted or measured environmental concentrations in superficial waters were retrieved from the literature. In general, CYP revealed a low risk for freshwater biota (RQ = 0.003), while MMF and MPA presented RQ values above 1 (RQ = 3.0 and 4.1, respectively), indicating a high risk to freshwater organisms.
Os citostáticos são uma classe de fármacos usados no tratamento do cancro, cuja incidência tem vindo a aumentar. Estes fármacos são excretados principalmente através da urina chegando, posteriormente, às estações de tratamento de águas residuais (ETARs). Contudo, as ETARs nem sempre possuem os meios adequados para conseguirem eliminar eficazmente estes fármacos, o que significa que eles entram de forma contínua no meio ambiente, podendo atingir águas superficiais e reservas de água potável. Uma vez que estes fármacos anticancerígenos possuem propriedades teratogénicas, carcinogénicas, genotóxicas e mutagénicas, eles podem apresentar um potencial risco para o ambiente e para a saúde humana. Neste contexto, o presente trabalho visou avaliar a ecotoxicidade de 3 citostáticos (ciclofosfamida - CYP, micofenolato de mofetil – MMF, e ácido micofenólico – MPA), em três espécies de água doce representativas de níveis tróficos e grupos funcionais diferentes: a microalga Raphidocelis subcapitata, o rotífero Brachionus calyciflorus, e o peixe Danio rerio. Os seguintes parâmetros biológicos foram avaliados: as taxas de biomassa e de crescimento populacional para a microalga após 72 horas de exposição; a mortalidade para o rotífero após 24 horas de exposição; as taxas de mortalidade e eclosão, e percentagem de deformações morfológicas para o peixe-zebra após 96 horas de exposição. Relativamente aos ensaios com a microalga, não foi possível determinar valores para os parâmetros biológicos avaliados para os compostos MMF e MPA. Já para a CYP foi possível determinar um EC50,72h de 593.0 mg L -1 para inibição da biomassa e um EC50,72h de 1108 mg L-1 para a inibição do crescimento. Para os rotíferos, os valores de LC50,24h para o MMF e MPA não puderam ser calculados, uma vez que às concentrações mais elevadas testadas (40 e 30 mg L-1 , respetivamente – correspondendo aos limites de solubilidade dos compostos) não foi observada mortalidade. Contudo, para a CYP foi determinado um LC50,24h de 6397 mg L-1 . No geral, o MMF e o MPA provaram ser os compostos mais tóxicos nos ensaios com o peixe-zebra, com valores de LC50,96h de 0.046 e 1.410 mg L-1 , respetivamente, contra um LC50,96h de 1306 mg L-1 para a CYP. Todos os citostáticos causaram deformidades morfológicas nos embriões de peixezebra, que incluíam principalmente edemas e malformações da medula espinal. Com base nestes resultados, as concentrações sem efeito previstas (predicted no-effect concentrations - PNEC) foram derivadas para cada composto para calcular o quociente de risco (RQ), que relaciona a toxicidade com os níveis de exposição ambiental. As concentrações ambientais previstas ou medidas em águas superficiais foram adquiridas da literatura. No geral, a CYP não apresentou risco para a biota de água doce (RQ = 0.003), enquanto o MMF e MPA apresentaram valores de RQ acima de 1 (3.0 e 4.1; respetivamente), representando um elevado risco para organismos dulçaquícolas.
Mestrado em Biologia Aplicada
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(12608132), Roslyn Howse. "Biological impacts of acid mine drainage in the Dee River, downstream of the Mt Morgan Mine, Central Queensland, Australia." Thesis, 2003. https://figshare.com/articles/thesis/Biological_impacts_of_acid_mine_drainage_in_the_Dee_River_downstream_of_the_Mt_Morgan_Mine_Central_Queensland_Australia/19836388.

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Mining for gold and copper was undertaken for nearly 100 years from 1882 at Mount Morgan in Central Queensland. Re -processing of. tailings ceased in the early 1990s and no

mining has been conducted since. The legacy of the historical mining practices is an open cut (threatening to overflow) and acid mine drainage (AMD) extending for a considerable distance along the -Dee River.

The first -18 km- of the river downstream- of- the mine, to its junction with Fletcher Creek, is severely impacted with pH consistently below 3.5. Water metal concentrations are many times higher than the water quality standards for freshwater biota. For example, the filtered mean concentrations of Al and Cu at 4 sites in this section of the river were 87.3 and 6.45 mg/L, respectively. Fish, molluscs and shrimp were absent and macroinvertebrate species richness was limited to only insects in this severely impacted region. Water quality of the river improves at the junction with Fletcher Creek and downstream the water quality is only severely impacted during periods of flow following rain events.

This study examined the biological impacts downstream of the mine including the response of biota to flows in the river. Whilst previous studies had investigated spatial variations in macroinvertebrate communities this study also examined temporal variation and response to flow. The metal content of fish and mussels from the river were determined for the first time.

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Books on the topic "Freshwater biota"

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Pleshanov, A. S., A. N. Matveev, and N. M. Pronin. Biota Vitimskogo zapovednika: Struktura bioty vodnykh ėkosistem. Novosibirsk: Geo, 2006.

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Bird, G. A. Nuclide concentration factors for freshwater biota. Pinawa, Man: AECL, Whiteshell Laboratories, 1996.

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Setyadi, Gesang. Biota akuatik di perairan Mimika, Papua. Jakarta]: Freeport Indonesia, 2002.

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Adolphson, Debbie L. Habitat, biota, and sediment characteristics at selected stations in the lower Illinois River Basin, Illinois, 1996-98. Urbana, Ill: U.S. Dept. of the Interior, U.S. Geological Survey, 2001.

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Adolphson, Debbie L. Habitat, biota, and sediment characteristics at selected stations in the lower Illinois River Basin, Illinois, 1996-98. Urbana, Ill: U.S. Dept. of the Interior, U.S. Geological Survey, 2001.

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Adolphson, Debbie L. Habitat, biota, and sediment characteristics at selected stations in the lower Illinois River Basin, Illinois, 1996-98. Urbana, Ill: U.S. Dept. of the Interior, U.S. Geological Survey, 2001.

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Paul, Marsh, ed. Inland fishes of the greater Southwest: Chronicle of a vanishing biota. Tucson: University of Arizona Press, 2009.

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Adolphson, Debbie L. Habitat, biota, and sediment characteristics at selected stations in the lower Illinois River Basin, Illinois, 1996-98. Urbana, Ill: U.S. Dept. of the Interior, U.S. Geological Survey, 2001.

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Oceans, Canada Department of Fisheries and. Acidification of surface waters in eastern Canada and its relationship to aquatic biota. Ottawa: Department of Fisheries and Oceans, 1987.

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Grasso, Dennis N. Field screening of water quality, bottom sediment, and biota associated with irrigation drainage, Wind River Indian Reservation, Wyoming, 1992-93. Cheyenne, Wyo: U.S. Dept. of the Interior, U.S. Geological Survey, 1995.

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Book chapters on the topic "Freshwater biota"

1

Scherer, Christian, Annkatrin Weber, Scott Lambert, and Martin Wagner. "Interactions of Microplastics with Freshwater Biota." In The Handbook of Environmental Chemistry, 153–80. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61615-5_8.

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Potter, Ian C., Richard M. Warwick, Norm G. Hall, and James R. Tweedley. "The physico-chemical characteristics, biota and fisheries of estuaries." In Freshwater Fisheries Ecology, 48–79. Chichester, UK: John Wiley & Sons, Ltd, 2015. http://dx.doi.org/10.1002/9781118394380.ch5.

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Kelly, Martyn. "Effects of Acid Mine Drainage On The Biota." In Mining and the Freshwater Environment, 108–26. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-1359-2_8.

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Mushtaq, Nighat, Dig Vijay Singh, Rouf Ahmad Bhat, Moonisa Aslam Dervash, and Omar bin Hameed. "Freshwater Contamination: Sources and Hazards to Aquatic Biota." In Fresh Water Pollution Dynamics and Remediation, 27–50. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8277-2_3.

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Stokes, P. M., E. T. Howell, and G. Krantzberg. "Effects of Acidic Precipitation on the Biota of Freshwater Lakes." In Acidic Precipitation, 273–304. New York, NY: Springer New York, 1989. http://dx.doi.org/10.1007/978-1-4613-8899-9_8.

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Kallenbach, Emilie M. F., Elisabeth S. Rødland, Nina T. Buenaventura, and Rachel Hurley. "Microplastics in Terrestrial and Freshwater Environments." In Microplastic in the Environment: Pattern and Process, 87–130. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78627-4_4.

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AbstractIn recent years, the focus of microplastic research has begun to observe a shift from the marine towards terrestrial and freshwater environments. This is in response to a greater awareness of the predominance of land-based sources in marine microplastic contamination. In this regard, terrestrial and freshwater environments are often perceived as conduits for microplastic particles to the oceans, but this overlooks substantial and important complexities associated with these systems, as well as the need to protect these ecosystems in their own right. This chapter focuses on several critical sources and pathways deemed to be highly important for the release of microplastics to the environment. These include road-associated microplastic particles (RAMP) and emissions related to agriculture that are, thus far, under-researched. Transfers and accumulations of particles within terrestrial and freshwater systems are also reviewed, including the state of knowledge on the occurrence of microplastics in different environmental compartments (air, water, sediments, biota). Methodological constraints are addressed, with particular focus on the need for greater harmonisation along all stages of sampling, analysis, and data handling. Finally, the chapter discusses the ultimate fate of particles released to terrestrial and freshwater environments and highlights critical research gaps that should be addressed to evolve our understanding of microplastic contamination in complex and dynamic environmental systems.
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Liew, Jia Huan, Rayson B. H. Lim, Bi Wei Low, Maxine A. D. Mowe, Ting Hui Ng, Yi-wen Zeng, and Darren C. J. Yeo. "Tropical freshwater ecosystems, biota and anthropogenic activities with reference to South-East Asia." In Climate change and infectious fish diseases, 19–43. Wallingford: CABI, 2020. http://dx.doi.org/10.1079/9781789243277.0019.

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Garnier-Laplace, J., J. P. Baudin, and L. Foulquier. "Experimental study of 110mAg transfer from sediment to biota in a simplified freshwater ecosystem." In Sediment/Water Interactions, 393–406. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2783-7_34.

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Ibelings, Bas W., and Karl E. Havens. "Cyanobacterial toxins: a qualitative meta–analysis of concentrations, dosage and effects in freshwater, estuarine and marine biota." In Advances in Experimental Medicine and Biology, 675–732. New York, NY: Springer New York, 2008. http://dx.doi.org/10.1007/978-0-387-75865-7_32.

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Parsons, Meg, Karen Fisher, and Roa Petra Crease. "‘The past is always in front of us’: Locating Historical Māori Waterscapes at the Centre of Discussions of Current and Future Freshwater Management." In Decolonising Blue Spaces in the Anthropocene, 75–119. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-61071-5_3.

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AbstractThis chapter examines the historical waterscapes of Indigenous Māori iwi (tribes) and hapū (sub-tribes) in the Waipā River (Aotearoa New Zealand). We highlight some of the principles of Te Ao Māori (the Māori world) that shaped Māori understandings and engagements with their ancestral waters and lands prior to colonisation. We explore how the arrival of Europeans resulted in Māori embracing new technologies, ideas, and biota, but always situating and adapting these new imports to fit within their Indigenous ontologies and epistemologies. In contrast, British colonial officials were unwilling to embrace such cross-cultural learnings nor allow Te Ao Māori to peacefully co-existent with their own world (Te Ao Pākehā). Military invasion, war, and the confiscation of Māori land occurred, which laid the foundations for environmental injustices.
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Conference papers on the topic "Freshwater biota"

1

Margenat, Henar, Gael Le Roux, Oskar Hagelskjaer, Laure Gandois, Anna Vila-Gispert, Delfina Cornejo, Michael Butler-Margalef, Helena Guasch, and Sophia Hansson. "Microplastic and potential harmful trace elements (PHTE) as co-pollution in high-mountain freshwater biota." In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.12491.

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Reports on the topic "Freshwater biota"

1

Blaylock, B. G., M. L. Frank, and B. R. O`Neal. Methodology for estimating radiation dose rates to freshwater biota exposed to radionuclides in the environment. Office of Scientific and Technical Information (OSTI), August 1993. http://dx.doi.org/10.2172/10140212.

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Blaylock, B. G. Methodology for Estimating Radiation Dose Rates to Freshwater Biota Exposed to Radionuclides in the Environment. Office of Scientific and Technical Information (OSTI), January 1993. http://dx.doi.org/10.2172/814035.

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Tronstad, Lusha. Aquatic invertebrate monitoring at Agate Fossil Beds National Monument: 2019 data report. National Park Service, April 2022. http://dx.doi.org/10.36967/nrds-2293128.

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Monitoring ecosystems is vital to understanding trends over time and key to detecting change so that managers can address perturbations. Freshwater streams are the lifeblood of the surrounding landscape, and their health is a measure of the overall watershed integrity. Streams are the culmination of upland processes and inputs. Degradation on the landscape as well as changes to the stream itself can be detected using biota living in these ecosystems. Aquatic invertebrates are excellent indicators of ecosystem quality because they are relatively long-lived, sessile, diverse, abundant and their tolerance to perturbation differs. Aquatic invertebrates were monitored at three sites along the Niobrara River at Agate Fossil Beds National Monument in 2019 completing 23 years of data using Hester-Dendy and Hess samplers. Hess samplers are artificial multi-plate samplers suspended in the water column to allow invertebrates to colonize and Hess samples collect invertebrates in a known area on natural substrate and vegetation. We identified 45 invertebrate taxa from four phyla (Annelida, Arthropoda, Mollusca, Nematoda) using both samplers in the Niobrara River (Appendix A and B). Hester-Dendy samplers collected 4 taxa not found in Hess samples and Hess samples collected 17 taxa not collected with Hester-Dendy samplers. Hess samples captured more (91%) than Hester-Dendy samples (62%). Crustacea, Diptera and Ephemeroptera were the most abundant groups of invertebrates collected in the Niobrara River. The proportion of Insecta, Annelida, Trichoptera and Diptera differed between Hester-Dendy and Hess samples (p < 0.05). EPT richness, proportion EPT taxa and Hilsenhoff’s Biotic Index (HBI) (p < 0.0001) differed between sampler types, but taxa richness, taxa diversity and evenness (p > 0.29) did not. We collected the highest density of invertebrates at the Agate Middle site. Agate Spring Ranch had the lowest taxa richness and HBI, and the highest proportion of EPT taxa. HBI at the sites ranged from 4.0 to 6.3 (very good to fair from Hilsenhoff 1987) using the Hester-Dendy and 5.2 to 6.9 (good to fairly poor from Hilsenhoff 1987) using the Hess sampler.
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