Occurence of microalgae in determining organic pollution in Bailen River / by Florimel T. Amparo.

Thesis (BS Biology) Cavite State University

Includes bibliographical references.

College of Arts and Science (CAS)

AMPARO, FLORIMEL T. Occurrence of Microalgae in Determining Organic Pollution in Bailen River. Undergraduate Thesis. Bachelor of Science in Biology major in General Biology. Cavite State University, Indang Cavite. May 2017. Adviser: Prof. Ma. Veronica P. Penaflorida.
The study was conducted from January to April 2017 at Bailen River in General Emilio Aguinaldo, Cavite for the collection of samples, and physico -chemical test while the identification of microalgae was conducted at the Department of Biological Sciences. Specifically the study aimed to: 1) determine the physico-chemical parameters (pH,

temperature, total dissolved solids, dissolved oxygen) of the water samples taken from Bailen River; 2) identify the microalgae present in Bailen River; 3) determine the most abundant microalgae present in Bailen River; and 4) determine the correlation between the genus of microalgae and the physico-chemical parameters.
Various methods were used in the study such as survey and microscopy in the identification of the microalgae. The physico- chemical was done on the actual site. A handheld multimeter was used in determining the pH, temperature and total dissolved solids while the handheld DO meter was used in determining the dissolved oxygen.
Water pH value was recorded to its lower value of 6.23 at site 1 on the month of March within the range of its tolerable acidity conditions. The temperature was recorded at its maximum of 29.5 0C nearly summer where temperature was high due to low water level. The total dissolved solids fluctuated to maximum value of 268 mg/l in the month of
January due to rainfall. The high dissolved oxygen that was recorded gradually arose to
38.8mg/l in response to its photosynthetic activity.
The microalgae identified consisted of two centric, two araphid, one asymmetrical biraphid, one symmetrical biraphid, one monoraphid and one nitzschioid.
The most abundant microalgae occurred in five sampling sites of the Paliguang-Aso River Bailen, Cavite was the Cyclote/la followed by Navicula, then Chlorella, followed by Nil:chia, Synedra, Gomphonema and Cocconeis, then Oscillatoria, the least abundant among eight microalgae.
There was no occurrence of Chlorella during the month of March with lowest DI-I which resulted to a higher acidity of water. An increased amount of Cyclotella occurred on the month of February as recorded with highest temperature of 29.30C. With its highest dissolved oxygen of 38.8 mg/l, only the Gomphonema occurred on the month of March. The genus Navicula ranged to 172mg/l can tolerate the salinity behavior of water. The higher the dissolved oxygen, the lower genus Nitzchia occurred on the month of February. Oscillatoria only occurred in the month of March due to its temperate climate, As the Synedra increased its population, the dissolved oxygen parameter decreased. Due to the higher concentration of dissolved solids 268 mg/l, there was no occurence of ( 'oeconeis on the first month of the study.
There was no correlation between the microalgal genus and the physico — chemical parameters in Paliguang Aso Bailen Rivera

Submitted copy to the University Library. 08/03/2017 T-6877