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Journal articles on the topic 'Alga'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Kumampung, Deislie Roxmerie H., Frans Lumoindong, and Ester Dellayani Angkouw. "Diversity Of Types And Abundance Of Algae, In Meras Waters Of North Sulawesi, Photosynthesis Pigments And Cell Structure." Jurnal Ilmiah PLATAX 12, no. 1 (2023): 20–25. http://dx.doi.org/10.35800/jip.v12i1.51672.

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Research on the diversity of algae types and their abundance in Meras waters has been carried out using structured line transect sampling and quadrant placement methods. The result is a diversity of algae types with a Shannon index (H') above 1.75. This shows that the diversity of algae types is moderate where water conditions are still good enough for algae growth. This is reinforced by the results of analysis of the structure of algal cells using TEM which found the presence of Floridian starch as evidence of the photosynthesis process taking place in these waters. When algae to grow and dev

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Reiter, Michael A. "Development of Benthic Algal Assemblages Subjected to Differing Near-Substrate Hydrodynamic Regimes." Canadian Journal of Fisheries and Aquatic Sciences 46, no. 8 (1989): 1375–82. http://dx.doi.org/10.1139/f89-176.

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Recent research concerning benthic algae in streams suggests that the near-substrate hydrodynamic regime may affect the composition of benthic algal assemblages. Algae from local streams were allowed to colonize laboratory flumes containing substrates of different sizes under two velocity regimes to determine whether benthic algal assemblages were affected by substrate size or hydrodynamics. While all hydrodynamic parameters except for local velocity diverged among flumes with different substrate sizes, cell counts per unit area of substrate and the relative proportions of different forms of a

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Srivastava, S., and Afroz Alam. "Frullania tamarisci (L.) Dum. - A new phorophyte for Stigonema cf. minutum (C.A.Agardh) Hassall." Indian Journal of Forestry 28, no. 4 (2005): 429–32. http://dx.doi.org/10.54207/bsmps1000-2005-36eetp.

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Bryophytes along with some Algae and Lichens form the primary components of the terrestrial ecosystem. They are often found in close association and intermingled with each other. A cyanophycean alga, Stigonema cf. minutum (C.A.Agardh) Hassall has been found growing as an epiphyte on Frullania tamarisci. The association is peculiar as the algal filaments form a close net all over the surface of phorophyte. F. tamarisci, a new phorophyte for an epiphytic cyanohycean alga from India is being reported.

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Rico Taareluan, Rico, Letha L. Wantania, Elvy L. Ginting, et al. "AMPLIFIKASI GEN 16S-rRNA BAKTERI EPIFIT PADA ALGA MERAH Kappaphycus alvarezii." JURNAL PESISIR DAN LAUT TROPIS 8, no. 1 (2020): 116. http://dx.doi.org/10.35800/jplt.8.1.2020.27696.

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Bacteria are microscopic organism found living in marine algae. So far, species of bacteria in marine algae are not well known. In this study, epiphytic bacteria in algal species of Kappaphycus alvarezii (red algae) were isolated to amplify their 16S-rRNA gene. Sample K.alvarezii was collected from the island of Nain. The isolated epiphytic bacteria from the red algae K.alvarezii were grown in Nutrient Broth (NB) media. DNA extraction was carried out using InnuPREP DNA Mini Kit. 16SrRNA genes was performed using primer pair of 8F and 1492R. Two different character of epiphytic bacteria were su

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Lin, Rui, and G. Patrick Ritz. "Reflectance FT-IR Microspectroscopy of Fossil Algae Contained in Organic-Rich Shales." Applied Spectroscopy 47, no. 3 (1993): 265–71. http://dx.doi.org/10.1366/0003702934066794.

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A microscope sampling accessory interfaced to a Fourier transform infrared (FT-IR) spectrometer has been employed to characterize the remains of individual microscopic fossil algae and algal colonies contained in organic-rich shales. The microspectrometer is able to measure reflectance IR spectra of samples with cross-sectional areas as small as 20 × 20 microns. The fossil algae studied include the colonial green alga Botryococcus braunii, the unicellular green alga Tasmanites, and an unidentified filamentous alga. It was found that IR spectra of the fossil algae, in common, contain intense al

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Sugiarto, Kristi Aji, Desy MH Mantiri, Nickson J. Kawung, Rizald M. Rompas, Sandra O. Tilaar, and Adnan Wantasen. "PENGARUH LOGAM BERAT TIMBAL TERHADAP PERTUMBUHAN ALGA Halimeda opuntia YANG DIKULTUR DALAM WADAH TERKONTROL." JURNAL PESISIR DAN LAUT TROPIS 8, no. 3 (2020): 17. http://dx.doi.org/10.35800/jplt.8.3.2020.32239.

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Heavy metal is a very dangerous pollutant waste for it cannot be destroyed (non-degradable) and over time it will accumulate in the ocean. This study aims to determine the lead content in sediment, water and algal thallus as well as to determine the algae growth that has been treated with lead. The research method used was a completely randomized design (CRD) which consisted of 3 treatments, using different treatments for each sample. The highest metal content obtained in the sediment was 5,124 ppm, in the water was 0.120 ppm, and in the algae thallus was 4,816 ppm respectively. The results sh

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Mirzayanti, Yustia Wulandari, Dian Yanuarita Purwaningsih, Siti Nur Faida, and Nurza Istifara. "Proses Ekstraksi Minyak Alga Chlorella.sp menggunakan Metode Sokhletasi." Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia 5, no. 1 (2020): 12. http://dx.doi.org/10.33366/rekabuana.v5i1.1555.

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Chlorella.sp is a type of green algae and has no flagella. One of the advantages of algae Chlorella.sp is that it has a high reproductive rate. Chlorella.sp algae is one of the algae that has oil content from its body mass. This study aims to determine the effect of the amount of solvent, extraction time on the Chlorella.sp algae oil extraction process using methanol solvent through the sokhletation method. Also, knowing the composition of fatty acids and acid numbers from algae oil Chlorella.sp. The ratio of Chlorella.sp algae: the amount of methanol solvent used are 1: 6; 1: 9 and 1:12 gr/ml

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Pulukadan, Irma, Rene Ch Keppel, and Grevo S. Gerung. "A study on bioecology of macroalgae, genus Caulerpa in northern Minahasa Waters, North Sulawesi Province." AQUATIC SCIENCE & MANAGEMENT 1, no. 1 (2013): 26. http://dx.doi.org/10.35800/jasm.1.1.2013.1965.

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Alga is a marine resource of potential to fisheries and marine sector. It has an important economic value to promote the economy in Indonesia. Nowdays, algae have been used as a relatively high value fisheries commodity since it has been used for food, industrial, pharmaceutical and cosmetic raw materials. This important potential needs to be supported with understanding of its biology and ecology, so that its utilization could increase the livelihood of the coastal villagers. This study was aimed at inventorying and identifying the members of genus Caulerpa found in North Minahasa Regency wat

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Hultgren, Kristin M., and Hannah Mittelstaedt. "Color change in a marine isopod is adaptive in reducing predation." Current Zoology 61, no. 4 (2015): 739–48. http://dx.doi.org/10.1093/czoolo/61.4.739.

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Abstract Although background matching is a common form of camouflage across a wide diversity of animals, there has been surprisingly little experimental work testing the fitness consequences of this camouflage strategy, especially in marine ecosystems. In this study, we tested whether color camouflage enhances survival of the intertidal marine isopod Pentidotea (Idotea) wosnesenskii, quantified patterns of camouflage in different algal habitats, and examined how algal diet affected color change and growth using laboratory assays. In the field, isopods collected from two differently colored alg

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Ginting, Elvy Like, Liviani Rangian, Letha L. Wantania, and Stenly Wullur. "Isolation of Symbiotic Bacteria with Red Algae from Tongkaina Waters, North Sulawesi." JURNAL ILMIAH PLATAX 7, no. 2 (2019): 395. http://dx.doi.org/10.35800/jip.7.2.2019.23728.

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This study aims to isolate symbiotic bacteria with red algae from the waters of Tongkaina, North Sulawesi. The red algae taken were red algae that are similar to the genus Portieria and Gracilaria. Bacteria were cultured and isolated using Nutrient Agar (NA) + sea water. Before bacteria from red algae samples were cultured, each sample of red algae was crushed, homogenized and diluted. The results of this study, 5 bacterial isolates were successfully isolated from red algae similar to Portieria sp. and 5 bacterial isolates from red algae similar to Gracilaria sp. Each bacterial isolate has dif

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Davy, Simon K., Donelle A. Trautman, Michael A. Borowitzka, and Rosalind Hinde. "Ammonium excretion by a symbiotic sponge supplies the nitrogen requirements of its rhodophyte partner." Journal of Experimental Biology 205, no. 22 (2002): 3505–11. http://dx.doi.org/10.1242/jeb.205.22.3505.

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SUMMARY Symbioses between sponges and algae are abundant in the nutrient-poor waters of tropical reefs, yet very little is known of the nutritional interactions that may promote this abundance. We measured nitrogen flux between the sponge Haliclona cymiformis and its symbiotic partner,the rhodophyte Ceratodictyon spongiosum, and assessed the potential importance of this flux to the symbiosis. While the association can take up dissolved inorganic nitrogen (DIN) as ammonium and nitrate from the surrounding sea water, enrichment of the water with nitrate did not affect its rates of photosynthesis

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Tampanguma, Biondi, Grevo Gerung, Calvyn Sondak, Billy Wagey, Indri Manembu, and Khristin Kondoy. "Identifikasi jenis alga Koralin di pulau Salawati, Waigeo Barat kepulauan Raja Ampat dan pantai Malalayang kota Manado." JURNAL PESISIR DAN LAUT TROPIS 5, no. 1 (2017): 9. http://dx.doi.org/10.35800/jplt.5.1.2017.14986.

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Alga koralin merupakan kelompok alga laut (seaweed) yang diklasifikasikan kedalam Divisi Rhodophyta, Kelas Florideophyceae, Ordo Cryptonemiales, Famili Corallinaceae. Secara morfologi (external appearance) kelompok famili ini terbagi atas 2 bagian, yaitu: alga koralin bersegmen (articulated/geniculated Coralline Algae) dan alga koralin tidak bersegmen (non-articulated/nongeniculated Coralline Algae). Tujuan penelitian ini dilakukan untuk mengidentifikasi jenis alga koralin dan mendeskripsikan morfologi alga koralin. Pengambilan sampel dilakukan di Pulau Salawati, Waigeo Barat Kepulauan Raja Am

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El Semary, Nermin Adel, Howrah Mahdi, Abrar Alnoaim, Kawther Heji Alsofan, Sarah Ibrahim Almsthi, and Wed Saleh Albader. "Use of algae from an oasis in Saudi Arabia in production of biofuel and bio-fertilizer." Bangladesh Journal of Botany 47, no. 3 (2018): 523–31. http://dx.doi.org/10.3329/bjb.v47i3.38721.

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AlAhsa oasis in Saudi Arabia is one of the largest oases in the world. Algae, from this region have been under-explored in the past decades. A study was conducted with Chlorococcum strain to produce biofuel alongside the seaweed Hormophysa cuneiformis. Gas Chromatography/Mass Spectrometry of fatty acid composition showed that the biodiesel obtained had limited number of unsaturated fatty acids as compared to the number of saturated fatty acids present, which indicates the stability of the produced biodiesel. Thereby the use of algal biomass for the production of biofuel is feasible. Moreover,

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Kapetanovic, Radomir, Dusan Sladic, Simeon Popov, Mario Zlatovic, Zoran Kljajic, and Miroslav Gasic. "Sterol composition of the Adriatic sea algae Ulva lactuca, Codium dichotomum, Cystoseira adriatica and Fucus virsoides." Journal of the Serbian Chemical Society 70, no. 12 (2005): 1395–400. http://dx.doi.org/10.2298/jsc0512395k.

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The sterol composition of two green algae and two brown algae from the South Adriatic was determined. In the green alga Ulva lactuca, the principal sterols were cholesterol and isofucosterol. In the brown alga Cystoseira adriatica, the main sterols were cholesterol and stigmast-5-en-3?-ol, while the characteristic sterol of the brown algae, fucosterol, was found only in low concentration. The sterol fractions of the green alga Codium dichotomum and the brown alga Fucus virsoides contained practically only one sterol each, comprising more than 90 % of the total sterols (clerosterol in the forme

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Ben-Amotz, A., S. Mokady та M. Avron. "The β-carotene-rich alga Dunaliella bardawil as a source of retinol in a rat diet". British Journal of Nutrition 59, № 3 (1988): 443–49. http://dx.doi.org/10.1079/bjn19880053.

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1. Dunaliella bardawil, a β-carotene-accumulating alga, has been tested as a source of retinol and β-carotene in a diet given to rats. The β-carotene in this alga is composed of about equal amounts of the 9-cis and all-trans isomers. Male weanling rats were fed on a retinol-deficient diet for 60 d. Thereafter, the rats were divided into groups and fed on a diet deficient in retinol or supplemented with retinol, synthetic β-carotene, dry alga or an algal oil-extract. Following further growth for 7 d, samples were taken for liver analyses of retinol, retinol isomers and β-carotene.2. Liver analy

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Hotter, Vivien, David Zopf, Hak Joong Kim, et al. "A polyyne toxin produced by an antagonistic bacterium blinds and lyses a Chlamydomonad alga." Proceedings of the National Academy of Sciences 118, no. 33 (2021): e2107695118. http://dx.doi.org/10.1073/pnas.2107695118.

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Algae are key contributors to global carbon fixation and form the basis of many food webs. In nature, their growth is often supported or suppressed by microorganisms. The bacterium Pseudomonas protegens Pf-5 arrests the growth of the green unicellular alga Chlamydomonas reinhardtii, deflagellates the alga by the cyclic lipopeptide orfamide A, and alters its morphology [P. Aiyar et al., Nat. Commun. 8, 1756 (2017)]. Using a combination of Raman microspectroscopy, genome mining, and mutational analysis, we discovered a polyyne toxin, protegencin, which is secreted by P. protegens, penetrates the

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Chairudin, Daniel Y., Deislie R. H. Kumampung, Erly Y. Kaligis, Billy Th Wagey, Joice R. T. S. L. Rimper, and Kurniati Kemer. "STRUKTUR KOMUNITAS ALGA DI SEKITAR PERAIRAN KELURAHAN MERAS KECAMATAN BUNAKEN KOTA MANADO." JURNAL PESISIR DAN LAUT TROPIS 11, no. 2 (2023): 152–59. http://dx.doi.org/10.35800/jplt.11.2.2023.53346.

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Algae in North Sulawesi are still relatively abundant and have begun to be cultivated to be usedas food or medicinal products. However, clear information about the presence of algae species,especially information about algae community structure, has not been widely reported, so it is necessaryto do research on the algae community structure in North Sulawesi waters, more specifically aroundMeras Village waters. This study aims to determine the species of algae and the structure of the algaecommunity around the waters of the Meras Village, namely density, species diversity and dominance.The meth

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Alfasane, Md Almujaddade, Md Miraj Kobad Chowdhury, and Maliha Mehnaz. "Molecular characterization and new reports of two green algae from Bangladesh." Bangladesh Journal of Plant Taxonomy 26, no. 1 (2019): 39–45. http://dx.doi.org/10.3329/bjpt.v26i1.41915.

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This communication portrays the molecular characterization and confirms the new reports of two fresh water green algae namely, Pithophora polymorpha Wittrock and Spirogyra maxima (Hassall) Wittrock from Bangladesh. The samples of these algal species were cultured and partial 18S rDNA was sequenced and analysed for their molecular identification. It was found that the primers reported here could sufficiently identify these algae as P. polymorpha and S. maxima. Furthermore, the Neighbour joining (NJ) tree generated from 18s rDNA sequences suggested that Spirogyra maxima of Bangladesh is distantl

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Grotti, Marco, Francesco Soggia, Cristina Lagomarsino, Walter Goessler, and Kevin A. Francesconi. "Arsenobetaine is a significant arsenical constituent of the red Antarctic alga Phyllophora antarctica." Environmental Chemistry 5, no. 3 (2008): 171. http://dx.doi.org/10.1071/en08025.

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Environmental context. Although arsenic occurs in marine animals at high concentrations, the pathways by which it is biotransformed and accumulated remain largely unknown. The observation that some species of algae can contain significant concentrations of arsenobetaine, a major marine arsenic species, is relevant to explanations of the source of this compound to marine animals and its transport through the marine food web. Abstract. Significant amounts of arsenobetaine (up to 0.80 μg As g–1 dry mass, representing 17% of the extractable arsenic) were found in the extracts of all four samples o

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Surya, Reggie, Felicia Tedjakusuma, Olifia Rombot, and David Nugroho. "Supplementation of dried Porphyra alga (nori) improves antioxidant activity and isoflavone bioavailability of tempeh." IOP Conference Series: Earth and Environmental Science 1445, no. 1 (2025): 012006. https://doi.org/10.1088/1755-1315/1445/1/012006.

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Abstract Tempeh, a traditional Indonesian food product derived from the fermentation of soybeans by Rhizopus molds, is recognized for its essential nutrients and potential health benefits as a functional food. Recent advancements aim to enhance tempeh’s functional value, notably through the supplementation of algae. This research aligns with Sustainable Development Goal (SDG) No. 3, which focuses on health and well-being, by exploring the antioxidant activity and isoflavone profile of tempeh co-fermented with Porphyra, a red alga commercially known as nori. The results indicated that alga supp

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Ji, Shi-Qi, Bing Wang, Ming Lu, and Fu-Li Li. "Defluviitalea phaphyphila sp. nov., a Novel Thermophilic Bacterium That Degrades Brown Algae." Applied and Environmental Microbiology 82, no. 3 (2015): 868–77. http://dx.doi.org/10.1128/aem.03297-15.

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ABSTRACTBrown algae are one of the largest groups of oceanic primary producers for CO2removal and carbon sinks for coastal regions. However, the mechanism for brown alga assimilation remains largely unknown in thermophilic microorganisms. In this work, a thermophilic alginolytic community was enriched from coastal sediment, from which an obligate anaerobic and thermophilic bacterial strain, designated Alg1, was isolated. Alg1 shared a 16S rRNA gene identity of 94.6% withDefluviitalea saccharophilaLIND6LT2T. Phenotypic, chemotaxonomic, and phylogenetic studies suggested strain Alg1 represented

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Figueiredo, Joana, Luís Narciso, Ralph Turingan, and Junda Lin. "Efficiency of using emerald crabs Mithraculus sculptus to control bubble alga Ventricaria ventricosa (syn. Valonia ventricosa) in aquaria habitats." Journal of the Marine Biological Association of the United Kingdom 88, no. 1 (2007): 95–101. http://dx.doi.org/10.1017/s0025315408000192.

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Ornamental crabs of the genus Mithraculus (Decapoda: Brachyura: Majidae) are utilized in reef aquaria to control nuisance algae, particularly bubble algae. Although Mithraculus have modified, spooned-shaped chelae to feed on both fleshy and filamentous algae, they may consume alternative foods offered in a reef aquarium. The objective of this study was to determine the efficiency of using Mithraculus sculptus to control the bubble alga Ventricaria ventricosa (Siphonocladales–Cladophorales complex, Chlorophyta) in the presence of alternative foods (commercial pellets and frozen mysids) commonly

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Kodama, Yuuki, and Masahiro Fujishima. "Effects of the Symbiotic Chlorella variabilis on the Host Ciliate Paramecium bursaria Phenotypes." Microorganisms 12, no. 12 (2024): 2537. https://doi.org/10.3390/microorganisms12122537.

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Paramecium bursaria, a ciliated protist, forms a symbiotic relationship with the green alga Chlorella variabilis. This endosymbiotic association is a model system for studying the establishment of secondary symbiosis and interactions between the symbiont and its host organisms. Symbiotic algae reside in specialized compartments called perialgal vacuoles (PVs) within the host cytoplasm, which protect them from digestion by host lysosomal fusion. The relationship between P. bursaria and symbiotic Chlorella spp. is characterized by mutualism, in which both organisms benefit from this association.

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Pondaag, Kristy Sofia, Grevo Soleman Gerung, Chatrien Annita Sinjal, Calvyn F. A. Sondak, Sandra O. Tilaar, and Reny L. Kreckhoff. "Identification of Coraline Algae In Meras Waters Bunaken District." Jurnal Ilmiah PLATAX 10, no. 2 (2022): 380. http://dx.doi.org/10.35800/jip.v10i2.42462.

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Marine algae are part of marine organisms, especially plants, and are included in lower plants that do not have different skeletal structures such as roots, stems, and leaves. Although it looks different, algae is actually just a form of the thallus. Coralline algae belong to the Rhodophyta Division, Class Florideophycidae, Order Corallinales. Coralline algae are divided into two parts based on their shape (morphology), namely non-geniculate and geniculate. This study aims to identify the types of coralline algae that are crustose (non-geniculate) and branched (geniculate) found in Meras, Buna

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Keintjem, Brigieta, Defny S. Wewengkang, and Fatimawali Fatimawali. "AKTIVITAS PENGHAMBATAN PERTUMBUHAN MIKROORGANISME DARI EKSTRAK DAN FRAKSI ALGA Ulva lactuca TERHADAP Escherichia coli, Staphylococcus aureus, DAN Candida albicans." PHARMACON 8, no. 2 (2019): 397. http://dx.doi.org/10.35799/pha.8.2019.29306.

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ABSTRACT Algae have long been used for the treatment of various types of diseases. Ulva lactuca is one of the algae, which contains bioactive substances as antimicrobial, antifungal, and antioxidant. This study aims to determine the microorganisms growth inhibitory activity from Ulva lactuca algae obtained from the of Lembeh Strait waters in City of Bitung against microorganisms Escherichia coli, Staphylococcus aureus and Candida albicans. Ulva lactuca algae was extracted using maceration method with ethanol solvent and fractionated with methanol, n-hexan and chloroform solvents. Testing of an

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Bocanegra, Aránzazu, Adrián Macho-González, Alba Garcimartín, Juana Benedí, and Francisco José Sánchez-Muniz. "Whole Alga, Algal Extracts, and Compounds as Ingredients of Functional Foods: Composition and Action Mechanism Relationships in the Prevention and Treatment of Type-2 Diabetes Mellitus." International Journal of Molecular Sciences 22, no. 8 (2021): 3816. http://dx.doi.org/10.3390/ijms22083816.

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Type-2 diabetes mellitus (T2DM) is a major systemic disease which involves impaired pancreatic function and currently affects half a billion people worldwide. Diet is considered the cornerstone to reduce incidence and prevalence of this disease. Algae contains fiber, polyphenols, ω-3 PUFAs, and bioactive molecules with potential antidiabetic activity. This review delves into the applications of algae and their components in T2DM, as well as to ascertain the mechanism involved (e.g., glucose absorption, lipids metabolism, antioxidant properties, etc.). PubMed, and Google Scholar databases were

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Hutchison, Leonard J., and G. L. Barron. "Parasitism of algae by lignicolous Basidiomycota and other fungi." Canadian Journal of Botany 75, no. 6 (1997): 1006–11. http://dx.doi.org/10.1139/b97-111.

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On water agar, 30 out of 81 species of fungi tested showed positive directional hyphal growth towards microcolonies of the green alga Protococcus sp. and produced coralloid masses of branched assimilative hyphae within the invaded algal colonies. Of 77 species of fungi tested against the blue-green alga Synechococcus elongatus, 33 exhibited this same phenomenon. Cell walls of S. elongatus were subsequently lysed while only cell death occurred in Protococcus sp., resulting in the release of the contents that were presumably absorbed by the coralloid hyphae. Branched hyphae from some invading fu

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Alfaro, Andrea C., W. Lindsey Zemke-White, and Winifereti Nainoca. "Faunal composition within algal mats and adjacent habitats on Likuri Island, Fiji Islands." Journal of the Marine Biological Association of the United Kingdom 89, no. 2 (2008): 295–302. http://dx.doi.org/10.1017/s0025315408002774.

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The faunal composition within three mono-specific algal habitats was investigated at Likuri Island, southern Viti Levu, Fiji Islands. Gracilaria maramae was the dominant alga within algal drift mat, seagrass bed, and rocky substrate habitats at the study site. This algal species exhibits two distinctive morphologies depending on whether it is attached or loose-lying. When attached to seagrass blades or rocky substrates, this alga has long straight branches stemming from a single holdfast, while detached individuals develop curled tendrils that re-attach to adjacent substrates. Re-attachment be

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Gerrath, J. F., J. A. Gerrath, and D. W. Larson. "A preliminary account of endolithic algae of limestone cliffs of the Niagara Escarpment." Canadian Journal of Botany 73, no. 5 (1995): 788–93. http://dx.doi.org/10.1139/b95-086.

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This paper reports the discovery of endolithic algae from vertical limestone cliffs associated with the Niagara Escarpment, southern Ontario, Canada. The endolithic habitat forms a distinctive dark green layer 1–3 mm below the surface of the porous dolomitic limestone. Samples of the algal layer were isolated from freshly cleaved rock samples using sterile probes and grown on a solid (agarized) standard algal mineral medium supplemented with soil extract. A diverse assemblage of organisms grew on the agar plates, including bacteria, fungi, blue-green algae (cyanobacteria), green algae, yellow-

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Hengkengbala, Irvan R., Grevo S. Gerung, and Stenly Wullur. "DNA extraction and amplification of the rbcL (ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit) gene of red seaweed Gracilaria sp. from Bahoi Waters, North Minahasa Regency." AQUATIC SCIENCE & MANAGEMENT 6, no. 2 (2019): 33. http://dx.doi.org/10.35800/jasm.6.2.2018.24836.

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Title (Bahasa Indonesia): Ekstraksi DNA dan Amplifikasi gen rbcL(ribulose-1,5-bisphosphate carboxylase/oxygenase large subunit) Alga Merah Gracilaria sp. dari Perairan Desa Bahoi, Kabupaten Minahasa Utara The quality of DNA extraction and gene amplification in algae are influenced by several factors includingthe characters and components of the algal cell wall. Therefore, extraction procedure that successfully works in one species of algae mayfail for another type of algae. The present study was aimed to examine several DNA extraction techniquesand rbcL (ribulose-1,5-bisphosphate carboxylase/o

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Williamson, Bo, Paul W. Gabrielson, and Margarita Brandt. "First report of any species of the red algal order Nemaliales from mainland Ecuador: Neoizziella asiatica (Liagoraceae, Rhodophyta)." Botanica Marina 65, no. 2 (2022): 135–39. http://dx.doi.org/10.1515/bot-2021-0092.

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Abstract The benthic marine algae of the mainland coast of Ecuador are poorly known mainly due to a lack of collections. Currently, DNA barcoding is the preferred method to identify species of benthic marine algae worldwide, as morpho-anatomical characters are inadequate to distinguish many species of macroalgae. We used the red algal barcode rbcL-3P to identify specimens collected in January 2020 from Manabí, Ecuador as Neoizziella asiatica. This is the first member of the red algal order Nemaliales to be reported from the mainland coast of Ecuador and extends the distribution of this alga by

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Tampanguma, Biondi, Grevo S. Gerung, Veibe Warouw, et al. "DNA Isolation And Amplification of the rbcL (ribulose-1,5- bisphosphate carboxylase/oxygenase large subunit) gene of Caulerpa sp., Gracilaria sp., And Sargassum sp." Jurnal Ilmiah PLATAX 8, no. 2 (2020): 214. http://dx.doi.org/10.35800/jip.8.2.2020.30003.

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DNA isolation and gene amplification of algae are significantly influenced by various factors such as characteristics and components of the algae cell wall. Therefore techniques and methods of DNA isolation in certain algae, sometimes only succeed in one particular species and can not be applied to another algae species. Based on that issue, this study was conducted with the aims to determine the succeed of DNA isolation and amplify the rbcL gene as a target gene for identification. Algae DNA was isolated by using innuPrep Plant DNA commercial kit, and the second one with a modified convention

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Ulaan, Gia Aprilia Kartini, Adithya Yudistira, and Henki Rotinsulu. "UJI AKTIVITAS ANTIOKSIDAN EKSTRAK ETANOL ALGA Ulva lactuca MENGGUNAKAN METODE DPPH (1,1 diphenyl-2-picrylhydrazyl)." PHARMACON 8, no. 3 (2019): 535. http://dx.doi.org/10.35799/pha.8.2019.29327.

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Ulva lactuca Algae habitat was found in shallow marine waters and its morphology is thin and flat thallus. Ulva lactuca Algae, known as sea lettuce, contains a lot of chlorophyll in its cells. Chlorophyll has the ability as a free radical scavenger and also has antioxidant activity. Antioxidants are compounds that could inhibit oxidation reactions by binding to free radicals and highly reactive molecules. This study was conducted to determine the antioxidant activity of ethanol extract of Algae Ulva lactuca obtained from the Lembeh Strait, Bitung City. Ulva lactuca Algae was extracted by macer

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Zakia, Zulfa Siti, and Mirda Prisma Wijayanto. "MODEL NAS (NUTRIENTS-ALGAL-SOCIETY): DINAMIKA HARMFUL ALGAL BLOOMS AKIBAT AKTIVITAS ANTROPOGENIK." SAINTIFIK@: Jurnal Pendidikan MIPA 9, no. 2 (2024): 17–22. https://doi.org/10.33387/saintifik.v9i2.8560.

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HABs (Harmful Algal Blooms) atau ganggang mekar merupakan fenomena terjadinya peningkatan populasi alga di luar kendali (blooming) akibat peningkatan konsentrasi nutrisi di wilayah perairan. Peningkatan nutrisi dapat disebabkan oleh aktivitas antropogenik seperti pencemaran limbah. Dalam penelitian ini, telah dianalisis dinamika HABs akibat aktivitas antropogenik dengan metode pemodelan matematika. Model matematika yang diusulkan selanjutnya disebut sebagai model NAS (Nutrients-Algal-Society). Model NAS terdiri dari tiga variabel yaitu N (Nutrients), A (Algal), dan S (Society). Novelti dari pe

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Kemenangan, Franklin R., Gaspar D. Manu, and Fransine B. Manginsela. "Growth Of Brown Algae, Padina australis, In The Coastal waters of Serei Village, West Likupang District, North Minahasa Regency." JURNAL ILMIAH PLATAX 5, no. 2 (2017): 243. http://dx.doi.org/10.35800/jip.5.2.2017.17003.

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Marine algae is one resource that has important economic value because it has cagar, carrageen and alginate ontent (Indriani and Sumiarsih, 1999). In the world of science, the word algae comes from the Greek , algor which means cold (Nontji, 2002). Padina australis is a species of marine algae belong to Phaeophyta Division (brown algae) which is commonly found in marine waters, from shallow to deep waters. This algae has a wide transparent brown sheet or filament shape. This study was aimed to observe the growth of algae P. australis by using case study method where samples of Padina algae tak

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Hanif, Malik, Rita Kusumawati, and Fira Natasha. "Strategi Pengolahan Alga menjadi Bioenergi: Studi Literatur Sistematik Global." Nusantara Technology and Engineering Review 3, no. 1 (2025): 1–11. https://doi.org/10.55732/nter.v3i1.1672.

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Krisis energi global dan tekanan perubahan iklim mendorong kebutuhan mendesak akan sumber energi alternatif yang berkelanjutan, salah satunya adalah alga. Penelitian ini bertujuan untuk mengeksplorasi dan merumuskan strategi pengolahan alga menjadi bioenergi melalui pendekatan sistematik terhadap literatur ilmiah global. Metode systematic literature review digunakan untuk mengkaji berbagai strategi pemilihan spesies, teknik ekstraksi lipid, proses pirolisis, serta pemanfaatan senyawa bioaktif dari alga. Hasil studi menunjukkan bahwa alga memiliki potensi ganda sebagai sumber energi dan penyera

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Moniung, Prisilia, Marina Singkoh, and Regina Butarbutar. "Potensi Alga Halymenia durvillei Sebagai Sumber Antioksidan Alami." JURNAL BIOS LOGOS 12, no. 1 (2022): 39. http://dx.doi.org/10.35799/jbl.v12i1.36721.

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Red algae have the ability to produce secondary metabolites which are bioactive compounds. The content of secondary metabolites from red algae can be determined by an approach method that can provide information on the presence of secondary metabolites. The purpose of this study was to identify bioactive compounds, as well as to analyze the natural antioxidant activity of H. durvillei algae. Extracts were made by maceration method using 96% ethanol. Antioxidant activity test using DPPH method. Algae extract H. durvillei contains compounds of alkaloids, tannins, saponins and phenols which have

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Iyanleba, Jonathan Yohanes, Rene Ch Kepel, John Leonard Tombokan, Kristen F. I. Kondoy, Stephanus Vianny Mandagi, and Alex D. Kambey. "Community Structure of Macroalgae in the Coastal Waters of Tiwoho Village, Wori District, North Minahasa Regency." Jurnal Ilmiah Platax 13, no. 1 (2025): 50–57. https://doi.org/10.35800/jip.v13i1.60693.

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The purpose of this study is to describe the morphology and anatomy of each macroalgae species and to analyze the community structure of macroalgae from the study location. Data collection was carried out using the Line Transect method with quadrat sampling techniques conducted at the lowest tide. Temperature measurement was done using a thermometer and salinity using a refractometer, while substrate determination was visually assessed based on the type of substrate. The results of this study found 7 species, consisting of 1 species of red algae, 4 species of brown algae, and 2 species of gree

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K., Santhoshkumar, Prasanthkumar S., and J. G. Ray. "Chlorococcum humicola (Nageli) Rabenhorst as a Renewable Source of Bioproducts and Biofuel." Journal of Plant Studies 5, no. 1 (2016): 48. http://dx.doi.org/10.5539/jps.v5n1p48.

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Among the diverse new generation biomass yielding species, green algae are the most promising organisms. Compared to biomass production of other organisms, production of algae is less laborious, quite fast, and more economical. Moreover, eutrophicated waters get naturally purified in the cultivation process of algae. Algal biomass from monoculture of specific species, which are rich in carbohydrates, proteins and lipids, is considered a good source of diverse bio-products and feed-stock for food, feeds and bio-fuels. Quantity and quality of algal biomass for specific products depend on the spe

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Kepel, Rene Ch, and Desy M. H. Mantiri. "The biodiversity of macroalgae in the coastal waters of Kora-Kora, East Lembean Sub-District, Minahasa Regency." JURNAL ILMIAH PLATAX 7, no. 2 (2019): 383. http://dx.doi.org/10.35800/jip.7.2.2019.23727.

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This study was carried out in coastal waters of Kora-Kora, East Lembean Sub-District, Minahasa Regency with an objective of knowing the taxa composition of macroalgae through morphological studies. Data collection used exploring survey. Results found 10 species that consisted 1 species of red algae (Rhodophyta), 6 species of brown algae (Phaeophyta), and 3 species of green algae (Chlorophyta).Keyword: Macroalgae, Kora-Kora. ABSTRAKPenelitian ini dilakukan di perairan pesisir Kora-Kora, Kecamatan Lembean Timur, Kabupaten Minahasa dengan tujuan untuk mengetahui komposisi taksa makroalga melalui

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Eich, Andreas, Amanda K. Ford, Maggy M. Nugues, Ryan S. McAndrews, Christian Wild, and Sebastian C. A. Ferse. "Positive association between epiphytes and competitiveness of the brown algal genus Lobophora against corals." PeerJ 7 (February 8, 2019): e6380. http://dx.doi.org/10.7717/peerj.6380.

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Observations of coral–algal competition can provide valuable information about the state of coral reef ecosystems. Here, we report contact rates and apparent competition states for six shallow lagoonal reefs in Fiji. A total of 81.4% of examined coral perimeters were found to be in contact with algae, with turf algae (54.7%) and macroalgae of the genus Lobophora (16.8%) representing the most frequently observed contacts. Turf algae competitiveness was low, with 21.8% of coral–turf contacts being won by the algae (i.e. overgrowth or bleaching of coral tissue). In contrast, Lobophora competitive

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Kepel, Rene Charles, Desy M. H. Mantiri, and Nasprianto. "The biodiversity of macroalgae in the coastal waters of Tongkaina, Manado City." JURNAL ILMIAH PLATAX 6, no. 1 (2018): 160. http://dx.doi.org/10.35800/jip.6.1.2018.19558.

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This study was carried out in coastal waters of Tongkaina, Manado City with an objective of knowing the taxa composition of macroalgae through morphological studies. Data collection used exploring survey. Results found 15 species that consisted 7 species of green algae, 4 species of brown algae, and 4 species of red algae.Keyword: Macroalgae, Tongkaina. AbstrakPenelitian ini dilakukan di perairan pesisir Tongkaina, Kota Manado dengan tujuan untuk mengetahui komposisi taksa makroalga melalui pendekatan morfologi. Pengambilan data dilakukan dengan menggunakan metode Survei Jelajah. Hasil penelit

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Bhaskar, Sailendra, Krishnan Kathiravan, and Sachitra Kumar Ratha. "Algal Strain Improvement by Chemical Mutagenesis of Microalga AMS16 A Strain of Thraustochytrid Alga Schizochytrium limacinum." International Journal of Current Microbiology and Applied Sciences 11, no. 6 (2022): 266–69. http://dx.doi.org/10.20546/ijcmas.2022.1106.029.

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Random mutagenesis has for long been used as a tool to genetically modify organisms for various purposes, such as increasing biomass yield or yield of specific biomolecules or improved adaptation to cultivation conditions. Random mutagenesis is especially attractive for systems where it is not obvious which genes require modification and has been extensively used to beneficially modify crop plants. However, even with the renewed interest in microalgae for biofuel applications, there is relatively little current research available on the application of random mutagenesis in microalgae. In this

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Matitaputty, Mario, Sucahyo Sucahyo, and Susanti Pudji Hastuti. "Pengaruh Penambahan Eco-Enzyme Terhadap Struktur Komunitas Alga Perifiton." Jurnal Ilmiah Ecosystem 25, no. 1 (2025): 01–10. https://doi.org/10.35965/eco.v25i1.4393.

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Penelitian tentang pengaruh penambahan eco-enzyme terhadap struktur komunitas alga perifiton bertujuan untuk menjawab salah satu alternatif penanganan pencemaran ekosistem perairan dengan memperhitungkan dampak negatif yang dapat dihasilkan seperti meledaknya populasi alga perifiton. Penelitian dilakukan di Laboratorium Akuakultur Fakultas Biologi, Universitas Kristen Satya Wacana, Salatiga. Waktu penelitian dilakukan mulai bulan Januari hingga Mei 2023. Metode yang digunakan adalah metode eksperimental, perifiton akan ditumbuhkan pada aquarium volume 4 L., dengan menggunakan enam pemberian ec

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Trowbridge, Cynthia D., Colin Little, Penny Stirling, and William F. Farnham. "Sacoglossan gastropods on native and introduced hosts in Lough Hyne, Ireland: larval retention and population asynchrony?" Journal of the Marine Biological Association of the United Kingdom 88, no. 4 (2008): 771–82. http://dx.doi.org/10.1017/s0025315408001690.

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The north-eastern Atlantic sacoglossan gastropod Elysia viridis was studied on littoral and sublittoral shores of the British Isles from 2001 to 2007 to evaluate its potential role in the known decline of the invasive green alga Codium fragile ssp. fragile. Across its European range, this sacoglossan associates with eight genera of algal hosts within three algal orders and two divisions; these hosts include native and introduced macroalgae. The ‘specialist’ herbivore was investigated primarily within the rocky shore community at Lough Hyne Marine Reserve, County Cork, south-west Ireland, with

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Baars, D. L. "Kansaphyllum, a new Late Pennsylvanian phylloid algal genus." Journal of Paleontology 66, no. 4 (1992): 697–701. http://dx.doi.org/10.1017/s0022336000024628.

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Phylloid (leaf-shaped) fossil algae are common constituents in sedimentary rocks of Late Pennsylvanian through Early Permian age in the Midcontinent, U.S.A., commonly producing porous algal-rich bioherms that may be prolific petroleum reservoir rocks. During the course of re-evaluating the paleontological character of these fossil algae in Kansas, remarkably well-preserved codiacean algae were found in an oncolitic nodule in the Wakarusa Limestone Member of the Bern Limestone (Virgilian) in Lyon County, Kansas. Although this is the locality and stratigraphic bed from which the genotype Anchico

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Jerković, Igor, Sanja Radman, and Stela Jokić. "Distribution and Role of Oct-1-en-3-ol in Marine Algae." Compounds 1, no. 3 (2021): 125–33. http://dx.doi.org/10.3390/compounds1030011.

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Oct-1-en-3-ol has been studied among oxylipins as a global metabolome that induce the defense of marine algae. The present short review summarized the research of oct-1-en-3-ol as the stress response molecule in marine algae including different aspects: (i) its biosynthesis from fatty acids; (ii) its distribution in marine algae; (iii) a direct effect of oct-1-en-3-ol on microorganisms infecting the thalli; (iv) an indirect communication molecule for alga-alga signaling; and (v) as an inducer that initiates the defense response of algae.

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Kepel, Rene Charles, Desy M. H. Mantiri, Anton Rumengan, and Nasprianto. "The biodiversity of macroalgae in the coastal waters of Blongko Village, Sub-District of Sinonsayang, District of South Minahasa." JURNAL ILMIAH PLATAX 6, no. 1 (2018): 174. http://dx.doi.org/10.35800/jip.6.1.2018.19583.

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This study was carried out in coastal waters of Blongko Vilage, Sub-District of Sinonsayang, District of South Minahasa with an objective of knowing the taxa composition of macroalgae through morphological studies. Data collection used exploring survey. Results found 14 species that consisted 8 species of green algae, 2 species of brown algae, and 4 species of red algae.Keyword: Macroalgae, Blongko. Abstrak Penelitian ini dilakukan di perairan pesisir Blongko, Kecamatan Sinonsayang, Kabupaten Minahasa Selatan dengan tujuan untuk mengetahui komposisi taksa makroalga melalui pendekatan morfologi

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Djabayan-Djibeyan, Pablo, Roslyn Gibbs, and Brian Carpenter. "In vivo Release of Lectins from the Green Alga Ulva fasciata." Natural Product Communications 5, no. 4 (2010): 1934578X1000500. http://dx.doi.org/10.1177/1934578x1000500422.

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The green alga Ulva fasciata Delile (Ulvaceae), after thawing from storage at −20oC, has been used to study the in vivo biosynthesis and release of lectins. The alga was made to resume viable growth by immersion in a PBS buffer, pH 7.4, containing 0.01% w/v sodium azide and irradiating with a halophosphate lamp. The growing alga readily took up 14C leucine, when this was added to the buffer, as seen by a decrease in a sample count rate of ~ 8000 cpm over a period of twenty minutes. The transfer of the radioactivity fed algae into fresh PBS buffer resulted in 14C labeled proteins being subseque

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Wang, J., and AE Douglas. "Nitrogen recycling or nitrogen conservation in an alga-invertebrate symbiosis?" Journal of Experimental Biology 201, no. 16 (1998): 2445–53. http://dx.doi.org/10.1242/jeb.201.16.2445.

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When corals and allied animals are deprived of their symbiotic algae, the ammonium content in their tissues rises. This is commonly interpreted as evidence for nitrogen recycling (i.e. algal assimilation of animal waste ammonium into amino acids that are released back to the animal), but it can also be explained as nitrogen conservation by the animal (i.e. reduced net ammonium production in response to the receipt of algal photosynthetic carbon). This study discriminated between these interpretations in two ways. First, the increased ammonium concentration in the sea anemone Aiptasia pulchella

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