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Ten plant-based substrates, i.e., aerial leaf litter (AL), ground leaf litter (GL), twigs (TW), woody vines (WV), tree barks (BK), dried inflorescence (IF), decayed fruits (FR), and dead leaves of Pandanus (PD), epiphytic plants (EP), and tree ferns (FN), collected along the trail leading to and surrounding Bulusan Lake in Sorsogon, Philippines, were assessed for the occurrence and diversity of myxomycetes using moist-chamber cultures. The 388 moist chambers prepared in the study yielded 25 species belonging to 12 genera. The greatest number of species was recorded from barks followed by woody vines, aerial leaf litter, twigs, and dried inflorescence. Inflorescence had the highest diversity (FI = 18.60, SID = 9.78) while the lowest was observed for the dead leaves of Pandanus (FI = 4.92, SID = 3.99). We also observed high similarities in species composition between the different substrate types.

We surveyed and reported herein the assemblages and diversity of myxomycetes along forest habitats of Casaroro and Pulangbato Falls in Valencia, Negros Oriental, Philippines. Various plant-based substrates were collected randomly at three sampling points in each study area and used to prepare moist chamber cultures. From the 480 moist chambers prepared in this study, 381 were positive for myxomycetes and resulted in the identification of 34 species belonging to 15 genera. The forest areas leading to Casaroro Falls had higher taxonomic diversity than those of Pulangbato Falls. The study areas shared high similarity in species composition with 20 species in common. This study contributes to the species of myxomycetes reported in Negros Island, the third largest island in the Philippine archipelago.