Tropical Peatlands as Hotspots of Hidden Arcellinida Diversity: Insights from Maludam National Park, Borneo (Sarawak, Malaysia)

Arcellinida communities in Maludam National Park’s coastal tropical peatland show significantly higher species richness in zones with developed understory vegetation.

• Why it matters: Tropical peatlands’ protist diversity is largely unknown, despite Arcellinida being key predators and nutrient recyclers in other peatland climates.
• What they did: Along a hydrological transect, Arcellinida were surveyed across five vegetation-hydrological zones, with community composition characterized by Trigonopyxis-related taxa.
• The result: Diversity and community composition differed significantly among vegetation-hydrological zones, indicating vegetation-hydrological characteristics are linked to protist diversity in this Southeastern Asian peatland.

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