Author : Mahilum, Fe L.

Summary : This study was conducted to determine the species richness and diversity of lichens in Brgy. Lake Duminagat, Malindang Range, Don Victoriano, Misamis Occidental. Specifically, it aimed to: (1) collect, classify, identify and describe the lichens; (2) determine the density, frequency and dominance of lichens; and (3) record the distribution of lichens in Brgy. Lake Duminagat. Inventory of lichens revealed the presence of 7 families 12 genera and 40 species. Of the 41 species, 21 species are foliose, 6 fruticose, and 5 are crustose. Among the lichens studied, 3 species are rare, namely: Parmelia conspora and unidentified species. These species were represented by 1 to 3 clumps only and can be found only in subplots V and VI. Subplots III and V showed high density and frequency values compared to other subplots, which may be due to the presence of more trees and decaying logs. The families Parmeliaceae, Collemataceae and Cladoniaceae dominated throughout the subplots. The top 3 species which had the highest total importance values in six subplots include Parmelia sexactilis, Leptigium tremelloides and Usnea longissima and Leptogium cochletum.