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EVALUATION OF NUTRIENT POLLUTION IN RED, BATCA DOAMNEI AND IZVORU MUNTELUI LAKES IN NEAM? COUNTY, ROMANIA
Abstract
Nutrient pollution and harmful algal blooms cause major environmental damage as well as serious human and animal health problems. Moreover, they take a toll on the economy, hurting industries and sectors that depend on clean water. High levels of nitrogen and phosphorus in water induce algae to grow faster than the lake ecosystems can handle. The increase in algae content damages the quality of lake water, food resources, and reduces the amount of oxygen needed to survive aquatic life. So-called algal blooms can severely reduce oxygen in water, leading to fish diseases and fish death. Based on analytical data (average, minimum and maximum values) obtained in each monitoring section, the surface water quality assessment has been done. Sampling was done in March, June, August and October in the three lakes situated in Neam? County, Romania (Eastern Carpathians). The trend assessment of the nitrates concentrations in surface water was also considered. The investigated indicators were: physical - temperature, chemical - pH, dissolved oxygen, total nitrogen, total phosphorus and biological numerical density, biomass and chlorophyll a. Total nitrogen and phosphorus as well as chlorophyll a were spectrophotometrically determined. The dissolved oxygen was measured with a titrimetric method using sodium thiosulfate. The evolution of phytoplankton in Red lake over time revealed a quantitative maximum of both analyzed indicators (numerical density and biomass) in October (966,500 organisms/L and 1,209 mg/L, respectively). Besides, the chlorophyll indicator also showed a peak in October (2.91 mg/L). The lowest numerical densities and biomass were reported in March in the middle lake area, both for B?tca Doamnei and Izvoru Muntelui, as a result of increased values for total suspended matter, which was negatively correlated with the phytoplankton development. The number of algal organisms and phytoplankton biomass produced were directly proportional to temperature and phosphorus concentration, but inversely proportional to the dissolved oxygen and total mineral nitrogen. As for Izvoru Muntelui Lake, the maximum biomass of phytoplankton in August confirmed the intensification of lake eutrophication. All three lakes had stable and low total phosphorus levels. As expected, A close relationship was found between the level of dissolved oxygen and the temperature of water of the investigated lakes.
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Brönmark C., Hansson L.A., The biology of lakes and ponds, Oxford University Press, 2017, pp. 247-251.
Rabalais N.N., Nitrogen in aquatic ecosystems. AMBIO: J. Human Environ., 2002, vol. 31, pp. 102-112.
Smith V.H., Schindler D.W., Eutrophication science: where do we go from here? Trends in ecology & evolution, 2009, vol. 24, pp. 201-207.
Le C., Zha Y., Li Y., Sun D., Lu H., Yin B., Eutrophication of lake waters in China: cost, causes, and control. Environmental Management, 2010, vol. 45, pp. 662-668.
Carpenter S.R., Caraco N.F., Correll D.L., Howarth R.W., Sharpley A.N., Smith V.H., Nonpoint pollution of surface waters with phosphorus and nitrogen. Ecological Applications, 1998, vol. 8, pp.559-568.
Carey R.O., Hochmuth G.J., Martinez C.J., Boyer T.H., Dukes M.D., Toor G.S., Cisar, J.L., Evaluating nutrient impacts in urban watersheds: challenges and research opportunities. Environmental Pollution, 2013, vol. 173, pp.138-149.
Bierhuizen J.F.H., Prepas E.E., Relationship between nutrients, dominant ions, and phytoplankton standing crop in prairie saline lakes. Canadian Journal of Fisheries and Aquatic Sciences, 1985, vol. 42, pp.1588-1594.
Morales-Marín L.A., Wheater, H.S., Lindenschmidt K.E., Assessment of nutrient loadings of a large multipurpose prairie reservoir. Journal of Hydrology, 2017, vol. 550, pp. 166-185.
Scavia D., Kalcic M., Muenich R.L., Read J., Aloysius N., Bertani, I., Martin, J., Multiple models guide strategies for agricultural nutrient reductions. Frontiers in Ecology and the Environment, 2017, vol. 15, pp. 126-132.
Daouda O., Bryant C.R., Analysis of power relations among actors and institutions in the process of agricultural adaptation to climate change and variability from the diffusion of innovations perspective. In Agricultural adaptation to climate change, Springer, Cham, 2016, pp. 27-51.
Hallegraeff G.M. Harmful algal blooms: a global overview. In: Manual on harmful marine microalgae (Eds. G.M. Hallegraeff, D.M. Anderson, A.D. Cembella), UNESCO 2004, pp. 25-50.
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