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All Journal BULETIN OSEANOGRAFI MARINA Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology Jurnal Pasir Laut Management of Aquatic Resources Journal (Maquares) AL KAUNIYAH Jurnal Kelautan Tropis JFMR (Journal of Fisheries and Marine Research) Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology Jurnal Laut Khatulistiwa Biosaintifika: Journal of Biology & Biology Education Sains Akuakultur Tropis : Indonesian Journal of Tropical Aquaculture Makara Journal of Technology Proceedings Series of Educational Studies
DIAH AYUNINGRUM
Program Studi Manajemen Sumberdaya Perairan, Departemen Sumberdaya Akuatik Fakultas Perikanan Dan Ilmu Kelautan, Universitas Diponegoro
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mechanical Engineering Physics

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Variasi Konsentrasi Nutrien dan Dampaknya terhadap Kelimpahan Fitoplankton di Perairan Teluk Semarang Jati, Oktavianto Eko; Afiati, Norma; Purnomo, Pujiono Wahyu; Ayuningrum, Diah; Dewi, Desca Estiyani
Jurnal Laut Khatulistiwa Vol. 9 No. 1 (2026): February
Publisher : Dept. Marine Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/lkuntan.v9i1.104265

Abstract

Phytoplankton are important microorganisms in water ecosystems. They help in the nutrient cycle. Nutrients in water affect how many and what types of phytoplankton are present. This also impacts the fertility of coastal waters like Semarang Bay, which are influenced by human activities. This study looks at the link between water nutrients, phytoplankton, and water fertility. The study used a descriptive, quantitative method on November 10, 2024, at 6 chosen locations. Measurements taken on-site included DO, temperature, salinity, pH, and transparency. Lab tests looked at phytoplankton types, chlorophyll-a, silica, nitrate, nitrite, orthophosphate, and TSS using SNI and APHA methods. The main phytoplankton types were Diatoms, Dinoflagellates, and Cyanobacteria (26 types), with Chaetoceros being the most common (1,598 cells/L). Bacteriastrum and Chaetoceros were seen most often. Environmental data showed temperatures from 29.2–33.3°C, pH 8.6–8.8, DO 5.3–7.3 mg/L, salinity 32–33‰, and water clarity 0.55–5.97 m; chlorophyll-a 1.55–8.85 µg/L. TSS levels were 18.58–38.94 mg/L, nitrate 1.3–1.9 mg/L, nitrite 0.01–0.02 mg/L, and phosphate 0.8 mg/L, with the highest silica at Station 4. PCA analysis showed a productivity pattern (PC1) that was positively associated with chlorophyll-a, phytoplankton numbers, silica, and dominance, but negatively associated with TSS, nitrate–nitrite, and transparency. This means silica helps diatom growth, while high TSS can reduce productivity by blocking light, even though it might bring nutrients.
Academic Stress Among First-Year Guidance and Counseling Students: A Descriptive Survey of Its Key Manifestations Zakiyya Az-Zahro; Diah Ayuningrum; Vindi Wahyu Novitasari; Sohmon Ranja Capah; Annora Farrel Fawwazi
Proceedings Series of Educational Studies 2026: International Conference on Educational Management and Technology (5th ICEMT 2026)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Academic stress is a critical issue among first-year undergraduate students, as the transition to higher education demands adjustment to new learning patterns, academic workloads, and performance standards. This study aims to describe the level of academic stress among first-year Guidance and Counseling students and its distribution based on indicators of academic stress manifestations. A quantitative approach with a descriptive survey design was employed. The study population comprised 198 students, with 115 respondents selected through simple random sampling. Data were collected cross-sectionally using an instrument covering five indicators: pressure from study, workload, worry about grade, self-expectation, and despondency, and were subsequently analyzed using descriptive statistics. The findings revealed that 55.5% of respondents experienced moderate academic stress, 29.5% experienced high stress, and 14.8% fell into the low category. Overall, 85% of respondents experienced moderate-to-high levels of academic stress. When analyzed by individual indicators, the highest proportion of students experiencing high academic stress was found in worry about grade (33.9%), followed by self-expectation (31.3%) and workload (29.6%). These findings underscore the need for early assessment and the development of sustainable Guidance and Counseling services to strengthen first-year students' adaptability and academic stress management skills.
Co-Authors Agus Hartoko Agus Sabdono Amanina, Farha Tsabita Anhar Solichin Aninditia Sabdaningsih Annora Farrel Fawwazi Arif Rahman Bahry, Muhammad Syaifudien Bangun, M. Fadhillah Rasyid Beginer Subhan Clara, Jessika Oktaviani David Nugroho Dewi, Desca Estiyani Diva Triza Novitasari Fadhila, Zalfa Langgeng Fahlevi, Arief Reza Febrianto, Sigit Fenetiruma, Syamsudin Frida Purwanti Haeruddin Haeruddin Haryani, Nisrina Septi Herettrenggi, Rosa Jessika Oktaviani Clara Junaedy, Ahmad Kintani, Novia Indah Kusumarani, Dheni Lazuardhi, Risqi Lundin, Kennet Malaihollo, Jantje Jacobus Max Rudolf Muskananfola Muttaqin, Ahmad Sabilul Niniek Widyorini Norma Afiati Novitasari, Diva Triza Nur Handayani Nur Hidayah Nurhuda, Izza Siti Ocky Karna Radjasa Oktavianto Eko Jati Prehadi, Prehadi Pujiono Wahyu Purnomo Pujiono Wahyu Purnomo Rahayu, Sari Sistyawati Rakhim, Lutfi Nur Ratna Diyah Palupi Raunsai, Jhoni Elias Raweyai, Oktofianus Obaja Rizaldi, Rahmat Rosa Amalia Rosari, Arinda Rudolf Muskananfola, Max Santoso Budi Widiarto Sianturi, Yenti Agustina Sohmon Ranja Capah Sombo, Hendrik Suradi Wijaya Saputra Suradi Wijaya Saputra Suryanti Taufani, Wiwiet Teguh Utari, Erni Dwi Vindi Wahyu Novitasari Wiwiet Teguh Taufani Yustina, Nurul Zakiyya Az-Zahro Zebua, Vanda Florist Zulfana Fikru Sifa