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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management BIOTROPIA - The Southeast Asian Journal of Tropical Biology Indonesian Journal of Forestry Research Biosaintifika: Journal of Biology & Biology Education Forest and Society Jurnal Kehutanan Papuasia (Journal of Papuasia Forestry) Cassowary COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat Indonesian Journal of Forestry Research
Agustinus Murdjoko
Faculty of Forestry, Papua University, Manokwari, West Papua, Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Education Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Social Sciences Veterinary

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POPULATION STRUCTURES OF FOUR TREE SPECIES IN LOGGPOPULATION STRUCTURES OF FOUR TREE SPECIES IN LOGGED-OVER TROPICAL FOREST IN SOUTH PAPUA, INDONESIA: AN INTEGRAL PROJECTION MODEL APPROACH Kuswandi, Relawan; Murdjoko, Agustinus
Indonesian Journal of Forestry Research Vol 2, No 2 (2015): Indonesian Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2015.2.2.93-102

Abstract

Selective logging has been taking place in Papua for several decades. In contrast, very little is known about the stand structure in post-logged forest.  Hence, this paper investigates stand structures in logged-over area of tropical forest in South Papua. Four species were selected in three one-hectare permanent sample plots (PSPs): Vatica rassak, Syzygium sp, Litsea timoriana and Canarium asperum.  PSPs were located in the forest concession area of PT. Tunas Sawaerma in Assiki, Boven Digul, in South Papua.  Data sets comprised measurements made in 2005 and 2012 consisting of species, diameter at breast height (DBH), mortality and number of tree of each species.  Integral Projection Models (IPMs) were developed, taking into account mortality, growth, recruitment and fecundity.  Results show the pattern of stand structures of the four species were more or less similar, i.e. more individual trees were present in the small diameter classes than in the larger diameter classes.  The general pattern of the individual distribution of the four species is the typical reverse-J shape.  Syzygium sp. has a greater number of individuals in the small diameter classes than the other three species.  Population growth rates (λ) are above one, indicating that the stand structures of the population dynamics of the four species are recuperating.  Conclusively, these results suggest that species composition and population structure in these logged-over forests are recovering increasingly.
Plant Species Composition and Their Conspecific Association in Natural Tropical Rainforest, South Papua Murdjoko, Agustinus; Marsono, Djoko; Sadono, Ronggo; Hadisusanto, Suwarno
Biosaintifika: Journal of Biology & Biology Education Vol 8, No 1 (2016): March 2016
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v8i1.5217

Abstract

Papua has so many wide lowland areas that cover high diversity in plant from life-forms. In contrast, there is a lack of information concerning species diversity. The objectives of the research were to describe species of plant life-forms and described conspecific associations between small individuals and large individuals in natural tropical rainforest, south Papua. Then, 46 nested plots were placed systematically in natural tropical rainforest of Boven Digoel Regency, Papua. Density, frequency, dominance and importance value index (IVI) were analyzed to describe plant diversity, while detrended correspondence analysis (DCA) was to describe conspecific association between small individuals and large individuals. Results found 2040 individuals in this forest consisting 194 plant species. Those are from pteridophytes, angiosperms and gymnosperms. The plant life-forms are herbs, orchids, palms, pandans, shrubs, rattans, vines and trees in which of the plant life-forms, trees are the most abundant according to number of species. In the dominant plant species, two types of conspecific association occurred between small individuals and large individuals. Analysis of DCA revealed that three are large plant species grow along with their small individuals. Another type is that small individuals grow far from their large individuals.
Population Dynamics of Pometia for The Period of Post-Selective Logging in Tropical Rainforest, Southern Papua, Indonesia Murdjoko, Agustinus; Marsono, Djoko; Sadono, Ronggo; Hadisusanto, Suwarno
Biosaintifika: Journal of Biology & Biology Education Vol 8, No 3 (2016): December 2016
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/biosaintifika.v8i3.6309

Abstract

Tropical rainforest changed in term of structure, composition and population, resulting from logging. One of target trees during logging is Pometia. Our goals of this research were to answer that (1) How were survival, growth, fecundity and population growth rate (?) of Pometia within remnant stands?; (2) what were driving factors to explain population dynamics of Pometia within logged forest?. Data were derived from three hectares-permanent sample plot (PSP) in logged forest of PT Tunas Timber Lestari. Integral Projection Models (IPMs) were applied to analyze population dynamics. The study showed dynamically that probability of the individuals of Pometia survived in this area did not significantly differ among their size, while stands showed the significant difference between small and large individuals. The growth of both individuals of Pometia and stands varied significantly in different size. The probability of fecundity both Pometia and stands were significantly different among size. The population of Pometia has been increasing for about a decade as the population of all stands was growing as well. Moreover, the regular documentation of species composition and structure before and after logging is necessary as a control of biodiversity. Therefore, a proper protocol to monitor the biodiversity should be designed by government and disseminated it to logging companies. How to CiteMurdjoko, A., Marsono, D., Sadono, R. & Hadisusanto, S. (2016). Population Dynamics of Pometia for The Period of Post-Selective Logging in Tropical Rainforest, Southern Papua, Indonesia. Biosaintifika: Journal of Biology & Biology Education, 8(3), 321-330.
Species Richness and Diversity in Secondary Lowland Forest, Bintuni, Bird's Head Peninsula, West Papua, Indonesia Rumayomi, Nimrod Agustinus Andyratnah; Murdjoko, Agustinus; Ungirwalu, Antoni; Mulyadi; Benu, Nithanel Mikael Hendrik
Jurnal Manajemen Hutan Tropika Vol. 30 No. 2 (2024)
Publisher : Institut Pertanian Bogor (IPB University)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.7226/jtfm.30.2.295

Abstract

The tropical forest plays an important role in ecosystem services, yet anthropological activities have changed the ecological conditions. Thus, this research was designed to reveal the species richness and diversity in secondary forests, including lifeform alteration. The 50 perpendicular plots were placed in both forests, with 25 for each. The study revealed that the secondary forest represents a stage of ecological succession in which species richness and diversity decreased. Additionally, the composition of life forms in the secondary forest changed, with dominant herbs indicating a more dynamic vegetation due to shifting ecological conditions. Species classified as Threatened have disappeared due to human activities in the forest. However, the secondary forest has provided a habitat for certain species, including those with conservation status, such as Threatened or Extinct, to thrive and colonize. Approximately 15.7% of species exclusively thrive in secondary forests, including Antiaropsis uniflora C.C.Berg. Therefore, to promote sustainable forest management, this study suggests monitoring the species in secondary forests, particularly since the use of forests has traditionally been determined by local communities, including in restricted forest areas. Moreover, the local government could officially designate traditional forest use, thereby allowing restricted forests to be conserved as old-growth forests.
Dinamika kawasan kesatuan pengelola hutan produksi Sorong Selatan Raharjo, Syafrudin; Sinaga, Posma Pitta; Murdjoko, Agustinus
Cassowary Vol 7 No 1 (2024): Januari
Publisher : Program Pascasarjana Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/casssowary.cs.v7.i1.252

Abstract

Land cover changes continue to occur, bearing in mind that humans need resources and living space to continue to develop. Forest destruction is a form of change or dynamics of land termination, a problem in areas with extensive forest resources but high dependence on forests for people's lives. In Indonesia, KPH is the institution in charge of managing regional forests. With its forest area that is still maintained, Papua Island has many KPHs, one of which is the South Sorong KPHP. This study aims to determine the magnitude of changes in land cover, especially those that cause forest damage, such as deforestation and forest degradation, as well as other impacts caused by this damage, namely CO2 emissions. The research was conducted in the South Sorong KPHP working area from February to April 2023. This research used a descriptive method through map analysis. The results of the analysis of land cover for 2012 to 2021 show changes in land cover in forest areas causing forest damage in the form of deforestation and forest degradation. Deforestation in the last ten years reached 19,991.83ha, while the area of ​​forest degradation was 67,044.58ha. As a result of deforestation and forest degradation, forest carbon stocks are released and cause CO2 emissions. Deforestation CO2 emissions from the South Sorong KPHP area amounted to 13,418,062.28 tons of CO2, or around 70.68% of the total CO2 emissions, with an average emission of 1,341,806.23 tons of CO2/year. The highest CO2 emissions due to deforestation occurred in three periods, namely the periods 2016-2017, 2018-2019, and 2020-2021. Forest degradation contributes to CO2 emissions of 5,566,602.38 tons of CO2, or around 29.32% of the total CO2 emissions, with an average of 556,660.24 tons of CO2/year. Keywords: Land cover, forest destruction, deforestation, forest degradation, and CO2 emissions
Dinamika deforestasi dan degradasi hutan di Provinsi Papua Febi Selvandy Putri, Eka; Murdjoko, Agustinus; Raharjo, Syafrudin
Cassowary Vol 7 No 2 (2024): Juni
Publisher : Program Pascasarjana Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/casssowary.cs.v7.i2.305

Abstract

ABSTRACT: The dynamics of the change in forest cover and its impact on carbon dioxide emissions in Papua Province over the 32 years, from 1990 to 2022. The research was carried out from April to May, using secondary data consisting of land cover maps, slopes of slope, and forest function on a scale of 1:250.000 and administrative territory boundaries on a scale of 1:50.000. The analysis methods involve codification processes, map overlay, land cover change analysis, and CO2 emission calculation. Research results show that during the period, Papua Province suffered significant deforestation. Deforestation was recorded at 256.065 ha at an average rate of 8.002 ha/year, while forest degradation reached 965.955 ha with an average speed of 30.186 ha/year. Further analysis shows that Sarmi district is the region with the highest level of damage, with deforestation of 35.507 ha and forest degradation of 292.860 ha. The impact of deforestation and forest degradation on carbon dioxide emissions is also very significant. Deforestation accounts for about 174.720.433 tons of CO2, with an annual average of 5.460.014 tons of CO2/year, while forest degradation contributes about 193.584.910 tons of CO2, with an average yearly of 6.049.528 tons of CO2/year. Deforestation and forest degradation in Papua Province are complex and interrelated. The leading causes are economic, mining, and social factors. As a result, these findings suggest that the Papua Province needs better forest conservation and management measures and the development of sustainable policies to maintain the sustainability of forest ecosystems and reduce greenhouse gas emissions.
Customary Forests in West Papua: Contestation of Desires or Needs? Ungirwalu, Antoni; Awang, San Afri; Runtuboi, Yubelince Y.; Peday, Mariana Y.; Marwa, Jonni; Maitar, Bustar; Murdjoko, Agustinus; Fatem, Sepus M
Forest and Society Vol. 5 No. 2 (2021): NOVEMBER
Publisher : Forestry Faculty, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24259/fs.v5i2.13350

Abstract

The challenge of integrating ecological, economic and social aspects of forest management is still a critical issue among stakeholders who agree on community-based forestry and the rights of indigenous peoples. In West Papua, the contrast of abundant natural resources with serious social inequalities and structured poverty is a continuing challenge for implementing a social forestry program. The process of establishing customary territories in West Papua is an important milestone in recognising its community entities. Is this scheme definitively able to answer the interests of access and management of indigenous peoples? This can help in achieving the sacred goal of protecting 70% of the forest area. This paper examines the dynamics of forest management in West Papua by the parties in customary forests. The low area designated for customary territories in West Papua, which has only reached 2,554.2 hectares, and the absence of a decree on the existence of customary forests is a form of injustice to the interests of local communities. The social forestry acceleration program intended to end the uncertainty surrounding customary forests is still in process. The roles of both on-site and off-site parties have not been optimal in realising customary forests in West Papua due to the complex and incomplete translation process at the site level. The results of the review show that interest is still focused on achieving an indicative-annual figure, which is still dominated by the village forest scheme. Hopefully, this year's acceleration of customary forests will become a milestone in West Papua, based on mutual need and desire.
POLA PENGELOLAAN RUANG AREA HUTAN BERBASIS KEARIFAN LOKAL MASYARAKAT DISTRIK AYAMARU TIMUR SELATAN, KABUPATEN MAYBRAT Kambu, Jois; Marwa, Jonni; Murdjoko, Agustinus
JURNAL KEHUTANAN PAPUASIA Vol. 9 No. 2 (2023): Jurnal Kehutanan Papuasia
Publisher : Fakultas Kehutanan UNIPA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46703/jurnalpapuasia.Vol9.Iss2.500

Abstract

Pengelolaan ruang area hutan berbasis kearifan lokal terintegrasi dengan pendekatan tradisonal dari pengetahuan lokal masyarakat dalam pengelolaan hutan. Pada area kawasan hutan, terdapat beberapa hal yang mempengaruhi terjadinya kerusakan ekologis, kemiskinan dan kehancuran sistem budaya masyarakat, konflik kepentingan dan berdampak pada lingkungan yang tidak berkelanjutan. Penelitian ini bertujuan untuk mengidentifikasi pola penggunaan area dalam pengelolaan ruang hutan, peraturan dan juga adat istiadat yang dapat diterapkan untuk komunitas masyarakat adat di Timur Selatan Distrik Ayamaru, Kabupaten Maybrat. Pengambilan data terdiri dari data sekunder dan data primer. Pengambilan data primer diambil dengan cara melakukan wawancara terhadap komunitas masyarakat adat. Komunitas masyarakat adat di Timur Selatan Distrik Ayamaru, di Kabupaten Maybrat, telah mempunyai area hutan untuk eksploitasi, dengan alokasi ruang untuk area budidaya atau zona pemanfaatan, area yang dilindungi (hidrologis) dan zona ekologis khusus, atau landsekap ekologis, dan dalam bahasa daerah dikenal dengan kata area ‘Pamali’ (Mbou). Tingkat keberlanjutan untuk alokasi penggunaan ruang berbasis kearifan lokal masyarakat Maybrat di Timur Selatan Distrik Ayamaru termasuk dalam kategori keberlanjutan tinggi dengan 74% area alami menjadi area yang dilindungi atau perlindungan kawasan adat.
Analisis kondisi tegakan pada kawasan hutan perkotaan dan pengaruhnya ter-hadap iklim mikro Di Kota Manokwari Tri Apdian, Yulianto; H. S. Siburian, Rima; Murdjoko, Agustinus
Cassowary Vol 8 No 1 (2025): Januari
Publisher : Program Pascasarjana Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/casssowary.cs.v8.i1.322

Abstract

ABSTRACT: This research aims to analyze forest stand conditions that influence the microclimate in Manokwari urban forests and microclimate conditions that can provide comfort for the surrounding environment. The results of satellite imagery photos show that Manokwari city's land use is forest in the 5 year period, there has been a change in land use area, in 2017 the residential area was 1,512.34 ha to 1,714.58 Ha in 2022, there was an increase of 202.24 Ha. The temperature inside the forest area was recorded at 26.3°C, while outside the forest area it was recorded at 31.1°C. Manokwari has experienced extreme microclimate changes over the last 5 years, the temperature has increased to around 1.5°C, apart from that the humidity has also been recorded to have decreased significantly. Analysis of the comfort index shows that the forest temperature in the Amban region is lower than in other areas studied. Another important thing is that areas in the city that have stands of trees can immediately be designated as urban forests. Based on an analysis of oxygen consumption in various sectors and its population, Manokwari City requires the development of around 918.96 ha of urban forest. To maintain the continuity of the microclimate, it is necessary to immediately issue regulations by the Regional Government regarding the designation of existing areas as urban forests.
POPULATION STRUCTURES OF FOUR TREE SPECIES IN LOGGED-OVER TROPICAL FOREST IN SOUTH PAPUA, INDONESIA: AN INTEGRAL PROJECTION MODEL APPROACH kuswandi, Relawan; Murdjoko, Agustinus
Indonesian Journal of Forestry Research Vol. 2 No. 2 (2015): Indonesian Journal of Forestry Research
Publisher : Association of Indonesian Forestry and Environment Researchers and Technicians

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59465/ijfr.2015.2.2.93-101

Abstract

Selective logging has been taking place in Papua for several decades. In contrast, very little is known about the stand structure in post-logged forest. Hence, this paper investigates stand structures in logged-over area of tropical forest in South Papua. Four species were selected in three one-hectare permanent sample plots (PSPs): Vatica rassak, Syzygium sp, Litsea timoriana and Canarium asperum. PSPs were located in the forest concession area of PT. Tunas Sawaerma in Assiki, Boven Digul, in South Papua. Data sets comprised measurements made in 2005 and 2012 consisting of species, diameter at breast height (DBH), mortality and number of tree of each species. Integral Projection Models (IPMs) were developed, taking into account mortality, growth, recruitment and fecundity. Results show the pattern of stand structures of the four species were more or less similar, i.e. more individual trees were present in the small diameter classes than in the larger diameter classes. The general pattern of the individual distribution of the four species is the typical reverse-J shape. Syzygium sp. has a greater number of individuals in the small diameter classes than the other three species. Population growth rates (λ) are above one, indicating that the stand structures of the population dynamics of the four species are recuperating. Conclusively, these results suggest that species composition and population structure in these logged-over forests are recovering increasingly.
Co-Authors Agustinus Andyratnah Rumayomi, Nimrod Antoni Ungirwalu Aristone Djitmau, Dony Benu, Nithanel Mikael Hendrik Djitmau, Dony Aristone Djoko Marsono Febi Selvandy Putri, Eka H. S. Siburian, Rima Kambu, Jois Lense, Obed N. Maitar, Bustar Marwa, Jonni Mikael Hendrik Benu, Nithanel MULYADI Mulyadi Mulyadi Peday, Mariana Y. Relawan Kuswandi Ronggo Sadono Rumayomi, Nimrod Agustinus Andyratnah San Afri Awang Sepus M. Fatem Sinaga, Posma Pitta SUWARNO HADISUSANTO Syafrudin Raharjo Tri Apdian, Yulianto Tuharea, Ade Fachrianto Raipatty Yubelince Runtuboi