Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal Biodiversitas Journal of Biological Diversity
JONNI MARWA
Faculty of Forestry, Universitas Papua. Jl. Gunung Salju, Manokwari 98314, West Papua, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Tree species diversity of Pegunungan Bintang, Papua, Indonesia as potency of wood supply AGUSTINUS MURDJOKO; DONY ARISTONE DJITMAU; ELIESER VIKTOR SIRAMI; RIMA HERLINA SETIAWATI SIBURIAN; ANTONI UNGIRWALU; ZULFIKAR MARDIYADI; JIMMY FRANS WANMA; WOLFRAM YAHYA MOFU; JONNI MARWA; CICILIA MARIA ERNA SUSANTI; MAX JONDUDAGO TOKEDE; CHRISTIAN SOLEMAN IMBURI; MEKY SAGRIM; HANS MAMBOAI; LUKAS YOWEL SONBAIT; FEBRIZA DWIRANTI; YENNY YENDRI SALOSA; JOHANA BETY PAEMBONAN; ESTIKO TRI WIRADYO; ERNI UNENOR; NITHANEL MIKAEL HENDRIK BENU; ANDI SASTRA BENNY SARAGIH
Biodiversitas Journal of Biological Diversity Vol. 22 No. 12 (2021)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d221263

Abstract

Abstract. Murdjoko A, Djitmau DA, Sirami EV, Siburian RHS, Ungirwalu A, Mardiyadi Z, Wanma JF, Mofu WY, Marwa J, Susanti CME, Tokede MJ, Imburi CS, Sagrim M, Mamboai H, Sonbait LY, Dwiranti F, Salosa YY, Paembonan JB, Wiradyo ET, Unenor E, Benu NMH, Saragih ASB. 2021. Tree species diversity of Pegunungan Bintang, Papua, Indonesia as potency of wood supply. Biodiversitas 22: 5645-5655. The tropical rainforest is a primary global concern in many aspects. Therefore, this study aimed to describe the tree diversity in Pegunungan Bintang Forest, Papua, Indonesia. There are 10 dominant species from seedlings, saplings, poles, and trees, indicating the timber production potency. This study set systematic plots in Murkim and Teiraplu Sub-districts to collect taxonomic information, diameter, and clear bole height samples. The results showed that the forest was categorized as a tropical mixed due to diverse tree species. The leading plant families included Moraceae, Myrtaceae, Euphorbiaceae, Lauraceae, and Anacardiaceae, with various seedlings, saplings, poles, and trees. The potency of timber was reflected through sample distribution using the reverse J-shaped curve, identifying the merchantable trees with larger and smaller diameters as re-established. However, timber utilization management requires silvicultural treatments using selective logging by diameter limit and logging cycle for forest sustainability.
Diversity, composition, structure and canopy cover of mangrove trees in six locations along Bintuni riverbank, Bintuni Bay, West Papua, Indonesia MARKUS SRAUN; RONI BAWOLE; JONNI MARWA; ANTON SILAS SINERY; REINARDUS LIBORIUS CABUY
Biodiversitas Journal of Biological Diversity Vol. 23 No. 11 (2022)
Publisher : Society for Indonesian Biodiversity

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/biodiv/d231137

Abstract

Abstract. Srau M, Bawole R, Marwa J, Sinery AS, Cabuy RL. 2022. Diversity, composition, structure and canopy cover of mangrove trees in six locations along Bintuni riverbank, Bintuni Bay, West Papua, Indonesia. Biodiversitas 23: 5835-5843. Mangroves provide various benefits of ecological and socio-economic aspects. Such benefits could be delivered if mangrove vegetation is in good condition, indicated by several ecological parameters. This study was conducted to investigate the diversity, composition, structure, and canopy cover of mangrove trees along Bintuni riverbank, Bintuni Bay, West Papua, Indonesia. There were six different locations representing biotic and abiotic conditions. The study only focused on the mangrove tree stage with a total of 175 plots established, of which each plot had a size of 10 × 10 m. The name of mangrove species, tree diameter, total height, and canopy cover percentage was recorded and measured. The result showed that the diversity and composition of mangrove trees varied among the six locations indicated by the importance value index (IVI) parameter. The estuary and sub-estuary areas were dominated by Rhizophora mucronata, while in the further area from the estuary toward the land, the dominant mangrove species was Avicennia sp. The highest number of mangrove trees was found in Kampung Lama 1 with 989 trees/ha (593 trees in 60 plots) with an average diameter of 18.8077 cm (SD±7.0279) and an average height of 8.9477 m (SD±2.2814). The lowest tree distribution was found in Kampung Masuhi with 940 trees/ha (94 trees in 10 plots) with an average diameter of 15.4787 m (SD±3.8205). The highest average of canopy covers was noted in the sub-river estuary with a percentage of 86.97% (SD±85) and the lowest percentage was in Kampung Masina with 59.89% (SD±124.85). Statistical analysis of variance (ANOVA) showed that there was a significant difference in terms of average tree diameter and height among the six locations with a p-value of 0.00021 < 0.05 at 95% CI. There was a strong positive correlation between tree diameter and height, as indicated by R2 of 0.69. In addition, a statistical test of analysis of variance from each location was significantly different among these six locations.
Co-Authors AGUSTINUS MURDJOKO ANDI SASTRA BENNY SARAGIH ANTON SILAS SINERY ANTONI UNGIRWALU CHRISTIAN SOLEMAN IMBURI CICILIA MARIA ERNA SUSANTI DONY ARISTONE DJITMAU ELIESER VIKTOR SIRAMI ERNI UNENOR ESTIKO TRI WIRADYO FEBRIZA DWIRANTI HANS MAMBOAI JIMMY FRANS WANMA JOHANA BETY PAEMBONAN LUKAS YOWEL SONBAIT MARKUS SRAUN MAX JONDUDAGO TOKEDE MEKY SAGRIM NITHANEL MIKAEL HENDRIK BENU REINARDUS LIBORIUS CABUY RIMA HERLINA SETIAWATI SIBURIAN RONI BAWOLE WOLFRAM YAHYA MOFU YENNY YENDRI SALOSA ZULFIKAR MARDIYADI