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Dinia R Dwijayanti,
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Biotropika
Published by Universitas Brawijaya
ISSN : 23027282     EISSN : 25498703     DOI : 10.21776/ub.biotropika.
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Biotropika: Journal of Tropical Biology invites research articles, short communication, and reviews describing new findings/phenomena of biological sciences in tropical regions, specifically in the following subjects, but not limited to biotechnology, biodiversity, microbiology, botany, zoology, biosystematics, ecology, and environmental sciences.
Arjuna Subject : -
Articles 544 Documents
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Secondary Metabolite Profile in Stem and Root of Keji Plant (Staurogyne elongata [Blume] Kuntze) Safitri, Hana; Malik, Abdul; Mukaromah, Arnia Sari
Biotropika: Journal of Tropical Biology Vol. 12 No. 1 (2024)
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.biotropika.2024.012.01.02

Abstract

Keji (Staurogyne elongata [Blume] Kuntze) is an herbal medicinal plant that is often found on the Java to Sumatra islands. The leaves and roots of keji (S. elongata) have been used by the community as diuretic drugs, increasing blood pressure and trusted to treat bladder stones, kidney stones, and joint problems. However, research on secondary metabolites in the stems and roots of keji has never been done. The study aimed to identify the secondary metabolite content and marker compounds in the stems and roots of S. elongata. The research stages were drying and sample grinding, extraction, and metabolite compound analysis using Gas Chromatography-Mass Spectrometry (GC-MS). The results showed nine secondary metabolite compounds found in S. elongata stem, such as phenol, terpenoid, and alcohol. Meanwhile, secondary metabolite compounds of S. elongata root were ten compounds from the coumaran, phenols, and ester group. The 2,2’-methylenebis[6-(1,1-dimethylethyl)-4-methyl-phenol is proposed as a marker compound in S. elongata stem. Meanwhile, no secondary metabolites can be used as marker compounds in S. elongata roots because octadecanoic acid, 2-hydroxy-1-(hydroxymethyl)ethyl ester is the primary metabolite.
Water Quality Evaluation of Central Lombok Awang Bay Using Zooplankton Diversity as a Bioindicator Sagista, Reza; Leksono, Amin Setyo; Retnaningdyah, Catur
Biotropika: Journal of Tropical Biology Vol. 12 No. 1 (2024)
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.biotropika.2024.012.01.06

Abstract

The water quality in Awang Bay, West Nusa Tenggara, Indonesia, is considered to be polluted due to human activities. This research aims to evaluate the water quality in Teluk Awang based on the physicochemical properties of water and zooplankton as bioindicators. Sampling was conducted at three beach locations: Awang, Ujung Kelor, and Ekas. The physicochemical water quality parameters measured included water temperature, pH, dissolved oxygen (DO), salinity, and transparency. Additionally, environmental factors were observed based on the naturalness and hemeroby index. The result of the identification and counting of the abundance of each zooplankton can then be used to analyze including taxa richness, total density, the diversity index of Shannon-Wiener (HSW), Margalef diversity index, Simpson diversity index, evenness index (E), and dominance index (C). The resulting research indicated that the physicochemical water qualities have met government quality standards for marine biota needs, except for the level of transparency at Ekas Station 3. Ekas Beach has the highest level of transparency, diversity, taxa richness, and total abundance of zooplankton, indicating the best water quality. Ujung Kelor Beach, which has the highest level of naturalness and the highest DO concentration, has moderate zooplankton diversity, indicating that the water quality is in the medium category. Meanwhile, Awang Beach, which had the highest human activity and the worst water quality, was characterized by low levels of transparency and DO, low diversity, taxa richness, and an abundance of zooplankton. Therefore, diversity, taxa richness, and abundance of zooplankton can be used as a bioindicator for changes in water quality.
Mangrove Density Mapping for Sustainable Utilization and Management in Klawalu Mangrove Tourism Park, Sorong City Pattiasina, Thomas Frans; Tjolli , Ihwan; Bless, Aplena Ellen; Lekitoo, Krisma
Biotropika: Journal of Tropical Biology Vol. 11 No. 3 (2023)
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.biotropika.2023.011.03.01

Abstract

Data and information on resource utilization supported by vegetation mapping are the basis for developing a sustainable mangrove management strategy. This study aims to map the vegetation density and identify the use of mangroves by the community in the Klawalu Mangrove Tourism Park (Taman Wisata Mangrove Klawalu-TWMK) Sorong City. The satellite imagery used is Sentinel 2A level 1C. Image pre-processing includes atmospheric correction, geometric correction and image cropping. Determination of the extent and distribution of mangrove vegetation is carried out by applying the color composite method and mangrove boundary delineation. Mangrove vegetation density mapping was carried out by applying the Normalized Difference Vegetation Index (NDVI) method. Identification of the species and intensity of mangrove utilization was carried out through observation and interviews with respondents who were determined purposively. Based on the results of the analysis, the total area of mangrove vegetation in TWMK and its mapped surroundings is 144.64 ha. Of this area, 69.01 ha (47.71%) is classified as very dense, 34.96 ha (24.17%) is classified as dense, and 24.23 ha (16.75%) is classified as moderate, 12. 94 ha (8.95%) is classified as sparse, and 3.5 ha (2.42%) is classified as very sparse. The intensity of resource utilization from the mangrove ecosystem is quite high, especially the utilization of mangrove wood and coral mining. Awareness/education efforts need to be continued, as well as alternative livelihood solutions to reduce the heavy dependence on mangrove resources.
Evaluation of Water Quality Based on Macrozoobenthos as a Bioindicator in Ngesong Spring and the Ditch, Batu-East Java Susanto, Muhamad Azmi Dwi; Retnaningdyah, Catur; Leksono, Amin Setyo
Biotropika: Journal of Tropical Biology Vol. 12 No. 1 (2024)
Publisher : Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.biotropika.2024.012.01.04

Abstract

Ngesong Spring is a clean spring that is used by society as a spring of clean water and as a tourist attraction. The Ngesong spring has a ditch that flows to the society settlement, where the water is used for agricultural and plantation irrigation. The utilization of the Ngesong Spring as a tourist attraction and its ditch through agriculture, settlements, and society settlements has great potential to cause pollution and degradation of water quality, so it is necessary to evaluate water quality. Therefore, it is necessary to monitor the quality of this water, one of which is the use of the macrozoobenthic community structure as a bioindicator. The research was conducted in four locations, namely, a water spring and the channels that will be used for agriculture, plantations, and settlement activities, in September and October 2022. The variables observed in this study included the physicochemical quality of the water, namely, the water temperature, conductivity, power of hydrogen (pH), dissolved oxygen (DO), biological oxygen demand (BOD), and total suspended solids (TSS), as well as the community structure and macrozoobenthos diversity. The results of this study indicate that 26 macrozoobenthic families belong to 12 orders, for a total of 968 individuals. Water springs had the highest diversity and evenness index values, with H = 2.27 and E = 0.54. The analysis of macrozoobenthic family relationships as an indicator of water quality using the family biotic index (FBI) and average score per taxon (ASPT) showed that the watershed site has very clean water and no organic pollution. At watersheds with good water quality, the families Perlidae, Nemouridae, Limnephilidae, Viviparidae, Chironomidae, and Euphaeidae were found. Moreover, In this study, the locations that have highly organically polluted waters are ditches that have agricultural activities and settlement activities.

Page 55 of 55 | Total Record : 544

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