Assessment of Aquatic Macrophytes in Selected Sampling Sites in Sawaga River, Malaybalay City, Bukidnon

Abstract

Aims: The study aimed to identify the species and distribution of aquatic macrophytes found in the selected sampling sites along Sawaga River, as well as their conservation status and the corresponding implications it has on the environmental status of the river. Study Design: The study employed a descriptive research design. Place and Duration of Study: Sawaga River, Malaybalay City, Bukidnon (Casisang Site, Impalambong Site, Kalasungay Site) and Central Mindanao University Museum, Maramag, Bukidnon; January 2024 to December 2024 Methodology: The transect walk method was utilized to collect the aquatic macrophyte species in the sampling sites. Subsequently, the Shannon-Wiener Diversity Index and Margalef’s Species Richness Index were employed to determine species diversity and richness in the area. Additionally, the collected specimens underwent preservation through the use of denatured alcohol. Results: Of all the three (3) sampling sites, only three distinct aquatic macrophyte species were recorded across all sites: Cyperus alternifolius (emergent), Hydrocotyle sp. (creeping), and Pistia stratiotes (floating). The computed Shannon-Wiener Diversity Index (H’ = 1.0114) and Margalef’s Species Richness Index (D = 1.1162) across all sampling sites indicate generally low species richness. All species were classified as Least Concern (LC) by the IUCN. Conclusion: There is a limited presence of aquatic macrophytes in Sawaga River, attributed to environmental stressors such as seasonal climate variation and anthropogenic pollution. It is recommended that succeeding studies expand the number of sampling sites and consider other seasonal periods to gain a more comprehensive understanding of the ecological status of the river.