Studies Concerning the Dynamics of Physical, Chemical and Biological Indicators of a Fishing Pond and Enclosed in Quality Class
Abstract
Research has been to reveal the changes that take place in water chemistry related to the life of phytoplankton in a growing fishpond of carp species during 2011. Lower values ​​of temperature, in the spring 11.65±0.890C, less amount of organic matter 5.17±0.13 mgO2/l, dissolved oxygen 7.13±0.2 mg/l , oxygen saturation level of 72% indicates high percentages of diatoms 56,86% and Cyanophyceae 35.53% and lower by Chlorophyceae 13.73%. Ratio changes in summer where have it significant proportion the Chlorophyceae species: 44.71%, decreases that of the diatoms 20% and appear Euglenophyceaele (8.21%). Euglena viridis, Trachelomonas sp., that denote the beginning of accumulation of organic matter not degraded, fact resulted from the ratio of CCOMn/ dissolved oxygen lower (51%) than that received in the previous season 72%. The values ​​of physical - chemical study compared by two methods for the classification of water after Order 161/2006 and Index Water Quality, enclose water quality in both cases in mesoprobic zone and after level of water pollution as phytoplankton composition obtained by Shannon diversity index: (-1.138) in the spring (-1.685), in the summer and (-1.541) in the fall indicates a moderately polluted of water. General characterization of the water according to the method proposed by Nancy Gordon (2004) includes water quality: β mesoprobic of the Spring season after organic matter content 5.17±0.13 mgO2/l and oligo-mesoprobic tending to β after dissolved oxygen:7.13±0.2 mg/l and β to α mesosaprobic both summer and autumn seasons in terms with amount of organic matter and dissolved oxygen content of water.a) Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
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