Moss-associated diatoms from Malaysian montane cloud forest with a description of two new species

Abstract

Although tropical montane cloud forests (TMCFs) occupy less than half of a percent of the Earth’s land surface, they are the most species-rich and species-dense ecosystems worldwide. Despite numerous studies on various organisms in this environment, diatoms remain a group that is practically unknown. Our work focused on samples of terrestrial bryophytes collected from various substrata at a single site in the Malaysian cloud forest. Despite originating from only one site, the samples contained a high diversity of diatom species and represented a wide range in pH (3.6–6.3). In our study, 62 diatom taxa were observed (8–24 per sample), of which 19 could not be identified with certainty, and were referred to established taxa of similar morphology (as cf. or aff.). Among these however, two species are described as new on the basis of their unique valve morphology: Geissleria bryophila sp. nov. and Eunotia brinchangiana sp. nov.

Keywords:

• Bacillariophyta
• taxonomy
• bryosphere
• aerophytic conditions
• Southeast Asia
• Sundaland

Acknowledgements

The authors would like to thank the tardigradologist team from Jagiellonian University, and especially Witold Morek, for sharing the material used in the present research.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This study was supported by the ‘Regional Excellence Initiative’ for 2019–2023 funded by the Ministry of Science and Higher Education, Project No. 026/RID/2018/19 and by statutory funding from the Department of Agroecology and Forest Utilization, University of Rzeszów.