August Daulat

EDUCATION

Ph.D Candidate, Charles Sturt University

Master of Environmental Science, The University of Western Australia

Bachelor of Applied Science, Jakarta Fisheries University

RESEARCH, TEACHING, or OTHER INTERESTS

Environmental Science, Nature and Landscape Conservation, Management, Monitoring, Policy and Law

Scopus Publications

Temporal variability on Seagrass Cover and Species Composition in a Tourism Hotspot: a case study in Derawan Island
Mariska Astrid Kusumaningtyas, Andi Zulfikar, Agustin Rustam, Hadiwijaya L. Salim, Yusmiana P. Rahayu, August Daulat, Devi Dwiyanti Suryono, Restu Nur Afi Ati, Nasir Sudirman, Khairunnisa Khairunnisa,et al.
EDP Sciences
Seagrass ecosystems in Derawan Island provide crucial services to coastal communities, including serving as a food source for sea turtles. However, like many coastal areas, seagrass ecosystem in Derawan Island faces significant challenges. One major issue is related to tourism, which affects seagrass both through land use changes for tourism development and through various tourism activities. This study aims to assess the resilience of the seagrass ecosystem on Derawan Island by examining temporal variability in seagrass cover and community structure. Permanent plots were established to monitor changes in seagrass cover and community composition. The observations were conducted following the SeagrassWatch method. Data were collected three times, in September 2018, March 2019, and August 2019. Seagrass cover during 3 times monitoring showed fluctuate trend (averaging 42.3%, 33.2%, and 32.3%, respectively). Pioneer species such as H. pinifolia dominated the seagrass meadow, maintaining a consistently higher cover compared to other species. Conversely, the species T. hemprichii was observed at lower levels, likely due to overgrazing by sea turtles, which may have prevented its recovery. This study provides valuable insights into the status and resilience of seagrass ecosystems in a tourism hotspot and offers information that could be useful for managing seagrass ecosystem on Derawan Island.


Biomass carbon stocks in conserved and rehabilitated mangroves of Indonesia: case studies from Biduk-Biduk, Karimunjawa, Pati and Indramayu
Restu Nur Afi Ati, Khairunnisa Khairunnisa, Yusmiana P. Rahayu, Mariska A. Kusumaningtyas, Agustin Rustam, Devi D. Suryono, Hadiwijaya L. Salim, Nasir Sudirman, August Daulat, Dini Purbani,et al.
EDP Sciences
Mangroves could potentially contribute to global climate change adaptation and mitigation by absorbing carbon with large amounts and storing it in the sediment and biomass for a long time. The purpose of this study is to estimate the potential stock of carbon and sequestration in conserved and rehabilitated mangroves. It was conducted at four locations including Biduk-Biduk, Karimunjawa, Pati, and Indramayu. The allometric equations method was used to calculate the potency of carbon stock and sequestration in the mangrove. Results show that mangroves in conservation areas have higher carbon stock and sequestration than mangroves in rehabilitated areas. Mangrove in Karimunjawa has higher diversity but the total carbon stock are lower than Biduk- biduk which has total carbon storage of 1,266,997.73 Mg C which potentially absorb 4.65 t CO2e. Total carbon stock in Pati and Indramayu (rehabilitated mangroves) ranged from 2,878.31 to 43,885.63 Mg C which potentially absorb 0.01 to 0.16 t CO2e. Regression analysis showed a positive correlation between mangrove density and carbon stock in conserved and rehabilitated mangroves. The results show that conserved mangroves are more effective in absorbing and storing carbon than rehabilitated mangroves. Monitoring of rehabilitated mangroves is important to maintain and enhance carbon absorption and storage.


Assessment of a small island’s groundwater resilience under the pressure of anthropogenic and natural stresses on Tunda Island, Indonesia
T. Solihuddin, J. Prihantono, A. Daulat, R. Bramawanto, J. Risandi, T. L. Kepel, A. Heriati, and E. Mustikasari
Springer Science and Business Media LLC



Maritime Culture of Bantik Ethnic Group From North Sulawesi, Indonesia
Terry Kepel, Maya Warouw, Nani Undap, Steven Sumolang, August Daulat, and Fanny Tondo
Shima Publishing
Indonesia is well known as an archipelagic country on the equator with a huge population and diverse cultures where up to 70% of its area constitutes a maritime continent. This study investigates the maritime culture of Indonesia, a nation comprising 16,771 islands, 1,331 ethnicities, and 4,735 coastal villages, with a particular focus on the Bantik Ethnic Group in North Sulawesi Province. The primary objective of this study is to identify and document maritime cultural elements and local knowledge of the Bantik group, alongside assessing their past and current status. Employing a descriptive analysis through thematic coding of data collected via focus group discussions (FGD), in-depth interviews, field observations, and document analysis, the study reveals that the Bantik has a rich maritime culture rooted in agrarian coastal life and historical ocean connections. However, urbanization poses significant threats to their traditional practices and language, while rural Bantik communities remain largely unaffected by these changes. This research underscores the importance of preserving the Bantik's intrinsic cultural values amidst modern challenges.


Changes in Seagrass Community Structure in Response to Sediment Load and Excess Nutrients, and its implication to Carbon Stocks in the Berau Marine Conservation Area
Agustin Rustam, Mariska Astrid Kusumaningtyas, Hadiwijaya L. Salim, Devi Dwiyanti Suryono, Restu Nur Afi Ati, Nasir Sudirman, August Daulat, Terry L. Kepel, Yusmiana P. Rahayu, Dini Purbani,et al.
Wydawnictwo Naukowe Gabriel Borowski (WNGB)
As the urgency to reduce carbon emission increases, seagrass ecosystems have recently received attention due to their capacity to take up and store high amounts of carbon. Protection of this ecosystem is key to increase resilience to climate change. However, in some of the Marine Protected Areas (MPAs), seagrass ecosystems are still under threat. This study aims to investigate the current condition of seagrass ecosystems and compare it to the previous study before MPA was established in the Berau coastal water. SeagrassWatch method was used to measure seagrass community structure. Other proxies were also used to explain factors affecting seagrass condition such as total suspended solid (TSS) and sedimentary stable isotopes to identify the source of organic carbon. The percentage cover of seagrass in this study were categorized as not healthy (<29–59.9%), which was statistically related to TSS. The higher TSS resulted in the lower seagrass cover, as observed in the Rabu Rabu island located adjacent to mainland. Changes in seagrass composition were observed, including the emergence of larger species of E. acoroides and T. hemprichii in the islands located adjacent to mainland. The spatial and temporal changes of seagrass ecosystems observed in Berau MPA should be taken into consideration that conservation on seagrass ecosystems needs to be prioritized by improving the MPA function to avoid further loss of carbon from seagrass ecosystems.


Coastal Hazards in the Sunda Strait: Mitigation Strategy and Coastal Management
A Heriati, E Mustikasari, T Solihuddin, H L Salim, A Daulat, and D Purbani
IOP Publishing
Abstract Sunda strait is one of the strategic waters in Indonesia situated at the Indonesian archipelagic sea lane passage. The water is also known as one of the national strategic regions as governed in the Presidential Decree of 32/2019 about marine spatial planning. The coasts of the region have been developed as industrial areas, marine tourism and associated facilities, fisheries, agriculture, mining, etc. Despite the huge economic potency, Sunda Strait has high coastal hazards due to volcanic and tectonic activities. The Krakatau volcanic eruption in 1883 generated a tsunami run-up to ∼35 m high causing catastrophic damage along the coasts of Banten and Lampung and more than 36.000 people were reported killed. More recently, the eruption and flank collapse of the Anak Krakatau volcano generated a tsunami in the Sunda Strait causing severe damage, extensive inundation, and more than 430 deaths. Likewise, the Sunda Strait has a high potency of tsunami impacts generated by the earthquake sourced from the subduction zone known as megathrust. These conditions must become a valued lesson learned to all of us to raise awareness and preparedness through mitigation-based disaster management. Thus, we can reduce the impacts of the disaster and the high investment for post-disaster rehabilitation and reconstruction.


Sedimentary seagrass carbon stock and sources of organic carbon across contrasting seagrass meadows in Indonesia
Yusmiana P. Rahayu, Mariska A. Kusumaningtyas, August Daulat, Agustin Rustam, Devi D. Suryono, Hadiwijaya L. Salim, Restu N. A. Ati, Nasir Sudirman, Terry L. Kepel, Andreas A. Hutahaean,et al.
Springer Science and Business Media LLC
AbstractSeagrass meadows are an important component of coastal ecosystems globally, and they capture and store organic carbon in living biomass and sediments. Geographical estimates of blue carbon in seagrass habitats are regionally biased, with limited information from the Indo-Pacific region, including Indonesia. Seagrass extent in Indonesia is declining rapidly, and it has been suggested that marine protected areas (MPAs) are an important instrument to support protection of seagrass ecosystems and their services. Thus, this study is aimed at quantifying and comparing sedimentary carbon stocks and sources of organic carbon from seagrass meadows located in undisturbed areas outside MPA, disturbed areas outside MPA, and within MPA in three small islands in Indonesia. The sediment carbon stocks from this study ranged from 19.81 to 117.49 Mg C ha−1, with the highest stock measured inside MPA (77.15 ± 1.38 Mg C ha−1), followed by undisturbed outside MPA (36.08 Mg C ha−1), and the lowest stock at disturbed outside MPA (21.86 ± 0.31 Mg C ha−1). The predominant source of organic carbon in disturbed meadows was from coastal POM (particulate organic matter, ~ 36%), while in MPA and undisturbed sites, the main source was from seagrass, with ~ 38% and ~ 60% contributions, respectively. The results of this study add more data and information on seagrass blue carbon potential from three different islands with different degrees of disturbance in Indonesia.


Aboveground carbon stock of marine mangroves in Kepulauan Seribu Islands
M A Kusumaningtyas, T L Kepel, R N A Ati, H L Salim, A Rustam, D D Suryono, A Daulat, N Sudirman, Y P Rahayu, and A A Hutahaean
IOP Publishing
Abstract Mangroves, as one of the important blue carbon ecosystems, store large amounts of organic carbon. In the last decades, carbon stock assessment in mangrove ecosystems has been increased intensely following international agreements targeted at reducing global carbon emission. Many studies have investigated carbon stock potential in mangrove ecosystems, however, little is known about carbon stocks of mangroves growing in carbonate setting in small islands. These marine mangroves usually receive little or no terrestrial input, thus may have limited nutrient availability to support their growth. Meanwhile, their contribution to a global carbon inventory cannot be neglected. Here, we assessed biomass carbon stock of marine mangroves in Kepulauan Seribu, Jakarta, by using published allometric equations. Data collection was conducted in seven small islands; Burung Island, Kongsi Island, Pari Island, Lancang Besar Island, Lancang Kecil Island, Pramuka Island, and Rambut Island. The total average aboveground carbon stock was 46.68 Mg C ha−1, with Rhizopora sp. as the dominant species. The highest carbon stock was measured in Pari Island (72.1 ± 30.4 C ha−1), followed by Lancang Kecil Island (62.4 ± 38.6 Mg C ha−1), Kongsi Island (54.1 ± 27.0 Mg C ha−1), Rambut Island (52.1 ± 21.6 Mg C ha-1), Burung Island (47.9 ± 21.0 Mg C ha−1), Lancang Besar Island (31.3 ± 13.8 Mg C ha−1), and the lowest was in Pramuka Island (6.8 ± 4.8 Mg C ha-1). Mangrove aboveground carbon in these islands were comparable to those in other areas. Having thousands of small islands, Indonesia thus has a significant contribution to global climate change mitigation.


Water Security In Tunda Island, Banten Indonesia: Potency &amp; Threat
Terry Louise Kepel, Tubagus Solihuddin, Johan Risandi, August Daulat, Aida Heriati, Eva Mustikasari, Mardiany, and Sun-Kee Hong
Shima Publishing
Water availability and management for water security on small islands are critical. The purpose of this research is to uncover the water resources issue at a small island community level as well as discourse on the potential threats and sustainable management for water security. Tunda Island, located in the Java Sea, is one of 81 small islands in Banten Province, Indonesia. Data were collected through focus group discussions, open interviews with key persons, direct field observations, and secondary data gathering. Moreover, we analyzed time series climate data, particularly rainfall and population growth projections, based on data from official Indonesian government sites. The monthly mean precipitation is ranging from a low of 48 mm/month in August to a high of 292 mm/month in January. A “surplus of water” occurs from November to May, while months with a “deficit of water” occur from June to October. The majority of the community is unaware of the water security issue due to a lack of information and knowledge in the community. Some threats to the sustainability of water resources would be caused by two factors, both anthropogenical and natural: rising water demand, diminishing groundwater reserves due to population growth and tourism activities on the island, drought, sea level rise, and seawater intrusion as climate-related impacts due to increasing population growth and tourism activities on the island and drought, sea level rise and seawater intrusion as climate-related impacts. Developing community knowledge and awareness of water security is the main issue that should be handled first, coinciding with sustainable management practices that consider water use efficiency, the use of alternative water sources (e.g., rainwater harvesting), and protecting and restoring coastal ecosystems, especially for the future tourist destination.


Preliminary Study to Estimate the Potential Input of Solid Waste to the Area of Fishing Port, Case Study: Karangantu Fishing Port
H L Salim, N Sudirman, R N A Ati, T L Kepel, A Daulat, M A Kusumaningtyas, N R Prasetiawan, S M Permana, A Setiawan, W S. Pranowo,et al.
IOP Publishing
Abstract The fishing port is an important supporting facility for achieving high-quality of fishery production. Maintaining the quality of fishery products is needed by optimizing the function of fishing ports as they are the cutting edge and a prime mover in the management and utilization of fish resources and port environment, ranging from preproduction, production, processing, and marketing. On the other hand, the fishing port has various environmental problems such as waste management, water quality degradation and liquid waste management. The objective of this study is to identify the solid waste input to a fishing port by using remote sensing approach. The research was conducted in Karangantu Fishing Port (Pelabuhan Perikanan Nusantara Karangantu), located in Serang, Banten. This study shows that the high-resolution satellite imagery was proven to be able to estimate the solid waste input to the fishing port area. The result shows that solid waste input to Karangantu Fishing Port was estimated to be 142.95 tons in 2020, which was derived from office activities, shipping activities, and tourist activities surrounding fishing port area. The method approach from this study is expected to support environmental management in the other fishing port areas.


Preliminary Study of Marine Debris Composition from Fisherman Activities : A Case Study on Cikidang Fishing Port, Pangandaran
N R Prasetiawan, N Sudirman, H L Salim, R N A Ati, T L Kepel, A Daulat, M A Kusumaningtyas, S M Permana, A Setiawan, W S Pranowo,et al.
IOP Publishing
Abstract Marine debris pollution has become an important issue in recent years. It has an impact on marine environment and marine life, as well as effecting human health. The objective of this study was to identify the composition of waste that was produced from the fishermen’s activities. The research was conducted in Cikidang Fishing Port, Pangandaran. The data of waste types from fishing vessel were grouped based on the vessel’s dimension. The result show that plastics dominated the waste composition, and based on the vessel dimension when compared the amount of waste generated, the amount of waste from one day fishing (small vessel) was greater than the ten days fishing (big vessel). The amount of waste generated from small vessel was 0.009 tons-1.vessel-1.year-1, meanwhile from big vessel was 0.09 tons-1.vessel-1.years-1. This indicates that the fishers habit to dispose waste not in the right place can become a potential source of marine debris pollution. Maintaining the quality of fishery products is very important starting from improving the fisherman behaviour to the fishing port facilities to achieve the sustainability fishery product.


Low-cost investigation of wave dynamics across low energy reef environments in Indonesia
J Risandi, T Solihuddin, TL Kepel, A Daulat, A Heriati, E Mustikasari, and R Hidayat
IOP Publishing
Abstract The interaction between offshore waves and complex reef bottom profiles determines the hydrodynamic processes within the reef beaches, for instance, Sea-Swell (SS) wave dissipation, Infragravity (IG) wave generation as well as wave-induced currents and setups. These hydrodynamics phenomena are important to several ecological processes and control the associated shoreline erosion and flooding. Hence, a good understanding of the dynamics is needed that wave observations are challenging and expensive otherwise. Here we present a short term (12 hours) investigation of non-directional spectral waves using a series of HOBO pressure sensors. Six pressure sensors were deployed at 3 locations along the fringing reefs of Tunda Island, Banten Province - Indonesia. The wave spectra were estimated from the surface water fluctuations using linear wave theory for each hourly burst data. During observation, the Tunda waters were calm with significant wave heights were less than 10 cm with peak wave periods of ∼12 s at all sites. Despite the short period measurement due to memory issue, the result demonstrated the ability of HOBO pressure sensors to measure non-directional wave spectra at shallow water.


Panimbang Coastal Area Planning based on Disaster Mitigation
A Heriati, T Solihuddin, M I Marzuki, T Arifin, D Purbani, S Husrin, T L Kepel, E Mustikasari, C K Tito, A Daulat,et al.
IOP Publishing
Abstract As an attempt in the improvement of economic interest and areal quality, Sunda Strait is appointed as a National Strategic Area. The strait is quite a busy passage for commerce vessels and also acts as link between provinces. The 2018 tsunami event that affect this area has reminded us the importance of coastal area planning based on disaster mitigation. Panimbang District is one of the areas heavily affected by the tsunami, where the population reside and having their livelihoods around the coast, hence coastal area planning of Panimbang is very much needed. This research was conducted to see the condition of Panimbang District coastal area after the tsunami and how the existing national planning policies is in sync with planning policies at regional level in terms of disaster mitigation. Results of spatial analysis show that coastal areas have not adapted and mitigated optimally, we can see some settlements and tourist areas around coastal area are not heeding the policy on protecting coastal areas, this could happened due to lack of law enforcement or lack of socialization to the local community. This paper might provide recommendation to the local government in arranging coastal protection to keep the residential areas and essential infrastructure safe by making the structural and non-structural approaches.


Carbon sequestration potential in the rehabilitated mangroves in Indonesia
Mariska Astrid Kusumaningtyas, Terry L. Kepel, Tubagus Solihuddin, Ali Arman Lubis, Aditya Dwi P. Putra, Untung Sugiharto, Restu N. A. Ati, Hadiwijaya L. Salim, Eva Mustikasari, Aida Heriati,et al.
Wiley



Distribution of marine debris in Jakarta Bay and its implication to the coastal ecosystem
Nasir Sudirman, Devi Dwiyanti Suryono, August Daulat, Agustin Rustam, Hadiwijaya L Salim, and M Hikmat Jayawiguna
IOP Publishing
Abstract Citarum River, which ended up in Muaragembong, Bekasi Regency-West Java Province, is known recently as one of the most polluted rivers globally, including pollution caused by plastic litter. This research was conducted in the surrounding river, estuary, and mangrove ecosystem in Muaragembong, which aimed to determine macro debris and analyze its impact on the coastal ecosystem. Marine debris sampling in the mangrove ecosystem was done by line transect, while the net using for marine debris sampling surrounding river and estuary. The result showed that debris composition in Muaragembong consisted of 80% inorganic and 20% organic, where plastic debris dominated with 50-81% and was distributed throughout the estuary and mangrove ecosystem. The highest density was found in the mangrove ecosystem in the Kali Mati Estuary (Pantai Sederhana Village) with 222.67 waste/m2, while the heaviest waste was found in the Bendera Estuary (Pantai Bahagia Village) 4,663.64 grams/m2. This condition explained the lack of marine debris management in the Muaragembong estuary, where most inorganic debris originated from household litter. This research also supports data and information for baseline Indonesia’s marine plastic debris due to comprehensive data needed to reduce 70% of marine plastic debris by 2025.


Fishing Ground Mapping Based on Chlorophyll-A Distribution Using Aqua Modis Satellite Imagery in The Fisheries Management Area (FMA) 712
Yulius Yulius, Vaninda Aidina, Muhammad Ramdhan, and August Daulat
EDP Sciences
The fishing ground is identical and closely related to chlorophyll-a abundance in the waters, associated with its fisheries potential. This research has been conducted to determine the concentration and distribution of chlorophyll-a in the seas, especially in the Fisheries Management Area (FMA) 712 encompassing the Java Sea. The analysis used monthly time-series data collected from the satellite imagery over the last 11 years, taken through the ERDDAP website. The mean concentration of chlorophyll-a in the study area was 1.13 mg/l in June 2013. Based on 11 years of data processing, it can be concluded that the highest concentration of chlorophyll-a occurred in the west monsoon season from November to April, where increased rainfall caused the nutrient wash from terrestrial to the open waters. The lowest chlorophyll-a concentration happened in the east monsoon season from April to November, where the dry season arrived. The existence of pelagic fishes in FMA 712, such as Sardinella Lemurs and Sardinella Fimbriata, in waters highly influenced by the chlorophyll-a concentration, while Thunnus Sp. and Exocoetidae Sp. not affected significantly to the existence of chlorophyll-a concentration and its distribution.


Distribution of macro plastic debris in Muaragembong coastal bay during the east moonson and the east to west monsoon transition in 2020
Devi Dwiyanti Suryono, Restu Nur Afi Ati, Agus Setiawan, Agung Dhamar Syakti, Agustin Rustam, Hadiwijaya L. Salim, Nasir Sudirman, August Daulat, Mariska Astrid K, Nanda R. Prasetiawan,et al.
EDP Sciences
Marine debris pollution can threaten the sustainability of natural resources in coastal regions ecosystem. Marine debris is worldwide issue now and Indonesia considered as a second biggest polluter of plastic to the world ocean. Massive efforts have been applied to tackle marine debris, both by the central government and provincial level, to manage these problems and minimize the impact on the coastal ecosystem. Various types of marine debris threaten the mangrove and seagrass ecosystem by covering its roots and leaves, slowing down its growth rate, and even killing them. The aim of this research is to identify the composition of marine debris in estuary waters and mangrove ecosystem. The research activity was conducted in Muaragembong, Bekasi Regency, which is considered part of Jakarta Bay as the source of the marine debris site. The result showed that the marine debris composition during the east monsoon (July) was dominated by plastic with 71%, while during the transition east-to-west monsoon (November) ranged from 59% and equally distributed surrounding estuary waters and mangrove ecosystem. Fifteen types of macro plastic were found in waters in July, larger than those found in November (13 types). The predominant type of macro plastic is Styrofoam, followed by crackle plastic, sachets, and straws, most of which are single-use plastics that are transported to the estuary and then trapped in the mangrove ecosystem.


The role of seagrass ecosystem in small islands as a blue carbon in climate change mitigation in Indonesia (case study: Lembeh Island, Bitung Regency)
A Rustam, D D Suryono, A Daulat, and N Sudirman
IOP Publishing
Abstract Climate change phenomenon has occurred equally and globally all over the world during the last century, including Indonesia, which known as an archipelagic country with more than 17.000 islands, where most of the island considered as small islands. Lembeh Island known by its high biodiversity in marine resources, especially coral reef which associated with other coastal ecosystems such as mangrove and seagrasses and create a healthy environment. Seagrasses as a blue carbon ecosystem can be functioned as a carbon absorber from the atmosphere and storage in the sediment, and supported the climate change mitigation act in Indonesia. Based on field observation, Lembeh Island region has seven species from possible twelve seagrass species found in Indonesia. Enhalus acoroides and Thalassia Hemprichii dominated the seagrass existence in Lembeh Island with certain characteristics live in a sandy substrate, muddy area or coral reefs. Seagrass in Lembeh Island has potency on biomass carbon as much as 0.96 ± 1.327 MgCha−1 (mostly autochthonous), which lower than the potency of carbon stored in sediment reached more than 40 MgCha−1 (mostly allochthonous). Seagrass ecosystem play an important role in climate change mitigation act and should be supported, developed and collaborated with other coastal ecosystems sucha as coral reefs and mangroves.


Coastal Buffer Zone Management in Banten Province Coastal Region during the December 2018 Tsunami Waves in the Sunda Strait
A Daulat, T Solihuddin, H L Salim, A Heriati, S Husrin, M Ramdhan, and D Purbani
IOP Publishing
Abstract Natural disasters in coastal areas and small islands in Indonesia occurred several times in the last decade. Banten Province coastal region was directly affected by the tsunami waves last December 2018 due to the Anak Krakatau Volcano’s activities, covering Pandeglang and Serang Regencies. Regional and spatial planning in a coastal buffer zone is mandated by laws and regulations, both central and local, but still sometimes neglected. The spatial analysis was carried out by identifying land use/cover in Banten Province coastal area using high and medium resolution images acquired from the Google Earth website. The results of the land use/cover map observations, which validated with field data, showed that the built-up area from the tourism sector in the form of buildings, facilities, and infrastructures dominate the coastal buffer zone, both in Pandeglang and Serang Regencies, especially in Anyer District (22.3 ha), Carita District (10.7 ha), and Cinangka District (7.2 ha). Moreover, human settlements and supporting public facilities also contribute and dominate the built-up area on the coastal buffer zone in Panimbang District (15.8 ha) and Sumur District (6.4 ha). Implementation of a coastal buffer zone in a vulnerable area such as Banten Province should be evaluated to minimize the impact in the future.


Geographic information system application in small islands management (case study: Assessment of jetty suitability distribution in Derawan Island)
D Purbani, A Daulat, M Ramdhan, and L P A S C Kusuma
IOP Publishing
Abstract Derawan Island, with an area of 35.99 hectares, is a small island in Derawan Archipelago, located in Berau Regency, East Kalimantan Province. The waters in the Derawan archipelago rich in biodiversities such as coral reefs, mangroves, and seagrasses, so designated as a conservation area in 2016 and currently known as marine tourism destinations in Kalimantan, which contribute to the economy. Tourism in the Derawan islands increased significantly along with supporting infrastructures such as hotels, restaurants, and jetties. A study on jetty facilities conducted by comparing the changes of jetties infrastructure in Derawan island, wherein 2003, the jetties area was 6,977 m2, while in 2018, about 66,011 m2. Changes of jetties area mostly occurred in the western and southern parts of the island due to safety reasons, bathymetry, and hydrodynamic conditions. This condition raised an issue concerning water quality, aesthetics, and natural condition, decreasing its beauty and impact on the tourism sector. Spatial analysis for jetty distribution using GIS carried out and resulted in recommendations where the maximum number of jetties needed was five units with a length of about 70 m towards the sea. This recommendation may also be used to provide an alternative location for a jetty in Derawan Island in the future.


Study of coastline changes and land use change in marine protected area (Case study: Derawan Island, East Kalimantan Province)
D Purbani, M Ramdhan, H L Salim, A Daulat, D Dwiyanti, G Winarso, and S Syahputri
IOP Publishing
Abstract Derawan Island is an island with an area of 45 ha, it categorized as a small island and part of Derawan Islands archipelago located in East Kalimantan province. It designated as a conservation area by the decision of Berau District Head No. 516 of 2013 concerning the Reservation of Coastal Conservation Areas and Small Islands. Derawan Island, also known as the National Tourism Destination (DPN) based on its coral reefs diversity that considered adjacent to the Coral Triangle Initiative (CTI). The increase of Tourist visits to Derawan Islands since 2000, which affected land cover changes in Derawan Island coast such as for lodging, jetty and other infrastructure. Changes in land cover together with natural coastal processes causing abrasion in the west, and east sides, while accretion in the southeast side of the island. Land cover change especially built-up area from 2003 to 2018 is 6.25% per year. Observations and analyzes using DSAS (Digital Coastline Analysis System) conducted in 2003, 2011 and 2018 illustrates coastline change which shown by abrasion an accretion along Derawan Island. Abrasion trends increased from 2003, 2011 and 2018 with the highest abrasion rate up to 12.4 m / year, which occurred on the west side, while the highest accretion rate was 2.46 m / year on the southeast side. Based on several considerations and conditions, it is highly recommended that the coastal border for utilization in the islands is around 15 m.


Field Survey and Numerical Modelling of the December 22, 2018 Anak Krakatau Tsunami
Jose C. Borrero, Tubagus Solihuddin, Hermann M. Fritz, Patrick J. Lynett, Gegar S. Prasetya, Vassilios Skanavis, Semeidi Husrin, Kushendratno, Widjo Kongko, Dinar C. Istiyanto,et al.
Springer Science and Business Media LLC



Assessing Carbon Stock and Sequestration of the Tropical Seagrass Meadows in Indonesia
A’an J. Wahyudi, Susi Rahmawati, Andri Irawan, Hadiyanto Hadiyanto, Bayu Prayudha, Muhammad Hafizt, Afdal Afdal, Novi S. Adi, Agustin Rustam, Udhi. E. Hernawan,et al.
Springer Science and Business Media LLC



The use of high resolution satellite imagery to identify coral reef cover and its correlation with the abundance of reef fish in nias island, north sumatera, Indonesia

RECENT SCHOLAR PUBLICATIONS

Maritime Culture of Bantik Ethnic Group From North Sulawesi, Indonesia
Terry Louise Kepel, Steven Sumolang, Maya Pinkan Warouw, August Daulat, Nani ...
Journal of Marine Island and Cultures 13 (Institution for Marine & Island 2024



Coastal Hazards in the Sunda Strait: Mitigation Strategy and Coastal Management
A Heriati, E Mustikasari, T Solihuddin, HL Salim, A Daulat, D Purbani
IOP Conference Series: Earth and Environmental Science 1350 (1), 012030 2024



Assessment of a small island’s groundwater resilience under the pressure of anthropogenic and natural stresses on Tunda Island, Indonesia
T Solihuddin, J Prihantono, A Daulat, R Bramawanto, J Risandi, TL Kepel, ...
Environmental Earth Sciences 83 (12), 380 2024



Biomass carbon stocks in conserved and rehabilitated mangroves of Indonesia: Case studies from Biduk-Biduk, Karimunjawa, Pati and Indramayu
RNA Ati, K Khairunnisa, YP Rahayu, MA Kusumaningtyas, A Rustam, ...
BIO Web of Conferences 134, 02003 2024



Temporal variability on Seagrass Cover and Species Composition in a Tourism Hotspot: A case study in Derawan Island
MA Kusumaningtyas, A Zulfikar, A Rustam, HL Salim, YP Rahayu, ...
BIO Web of Conferences 134, 02001 2024



Changes in Seagrass Community Structure in Response to Sediment Load and Excess Nutrients, and its implication to Carbon Stocks in the Berau Marine Conservation Area
A Rustam, MA Kusumaningtyas, HL Salim, DD Suryono, RNA Ati, ...
Journal of Ecological Engineering 25 (9) 2024



Aboveground carbon stock of marine mangroves in Kepulauan Seribu Islands
MA Kusumaningtyas, TL Kepel, RNA Ati, HL Salim, A Rustam, ...
IOP Conference Series: Earth and Environmental Science 1251 (1), 012003 2023



Sedimentary seagrass carbon stock and sources of organic carbon across contrasting seagrass meadows in Indonesia
YP Rahayu, MA Kusumaningtyas, A Daulat, A Rustam, DD Suryono, ...
Environmental Science and Pollution Research 30 (43), 97754-97764 2023



Water Security In Tunda Island, Banten Indonesia: Potency & Threat
Kepel, Solihuddin, Risandi, Daulat, Heriati, Mustikasari, Mardiany, Hong
Journal of Marine and Island Cultures 12 (Institution for Marine & Island 2023



Preliminary Study Of Marine Debris Composition From Fisherman Activities: A Case Study On Cikidang Fishing Port, Pangandaran
NR Prasetiawan, N Sudirman, HL Salim, RNA Ati, TL Kepel, A Daulat, ...
IOP Conference Series: Earth and Environmental Science 1118 (1), 012082 2022



Preliminary study to estimate the potential input of solid waste to the area of fishing port, case study: Karangantu Fishing Port
HL Salim, N Sudirman, RNA Ati, TL Kepel, A Daulat, MA Kusumaningtyas, ...
IOP Conference Series: Earth and Environmental Science 1118 (1), 012057 2022



Low-cost investigation of wave dynamics across low energy reef environments in Indonesia
J Risandi, T Solihuddin, TL Kepel, A Daulat, A Heriati, E Mustikasari, ...
IOP Conference Series: Earth and Environmental Science 1119 (1), 012033 2022



Panimbang Coastal Area Planning based on Disaster Mitigation
A Heriati, T Solihuddin, MI Marzuki, T Arifin, D Purbani, S Husrin, TL Kepel, ...
IOP Conference Series: Earth and Environmental Science 1095 (1), 012005 2022



Biodiversity and Aquatic Vegetation Succession in Biawak Island Marine Protected Area, Indramayu-West Java
AA Hutahaean, A Rustam, A Daulat, YP Rahayu, DD Suryono, HL Salim, ...
Jurnal Segara 18 (1), 37-46 2022



Determining The Capacity of Temporary Evacuation Shelter in Carita and Labuan District Pandeglang Regency
D Purbani, M Ramdhan, HL Salim, A Daulat, A Heriati, B Ontowirjo, ...
Jurnal Segara 18 (1), 13-24 2022



Carbon sequestration potential in the rehabilitated mangroves in Indonesia
MA Kusumaningtyas, TL Kepel, T Solihuddin, AA Lubis, ADP Putra, ...
Ecological Research 37 (1), 80-91 2022



Pengaruh Perubahan Lingkungan Terhadap Stok Karbon pada Ekosistem Lamun di Pulau-Pulau Kecil, Studi Kasus: Gugusan Kepulauan Seribu
A Rustam, YP Rahayu, DD Suryono, HL Salim, A Daulat, ...
Jurnal Kelautan Nasional 16 (3), 197-208 2021



Mitigasi Bencana Gunungapi Anak Krakatau (GAK) di Kecamatan Rajabasa Kabupaten Lampung Selatan Berbasis Tempat Evakuasi Sementara (TES)
D Purbani, T Solihuddin, S Husrin, HL Salim, M Ramdhan, A Heriati, ...
Jurnal Kelautan Nasional 16 (3), 185-196 2021



Hydro-Oceanographic Characteristics In Karimunjawa Coastal Waters During The 1st Transitional Season
Y Yulius, J Prihantono, D Gunawan, M Ramdhan, A Daulat, NKK Putra
Jurnal Segara 17 (2), 107-116 2021



Distribution of marine debris in Jakarta Bay and its implication to the coastal ecosystem
N Sudirman, DD Suryono, A Daulat, A Rustam, HL Salim, MH Jayawiguna
IOP Conference Series: Earth and Environmental Science 925 (1), 012017 2021

MOST CITED SCHOLAR PUBLICATIONS

Kualitas perairan Natuna pada musim transisi
MA Kusumaningtyas, R Bramawanto, A Daulat, WS Pranowo
Depik 3 (1) 2014
Citations: 92



Stok karbon dan struktur komunitas mangrove sebagai blue carbon di Tanjung Lesung, Banten
RNA Ati, A Rustam, TL Kepel, N Sudirman, M Astrid, A Daulat, ...
Jurnal Segara 10 (2), 119-127 2014
Citations: 91



Assessing carbon stock and sequestration of the tropical seagrass meadows in Indonesia
AJ Wahyudi, S Rahmawati, A Irawan, H Hadiyanto, B Prayudha, M Hafizt, ...
Ocean Science Journal 55, 85-97 2020
Citations: 66



Field survey and numerical modelling of the December 22, 2018 Anak Krakatau tsunami
JC Borrero, T Solihuddin, HM Fritz, PJ Lynett, GS Prasetya, V Skanavis, ...
Pure and Applied Geophysics 177, 2457-2475 2020
Citations: 53



Peran ekosistem lamun sebagai blue carbon dalam mitigasi perubahan iklim, studi kasus Tanjung Lesung, Banten
A Rustam, TL Kepel, RN Afiati, HL Salim, M Astrid, A Daulat, ...
Jurnal Segara 10 (2), 107-117 2014
Citations: 44



Ekosistem lamun sebagai bioindikator lingkungan di P. Lembeh, Bitung, Sulawesi Utara
A Rustam, TL Kepel, MA Kusumaningtyas, RNA Ati, A Daulat, ...
Jurnal Biologi Indonesia 11 (2) 2016
Citations: 31



Pedoman pengukuran karbon di ekosistem padang lamun
A Rustam, NS Adi, A Daulat, W Kiswara, DS Yusup, RA Rappe
Institut Teknologi Bandung. Bandung 2019
Citations: 29



Carbon sequestration potential in the rehabilitated mangroves in Indonesia
MA Kusumaningtyas, TL Kepel, T Solihuddin, AA Lubis, ADP Putra, ...
Ecological Research 37 (1), 80-91 2022
Citations: 25



Dampak Tsunami Selat Sunda Desember 2018 Di Provinsi Banten dan Upaya Mitigasinya
T Solihuddin, HL Salim, S Husrin, A Daulat, D Purbani
Jurnal Segara 16 (1) 2020
Citations: 24



Sebaran kandungan CO2 terlarut di perairan pesisir selatan Kepulauan Natuna
A Daulat, MA Kusumaningtyas, RA Adi, WS Pranowo
Depik 3 (2) 2014
Citations: 23



Cadangan karbon ekosistem mangrove di Sulawesi Utara dan implikasinya pada aksi mitigasi Perubahan iklim
TL Kepel, RNA Ati, A Rustam, YP Rahayu, MA Kusumaningtyas, A Daulat, ...
Jurnal Kelautan Nasional 14 (2), 87-94 2019
Citations: 17



Dinamika struktur komunitas lamun Kepulauan Karimunjawa, Kabupaten Jepara
A Rustam, YPR Ningsih, DD Suryono, A Daulat, HL Salim
Jurnal Kelautan Nasional 14 (3), 179-190 2019
Citations: 13



Mangrove forest change in Nusa Penida marine protected area, Bali-Indonesia using Landsat satellite imagery
A Daulat, WS Pranowo, SN Amri
International Journal of Remote Sensing and Earth Sciences 15 (2), 141-156 2018
Citations: 13



S. Pranowo, W.(2014). Kualitas perairan Natuna pada musim transisi
MA Kusumaningtyas, R Bramawanto, A Daulat
Depik 3 (1), 10-20
Citations: 13



Ekologi dan Struktur Komunitas Lamun di Teluk Ratatotok, Minahasa Tenggara, Sulawesi Utara
MA Kusumaningtyas, A Rustam, TL Kepel, RNA Ati, A Daulat, ...
Jurnal Segara 12 (1), 1-9 2016
Citations: 12



Sedimentary seagrass carbon stock and sources of organic carbon across contrasting seagrass meadows in Indonesia
YP Rahayu, MA Kusumaningtyas, A Daulat, A Rustam, DD Suryono, ...
Environmental Science and Pollution Research 30 (43), 97754-97764 2023
Citations: 8



Study of coastline changes and land use change in marine protected area (Case study: Derawan Island, East Kalimantan Province)
D Purbani, M Ramdhan, HL Salim, A Daulat, D Dwiyanti, G Winarso, ...
IOP Conference Series: Earth and Environmental Science 561 (1), 012056 2020
Citations: 8



Sunda strait Tsunami impact in Banten Province and its mitigation measures
T Solihuddin, HL Salim, S Husrin, A Daulat, D Purbani
Jurnal Segara 16 (1), 15-28 2020
Citations: 8



Water Security In Tunda Island, Banten Indonesia: Potency & Threat
Kepel, Solihuddin, Risandi, Daulat, Heriati, Mustikasari, Mardiany, Hong
Journal of Marine and Island Cultures 12 (Institution for Marine & Island 2023
Citations: 6



The water quality of Natuna coastal water during transitional season
MA Kusumaningtyas, R Bramawanto, A Daulat, WS Pranowo
DEPIK Journal of Science-Aquatic, Coastal and Fishery Sciences 3 (1), 10-20 2014
Citations: 6