The aim of this research is to observe the various kinds of wooding epiphytes and its porophyte in the log over forest in the area of 12 hectares in Malinau Research Forest (MRF-CIFOR) Seturan-district of Long Loreh, the regency of Malinau. In that area, it is found nine species with 2,4 individual wooding epphytes at each phorophyte. The Hoya sp., from the family of Asplepidaceae is the most abumdauf wooding epiphytes in the crown and in the bark of the host trees.

Nusantara, Indonesia’s new capital city, experienced a rare extreme rainfall event on 27–28 August 2021. This heavy rainfall occurred in August, the driest month of the year based on the monthly climatology data, and caused severe flooding and landslides. To better understand the underlying mechanisms for such extreme precipitation events, we investigated the moisture sources and transport processes using the Lagrangian model HYSPLIT. Our findings revealed that moisture was mostly transported to Nusantara along three major routes: from Borneo Island (BRN, 53.73%), the Banda Sea and its surroundings (BSS, 32.03%), and Sulawesi Island (SUL, 9.05%). Overall, BRN and SUL were the main sources of terrestrial moisture, whereas the BSS was the main oceanic moisture source, having a lower contribution than its terrestrial counterpart. The terrestrial moisture transport from BRN was mainly driven by the large-scale high vortex flow, whereas the moisture transport from the SUL was driven by the circulation induced by boreal summer intraseasonal oscillation (BSISO) and low-frequency variability associated with La Niña. The near-surface oceanic moisture transport from BSS is primarily associated with prevailing winds due to the Australian monsoon system. These insights into moisture sources and pathways can potentially improve the accuracy of predictions of summer precipitation extremes in Indonesia’s new capital city, Nusantara, and benefit natural resource managers in the region.

Penelitian ini bertujuan untuk mengidentifikasi pohon inang epifit (porofit) pada hutan bekas tebangan setelah 6 tahun pembalakan seluas 12 hektar di Hutan Penelitian Malinau (MRF-CIFOR) pada hutan dataran rendah DAS Malinau. Pohon inang epifit di hutan bekas tebangan ditemukan 50 pohon per hektar, yang terdiri dari 162 spesies dalam 42 suku dengan 484 pohon (79.9%) berdiameter 20-51 cm. Pohon inang dari family Dipterokarpa di temukan paling banyak di hutan bekas tebangan (± 50%). Shorea parvifolia Dyer. merupakan pohon inang paling banyak ditemukan (34 pohon). Kata kunci: pohon inang epifit, Dipterokarpa, hutan bekas tebangan, hutan dataran rendah, Daerah Aliran Sungai

No abstract

Penelitian ini menggunakan metode petak tunggal dengan pengambilan data secara sensus, bertujuan untuk mengidentifikasi pohon inang ephipit pada hutan Primer dataran rendah seluas 6 hektar di kabupaten Malinau. Pohon inang ephipit di hutan Primer ditemukan 696 pohon atau 116 pohon per hektar, yang terdiri dari 179 spesies dalam 85 genus dan 39 suku dengan 417 pohon (59.9%) berdiameter 36-67 cm.  Pohon inang dari famili Dipterocarpace di temukan paling banyak di hutan Primer (± 80%) terutama dari Suku Shorea sp (42.2%), dengan Shorea parvifolia Dyer. merupakan pohon inang paling banyak ditemukan (50 pohon).