Ekologia: Jurnal Ilmiah Ilmu Dasar dan Lingkungan Hidup

KANDUNGAN TOTAL FENOL DAN UJI AKTIVITAS ANTIOKSIDAN RUMPUT LAUT COKLAT Sargassum polycystum, Padina australis DAN Turbinaria conoides DARI PANTAI SAYANG HEULANG

Prasetyorini, Nurfachma Ilmana Dewi Sajidin, Diana Widiastuti — Wed, 29 Apr 2026 00:00:00 +0000

Antioxidants are needed by the body to overcome and prevent oxidative stress. Various natural ingredients native to Indonesia contain lots of antioxidants with various active ingredients, one of which is brown seaweed, namely Sargassum polycystum, Padina Australis and Turbinaria conoides. Brown seaweed contains secondary metabolites that are beneficial to health, namely alkaloids, terpenoids, steroids, tannins, saponins, and glycosides which are included in the drug and pharmaceutical industry. Phenolic compounds in brown algae have structural components that are inseparable from the cell wall and have various protective functions from UV radiation, which play a role in algae and protection against biotic factors and have therapeutic properties. The aim of this study was to determine the total phenolic content and antioxidant activity of brown seaweed Sargassum polycystum, Padina australis and Turbinaria conoides from Sayang Heulang Beach. Determination of phenolic levels was carried out using the Follin-ciocalteu method and antioxidant activity testing using the 2,2-Diphenyl-1-Pikrilhidrazil (DPPH) method. Based on the research that has been done, it can be stated that the total phenolic content of the powder Sarggassum polycystum, Padina australis and Turbinaria conoides are 3.04, 0.98 and 3.24 mg SAG / g, respectively. While the antioxidant levels have IC50 of 823.71, 417.10 and 320.07 ppm.

Keywords: Antioxydant, Padina australis, Sargassum polycystum, Turbinaria conoides

POPULASI ANGGREK ENDEMIK Tainia elongata J.J.Sm DI KAWASAN TAMAN WISATA ALAM SITU GUNUNG, SUKABUMI

Ismano, Wahyu Saputra — Wed, 29 Apr 2026 00:00:00 +0000

Tainia elongata is one of several endemic orchids found in Java. This terrestrial orchid grows in the mountainous forests of Java up to 1,400 meters above sea level. Its wild population is still largely unknown. The Situ Gunung Nature Tourism Park area is a natural tropical rainforest mountain ecosystem with a diversity of protected flora and fauna. Data collection on the Tainia elongata J.J.Sm orchid population and supporting data was carried out using the line transect method and sample plots by dividing it into 3 locations, namely location A at an altitude of 1024 - 1027 m asl, location B at an altitude of 1031 - 1036 m asl, and location C at an altitude of 1042 - 1166 m asl. From the 3 sampling locations, 23 individuals of Tainia elongata, J.J.Sm. orchids were found. At location A, with a population value of 0.002/m2, 75% humidity, air temperature of 220C, soil pH of 6.9, the few individuals found were influenced by the dominance of ferns. Location B had 73% humidity, an air temperature of 220C, soil pH of 7, and no orchids were found due to high human activity. The third data collection location is location C with a population of Tainia elongata orchids, J.J.Sm 0.024/m2 with an air temperature of 210 C, humidity of 80%, and soil pH of 6.9. The high humidity at location C resulted in the large number of individuals found, and the orchid habitat at this location is still maintained.

Keywords: Endemic, Population, Tainia elongata

PENDUGAAN CADANGAN KARBON PADA TAMAN HUTAN KOTA BOGOR

Shinta Fitria Ovianti , Srie Rahayu — Wed, 29 Apr 2026 00:00:00 +0000

Climate change driven by increasing carbon dioxide (CO₂) emissions necessitates mitigation efforts, including the utilization of urban green spaces. This study aims to estimate tree volume, biomass content, and carbon stock in four urban forest parks located in the City of Bogor: Taman Peranginan, Taman Heulang, Taman Kencana, and Taman Ekspresi Sempur. Field data were collected through direct measurement of tree diameter at breast height (DBH), tree height, species identification, and wood density estimation. Tree volume was calculated using a cylindrical approximation formula, biomass was estimated using the allometric model of Chave et al. (2014), and carbon stock was derived assuming that 47% of dry biomass constitutes carbon, based on IPCC 2019 guidelines. The results indicate that Taman Heulang has the highest carbon stock at 275 tons, followed by Taman Kencana (220.8 tons), Taman Peranginan (220 tons), and Taman Ekspresi Sempur (195 tons). Tree volume and carbon stock were significantly influenced by DBH, height, wood density, and species composition. Heavy-wooded species such as Mahogany (Swietenia mahagoni), Banyan (Ficus benjamina), and Teak (Tectona grandis) stored the largest amounts of carbon. Parks with higher species diversity and larger-diameter trees demonstrated greater carbon storage capacity. This study confirms that urban forest parks play a significant role in climate change mitigation and should be managed according to sustainable ecological principles.

Keywords: Carbon Stock, Urban Forest Park, Bogor.

PENGARUH PEMBERIAN EKSTRAK UMBI BIT (Beta vulgaris L.) TERHADAP GAMBARAN DARAH AYAM BROILER STRES TRANSPORTASI

Febriana Baharsah, Triastinurmiatiningsih, Wahyu Prihatini — Wed, 29 Apr 2026 00:00:00 +0000

Transportation or transportation of animals from one place to another can cause stress or stress. To reduce stress, animals must have high stamina or endurance. This research was conducted to obtain an overview of chicken blood under transportation stress by administering beetroot extract and to determine the optimal concentration of beetroot extract in stabilizing chicken blood when experiencing transportation stress. This study used a randomized block design consisting of 0.1 g/W, 0.5g/W, 1g/W and placebo. The experimental animals used were 15 broiler chickens weighing between 1.5 – 1.7 kg with a CV value of 5.31%. The results of this study indicate that beetroot extract can stabilize the value of hematocrit, hemoglobin and white blood granules in broiler chickens subjected to transportation stress and the concentration of beetroot extract at a concentration of 0.1 g/BW to stabilize the value of hematocrit, hemoglobin and white blood count in broiler chickens. broiler chickens under transportation stress.

Keywords: Broiler chicken, Beetroot, Transportation stres

UJI AKTIVITAS EKSTRAK Chondrus sp SEBAGAI ANTIBAKTERI Escherichia coli

Yunus, Tri Saptari Haryani, Fitria Dewi Sulistiyono — Wed, 29 Apr 2026 00:00:00 +0000

Escherichia coli is a bacterium that causes diarrheal diseases or gastrointestinal infections in humans that often occur in various geographies of the world. One of the treatments of bacterial infections is the use of antibiotics. Antibiotics can stop the growth or kill the bacteria that cause the infection. Bacterial resistance to antibiotics is a problem that can occur due to the unwise and rational use of antibiotics. The purpose of this study was to analyze the antibacterial activity of 96% ethanol extract of Chondrus sp. against the growth of Escherichia coli, which is one of the causes of diarrhea. Antibacterial testing of Chondrus sp. ethanol extract begins with the MIC (Minimum Inhibitory Concentration) Test through the agar dilution method and antibacterial test using the Disc Diffusion method by measuring the Width of Inhibition. MIC test of Chondrus sp. ethanol extract with concentrations of 10%, 20%, 30%, 40%, and 50%. Meanwhile, the Inhibitory Power Width Test was carried out on concentrations of 50%, 60%, and 70%. Control negatif using sterile aqueous and positive control using Amoxicillin 10 mg/L. The results of the antibacterial test at a concentration of 70% showed the greatest activity, namely 8.25 mm in inhibiting the growth of Escherichia coli compared to other concentrations. The results showed that Chondrus sp. extract has secondary metabolites that can inhibit the growth of Escherichia coli bacteria. MIC test of 96% ethanol extract of Chondrus sp. against the growth of Escherichia coli is at a concentration of 50%. Meanwhile, the results of antibacterial tests at a concentration of 70% showed the greatest activity in inhibiting the growth of Escherichia coli compared.

Keyword: Antibacterial, Chondrus sp, Escherichia coli

KEANEKARAGAMAN JENIS-JENIS TUMBUHAN ANGIOSPERMAE PADA RUANG TERBUKA HIJAU DI KOTA BOGOR

Cecep Sudrajat, Eva Zulhulaeva — Wed, 29 Apr 2026 00:00:00 +0000

Plant diversity is very important for green open spaces including regulating city temperature, regulating oxygen content, reducing carbon dioxide, and increasing water catchment areas. The aim is to count the types of angiosperms in Bogor City Park and calculate Density, Frequency, Dominance and Index of Important Value (INP), and diversity index. The method used is the exploratory method, exploring and observing directly the types of spermatophyta plants found in Bogor city parks. The conclusion obtained were 47 species of angiosperms consisting of 37 Dicots and 10 Monocots, the highest relative frequency was Mangifera indica, Plumeria rubra, Tabebuia aurea with a value of 8.4507%, the highest relative frequency in Monocots was the type of Canna indica and Crinum asiaticum L with a value of 15%. The highest relative density is in the type of Ruellia Angustifolia with a value of 34.613% and the highest relative density of Angiospemae in Monocots is the type of Canna indica with a value of 34.7099%. The highest relative dominance of Dicotyledonous Angiospermae is the type of Ceiba pentandra 91.7068% and the highest relative dominance of Monocotyledonous Angiospemae is the type of Livistona chinensis 22.44%. The highest Important Value Index is on the type of Ceiba pentandra with a value of 93,1868%, and the Important Value Index on Monocots is on the type of Canna indica with a value of 62.334%. the diversity index of spermatophyta plants in the city park of busy traffic is 1.5 and the city park of quiet traffic obtained a conclusion of 1.8 which means that the diversity index in the city park is moderate.

Keywords: Angiosperm, Diversity, Green Open Space