Light Microscopy Analysis of Algal Diversity and Abundance in the Freshwater Ecosystem of Lake Sebu, South Cotabato

Authors

Naila M. Giomna South East Asian Institute of Technology, Inc. Author
Mar Gerwin L. Bade South East Asian Institute of Technology, Inc. Author
Jayffer Ivan P. Bayona South East Asian Institute of Technology, Inc. Author
Aprille Joy F. Segunla South East Asian Institute of Technology, Inc. Author
Charmel Fretz R. Collamar South East Asian Institute of Technology, Inc. Author
Reyna Joy Pavia South East Asian Institute of Technology, Inc. Author
Jade Zaldimer L. Sambog South East Asian Institute of Technology, Inc. Author

DOI:

https://doi.org/10.5281/zenodo.19463400

Keywords:

Algae, Freshwater, Lake Sebu, Biodiversity, Abundance, Diversity Indices

Abstract

This study aimed to identify and classify algae, determine their abundance and distribution, and provide baseline data for ecological monitoring. Using a descriptive research design and light microscopy, samples were collected from four stations Falls 1, Falls 2, Lake Sebu (East), and Lake Sebu (West). Results revealed that green algae were the most dominant group, followed by filamentous green algae and diatoms. The computed indices, the Shannon (H= 0.89), Evenness (E = 0.66), and Dominance (D = 0.50) indicate moderate diversity and balanced distribution. These findings suggest that Lake Sebu supports a mesotrophic freshwater ecosystem, characterized by moderate nutrient levels and ecological stability. Overall, the study provides essential baseline data for understanding algal composition, assessing water quality and supporting the sustainable management and conservation of Lake Sebu's freshwater resources. It is recommended that future studies include seasonal sampling, consult a statistician and secure an accessible laboratory in the area to ensure timely observation, improved accuracy, and long-term monitoring of Lake Sebu’s algal diversity and ecological health.

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