Dietriech Geoffrey Bengen
Marine Sciences Department, Faculty of Fisheries and Marine Sciences, Bogor Agricultural University, Bogor, Indonesia Jln. Agatis, Kampus IPB Dramaga Bogor 16680 Indonesia

Published : 12 Documents
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Carbon Stored on Seagrass Community in Marine Nature Tourism Park of Kotania Bay, Western Seram, Indonesia Wawo, Mintje; Wardiatno, Yusli; Adrianto, Luky; Bengen, Dietriech Geoffrey
JURNAL MANAJEMEN HUTAN TROPIKA Vol 20, No 1 (2014)
Publisher : Bogor Agricultural University

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Abstract

Currently, the function of seagrass community as carbon storage has been discussed in line with “blue carbon” function of  that seagrass has. Seagrass bed are a very valuable coastal ecosystem, however, seagrass bed is threatened if compared to other coastal ecosystems, such as mangroves and coral reefs.  The threatened seagrass experienced also contributes to its capacity in absorbing CO2 emission from greenhouse gasses such as CO2 emission Temporal estimation  shows that CO2 emission will increase in the coming decade. On the other side, efforts to decrease climate change  can be influenced  by the  existence of seagrass.  Informations about existence of seagrass as carbon storage are still very rare or limited. This study was aimed to estimate carbon storage on seagrass community  in Marine Nature Tourism Park of Kotania Bay Area, Western  Seram,  Maluku Province. The  quadrat transect method of 0.25 m2 for each plot was used to collect seagrass existence. The content of carbon in the sample of dry biomass of seagrass was analyzed in the laboratory using Walkley & Black method. The results  showed that total carbon stored was higher in both Osi and Burung Islands of Kotania Bay  than other studied areas (Buntal and  Tatumbu Islands, Marsegu Island, Barnusang Peninsula, Loupessy and  Tamanjaya Village).    The average  carbon stored in  Kotania Bay waters was 2.385 Mg C ha-1,  whereas the total of carbon stored was 2054.4967 Mg C. Keywords: biomass, seagrass, blue carbon, carbon stock
SPATIAL PROJECTION OF LAND USE AND ITS CONNECTION WITH URBAN ECOLOGY SPATIAL PLANNING IN THE COASTAL CITY, CASE STUDY IN MAKASSAR CITY, INDONESIA Amri, Syahrial Nur; Adrianto, Luky; Bengen, Dietriech Geoffrey
International Journal of Remote Sensing and Earth Sciences (IJReSES) Vol 14, No 2 (2017)
Publisher : National Institute of Aeronautics and Space of Indonesia (LAPAN)

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The arrangement of coastal ecological space in the coastal city area aims to ensure the sustainability of the system, the availability of local natural resources, environmental health and the presence of the coastal ecosystems. The lack of discipline in the supervision and implementation of spatial regulations resulted in inconsistencies between urban spatial planning and land use facts. This study aims to see the inconsistency between spatial planning of the city with the real conditions in the field so it can be used as an evaluation material to optimize the planning of the urban space in the future. This study used satellite image interpretation, spatial analysis, and projection analysis using markov cellular automata, as well as consistency evaluation for spatial planning policy. The results show that there has been a significant increase of open spaces during 2001-2015 and physical development was relatively spreading irregularly and indicated the urban sprawl phenomenon. There has been an open area deficits for the green open space in 2015-2031, such as integrated maritime, ports, and warehousing zones. Several islands in Makassar City are predicted to have their built-up areas decreased, especially in Lanjukang Island, Langkai Island, Kodingareng Lompo Island, Bone Tambung Island, Kodingareng Keke Island and Samalona Island. Meanwhile, the increase of the built up area is predicted to occur in Lumu Island, Barrang Caddi Island, Barrang Lompo Island, Lae-lae Island, and Kayangan Island. The land cover is caused by the human activities. Many land conversions do not comply with the provision of percentage of green open space allocation in the integrated strategic areas, established in the spatial plan. Thus, have the potential of conflict in the spatial plan of marine and small islands in Makassar City.
Perencanaan Kawasan untuk Pengembangan Ekowisata Perairan di Teluk Weda Maluku Utara Djamhur, Martini; Mennofatria, Boer; Bengen, Dietriech Geoffrey; Fachrudin, Achmad
TATALOKA Vol 16, No 2 (2014): Volume 16 Number 2, May 2014
Publisher : Universitas Diponegoro

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Weda Bay is a bay area which several resources likes renewable resources and unrenewable resources. This condition makes to develop Weda Bay as potential area, need zonation to arrange and make sustainable development. Water ecotourism as sustainable development  is one of activity which can combine ecology and economic aspect. Based on this fact to development water ecotourism in Weda Bay, need to estimating suitablity area. Referring to Yulianda et. al (2010), suitabilty analysis for water ecotourism has done.Result showed Weda bay has suitable area for diving tourism as 488,8427 Ha; snorkeling tourism as 551,3737 Ha; beach tourism as 151,1329 Ha; mangrove tourism as 620,1251 Ha and seaweed tourism as 32,1399 Ha.Weda Bay is a bay area which several resources likes renewable resources and unrenewable resources. This condition makes to develop Weda Bay as potential area, need zonation to arrange and make sustainable development. Water ecotourism as sustainable development  is one of activity which can combine ecology and economic aspect. Based on this fact to development water ecotourism in Weda Bay, need to estimating suitablity area. Referring to Yulianda et. al (2010), suitabilty analysis for water ecotourism has done.Result showed Weda bay has suitable area for diving tourism as 488,8427 Ha; snorkeling tourism as 551,3737 Ha; beach tourism as 151,1329 Ha; mangrove tourism as 620,1251 Ha and seaweed tourism as 32,1399 Ha.
Carbon Stored on Seagrass Community in Marine Nature Tourism Park of Kotania Bay, Western Seram, Indonesia Wawo, Mintje; Wardiatno, Yusli; Adrianto, Luky; Bengen, Dietriech Geoffrey
Jurnal Manajemen Hutan Tropika Vol 20, No 1 (2014)
Publisher : Institut Pertanian Bogor (IPB University)

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Abstract

Currently, the function of seagrass community as carbon storage has been discussed in line with ?blue carbon? function of? that seagrass has. Seagrass bed are a very valuable coastal ecosystem, however, seagrass bed is threatened if compared to other coastal ecosystems, such as mangroves and coral reefs.? The threatened seagrass experienced also contributes to its capacity in absorbing CO2 emission from greenhouse gasses such as CO2 emission Temporal estimation? shows that CO2 emission will increase in the coming decade. On the other side, efforts to decrease climate change? can be influenced? by the? existence of seagrass.? Informations about existence of seagrass as carbon storage are still very rare or limited. This study was aimed to estimate carbon storage on seagrass community? in Marine Nature Tourism Park of Kotania Bay Area, Western? Seram,? Maluku Province. The? quadrat transect method of 0.25 m2 for each plot was used to collect seagrass existence. The content of carbon in the sample of dry biomass of seagrass was analyzed in the laboratory using Walkley & Black method. The results? showed that total carbon stored was higher in both Osi and Burung Islands of Kotania Bay? than other studied areas (Buntal and? Tatumbu Islands, Marsegu Island, Barnusang Peninsula, Loupessy and? Tamanjaya Village).??? The average? carbon stored in? Kotania Bay waters was 2.385 Mg C ha-1,? whereas the total of carbon stored was 2054.4967 Mg C.
The Distribution and Abundance of Black Band Disease and White Syndrome in Kepulauan Seribu, Indonesia Johan, Ofri; Bengen, Dietriech Geoffrey; Zamani, Neviaty Putri; Suharsono, .; Sweet, Michael John
HAYATI Journal of Biosciences Vol 22, No 3 (2015): July 2015
Publisher : Bogor Agricultural University, Indonesia

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Coral diseases that have emerged since the early 1970s have caused significant regional ecological impacts. However, there has been a paucity of research into coral disease in South-East Asia, including Indonesia. This study provides baseline coral disease data in the Kepulauan Seribu Marine National Park. In this study we show a positive correlation between overall coral cover and the dominant reef building coral Montipora spp. and found two main diseases, black band disease (BBD) and WS, were highly prevalent throughout all reefs. Based on spatial location, the highest abundance of BBD (0.08 col./m2) was found at sites nearer (zone 1) to the mainland, whilst for WS (0.05 col./m2) highest abundance was found at middle sites (zone 2). According to the temporal data, the highest abundance of BBD (0.77 col./m2) was found during the transition period (between wet and dry seasons), whereas for WS higher abundance occurred within the dry season (0.07 col./m2). There was a significant difference in disease abundance among seasons which was correlated with increasing temperature and light intensity along with variations in total organic matters, nitrite and phosphate levels. Moreover, the middle sites experienced additional stress from the waste material originating from the mainland.
Harmful Algal in Banyuasin Coastal Waters, South Sumatera Aryawati, Riris; Bengen, Dietriech Geoffrey; Prartono, Tri; Zulkifli, Hilda
Biosaintifika: Journal of Biology & Biology Education Vol 8, No 2 (2016): September 2016
Publisher : Department of Biology, Faculty of Mathematics and Sciences, Semarang State University . Ro

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Phytoplankton have important as food-chain major component and primary production of marine environment. However, high abundance of phytoplankton could give harmful effects toward water ecosystem. Moreover, they could produce toxic substances that will be accumulated within their consumer. This accumulation could be dangerous for human or animals.This research were aimed to determine and calculatespecies of harmful algae in Banyuasin coastal waters. The study was conducted on April, June, August, October and December of 2013, and in February 2014, at ten stations. Phytoplankton samples were taken vertically using plankton nets. In the form of cone-shaped with a diameter of 30 cm, length 100 cm and mesh size 30 ?m.The result showed that there are 35 genera of phytoplankton. That have been found and consisted of four groups; Bacillariophyceae, Dinophyceae, Cyanophyceae and Chlorophyceae. 13 species were identified as Harmful Algal (Chaetoceros, Coscinodiscus, Nitzschia, Skeletonema, Thalassiosira, Alexandrium, Ceratium, Dinophysis, Noctiluca, Protoperidinium, Prorocentrum, Anabaena dan Oscillatoria), with seven of them were known for having toxin (Nitzschia, Alexandrium, Dinophysis, Protoperidinium Prorocentrum, Anabaena and Oscillatoria). Monitoring result showed that the highest number of species of potential harmful algal blooms (HABs) occured in June and the highest abundance occured in August, especially Chaetoceros and Skeletonema.How to CiteAryawati, R., Bengen, D. G., Prartono, T., & Zulkifli, H. (2016). Harmful Algal in Banyuasin Coastal Waters, South Sumatera. Biosaintifika: Journal of Biology & Biology Education, 8(2), 231-239.
MICROBIAL COMMUNITY OF BLACK BAND DISEASE ON INFECTION, HEALTHY, AND DEAD PART OF SCLERACTINIAN Montipora sp. COLONY AT SERIBU ISLANDS, INDONESIA Johan, Ofri; Bengen, Dietriech Geoffrey; Zamani, Neviaty Putri; Suharsono, Suharsono; Smith, David; Lusiastuti, Angela Mariana; Sweet, Michael
Indonesian Aquaculture Journal Vol 9, No 2 (2014): (December 2014)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

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It is crucial to understand the microbial community associated with the host when attempting to discern the pathogen responsible for disease outbreaks in scleractinian corals. This study determines changes in the bacterial community associated with Montipora sp. in response to black band disease in Indonesian waters. Healthy, diseased, and dead Montipora sp. (n = 3 for each sample type per location) were collected from three different locations (Pari Island, Pramuka Island, and Peteloran Island). DGGE (Denaturing Gradient Gel Electrophoresis) was carried out to identify the bacterial community associated with each sample type and histological analysis was conducted to identify pathogens associated with specific tissues. Various Desulfovibrio species were found as novelty to be associated with infection samples, including Desulfovibrio desulfuricans, Desulfovibrio magneticus, and Desulfovibrio gigas, Bacillus benzoevorans, Bacillus farraginis in genus which previously associated with pathogenicity in corals. Various bacterial species associated with uninfected corals were lost in diseased and dead samples. Unlike healthy samples, coral tissues such as the epidermis, endodermis, zooxanthellae were not present on dead samples under histological observation. Liberated zooxanthellae and cyanobacteria were found in black band diseased Montipora sp. samples.
Socio-Ecological System within Governance of Marine Protected Area: Case from Cenderawasih Bay National Park, Indonesia Bawole, Roni; Yulianda, Fredinan; Bengen, Dietriech Geoffrey; Fahrudin, Achmad; Mudjirahayu, Mudjirahayu
Jurnal Manajemen Hutan Tropika Vol 21, No 1 (2015)
Publisher : Institut Pertanian Bogor (IPB University)

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Overcoming the problem of resource management which relies only on social dimension without understanding the ecosystem dynamics will not be sufficient to create sustainable management. Therefore, socio-ecological system (SES) is needed to respond changes so that robust management could be created. Research on SES was focused more on capacity of governance in creating management of conservation area, particularly in the period where there were occurrence of resistance between social problem and ecosystem. Principal component analysis explained 76% of the total variability. Very high variable respond category occurred on first principal component (PC) with positive effect which was related directly to ecological condition, and negative effect toward catch yield and utilization of traditional zone. Condition of economy and fish resources contributed positively toward second PC, and can be expressed as factor which affected economic condition of fishermen household. Condition of fishermen, related with catching activity and income of fishermen household gave positive effect toward the third PC, and can be expressed as component which affected catching effort and explained exploitation level by fishermen toward resources. Interaction between factors which formed SES occurred due to economic activity of fishermen household, catching efforts, and ecological capacity. Design of governance could be conducted on increase of fishermen household economy through control of catching efforts and considering the carrying capacity and ecological capacity.
SPATIAL VARIATION IN POPULATION CHARACTERISTICS OF VENUS CLAM GAFRARIUM TUMIDUM RÖDING, 1798 (BIVALVIA: VENERIDAE) IN AMBON BAY, MALUKU Islami, Muhammad Masrur; Bengen, Dietriech Geoffrey; Dody, Safar
Marine Research in Indonesia Vol 43, No 2 (2018)
Publisher : Research Center for Oceanography - Indonesian Institute of Sciences (LIPI)

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Ambon Bay consists of two regions i.e. Inner and Outer Ambon Bay that was separated by Galala-Poka sill. Consequently these waters have different local environmental conditions that leads to the bivalve populations differences, one of them is venus clam Gafrarium tumidum. In this study, the distribution and spatial variation in population characteristics of of venus clam was quantified based on the analysis of their twelve shell dimensions from different populations. Fieldwork and analyses were conducted on April – Juni 2013. Total of 585 individuals of venus clam were found and could be divided into ten size-classes and three size categories i.e. small (< 23.11 mm), medium (23.12–32.05 mm) and large size (> 32.06 mm). The highest size-class density was found at medium size. Spatial distribution was related to the characteristics of sediment and other potential factors. Result of discriminant analysis showed that shell-width (SW) was the variable with the highest discriminating power and distinguishing between Inner and Outer Ambon Bay populations.
Distribution Of Batillaria Zonalis (Mollusca : Gastropoda) on Avicennia Marina (Forsk.) Vierh In The Coast Of Banggi, Rembang, Central Java Ariyanto, Dafit Ariyanto; Bengen, Dietriech Geoffrey; Prartono, Tri; Wardiatno, Yusli
Journal Omni-Akuatika Vol 14, No 3 (2018): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

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Mangroves prove a habitat for Batillaria zonalis as nursery ground, feeding ground and reproductive ground. This research was conducted from September 2016 - August 2017 and to determine the spasial and temporal pattern  with based on mangrove zone  and environmental characteristics. The gastropods and environmental characteristics were analyzed using Principal Component Analysis (PCA). The results showed that significant changes in gastropod assemblages were primarily due to changes in the water quality and season. Correlation between gastropod and physico-chemical parameters in A. marina  revealed significant relationship with gastropod B. zonalis distribution.