Hefni Effendi

Bogor Agricultural University | IPB · Environmental Research Center (ERC)

The focus on the growth of modern retail has become increasingly important due to several generated externalities. Therefore, this research aimed to identify spatial distributional pattern of modern retail in order to implement precise policies. Data were obtained from The Department of Licensing Service of Yogyakarta City and supplemented with obs...

Phytoremediation is one way that can be used to decontaminate wastewater by using plants and plant parts both in situ and ex-situ. In combining recirculation systems and phytoremediators (plants that can assimilate nutrients N and P generated from the biofilter), water becomes more efficient, and the quality remains good. This study aimed to analyz...

The mangrove ecosystem has a higher ability of CO 2 absorption than other vegetations. However, the effort to establish the mangrove to be a carbon stock area has not been achieved. Makassar has Tallo River, covered with mangrove vegetation along its riverbank, which is potent to be managed as a green open space. The observations indicated that Tal...

ABSTRAK Penelitian tentang estimasi dan model pendugaan biomassa pada tegakan pohon mangrove telah banyak dilakukan baik dalam tingkat ekosistem maupun spesies, namun belum pernah dilakukan pada spesies Nypa fruticans. Penelitian ini bertujuan untuk membuat sebuah model penduga nlilai biomassa Nypa fruticans di Sungai Tallo yang terdapat di Makassa...

The economic development in the Ciliwung watershed has brought about various changes in the downstream area. Without consideration for the environment, development in urban areas will have a negative impact on water quality and aquatic life. Environmental DNA (eDNA) is a technology that can assist humans in producing more comprehensive biodiversity...

The purpose of this study was to assess the effect of oil spills on seawater quality along the coastal waters of Karawang Regency. Several laboratories were involved in measuring water quality to get representativeness of the location of the exposed waters both spatially and temporally. The measurement of seawater quality was carried out in situ an...

Sungai Batang Arau merupakan sungai terpanjang kedua di Kota Padang (Sumatera Barat). Banyaknya aktivitas antropogenik dapat menyebabkan penurunan kualitas air. Penelitian ini bertujuan menentukan hubungan kualitas air dengan parameter hidrologi sungai Batang Arau (2013-2020). Data yang diolah berupa data sekunder dari beberapa instansi di Kota Pad...

Segara Anakan lagoon has continuously gained pressures as a result of human activities. Unsustainable land use and forest destruction in the upper river areas have brought about erosion bringing also heavy metals into the lagoon. This study investigated the distribution of heavy metals (Ag, Hg, and Cd) concentration and determined the pollution sta...

This article demonstrated an easily applicable method for measuring the similarity between a pair of point patterns, which applies to spatial or temporal data sets. Such a measurement was performed using similarity-based pattern analysis as an alternative to conventional approaches, which typically utilize straightforward point-to-point matching. U...

Plankton is a biota community that is able to adapt and serve as natural food for fish. This study aims to analyze the structure of the plankton community and its spatial distribution so that this research can be used as information for swamp aquaculture. This research was conducted in July and August 2019. Sampling was done at ten stations by cons...

Species with limited dispersal abilities are often composed of highly genetically structured populations across small geographic ranges. This study aimed to investigate the haplotype diversity and genetic connectivity of the coastal horseshoe crab (Tachypleus gigas) in Indonesia. To achieve this, we collected a total of 91 samples from six main T....

Pencemaran laut dapat menimbulkan dampak negatif bagi usaha perikanan budidaya. Untuk itu dibutuhkan formula perhitungan kompensasi yang sesuai dan tepat. Penelitian ini bertujuan merumuskan formula perhitungan kompensasi usaha perikanan budidaya dengan merekonstruksi formula yang terdapat di PermenLH No. 7/2014. Rekonstruksi formula dianalisis sec...

Sand mining activities in Pasir Sakti District, East Lampung Regency, have changed the landscape and the allotment of land around it. The former sand mining area now becomes large puddles that are not utilized. This study aimed to analyze the suitability of water quality in ex-sand mining areas for tilapia (Oreochromis niloticus) culture. Observati...

Mangrove ecosystem services, aside for the fisheries sector, also have ecosystem services in mitigating climate change as carbon sinks and storage. Musi river estuary located in Banyuasin Regency, South Sumatra has the potential of mangrove forests as carbon reserves. The purpose of the study is to analyze the community structure, potential carbon...

Segara Anakan lagoon in Indonesia receives a variety of contaminants from numerous and various human activities. One of these was heavy metals, which were dangerous pollutants and will accumulate in the environment. This study aimed to determine the heavy metals content in sediment and water in the Segara Anakan lagoon. Those data were then scrutin...

Previous studies have reported that extant horseshoe crabs, including Atlantic and Asian horseshoe crab, spawned in intertidal zone during high tide season. Limited information about spawning nest of the horseshoe crab especially Tachypleus gigas in Indonesia has not been known yet. Moreover, according to the IUCN, the conservation status of T. gig...

Salah satu upaya dalam mendukung pengembangan wilayah pesisir adalah melalui pengelolaan ekosistem mangrove. Sumber daya mangrove selain berperan dalam pengembangan ekonomi masyarakat pesisir juga memiliki peranan dalam mitigasi emisi karbon. Penelitian ini bertujuan memberikan gambaran tentang persepsi dan partisipasi masyarakat dan posisi stakeho...

The cultivation of Alabio ducks (Anas Platyrynchos Borneo) so far is still natural and only involves one parameter; furthermore, each location has different characteristics. The hierarchical structure constructed has a ranking of importance as an alternative option for ducks' development in peatland ecosystems. This research aims to formulate a str...

Hasani Q, Pratiwi NTM, Wardiatno Y, Effendi H, Martin AN, Efendi E, Pirdaus P. 2020. Phytoremediation of Iron (Fe) in Ex-sand Mining Waters by Water Hyacinth (Eichhornia crassipes (Mart.) Solms). The high concentration of iron (Fe) has allegedly caused the water quality of puddles at sand mining area. The poor water quality, in which high contentra...

Dumai merupakan kawasan yang memiliki berbagai aktivitas antropogenik yang dapat mengakibatkan timbulnya tekanan terhadap ekosistem di perairan Dumai dan dapat menyebabkan perairan tidak produktif dan keanekaragaman hayati menurun. Penelitian ini bertujuan untuk mengetahui tingkat beban pencemaran di Perairan Dumai menggunakan metode purposive samp...

Seagrass is a water plant that has flowers and ability to adapt to live and grow in the sea like a terrestrial plant. The survival of seagrass is greatly influenced by physical and chemical parameters of waters, such as pH, temperature, and salinity. The Intergovernmental Panel on Climate Change (IPCC) report by the end of 21st century, CO2 in the...

The usage of plastic has been increasing from year to year for its durable, lightweight, sturdy, easy to form, and low cost production, so that plastic becomes a popular material. Plastics have affinities with persistent organic pollutant such as PCB, DDT, PAH and phthalates that can damage the ecosystem as well as harm to human. In this study plas...

Phytoremediation is one effective method used for reducing the iron (Fe) from waters. Azolla pinnata is a plant that has potential as an agent of phytoremediation of Fe in waters. This study aims to verify the ability of Azolla pinnata to reduce Fe from sand excavated water in Pasir Sakti District, East Lampung Regency, Indonesia. The study was con...

Sebagai sebuah entitas akademik dan sebagai pemikir, DGB (Dewan Guru Besar) IPB University memformu-lasikan suatu gagasan tentang Kota Tepian Air Ramah Lingkungan yang dirajut dalam pengelolaan sum-berdaya air berkelanjutan, yang dapat diterapkan pada sejumlah kota di tanah air baik yang berada di tepi sungai, tepi danau, tepi rawa, maupun di tepi...

Meningkatnya konsentrasi karbondioksida (CO2) di atmosfer dapat menyebabkan asidifikasi laut. Asidifikasi menjadi ancaman bagi lamun. Salah satu tantangan yang harus dihadapi saat ini adalah memprediksi dampak jangka panjang dari asidifikasi laut terhadap fisiologi lamun. Tujuan penelitian ini untuk menganalisis respons fisiologis lamun C. rotundat...

The availability of clean water is one of the main problems for the people in Kendari City. Overutilization of groundwater can cause seawater intrusion to groundwater. This study aims to identify and map seawater intrusion distribution to shallow groundwater based on water quality data. Sampling was obtained from 100 dug wells of the inhabitant (n=...

One of the ecological functions of mangroves ecosystem is to store carbon. Yet, on the other hand it is potentially to cause greenhouse gas emissions through litter degradation even though its value is lower compared to the absorption value. Based on these two facts, mangrove management as a Green Open Space in the Tallo River area of Makassar City...

One of the ecological functions of mangroves ecosystem is to store carbon. Yet, on the other hand it also has the potential to cause greenhouse gas emissions through litter degradation even though its value is lower compared to the absorption value. Based on these two facts, mangrove management as a Green Open Space in the Tallo river area of Makas...

Penelitian tentang estimasi dan model pendugaan biomassa pada tegakan pohon mangrove telah banyak dilakukan baik dalam tingkat ekosistem maupun spesies, namun belum pernah dilakukan pada spesies Nypa fruticans. Penelitian ini bertujuan untuk membuat sebuah model penduga nlilai biomassa Nypa fruticans di Sungai Tallo yang terdapat di Makassar-Indone...

Yunandar, Effendi H, Widiatmaka, Setiawan Y. 2020. Plankton biodiversity in various typologies of inundation in Paminggir peatland, South Kalimantan, Indonesia on dry season. Biodiversitas 21: 1012-1019. The aim of the study was to analyze the typology of inundation areas and plankton biodiversity in Paminggir peatland, South Borneo, Indonesia. Typ...

Wood industry produces a large amount of waste water that contains various pollutants. These pollutants are mostly dangerous for the environment. This research work aims to analyze the ability of phytoremediation for reducing pollutants in wood industrial waste water. These experiments usee Chrysopongon zizanoides L. and Ipomoea aquatica Forsk as p...

Fragmented and non-fragmented soft corals showed antibacterial activities. Soft corals were gradually extracted using methanol, ethyl acetate, and hexane. Crude extract of the samples was tested its antibacterial activity, Minimun Inhibitory Concentration, toxicity (Brine Shrimp Lethality Test method), and phytochemicals. Overall, the antibacterial...

Salvinia molesta is an aquatic weed having very high growth rate. The high abundance of this species biomass could be utilized as a source of alternative energy. This research was aimed to utilize S. molesta as a substrate for biogas production using batch system in order to reduce euthrofication effect in a lake. Cow manure was used as starter for...

Current development on method and technique for data processing in remote sensing has received a great importance, since it provides a base for a myriad of applications, including land use monitoring. OBIA- and pixel-based approach are commonly used as classification technique in remote sensing. This present work aimed to compare both approaches in...

Abstract. The dynamic changes of aquatic ecosystem have an important role in order to maintain the sustainability of peat land ecosystem. The aquatic ecosystem is the main supply of freshwater in the Barito basin region, contribute to the water quality for consumption and production, habitat for aquaculture. Therefore, the spatial modelling of inun...

Kegiatan eksplorasi minyak dan gas bumi dapat menghasilkan limbah yang berpotensi toksik bagi lingkungan perairan. Penelitian ini bertujuan untuk menghitung konsentrasi supernatan cutting yang dapat mematikan 50% biota uji dengan waktu pemaparan 96 jam. Percobaan menggunakan wadah kaca untuk menentukan nilai LC50 pada waktu pemaparan 24, 48, 72 dan...

Liquid waste of tofu production has a high content of organic matter which can lead to a decrease in water quality. This study was aimed to obtain an optimal combination of duration and waste concentration in tofu liquid waste treatment using Chrysopogon zizanioides. Response surface method using Design Expert 7.0 software was applied to optimize c...

ABSTRAKCahaya matahari merupakan salah satu faktor lingkungan terpenting baik secara langsung maupun tidak langsung bagi organisme fotosintetik perairan dalam menyediakan energi untuk diubah menjadi energi kimia dengan bantuan klorofil. Penelitian ini bertujuan untuk mengkaji hubungan antara ketersediaan cahaya matahari dan konsentrasi pigmen fotos...

The Bali Strait waters become a place for various development activities that connect Java Island and Bali Island so that it is thought to have an impact in the life of microalgae that play an important role in the wealth of their water resources. This study aims to explore the spatiotemporal distribution of marine microalgae, which has the potenti...

Seagrass symbiotic bacteria have various functions, one of which is as algaside. There are 2 types of symbionts namely endosymbiont and episymbiont. This study aims to test the initial activity of algaside episymbiont Enhalus acoroides on diatome and dinoflagellate group plankton. The method used for testing is Mixed Algal-bacterial cultures. On me...

Masuknya bahan-bahan pencemar ke dalam badan air sungai menyebabkan turunnya kualitas air sungai. Salah satu sungai yang diduga telah mengalami pencemaran adalah Kali Angke. Penelitian ini bertujuan untuk menentukan status mutu air dan tingkat pencemaran Kali Angke menggunakan metode Indeks Pencemaran (IP) dan Indeks Canadian Council of Minister of...

Fauziah A, Bengen DG, Kawaroe M, Effendi H, Krisanti M. 2019. Spatio-temporal distribution of microalgae producing chlorophyll and carotenoid pigments in Bali Strait, Indonesia. Biodiversitas 20: 61-67. The Bali Strait waters become a place for various development activities that connect Java Island and Bali Island so that it is thought to have an...

Studies on the fluxes of greenhouse gases in mangrove ecosystems especially during tides are relatively scarce. The research was conducted in Tallo River Makassar which is a mangrove ecosystem habitat. Gas sampling was done by utilising size 0,5x0,5x1 m3 chamber through a syringe during the tidal periods. Gas analysis was done using gas chromatogra...

The growth of population and industrialization combined with land development along river cause water pollution and environmental deterioration. Cisadane River is one of the river in Indonesia where urbanization, industrialization, and agricultural are extremely main sources of pollution. Cisadane River is an interesting case for investigating the...

Pesanggrahan River watershed has several activities such as residential and commercial area in its catchment area. The purpose of this study was to analyse water quality related to spatial land use in Pesanggrahan River using GIS Analysis. River water quality in some locations, did not meet water quality standard of class III. From pollution load e...

Vetiver is an environmentally friendly plant since it has non-invasive characteristic, has a high level of heavy metal tolerance, and could reduce N and P content originated from organic water pollutants. Tilapia (Oreochromis niloticus) cultivation wastewater, containing high concentration of N and P, was treated with vetiver (Vetiveria zizanioides...

Tofu production is a domestic industry, that most of it has no appropriate wastewater treatment facilities. Wastewater of tofu contains high organic matter which can decrease the water quality. This study aimed to analyze capability of Vetiveria zizanioides, L and zeliac in treating tofu wastewater industry. Zeliac is a new adsorbent, which consist...

The aim of this research was to use tilapia farming waste as a nutrient for plant growth in recirculation systems in order to make use of water efficiently and to reduce pollution materials entering the aquatic environment. Aquaculture wastes such as residual feed and faeces, after experiencing decomposition, can be utilized as a nutrient supply fo...

Microalgae contain lipids and fatty acids that can be the raw materials of biofuel. Previous studies have been known of using cultivation systems to obtain biomass of C. vulgaris which can be extracted to obtain lipid and fatty acid content. The observational step was observed ten days in photobioreactor and open pond for harvesting biomass using N...

Increased wastewater from the batik and textile industries as well as the content of chromium released from the coloring process will negatively affect an aquatic environment. The phytoremediation technique using Vetiver (Chrysopogon zizanioides L.) was applied to treat the wastewater. A hydroponic system with batik wastewater concentrations of 0%,...

Waste of batik industry that is not well processed potentially contaminate the aquatic environment. Liquid waste concentration of 0%, 50%, 75%, and 100% was applied to vetiver (Chrysopogon zizanioides L.) grown in floating wetland system for treatment of batik industry liquid waste. Research was conducted in Akademi Kimia Analis (AKA) Bogor, Indone...

p> Vulnerability analysis is one of the methods for determining ef f ective management of coastal and marine resources. Seribu islands potentially affected due to oil spills. The oil spills incident in this area caused by shipwreck from traffic on Tanjung Priok port and ALKI 1, as well as accident of petroleum exploration and exploitation. At least...

Floating wetlands on a container (25 L) using Vetiveria zizanioides (L) Nash was applied to remediate crude oil spill in water for four weeks. Three plants (height 10 cm) were inserted in a pot containing rockwool, floated on crude oil spiked water. Treatment included 3 and 6 pot plants with 1% crude oil concentration. Six pot plants during 4 weeks...

p> Vulnerability analysis is one of the methods for determining ef f ective management of coastal and marine resources. Seribu islands potentially affected due to oil spills. The oil spills incident in this area caused by shipwreck from traffic on Tanjung Priok port and ALKI 1, as well as accident of petroleum exploration and exploitation. At least...

Karang lunak adalah bagian dari ekosistem terumbu karang yang dapat menghasilkan senyawa metabolik sekunder, yang merupakan respon terhadap lingkungan untuk bertahan hidup. Metabolik sekunderini salah satunya adalah sebagai antioksidan. Tujuan penelitian ini untuk melihat senyawa-senyawa yang terkandung dalam karang lunak Sinularia sp dan Lobophytu...

Ekosistem mangrove memiliki kemampuan menyerap CO2 lebih tinggi dibandingkan dengan vegetasi tumbuhan lainnya. Namun upaya pengelolaannya sebagai kawasan penyimpan stok karbon masih belum maksimal. Kota Makassar memiliki Sungai Tallo yang sepanjang bantarannya ditumbuhi oleh vegetasi mangrove dan sangat potensial untuk dikelola sebagai ruang terbuk...

The main problem of coastal waters in Indonesia is generally caused by anthropogenic activities that promoting the accumulation of organic matters in sediments. It was well-known that organic matters in sediment might influence the macrozoobenthic communities. AMBI and M-AMBI are two recent developed indices which could be used to evaluate the heal...

The surface sediments were identified from west part of Java Sea to evaluate spatial distribution and ecological risk potential of heavy metals (Hg, As, Cd, Cr, Cu, Pb, Zn and Ni). The samples were taken from surface sediment (<0.5 m) in 26 m up to 80 m water depth with Eikman grab. The average material composition on sediment samples were clay (9....

Ciliwung is the biggest river in Jakarta. It is 119 km long with a catchment area of 476 km². It flows from Bogor Regency and crosses Bogor City, Depok City, and Jakarta before finally flowing into Java Sea through Jakarta Bay. The water quality in Ciliwung River has degraded. Many factors affect water quality. Understanding the relationship betwee...

The rapid growth of water hyacinth in Cirata Reservoir becomes an issue that must be addressed, because of disrupting the function of the reservoir as a power plant. Research on reduction of water hyacinth population using grass carp was performed on floating net in Cirata Reservoir, West Java, Indonesia.

This study aimed to analyze the effectiveness of tamarind seeds as a natural coagulant in the treatment of traditional gold mine wastewater. Treatment dosage of tamarind seed powder included 0.3 g/L, 0.4 g/L and 0.5 g/L. Coagulant of tamarind seeds can lower concentration of TSS (24.32 ± 9.74%) and mercury (59.70 ± 33.33%). However, COD could not b...

Increasing fish cultivation activity triggers negative impact on the environment. An effort likely applied to cope with this problem is phytoremediation with aquaponics system. Aims of this study were to process organic waste from the cultivation of gouramy, and then the processed waste is utilized as a medium for growing romaine lettuce in recircu...

Ammonia concentration of catfish culture wastewater underwent reduction up to 90.73% under vetiver treatment. Length and weight range of catfish under vetiver treatment was higher than that of without vetiver. Similarly, survival rate of catfish at vetiver treatment was higher compared with that at the control. Vetiver was able to remove ammonia an...

The aim of this research was to examine the ability of butterhead lettuce (Lactuca sativa L. var. Capitata) to absorb the nitrogen and phosphorus derived from the waste of tilapia (Oreochromis niloticus) cultivation in a aquaponic system. Tilapia was cultivated along with three treatments of plant namely T1 (without plants), T2 (10 plants) and T3 (...

Upper Citarum Watershed is critically threatened by LULCC especially due to rapid urbanization, forest conversion and agricultural expansion. Such changes have degraded the watershed and significantly impacted on the water quality in the upper Citarum River. In order to prevent such degradation, periodic LULCC monitoring is paramount. This study em...

The Mahakam Delta typically consisting of several ecosystems has been identified as one of biodiversity hotspot in Kalimantan Island. In order to provide phytoplankton distribution, diversity and abundance data, a research on 4 stations representing delta plain (ST1) and delta front (ST2, ST3, ST4) was performed. The studies describe phytoplankton...

A rapid interpretation of river water quality is a compulsory since river is a dynamic ecosystem, influenced by various activities in the river bank. Hence a preliminary rapid river water quality status determination using pollution index on locations near IPB Dramaga Campus was simulated. Based on grab sampling on 5 sites in River Cihideung, River...

Spreading heavy metals in the water column may subsequently be accumulated in sediment because of low solubility then become sensitivity indicator for aquatic organism. Ecological risk is assessed through the heavy metals concentration in the surface sediment. Sediment samples were grabbed from 20 stations in Mahakam Delta. Hakanson method was used...