Dwi Sunu Widyartini

• Professor
• Lecturer at Jenderal Soedirman University

The rehabilitation of mangroves depends on the availability of high-quality, sufficiently prominent seeds. Currently, a lot of mangrove nursery activities continue to employ traditional techniques, which results in low-quality and slowly growing seedlings. The mangroves of Jakarta were selected because they represent a heavily polluted mangrove eco...

Komala R, Noer MI, Miarsyah M, Widyartini DS, Handayani. 2024. Assess the level of damage to the coral reef ecosystem based on substrate coverage on Bira Island, Kepulauan Seribu, Indonesia. Biodiversitas 25: 971-977. Coral reefs are coastal ecosystems that have an important ecological and economic role. Environmental pressures cause damage to ecos...

Phytoplankton are primary producers in aquatic ecosystems, their abundance is determined by environmental changes, so phytoplankton are often used as bioindicators of waters. The aim of this research was to determine the diversity and abundance of phytoplankton in Menjer Lake, to measure the environmental factors that determine the diversity and ab...

Brachionus is a rotifer that has a fast reproductive rate and plays an important role as live food for various fish. Live food has better nutritional content and cannot be completely replaced by artificial food. Microalgae food culture together with rotifers plays a dual role, apart from being used as direct food, it also functions as a buffer for...

Handayani S, Widhiono I, Widyartini DS. 2023. Macroalgae diversity and its relationship with environmental conditions in polluted waters of Seribu Islands, Jakarta Bay, Indonesia. Biodiversitas 24: 6279-6286. Macroalgae are one of the important marine primary producers because they support the life of other organisms at a higher trophic level in aq...

Phytoplankton are organisms that are sensitive to environmental changes and their presence can be used as an indicator of aquatic productivity. Physical factors in the waters can affect the abundance of phytoplankton. The purpose of this study is to determine the relationship between physical factors (temperature, brightness, TDS and TSS) and the a...

The purpose of this study was to examine impact of input of nutrients from the catchment to the level of pollution of Lake Menjer Wonosobo. The method was carried out quantitatively by calculating the allocation of pollutant loads from human activities. The water quality status was assessed using the storet method. The highest total P entering Menj...

Handayani S, Widhiono I, Widyartini DS. 2023. Macroalgae diversity in the Pari Island Cluster, Seribu Islands District, Jakarta, Indonesia. Biodiversitas 24: 1659-1667. Macroalgae are primary producers of the ocean that support the life of other organisms at higher trophic levels in aquatic ecosystems. This study aimed to determine the diversity of...

Widyartini DS, Hidayah HA, Insan AI. 2023. Diversity and distribution pattern of bioactive compound potential seaweed in Menganti Beach, Central Java, Indonesia. Biodiversitas 24: 1125-1135. Seaweed has great potential in the pharmaceutical industry. This study aims to obtain data on the diversity and distribution of bioactive compound potential se...

Macroalgae have a high species diversity but are very susceptible to environmental changes or ecological pressures that can affect their existence. Pecaron Beach conditions have a substrate type of sand and coral fragments. This study aims to determine the distribution pattern of macroalgae in the waters of Pecaron Beach Kebumen. The research metho...

Pedalen Beach, Kebumen, has a type of water substrate consists of sand, coral fragments, and coral overgrown with macroalgae. This study aims to determine the species diversity and distribution pattern of Phaeophyta found in that waters. This research is to explore and utilize macroalgae as a sustainable alginate resource. This study uses a survey...

Regarding species and communities, macroalgae in the waters have a significant role in supporting an ecosystem. Indonesia has an abundant diversity of macroalgae species, but studies on macroalgae on ecological functions and their relation to climate change are still not widely studied. This review provides information and knowledge about the funct...

Rumput laut Sargassum polycystumdigunakan untuk menghasilkan alginat yang dibutuhkan oleh berbagai industri.Pembentukan alginat pada thallusrumput laut tidak dapat terbentuk tanpa adanya klorofil yang berperan dalam proses fotosintesis.Oleh karena itu, rumput laut membutuhkan unsur besi dan magnesium untuk menunjang keberadaan klorofil.Hasil peneli...

The Diatom of Melosira sp. is one of the potential microalgae candidates for future biofuel resource due to its high lipid profile and fatty acid content, high growth rate, and a quick deposition rate. Salinity stress is one of the environmental factors affecting the growth of microalgae and their lipid content. This research was conducted to ident...

Seaweed is a source of foreign exchange and income for coastal communities. Besides being able to be used as food, drink, and medicine, seaweed which is rich in cellulose, has the potential to be processed into bioethanol. Bioethanol is used as a raw material for the manufacture of ethanol derivatives. The study aimed to determine the biomass and b...

Rumput laut merupakan salah satu sumber devisa negara dan sumber pendapatan bagi masyarakat pesisir. Selain dapat digunakan sebagai bahan makanan, minuman dan obat-obatan, rumput laut yang kaya akan selulosa sangat berpotensi untuk diproses menjadi bioetanol. Bioetanol digunakan sebagai bahan baku pembuatan turunan etanol. Tujuan penelitian adalah...

Karang Bolong Beach is a beach located at the eastern tip of the island of Nusakambangan Cilacap. Karang Bolong Beach has a substrate type in the coral and composite substrate (fragment coral, rock, and sand). Therefore, a lot of seaweed grows there. This research aims to determine the macroalgae community on different substrates at Karang Bolong B...

Hydrocolloid seaweed is a seaweed which contains agar, carrageenan and alginate, which are widely used as industrial raw materials. This study aims to determine the type composition of hydrocolloid seaweed and its density based on the characteristics of the bottom waters in the intertidal area of East Nusakambangan Cilacap. The waters of East Nusak...

Phytoplankton blooms are a problem that often occurs in estuarine and coastal ecosystems. Changes in phytoplankton community species composition, diversity, biomass, and distribution were caused by conditions of seasonal and temporal variation. The immediate location of the estuary ecosystem is near cities, rapid economic growth and human activity...

Perairan Pantai Karangtengah Nusakambangan Cilacap memiliki berbagai macam tipe substrat yaitu pasir, karang, dan campuran. Kondisi pantai dengan banyak tipe substrat memungkinkan berbagai spesies rumput laut untuk tumbuh. Informasi terkait keanekaragaman dan dominansi spesies rumput laut penghasil hidrokoloid di perairan Pantai Karangtengah belum...

River Sapuregel empties into the eastern region of Segara Anakan Cilacap. It is one of the major rivers surrounded by mangrove forests and has a variety of biological resources, including fish. The research aimed to study the fish diversity and composition Sapuregel river mouth of Segara Anakan Eastern Area Cilacap. Research on fish diversity was c...

The Segara Anakan is a fertile estuarine of Indonesian water having strategic values for various uses. Increased human activities have increased the potential risk of deteriorating environmental quality and subsequently caused a decline in organism biodiversity. The purposes of this study were to assess the quality of Segara Anakan by valuating the...

Heavy metals such as Zinc (Zn) in batik wastewater may be reduced with biosorption. Sargassum cinereum and rhizobacteria may be used as a biosorbent as they are cheap, abundant, and easily obtainable. The process of biosorption depends on a biosorbent surface area. A large biosorbent surface area can be made by modifying a tea bag. This study aims...

There was a unique brackish water ecosystem and affected a chance in the plankton composition at lagoon and riverside in Segara Anakan Cilacap. This study aimed to map phytoplankton and zooplankton composition consisting of freshwater and marine plankton from the lagoon to the marine entrance in the west part of Segara Anakan Cilacap. The survey me...

Microphytobenthic benthic plants, found in the waters of the sunlight reaching the bottom waters. In addition to acting as a primary producer also has the potential to produce renewable biofuels The purpose of this study was to determine the microphytobenthic abundance of river Pekacangan affected tapioca liquid industrial waste and to estimate its...

INCREASING PRODUCTION OF SEAWEED GRACILARIA GIGAS USING MODIFIED NET SYSTEM (CASE STUDY: IN NUSAKAMBANGAN WATERS, CILACAP). Production of seaweed (Gracilaria gigas) depends on cultivation system and environmental factors. In order to know the growth and production state of G. gigas, different cultivation systems were used to find out which system t...

Microalga Navicula sp., Spirulina platensis, and Chlorella vulgaris have the prospect of being a source of biofuel producers. Rapid cell growth, coupled with the ability to produce large lipids and less pollution, can be used as an alternative to biofuel development. Microalgae cultivation can utilize tapioca liquid waste. Addition of NaCl to regul...

Amalah N, Widyartini DS, Christiani, Hidayah HP. 2018. The effect of dilution level of liquid tapioca waste culture medium and concentration of phosphate on the growth of microalgae Navicula sp.. Nusantara Bioscience 10: 64-68. Liquid tapioca waste can be used as microalgae culture medium due to its nutrient contents that can support the life of mi...

Agardh has characteristic of highly polymorphic thalli among individuals in its population. The shape and size of thalli are variable among the individuals. The study was aimed at knowing the variation of S. polycystum thalli grown in different beaches of Central Java. The data showed that the thalli of the S. polycystum grown in the Karimunjawa ha...

ABSTRAK Spirulina platensis merupakan mikroalga yang berpotensi sebagai penghasil tepung PST (protein sel tunggal). Kandungan protein mikroalga sangat tinggi, dapat mencapai 70% dari berat keringnya. Tepung berprotein tinggi sangat dibutuhkan untuk kebutuhan pangan dan pakan Untuk meningkatkan produksi gel, dalam pengembangan dapat menerapkan berba...

ABSTRAK Sumberdaya alginat berkelanjutan sangat diperlukan mengingat senyawa ini keberadaannya sangat dibutuhkan dalam berbagai industri. Pertumbuhan dan produksi rumput laut Sargassum polycystum dapat ditingkatkan dengan penerapan modivikasi metode budidaya yang tepat, selain dipengaruhi faktor lingkungan perairan. Intensitas cahaya rendah pada me...

Sargassum polycystum is one of seaweed what be able to produce alginate. Cultivation development intensively use common cultivation methods and planting age of growth season properly which can be able to produce good growth and highest alginate. This study is used an experimental method. The basic design used for the content of alginate S. polycyst...

Seaweed naturally grows in substrate of sand, mixing between sand, mud and shell fragments, and also coral. Previous researches stated that there were types of seaweed that able to grow in more than one substrates. The aims of this research was to know the community structure such as diversity, domination, evenness, and similarity of seaweed on var...

Chlorophyta is autotroph organisms which has an important role in fresh waters as one of the largest algae division. This study aimed to determine the abundance and similarity structure of Chlorophyta in Tilapia culture media which was given fermented feed with the addition of cassava peel flour and MEP+ probiotic. This study used four treatments w...

Chrysophyta is also known as golden-yellow algae because of the yellow dominant pigment of carotene and xanthophyll. This study aimed to determine species richness and abundance of Chrysophyta in the Tilapia culture media which was fed with the addition of cassava peel flour and probiotic. The method applied in this study was the experimental metho...

A new species of Anadendrum ellipticum Widyartini & Widjaja, collected from Malay Peninsula, Kalimantan, North Sulawesi and Java proposed. This species is closely related with A. microstachyum but it differs on the structure of leaves, perianth and filament.