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Mourino, C.; Basterrechea, M.; Molina, S. E.; De Zepeda, M.; De Juarez, Y. C.; Aguilar, E.; Oliva, B.; Palacios, R.; Palma, J. A.; Castellanos, P.
Direccion General de Energia Nuclear, Guatemala City (Guatemala). Funding organisation: Asociacion Cristiana de Jovenes de Guatemala (ACJ), Guatemala City (Guatemala); Direccion General de Energia Nuclear, Guatemala City (Guatemala)1993
Direccion General de Energia Nuclear, Guatemala City (Guatemala). Funding organisation: Asociacion Cristiana de Jovenes de Guatemala (ACJ), Guatemala City (Guatemala); Direccion General de Energia Nuclear, Guatemala City (Guatemala)1993
AbstractAbstract
[en] Chichoj lagoon has lost 71.6 ha in last 45 years, equivalent to 65% of its area on 1946. At the present, lagoon shows a great invasion of vegetation, with a trend to disappear if this process continues. Physicochemical data evaluation indicated an evident lymnological stress over lagoon due to minimal natural and significant anthropogenic contributions. Temperature was defined by physical factors as sunlight irradiation periods and caloric exchange with wind, promoting the mixing of its water between december and january. Dissolved oxygen concentrations were typical of euthrophic lakes, with over saturation in surface waters an anoxia below few meters depth describing a non-dependent temperature trend. The main affluent river contributions were oxygen-d efficient. pH behavior was related with dissolved oxygen, due to narrow relation between acidity and redox mechanisms in euthrophic waters. Lagoon and affluent river conductivities showed ionic materials contributions from basin (due to its variation with climatic changes), anthropogenic contributions (observed in affluent river) and metabolic activity from sediments speeded up in last portion of lagoon, draining great amounts of ionic substances through effluent river. Redox potentials indicated the trend of reductive process instead of oxidative ones in the affluent river and below 7 m depth in lagoon. Surface and Profile data evaluation suggested the presence of a point-source of contaminants and nutrients, and evidenced the metabolic activity produced over them in lagoon, expressed as a visual euthrophic condition. Next paper will describe nutrients and other water quality parameters behaviors and their interrelation with the physicochemical parameters described in this paper. 1 map, 5 tabs.(Author)
Original Title
Calidad de Agua y Nivel Trofico de la Laguna de Chichij, Alta Verapaz, Guatemala
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Ciencia y Tecnologia Nuclear; v. 1(1-2); Jul 1993 - Jun 1994; 11 p; Also available from Direccion General de Energia Nuclear
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Schönach, Paula; Nygrén, Nina A.; Tammeorg, Olga; Heikkinen, Milja; Holmroos, Heidi; Massa, Ilmo; Niemistö, Juha; Tapio, Petri; Horppila, Jukka, E-mail: paula.schonach@helsinki.fi2018
AbstractAbstract
[en] Highlights: • Present day methods deliver new knowledge about socio-ecological past of the lake. • Long term investigation reveals shifting goal setting of restoration over time. • Different, intertwined temporal scales complicate lake restoration endeavors. • Interannual weather variability influences restoration endeavors. • Prevailing understandings influence the anticipated futures of the lake. - Abstract: The history and future of the restoration efforts at the hypereutrophic southern Finnish lake, Tuusulanjärvi, are investigated. The interdisciplinary study is conducted within a modified DPSIR- framework, which allows us to both trace back and envision the future of the dynamics of the complex socio-ecological processes involved in restoration. The study covers the time period from the early 1970s up to 2030. The longitudinal study integrates environmental historical, limnological, and futures studies. The analyses reveal the multiple time scales of social and ecological processes present in long term restoration, the changing perceptions of and emphasis on restoration goals and outcomes over time, and the challenges that incidental and uncertain parameters, such as weather conditions, pose to sustainable and efficient restoration endeavors.
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S1462901116309522; Available from http://dx.doi.org/10.1016/j.envsci.2017.12.015; Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Environmental Science and Policy; ISSN 1462-9011;
; v. 81; p. 95-103

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AbstractAbstract
No abstract available
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Congress on climate change: Global risks, challenges and decisions; Copenhagen (Denmark); 10-12 Mar 2009; Available from http://dx.doi.org/10.1088/1755-1307/6/46/462012; Abstract only; Country of input: International Atomic Energy Agency (IAEA)
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IOP Conference Series: Earth and Environmental Science (EES); ISSN 1755-1315;
; v. 6(46); [1 p.]

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Dethlefsen, V.
Deutscher Fischerei-Verband e.V., Hamburg (Germany)1993
Deutscher Fischerei-Verband e.V., Hamburg (Germany)1993
AbstractAbstract
[en] During the lecture meeting of the working committee for waste water problems of the German Fishery Association, papers were presented on current problems of waste pollution and on the potential effects of climate changes on the fishing industry. (EF)
[de]
Anlaesslich der Vortragsveranstaltung des Arbeitsausschusses fuer Abwasserfragen im Deutschen Fischereiverband wurden Vortraege ueber aktuelle Probleme der Meeresverschmutzung gehalten. Es wurden auch moegliche Auswirkungen von Klimaveraenderungen auf die Fischerei analysiert. (EF)Original Title
Aktuelle Probleme der Meeresverschmutzung. Vortraege
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Source
Arbeiten des Deutschen Fischerei-Verbandes; v. 58; 1993; 72 p; Discussion meeting of Arbeitsausschuss fuer Abwasserfragen of Deutscher Fischerei-Verband e.V.: Topical problems of sea pollution; Vortragsveranstaltung des Arbeitsausschusses fuer Abwasserfragen des Deutschen Fischerei-Verbandes e.V.: Aktuelle Probleme der Meeresverschmutzung; Cuxhaven (Germany); 23 Sep 1993; ISSN 0415-6641;
; Available from TIB Hannover: ZA 4064(58)

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AbstractAbstract
[en] We investigated effects of subtle nutrient enrichment and metal pollution on different levels of biological organization (i.e. whole assemblage, population and individual) of species-rich assemblages. We used rockpools as model system, applying a multi-factorial sampling design to test hypotheses on differences between disturbed and reference locations. Results indicated that disturbed and reference locations supported similar assemblages, as well as individual fitness-related life-traits were ineffective to discriminate between the two conditions. In contrast, assemblages responded to pollution through a reduction of the abundance of sensitive species and a proliferation of tolerant species, although these alterations were detectable only once the influence of dominant taxa was down-weighed by data transformation. Present findings suggest that, contrarily to individual level variables, assemblage structure after data transformation and patterns of distribution and abundance of differently sensitive taxa would be a powerful tool to detect effects of subtle pollution on species-rich assemblages. - Highlights: • Disturbed and reference localities supported similar assemblages. • Data transformation was necessary to detect pollution effects on assemblages. • Sensitive canopy species were substituted by turf and mussels. • Fitness-related life-traits were ineffective to discriminate pollution effects. - Assemblage structure after data transformation and abundance of canopy species were the best tools to detect effects of subtle pollution
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S0269-7491(14)00160-2; Available from http://dx.doi.org/10.1016/j.envpol.2014.04.019; Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Bednova, O. V.; Kuznetsov, V. A.; Tarasova, N. P., E-mail: vakuz@inbox.ru2018
AbstractAbstract
[en] The combined use of methods of passive dosimetry of the status of atmospheric air, phytoindication, and cartographic visualization of data made it possible to elaborate and substantiate approaches to evaluation of the effect of atmospheric air contamination on the eutrophication of forest ecosystems under urban conditions.
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Copyright (c) 2018 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Doklady Earth Sciences; ISSN 1028-334X;
; v. 478(1); p. 124-128

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Emeis, Kay-Christian; Daehnke, Kirstin; Deek, Astrid; Mara, Vivian; Moebius, Juergen; Paetsch, Johannes; Schlarbaum, Tim; Serna, Alexandra
International Symposium on Isotopes in Hydrology, Marine Ecosystems, and Climate Change Studies. Presentations2011
International Symposium on Isotopes in Hydrology, Marine Ecosystems, and Climate Change Studies. Presentations2011
AbstractAbstract
No abstract available
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Source
International Atomic Energy Agency, Isotope Hydrology Section, Vienna (Austria); vp; 2011; 18 p; International Symposium on Isotopes in Hydrology, Marine Ecosystems, and Climate Change Studies; Monaco (Monaco); 27 Mar - 1 Apr 2011; IAEA-CN--186/INV006; Also available on-line: http://www-naweb.iaea.org/napc/ih/documents/other/INV006%20EMEIS%20(Presentation).pdf; PowerPoint presentation
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AbstractAbstract
[en] Effluents containing phosphorous as phosphate ions are frequently discharged in freshwater resources contributing to the eutrophication and directly interfering in the biological equilibrium. Clam shell residues and sewage sludge were combined for preparing efficient adsorbents for phosphate removal from aqueous medium. The adsorbents were characterized before and after adsorption testing, and the adsorption equilibrium and kinetics were investigated. Phosphate removal of 89 ± 1% was attained for samples prepared with 0.1 < X < 1.0, where X corresponds to sewage sludge/clam shell mass ratio. The analyses of the experimental errors indicated that the phosphorous removal followed the Elovich kinetic model, which describes adsorption in very heterogeneous surfaces. On the other hand, the best modelling was achieved using the Koble–Corrigan isotherm model, which incorporate different aspects of both Langmuir and Freundlich isotherms to represent the equilibrium data. The observed adsorption capacity (21.4 mgP g−1) are comparable or greater to that observed for other adsorbents described in the literature.
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Copyright (c) 2018 Springer Nature Switzerland AG; Country of input: International Atomic Energy Agency (IAEA)
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AbstractAbstract
[en] The high-mountain lakes of Saliencia (El Valle, La Cueva, Calabazosa and Cerveriz), in the Somiedo Natural ark (Asturias, NW Spain), have been subject to different anthropogenic pressures, including metal mining, cattle grazing, damming activities and water channelling work for hydroelectric exploitation. This paper reports the results of a recent geochemical and limnological study conducted in these lakes, for which no previous study existed in the literature. Based on depth profiles of temperature, conductivity, pH and ORP, as well as dissolved oxygen, chlorophyll-a, organic carbon, nutrient and metal concentration, we discuss the impact of anthropogenic pressure on the lakes. In the sampling period (July to September, 2014-2016), most of the lakes showed a marked stratification with vertical gradients as a result of different physical and (bio)geochemical processes. All the lakes showed a good environmental state with no apparent metal pollution. However, this set of mountain lakes is not homogeneous with regard to nutrient availability, primary productivity, or hypolimnetic oxygen deficit and a range of trophic conditions exist from oligotrophic (El Valle) to eutrophic (Calabazosa). This trend shows a good correlation with total phosphorus concentration (e.g., 10 µg/L P in El Valle vs. 35 µg/L P in Calabazosa), though erosive processes in the catchment may also have contributed to increase the oxygen consumption rate through an import of allochthonous organic matter. Higher nitrate contents seem to characterize the areas with higher grazing pressure (e.g., El Valle), though the obtained data do not allow us to establish any evident relationship between cattle activity and eutrophication.
[es]
Los lagos de alta montaña de Saliencia (El Valle, La Cueva, Calabazosa y Cerveriz), en el Parque Natural de Somiedo (Asturias), han sufrido una notable presión antrópica en tiempos recientes (minería metálica, pastoreo de ganado vacuno, actividades de represamiento y trabajos de canalización). Este trabajo presenta los resultados y principales conclusiones de un reciente estudio realizado en estos lagos, sobre los cuales no existía información previa. En base a perfiles de temperatura, conductividad, pH y ORP, así como de concentración de oxígeno disuelto, clorofila-a, carbono orgánico, nutrientes y metales disueltos, se discute el impacto de la presión antrópica sobre estos lagos. En el periodo de estudio (Julio a Septiembre, 2014-2016), estos lagos presentaron una marcada estratificación térmica y química con notables gradientes verticales como resultado de diversos procesos físicos y biogeoquímicos. Todos los lagos mostraron un buen estado ambiental sin aparente contaminación por metales. Sin embargo, este conjunto de lagos no es homogéneo en cuanto a la disponibilidad de nutrientes, productividad primaria, o déficit de oxígeno hipolimnético, existiendo un espectro de condiciones tróficas que van desde oligotróficas (El Valle) a eutróficas (Calabazosa). Esta tendencia parece estar provocada principalmente por la variabilidad del contenido en fósforo (p.ej., 10 µg/L P en El Valle frente a 35 µg/L P en Calabazosa), aunque los procesos erosivos en la cuenca también podrían estar contribuyendo a incrementar el consumo de oxígeno mediante el aporte de materia orgánica alóctona. Las zonas con mayor presencia de ganado (ej., El Valle) parecen presentar contenidos más altos en nitratos, aunque no puede establecerse una relación directa entre ganado y eutrofización.Original Title
Características hidrogeoquímicas de los lagos de Saliencia (Parque Natural de Somiedo, NO España): estado trófico y relación con diferentes presiones antrópicas
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Available from http://www.igme.es/Boletin/2019/130_2/BGM_130-2_Art-3.pdf
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AbstractAbstract
[en] It was intended to establish effects of pollution on quality of water of Rawal Lake, Islamabad. Six stations were located for collection of water. The data collected and analyzed so far indicated increasing pollution in the lake Increase in growth of hydrophytes in quite evident, leading towards process of eutrophication of the lake. (author)
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Journal of the Chemical Society of Pakistan; ISSN 0253-5106;
; v. 21(1); p. 47-49

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