1 research outputs found
Comparison of temporal and spatial variation of periphytic algal community in two urban lakes in Umuarama-PR (Brazil)
Water resources are very important for all living organisms, and as being of vital importance need to be preserved. Thus, many water bodies are monitored as an essential strategy for identification of possible alterations over space and time.聽The analyses were performed in two different hydrological conditions, and water sample and rocks were collected in two different points at each lake. The results showed higher values of Ammoniacal Nitrogen in Aratimb贸 Lake, mainly during dry period (Ammoniacal Nitrogen = 4.2 mgL-1) at P1. However, P2 at Tucuruvi Lake presented higher concentration of Orthophosphate (2.24 mgL-1). Total Periphyton density also demonstrated variation among the different hydrological scenarios and lakes. The Highest density was of 385.30 10鲁 ind.cm-2at Aratimb贸 Lake and 180.43 10鲁 ind.cm-2at Tucuruvi Lake in rainy condition. Comparing the predominance of species, In Aratimb贸 Lake, Chlorophyceae class was predominant at P1, while Cyanophyceae class was predominant at P2. In dry period, Bacillarophyceae class was seen as the predominant class for both of lakes and for all sampling points. Differently from Aratimb贸 Lake, in Tucuruvi Lake Bacillarophyceae class was predominant in both of hydrological scenarios