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Assessment of Microalgal Biodiversity as Bioindicator of Aquatic Ecosystem Health in Kombal Bay, Lombok Island, Indonesia Jayanti*, Ervina Titi; Purwati, Nining; Ihsan, Muhsinul
Jurnal IPA & Pembelajaran IPA Vol 9, No 3 (2025): SEPTEMBER 2025
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jipi.v9i3.48310

A good aquatic environment will ensure the availability of clean water, prevent the spread of disease, and support the balance of marine and freshwater ecosystems. Determination of the health status of aquatic environments can use various chemical, physical, and biological parameters. Microalgae are commonly used as bioindicators of changes in the environmental quality of aquatic ecosystems because they have high sensitivity to chemical and physical changes that enter the water. One of the areas with high ecological and economic potential in Indonesia is Kombal Bay, located on Lombok Island, West Nusa Tenggara. This study aims to determine the health level of the Kombal Bay freshwater ecosystem using microalgae as bioindicators. This study is a descriptive exploratory study with qualitative and quantitative approaches. Microalgae determination uses the Algaebase online database guide, diversity analysis uses the Shannon-Wiener diversity index (H) and the evenness index (E). The results showed that there were 23 types of microalgae, the majority of which were members of Bacillariophyta, the diversity of the microalgae community was classified as moderate (H=1.37) with an uneven distribution of species (E=0.43). The combination of these various parameters indicates that the waters of Kombal Bay are lightly to moderately polluted and are starting to show ecological pressure

Studi Etnobotani: Pemanfaatan Tumbuhan dalam Upacara Adat Barodak Rapancar Pra-Khitan di Suku Samawa Hastiwi, Marsani Dwi; Purwati, Nining
Al Kawnu : Science and Local Wisdom Journal Vol. 5 No. 1 (2025): Oktober 2025
Publisher : Tadris Biologi, Tadris Fisika, and Tadris Kimia, Universitas Islam Negeri Antasari

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18592/ak.v5i1.16737

Upacara adat Barodak Rapancar merupakan salah satu upacara yang dilakukan sebelum prosesi khitan anak laki-laki. Dalam upacara ini digunakan berbagai jenis tumbuhan yang memiliki makna simbolis maupun fungsional. Penelitian ini bertujuan untuk mengetahui jenis-jenis tumbuhan yang dimanfaatkan dalam upacara adat Barodak Rapancar. Jenis penelitian ini adalah kualitatif. Teknik pengumpulan data dilakukan melalui wawancara semi-terstruktur (semi-Structured interview) dengan 3 informan dari masyarakat di desa tersebut yang pernah terlibat langsung dalam upacara Barodak Rapancar. Hasil penelitian menunjukkan bahwa terdapat 6 famili yaitu Musaceae, Aracaceae, Poaceae, Piperaceae, Lythraceae, dan Rubiaceae dengan 8 spesies diantaranya Musa paradisiaca, Cocos nucifera L., Saccharum officinarum L., Oryza sativa L., Piper betle, , Impatients balsamina L., Areca catechu L., dan Uncaria gambir.

The Characteristics of Chitosan Derived from Lobster Shells and its Effect on Fungi Activity and Water Stability of Lobster Pellets Ihsan, Muhsinul; Harris, Ali; Mukminah; Megawati; Purwati, Nining; Muliasari, Handa; Priyambodo, Bayu; Jones, Clive; Nankervis, Leo
Jurnal Ilmiah Perikanan dan Kelautan Vol. 17 No. 2 (2025): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v17i2.57474

Graphical Abstract Highlights of Research The chitosan was successfully produced from lobster shells Panulirus homarus. The characteristics and quality of chitosan from lobster shells Panulirus homarus were observed. The anti-fungal activity of chitosan was assessed. Chitosan enhances the water stability of lobster pellets. Abstract Tropical rock lobster aquaculture is a lucrative industry that is currently limited by the lack of appropriate formulated feed. Its nocturnal, benthic feeding behavior necessitates a water-stable feed that maintains integrity under tropical marine conditions without degrading. Chitosan, a biopolymer derived from lobster (Panulirus homarus) shells, has potential applications in aquaculture as an antifungal agent and feed binder. We report on the characteristics of chitosan extracted from the exoskeleton of spiny lobsters (Panulirus homarus), including its effect on fungal activity and water stability of pellets. Chitosan was produced through three main steps: deproteination, demineralization, and deacetylation. The resulting chitosan was characterized through crude composition (AOAC methods), FTIR spectra, and scanning electron microscope (SEM), while antifungal activity was assessed through in vitro assays. Chitosan was used to coat lobster feed pellets by immersion method at different concentrations (0%, 0,5%, 1%, 1,5%, and 2%), and its impact on pellet water stability was assessed. There were three replications in fungal activity and water stability test. The yield of chitosan was 5.9 ± 0.01% of the total shell mass, with 96.99% ± 0.01 degree of deacetylation (DD). The resulting product contained 5.94 ± 0.07% moisture, 36.72 ± 0.05% ash and 2.73 ± 0.08% nitrogen. Chitosan morphology was characterized as an irregular shape with dimensions ranging from 157 to 391 µm, with a combination of striated surface textures. Increasing concentration of chitosan increased water stability of pellets up to 1.5% inclusion, while 0.5% optimized Fusarium sp. inhibition. These findings suggest that chitosan from lobster shells can be sustainably utilized to enhance feed quality, reducing fungal contamination and nutrient leaching in aquaculture systems.

Pengaruh Strategi Active Learning Tipe Index Card Match terhadap Hasil Belajar Peserta Didik pada Pembelajaran Tematik Terpadu Kelas III Sekolah Dasar Purwati, Nining; Yunisrul, Yunisrul
e-Jurnal Inovasi Pembelajaran Sekolah Dasar Vol 10, No 1 (2022): (Januari-April) e-JIPSD
Publisher : Universitas Negeri Padang

This study aims to determine the effect of the index card match type active learning strategy on student learning outcomes in integrated thematic learning. This type of research is quasi-experimental with nonequivalent control group design. The research was conducted in 02 Balai Nan Duo in Payakumbuh. The sampling technique is simple random sampling, which is selected as the sample class is class IIIC as the experimental class and class IIIA as the control class. Sampling is using purporsive sampling technique. The instrument used to collecting data in this research is objevtive test with multiple choice form. Based on the results of data analysis using t-test, obtained tcount = (2,92) > ttabel (1,69) at a significant level of 0.05. It means that tcount > ttable, so H1 is accepted. Thus, there is a significant effect of index card macth type active learning strategy on the learning outcomes of integrated thematic in class III of Elementary School.

Hubungan Fenomena Deforestasi dengan Penurunan Populasi Rusa Timor (Cervus timorensis) dan Pentingnya Pendidikan Konservasi bagi Masyarakat di Pulau Lombok Zulfaeda, Aulia; Efendi, M. Harja; Purwati, Nining
Bioscientist : Jurnal Ilmiah Biologi Vol. 12 No. 1 (2024): June
Publisher : Department of Biology Education, FSTT, Mandalika University of Education, Indonesia.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/bioscientist.v12i1.11409

There is an endemic animal in West Nusa Tenggara namely the Timor Deer (Cervus timorensis). However, the population has decreased over time, and the Timor deer species is categorized as an endangered species by the IUCN. The decline of the Timor Deer population in Lombok island is due to lose its natural habitat in the forest. And one of the causes that is deforestation. Deforestation is the conversion of forests into land for use, such as clearing land for agriculture and plantations. Therefore, to maintain the Timor Deer population in Lombok island, it is also important to balance it with providing knowledge about conservation to the community through conservation education. This research aims to analyze the relationship between the deforestation phenomenon and the decline of the Timor Deer population and the importance of conservation education for the community in Lombok island, West Nusa Tenggara. Using a systematic literature review method by collecting data and literature from several journals. The results show that there is a relationship between the deforestation phenomenon and the decline of the Timor Deer population in Lombok and the importance of conservation education to the community to increase public awareness to protect endemic animals.

Analisis Kandungan Merkuri dalam Sedimen dan Keong Sawah (Pila Ampullacea Linn.) Danau Lebo Sumbawa Barat Nabila, Riska; Purwati, Nining; Jayanti, Ervina Titi
Jurnal Sains dan Teknologi Lingkungan Vol. 16 No. 1 (2024): SAINS & TEKNOLOGI LINGKUNGAN
Publisher : Teknik Lingkungan Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/jstl.vol16.iss1.art4

Traditional gold mining around Lake Lebo has a positive impact on people's income, but it has a negative impact on the waters of Lake Lebo. This is evidenced by a 2016 study conducted on 2016 that reported mercury pollution in the sediments and fish of Lake Lebo. The objective of this study is to determine the mercury content in the sediments of Lake Lebo, West Sumbawa. The sampling employed purposive sampling with four research stations based on their utilization around Lake Lebo. The mercury content in the samples was tested using an AAS (Atomic Absorption Spectrophotometer). The sediments of Lake Lebo Meraran contain 0.70 ppm of mercury (lightly polluted). The Meraran Paddy Field Sediment contains 0.31 ppm of mercury (tolerable). The sediments of Lake Lebo Seloto contain 0.22 ppm of mercury (normal). The mercury content in Lake Lebo Rice Snails is less than 0.0001 (undetectable), making them safe for public consumption. Several factors contribute to the undetected mercury in the samples, namely rainfall, floods, waste storage, and phytoremediation by aquatic plants.

The Effect of Taro Starch (Colocasia esculenta L Schoott) Edible Coating on the Quality of Red Chili (Capsicum annuum L) Purwati, Nining; Jayanti, Ervina Titi; Ariska, Wiwik
Jurnal Penelitian Pendidikan IPA Vol 10 No 2 (2024): February
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i2.4078

Edible coating is a barrier, thin layer of consumable material to maintain moisture and slow down the respiration process of a product. In order to preserve the quality of red chili, this study aims to find the ideal taro starch concentration to use as an edible covering. Six treatments of taro starch concentrationâ€”0, 1, 2, 3, 4, and 5%â€”were used in experimental research utilizing a completely randomized design (CRD). Hedonic organoleptic testing produced the data. Analysis of variance (ANOVA) is then performed based on the level of panelist preference, and an LSD test is applied if there is a significant difference. The findings indicated that a 5% concentration of taro starch works best as an edible covering material to preserve the quality of red chili

Pengaruh Strategi Active Learning Tipe Index Card Match terhadap Hasil Belajar Peserta Didik pada Pembelajaran Tematik Terpadu Kelas III Sekolah Dasar Purwati, Nining; Yunisrul, Yunisrul
e-Jurnal Inovasi Pembelajaran Sekolah Dasar Vol 10, No 1 (2022): (Januari-April) e-JIPSD
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/e-jipsd.v10i1.10346

This study aims to determine the effect of the index card match type active learning strategy on student learning outcomes in integrated thematic learning. This type of research is quasi-experimental with nonequivalent control group design. The research was conducted in 02 Balai Nan Duo in Payakumbuh. The sampling technique is simple random sampling, which is selected as the sample class is class IIIC as the experimental class and class IIIA as the control class. Sampling is using purporsive sampling technique. The instrument used to collecting data in this research is objevtive test with multiple choice form. Based on the results of data analysis using t-test, obtained tcount = (2,92) > ttabel (1,69) at a significant level of 0.05. It means that tcount > ttable, so H1 is accepted. Thus, there is a significant effect of index card macth type active learning strategy on the learning outcomes of integrated thematic in class III of Elementary School.

Etnobotani Pengobatan Tradisional: Studi Pemanfaatan Tumbuhan Obat Oleh Masyarakat Tolotongga, Kota Bima, Nusa Tenggara Barat Hafidzah, Ditiyyah; Purwati, Nining
Filogeni: Jurnal Mahasiswa Biologi Vol 5 No 3 (2025): September-Desember
Publisher : Program Studi Biologi Fakultas Sains dan Teknologi Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/filogeni.v5i3.57450

Etnobotani merupakan cabang ilmu biologi yang berkaitan dengan hubungan antara manusia dengan tumbuhan yang terdapat di sekitar. Tumbuhan obat mempunyai khasiat sebagai obat, baik yang diperoleh secara liar ataupun dibudidaya. Tumbuhan obat dimanfaatkan oleh masyarakat untuk diracik dan diramu guna untuk menyembuhkan penyakit. Penelitian ini dilakukan dengan tujuan ntuk mengetahui dan mengidentifikasi jenis tumbuhan yang digunakan sebagai obat untuk menyembuhkan penyakit oleh masyarakat Tolotongga, Kota Bima. Metode yang digunakan ialah deskriptif kualitatif dengan dilakukan wawancara pada beberapa masyarakat Tolotongga terpilih yang sering mengolah dan menggunakan tanaman obat untuk mengobati berbagai penyakit. Hasil penelitian ini menunjukkan bahwa di Tolotongga terdapat 16 spesies tumbuhan obat yang sering digunakan oleh masyarakat untuk mengobati berbagai penyakit tertentu. Adapun bagian tumbuhan yang sering digunakan ialah rimpang, daun, bunga, umbi, getah, buah dan batang. Pelestarian pengetahuan etnobotani ini sangat penting untuk dilakukan sebagai bagian dari menjaga kearifan lokal dan potensi sumber daya alam di daerah tersebut.

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