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RELATIONSHIP BETWEEN PRIMARY PRODUCTIVITY OF PHYTOPLANKTON AND NUTRIENTS IN COASTAL WATERS, PELINTUNG VILLAGE, MEDANG KAMPAI DUMAI DISTRICT Pebriyanti, Salfiah; Badrun, Yeeri; Herlina, Nofripa
Asian Journal of Aquatic Sciences Vol. 6 No. 2 (2023): August
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

This study is to determine the relationship between primary productivity and nutrients in the coastal waters of Pelintung Village, Medang Kampai District, Dumai. The research was conducted in March 2022; the method used in this research is survey method and purposive sampling. The research location is divided into 3 station points namely tourist area, secondary vegetation forest area, and near industrial area. The results of the measurement of the highest primary productivity value are found at Station III which is 78.91 mgC/m2/hour which indicates mesotrophic water conditions, while the lowest primary productivity value is at Station II, which is 46.88 mgC/m2/hour which indicates oligotrophic water conditions. The results of the analysis of the concentration of nitrate and phosphate between stations also varied, namely for the nitrate value of 0.04 – 0.05 mg/L which was included in the less fertile category, while the phosphate concentration was 0.042 – 0.048 mg/L which was included in the fertile category in the waters. Furthermore, the relationship between nitrate concentration and primary productivity is a correlation coefficient value (r) = -0.070 which means that there is a weak relationship between nitrate concentration and primary productivity. Meanwhile, the relationship between phosphate concentration and primary productivity is the correlation coefficient (r) = 0.965, which means that there is a very strong relationship between phosphate concentration and primary productivity. So it can be concluded that nitrate and phosphate nutrients can affect the primary productivity of water.
PENGARUH PERBEDAAN UKURAN KOTAK SARANG TERHADAP VOLUME MADU DAN BERAT POLEN LEBAH TANPA SENGAT (Heterotrigona Itama) DALAM PERIODE PENGAMATAN SATU BULAN DI HUTAN ADAT IMBO PUTUI, KABUPATEN KAMPAR Fitriani, Aisyah; Gesriantuti, Novia; Herlina, Nofripa; Syarif, Nuskan; Tas’ad, Said Faizan
BIOTIKA Jurnal Ilmiah Biologi Vol 23, No 2 (2025): BIOTIKA DESEMBER 2025
Publisher : Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/biotika.v23i2.66239

Abstract

Lebah tanpa sengat (Heterotrigona itama) dapat menghasilkan produk berupa madu, polen, propolis, dan royal jelly. Lebah tanpa sengat jenis ini banyak dibudidayakan karena kemudahan dalam mengelolanya, ketersediaan di alam yang masih banyak, dan produksi madunya yang lebih tinggi dibanding jenis lain. Teknik budidaya yang digunakan dapat menggunakan kota sarang sebagai sarangnya. Penelitian ini bertujuan untuk mengetahui volume madu dan berat polen lebah tanpa sengat (Heterotrigona itama) berdasarkan perbedaan ukuran kotak sarang yang tersedia dengan penerapan sistem topping di Hutan Adat Imbo Putui, serta jumlah pot madu dan pot polen yang dihasilkan. Metode penelitian yang digunakan adalah survei dan pengamatan langsung, dengan analisis deskriptif kuantitatif. Hasil penelitian menunjukkan bahwa ukuran kotak sarang 40 × 35 × 10 cm menghasilkan volume madu tertinggi sebesar 126,67 ml dan berat polen
PENGARUH PERBANDINGAN AMPAS KOPI DAN PUPUK KANDANG TERHADAP PERTUMBUHAN TANAMAN CABAI MERAH (Capsicum annuum L.) Mardatillah, Annisa; Herlina, Nofripa; Irma, Wirdati Irma
EduNaturalia: Jurnal Biologi dan Kependidikan Biologi Vol. 7 No. 1 (2026)
Publisher : FKIP Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/edunaturalia.v7i1.97994

Abstract

Red chili (Capsicum annuum L.) is one of Indonesia’s major horticultural commodities with high economic value and an essential role in national food security. Farmers’ dependence on chemical fertilizers in the long term can reduce soil fertility and cause environmental pollution; therefore, environmentally friendly and cost-effective organic fertilizer alternatives are needed. This study aimed to analyze the effect of coffee grounds and manure ratio on the growth of red chili plants and to determine the optimal combination that supports the best vegetative performance. The research was conducted as a field experiment using a Completely Randomized Design (CRD) consisting of six treatments with three replications, namely combinations of coffee grounds and manure (P1 = 50:0 g; P2 = 40:10 g; P3 = 30:20 g; P4 = 0:20 g; P5 = 5:15 g; P6 = 10:10 g). Growth parameters observed included plant height and number of leaves, measured weekly for four weeks. Data were analyzed using the Kruskal–Wallis test followed by the Mann–Whitney test. The results showed that the combination of 30 g coffee grounds and 20 g manure (P3) produced the highest plant height, while 40 g coffee grounds and 10 g manure (P2) resulted in the greatest number of leaves. A balanced ratio of coffee grounds and manure improved soil structure and nutrient availability, thus supporting optimal vegetative growth of red chili plants.
Pollen Foraging Activity of Stingless Bee (Heterotrigona itama) in Managed Colonies at the Adat Imbo Putui Forest (AIPF), Kampar Regency Albana F. Akbar; Novia Gesriantuti; Nofripa Herlina; Nuskan Starif; Said F. Tas’ad
Jurnal Biologi Papua Vol 17 No 2 (2025)
Publisher : Jurusan Biologi FMIPA Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31957/jbp.4107

Abstract

Stingless bees are commonly found in Indonesia, either living naturally or managed in cultivation systems. The main factor determining the success of stingless bee farming is the availability and abundance of plants as food sources. This study aimed to determine the number and timing of foraging activities of stingless bees (Heterotrigona itama) for pollen, the influence of environmental factors on the foraging activities of H. itama for pollen, and the types of plants that have the potential to serve as pollen sources. The foraging activity of H. itama was directly observed from 06:00 to 18:00. The environmental parameters measured included temperature, humidity, and light intensity. The survey of potential pollen source plants was conducted around the managed colony boxes and within a 200-meter radius from the colony boxes. The results showed that H. itama foraging activity peaked at 11:00 (bees leaving the nest), 10:00 (bees returning to the nest without carrying pollen), and 11:00 (bees returning with pollen). Spearman correlation analysis indicated that pollen foraging activity was influenced by light intensity. The potential for pollen source plants around the study site was relatively abundant, with 37 plant species identified. 
Strategi Pemulihan Ketahanan Pangan Pascabencana Melalui Hortikultura dan Hidroponik di Pekarangan Rumah Mualfah, Desti; Herlina, Nofripa; Fitriana, Nur; Wati, Anisa Dwi Sanggar
Jurnal Pengabdian UntukMu NegeRI Vol. 10 No. 1 (2026): Pengabdian Untuk Mu negeRI
Publisher : LPPM UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jpumri.v10i1.11257

Abstract

Agam Regency, West Sumatra, is an area with a high level of vulnerability to hydrometeorological disasters, including flash floods that have an impact on reducing household food security. After the disaster, the community of Sungai Batang Village faced limited access to healthy food, damaged agricultural land, and low utilization of yards as alternative food sources. This community service activity aims to improve household food security through the utilization of backyard horticulture and simple hydroponics based on community empowerment. The methods used were participatory and collaborative approaches through the stages of socialization, initial identification and assessment, participatory planning, technical training, application of horticulture and hydroponics technology, assistance and monitoring, and activity evaluation. The results of the activity showed an increase in community skills in vegetable cultivation, as well as an increase in productive home gardens and active hydroponics units. This program also strengthened the social participation of the Dasawisma and Karang Taruna groups and encouraged household-scale economic independence. Thus, the simple yard horticulture and hydroponic model is the most appropriate solution as a strategy for restoring food security after a disaster.