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All Journal Jurnal Riau Biologia Biosaintifika: Journal of Biology & Biology Education
OSAMU KOZAN, OSAMU
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Agriculture, Biological Sciences & Forestry

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Taksiran Akumulasi Biomassa atas Permukaan pada Eksperimen Restorasi Lahan Gambut Bekas Terbakar, Area Transisi Cagar Biosfer Giam Siak Kecil-Bukit Batu, Riau, Sumatera Indonesia GUNAWAN, HARIS; MUDIYARSO, DANIEL; MIZUNO, KOSUKE; KOZAN, OSAMU; SOFIYANTI, NERY; INDRIYANI, DIAN; SEPTIANI, DIEN; LESTARI, ISKA
Jurnal Riau Biologia Vol 1, No 1 (2016)
Publisher : Jurusan Biologi FMIPA Universitas Riau

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Abstract

The Giam Siak Kecil-Bukit Batu Biosphere Reserve was managed by zonation as a approach for multibenefitof management goals. This Bioshere Reserve has a fairly high carbon stock stored in its naturalpeat swamp forest ecosystems. Nevertheless, the condition of the peat swamp forest in the BiosphereGiam Siak Kecil-Bukit Batu currently has been destructed, especially in the buffer and transition zones.The threats of protected areas are not only coming from forest fire factors, but also from encroachmentand illegal logging. Therefore, it requires a recovery effort. This research aims to determine the survivalrate and to estimate the above ground biomass accumulation of the main tree species of peat swamp forestthat used to restore the burnt peat. The estimated total biomass accumulation on the surface was measured using allometric equations. Result of this research proved that Jelutung tree (Dyera polyphylla) has thebest survival rate among the trees (98%), while banana tree (Mezzettia parviflora) has lower survival rate( 35%). The highest total biomass accumulation was found in Jelutung (Dyera polyphylla) (499.015kg/ha/year, while the lowest total biomass accumulation was found in Meranti batu (Shorea uliginosa)(88.867 kg/ha/year). A total of nine pioneer species were identified i.e. Tenggek burung (Euodia sp),kayu ara (Ficus sp), mahang (Macaranga triloba), karet (Havea brasiliensis), sendayan (Scleriasumatrensis), alang-alang (Imperata cylindrica), senduduk (Melastoma malabathricum), paku-pakuan(Neprolepis hirsutula) and rumput teki (Cyperus rotundus). The total biomass accumulation of earlysuccession in all types of vegetation pioneer is 338,91 kg/ha.Key words: Above Ground Biomass Accumulation, restoration, vegetasion succession, burned peatland,Survival Rate.
Mangrove Conditions Using Drones Along Several Rivers in Bengkalis Island, Riau, Indonesia Eki Ria Saputra; Sri Catur Setyawatiningsih; Radith Mahatma; Kozan, Osamu
Biosaintifika: Journal of Biology & Biology Education Vol. 16 No. 3 (2024): December 2024
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v16i3.16325

Abstract

Mangroves on Bengkalis Island experienced a decline between 2000 and 2019. This decrease in mangrove forest area was caused by anthropogenic activities and natural factors, such as coastal erosion. The objective of this study is to assess the current condition of mangroves on Bengkalis Island, Riau, Indonesia. The research was conducted in March 2024 across four rivers on Bengkalis Island, with each river containing three research stations: upstream, midstream, and downstream. Data collection involved capturing aerial photos of mangroves using drones over 100 m x 100 m. The photos were analyzed using the supervised image classification method to identify and assess mangrove land cover. A total of 11 mangrove species were identified along the rivers. The most widely distributed species across all locations were Rhizophora apiculata and Xylocarpus granatum. Canopy cover at all research sites was classified as dense, with coverage exceeding 75%. This study provides crucial information about the condition of mangroves on Bengkalis Island, serving as a guideline for future restoration efforts.
Co-Authors DANIEL MUDIYARSO, DANIEL Dian Indriyani Dien Septiani Eki Ria Saputra Haris Gunawan ISKA LESTARI, ISKA KOSUKE MIZUNO, KOSUKE Nery Sofiyanti Radith Mahatma Sri Catur Setyawatiningsih