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| Registros recuperados: 28 | |
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| Pellizzari,Franciane Maria; Bernardi,Juliane; Silva,Elzi Manoelle; Silva,Michelle Cristine; Yokoya,Nair S.. |
| This study describes the diversity of benthic marine algae from insular areas of the southern Brazilian coast. Algal samples were collected between 2006 and 2010 during the winter and the summer seasons at three sites in the coastal waters of Paraná, Brazil: Ilha do Mel, Currais Archipelago and Ilha do Farol. The samples were collected along parallel transects on the coast. In this survey, Paraná marine phycoflora comprised 139 taxa (90 Rhodophyta, 27 Chlorophyta and 22 Phaeophyceae). Fifty-two species represent new records for the state, and 14 taxa are present at all sampling sites and in both seasons. Higher diversities of rhodophytes and chlorophytes were observed at Ilha do Mel, while phaeophytes were more diverse at Currais Archipelago. Lower algal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seaweeds; Inventory; Paraná Coast; Southern Atlantic. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000200113 |
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| ISMAIL,Gehan Ahmed. |
| Abstract The present study investigated the biochemical composition of three seaweeds; Ulva fasciata (Chlorophyta), Sargassum linifolium (Phaeophyta) and Corallina officinalis (Rhodophyta). Total chlorophyll content was maximum in U. fasciata (34.06mg/g dry wt.) while carotenoid content was the highest in C. officinalis (3.8 mg/g dry wt.). The uppermost level of carbohydrates was (27.98% of dry wt.) in C. officinalis and proteins were maximum (14.89%) in S. linifolium. Aspartic, glutamic, alanine, leucine and proline were common amino acids in the three tested species. The polyunsaturated ω6 and ω3 essential fatty acids were recorded in S. linifolium (3.28%) and in U. fasciata (3.18%). The results showed that U. fasciata contained the highest amounts of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Seaweeds; Biochemical composition; Elemental analysis; Antioxidant activity. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000200294 |
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| Matysiak,Kinga; Miziniak,Wojciech; Kaczmarek,Sylwia; Kierzek,Roman. |
| ABSTRACT: Although the knowledge on agricultural using of biostimulants increases, there is still little information on their interactions with other chemicals i.e. herbicides. The aim of the study was to assess the influence of popular herbicides (MCPA + dicamba, dicamba + triasulfuron, florasulam+2,4-D) used with and without biostimulants based on seaweed extract (Kelpak) and nitrophenols (Asahi) on weed control efficiency, yield and quality of the crop. Field trial was carried out in the years 2014 and 2015 in the Institute of Plant Protection - National Research Institute in Poznan (Poland). The experiment was established on spring wheat cv.‘Torridon’, in 4 replications, using randomized block design. In the experiment two variants of application were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biostimulant; Seaweeds; Algae extract; Herbicides; Tank mixtures; Wheat. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001100204 |
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| Pavoni, B; Caliceti, M; Sperni, L; Sfriso, A. |
| Samples of seven genera of seaweeds (Ulva, Gracilaria, Porphyra, Grateloupia, Undaria, Fucus and Cystoseira), which can be used as environmental biomonitors and in several applications like human alimentation, animal feeding and cosmetics, were collected in four sampling sites in the Lagoon of Venice in spring and autumn 1999 with the aim of determining the contamination due to organic micropollutants (polychlorinated biphenyls. PCBs; chlorinated pesticides; polycyclic aromatic hydrocarbons, PAHs). On an average, most of the considered species were contaminated especially by PAHs (up to 56 ng g(-1) dry wt. (dw)) whereas concentrations of PCBs and pesticides in macroalgal tissues were significantly correlated and did not exceed 5 ng g-1 dw. Among the... |
| Tipo: Text |
Palavras-chave: Macro-algues; Lagune de Venise; HAP; PCB; Pesticides; Seaweeds; Venice Lagoon; PAHs; PCBs; Pesticides. |
| Ano: 2003 |
URL: http://archimer.ifremer.fr/doc/00321/43250/42981.pdf |
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| Kaas, Raymond. |
| Introduction. The amount of hydrocarbons dumped into the sea is currently estimated at 6 to 16 million tons per year. This pollution comes from various sources: Chronic discharges associated with human activity such as oil tanker deballasting or discharges from coastal petroleum processing facilities; natural chronic discharges; accidental discharges like leaks coming from drilling well heads or oil tanker accidents. Natural spills happen, in general, in a relatively unobtrusive way and their effects are quickly diminished by significant dilution and rapid degradation of the various components. Oil spills, however, are characterised by a massive and occasional supply of hydrocarbons. The "Amoco Cadiz" shipwreck fits in with this last case and has seemed... |
| Tipo: Text |
Palavras-chave: Seaweeds; Pollution Effects; Marine Pollution; Oil Spill. |
| Ano: 1980 |
URL: http://archimer.ifremer.fr/doc/1980/publication-1950.pdf |
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| Stiger-pouvreau, Valerie; Zubia, Mayalen. |
| This review focuses on the diversity of French tropical overseas macroalgae and their biotechnological applications. After listing the specific diversity, i.e. 641 species in French Antilles in the Atlantic Ocean, 560 species in the Indian Ocean, and 1015 species in the South Pacific Ocean, we present the potential of their metabolites and their main uses. Among the great diversity of metabolites, we focus on carbohydrates, proteins, lipids, pigments and secondary metabolites, in particular terpenes and phenolic compounds. The main applications of reef macroalgae are described in human and animal consumptions, phycocolloids extraction, production of active ingredients for health, cosmetics, agriculture, and bioremediation. For each application, we list... |
| Tipo: Text |
Palavras-chave: Biotechnological applications; Coral reef; Diversity; French territories; Seaweeds. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00605/71684/70125.pdf |
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| Jong, Yde S.D.M. de; Hitipeuw, Creusa; Prud’homme van Reine, Willem F.. |
| A cladistic analysis, based on a taxonomic revision is carried out for 7 Acanthophora species using 19 characters. Hypotheses on species affinities are based primarily on morphological characters. Because most species show only few distinctive characters, emphasis was placed on features of spine development, either in relation to vegetative or to reproductive structures. Global distribution of 7 Acanthophora species: viz. A. aokii, A. dendroides, A. muscoides, A. nayadiformis, A. pacifica, A. ramulosa, and A. spicifera, shows a discontinuous pattern. Although widely distributed species are present (A. muscoides and A. spicifera), a disjunct distribution of other species occurs in the Pacific (A. aokii), Indian Ocean (A. dendroides), East-Atlantic region... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Rhodomelaceae; Rhodophyta; Biogeography; Phylogenetics; Seaweeds; Taxonomy. |
| Ano: 1999 |
URL: http://www.repository.naturalis.nl/record/525490 |
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| Verheij, E.; Prud’homme van Reine, W.F.. |
| Seaweeds are important components of tropical reef systems. The present paper deals with the Chlorophyta, Phaeophyta and noncoralline Rhodophyta collected by the first author in the Spermonde Archipelago, SW Sulawesi, Indonesia, during the Buginesia-III project (November 1988-November 1990). Additional collections from this area by Keblusek (July 1991-October 1991) were also studied and the results are incorporated in the present paper. The results of the present study are compared with those of the Siboga Expedition (1899-1900), of the Danish Expedition to the Kei Islands (1914-1916), and of the Snellius-II Expedition (1985). In total, 199 taxa (80 Chlorophyta belonging to 21 genera, 36 taxa of Phaeophyta belonging to 11 genera, 83 noncoralline Rhodophyta... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Indonesia; Seaweeds; Keys; Biotic reefs. |
| Ano: 1993 |
URL: http://www.repository.naturalis.nl/record/525170 |
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| Ksouri, J.; Elferjani, H.; Mensi, F.. |
| L’identification d’un principe actif servant en thérapie osseuse a propulsé l’algue brune Padina pavonica au rang des algues à intérêt économique très prisées à l’échelle mondiale et en Tunisie. L’évaluation des potentialités de cette espèce au niveau d’un site atelier, Cap Zebib (Nord-Est de la Tunisie), a été initiée pour éclairer les décideurs sur l’état du stock, afin que l’autorisation pour la collecte d’un certain tonnage de cette algue soit accordée en connaissance de cause. A Cap Zebib, l’espèce en question étant localisée dans la zone comprise entre 0 et 10 m, la biomasse naturelle disponible est évaluée à 112,5 tonnes de matière fraîche, soit 25 tonnes de matière sèche (22,2%). Le rendement global est de 0,850 t/ha. Mais, comme la majeure partie... |
| Tipo: Journal Contribution |
Palavras-chave: Biomass; Commercial species; Seaweed products; Seaweeds; Stock assessment. |
| Ano: 2008 |
URL: http://hdl.handle.net/1834/4251 |
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| De Clerck, O.; Bolton, J.J.; John, D.M.. |
| A proper understanding of inshore marine ecosystems cannot be obtained without a thorough knowledge of marine vegetation. This paper summarises our knowledge of species diversity patterns of marine macroalgae in Sub-Saharan Africa, highlighting gaps. In Tropical East Africa the seaweed floras of Somalia and Mozambique are not well known. In Tropical West Africa, only a small number of countries are well-collected, although recent advances, including web-based systems, are ensuring that the information which is available can be more easily accessed. South Africa and Namibia have quite well documented seaweed floras, although detailed collections, especially in the subtidal, or detailed studies of taxa, particularly using molecular methods, anywhere in the... |
| Tipo: Proceedings Paper |
Palavras-chave: Seaweeds. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/973 |
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| Chérif, W.; El Bour, M.; Daly Yahia-Kefi, O.. |
| Les bio-salissures marines intéressent toute structure immergée en mer. Les dommages engendrés par ce phénomène sont économiquement importants. Les peintures utilisées pour prévenir du biofouling, utilisent des biocides organostaniques qui se sont avérés très toxiques et posent un problème environnemental important. Le présent travail s'intègre dans le cadre de la valorisation des macroalgues des côtes tunisiennes par la recherche de molécules naturelles antifouling pouvant se substituer aux substances déjà utilisées. Dans cette étude, nous avons analysé le potentiel anti-microfouling d’extraits organiques de 10 espèces d’algues vertes: Ulva linza, Ulva rigida, Chaetomorpha linum, Cladophora laetivirens, Codium bursa, Codium fragile, Caulerpa prolifera,... |
| Tipo: Journal Contribution |
Palavras-chave: Algae; Seaweeds; Green algae; Bacteria. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4741 |
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| Valdés-Iglesias, O.; Díaz, N.; Cabranes, Y.; Acevedo, M.E.; Areces, A.J.; Graña, L.; Díaz, C.. |
| Cuarenta y cinco especies de algas marinas cubanas colectadas en 2 macrozonas en las costas norte y sur del archipiélago cubano, fueron evaluadas a partir de la preparación de 63 extractos con relación a su toxicidad frente al ensayo alternativo con nauplios de Artemia salina (Mitchael et al, 1956) y la prueba de intercalante de ADN (Miravet et al, 1989). Del total de extractos resultaron muy tóxicos el 33.8 % y moderadamente tóxicos el 52,3 %. El resto resultó no tóxico. De ellos respondieron positivamente a la prueba de intercalantes del ADN, sólo 11 extractos, fundamentalmente los extractos etanólicos, posibles candidatos para ser evaluados como antitumorales. La composición química de los extractos crudos fue analizada con referencia al contenido de... |
| Tipo: Journal Contribution |
Palavras-chave: Seaweeds; Seaweeds; Http://aims.fao.org/aos/agrovoc/c_14154. |
| Ano: 2003 |
URL: http://hdl.handle.net/1834/2918 |
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| Hammer, L.. |
| Se estudió la influencia de temperaturas elevadas y disminuidas, en algunas especies de algas y dos especies de fanerógamas marinas tropicales, de la costa colombiana. Como control de tolerancia se midieron fotosíntesis y respiración a temperatura ambiente (25°C), luego de haber sometido el material vegetal durante 12 horas a la temperatura cambiada. Para todas las algas investigadas se encontró el límite de resistencia de temperaturas entre 34° y 36°C. Ninguna de las algas toleró la temperatura de 38°C. El límite de la tolerancia de temperaturas para las fanerógamas Thalassia testudinum y halophila decipiens está entre 32,5 y 34°C. En general, el aparato fotosintético resultó menos resistente al elevar la temperatura que el sistema respiratorio. La... |
| Tipo: Journal Contribution |
Palavras-chave: Temperature; Seaweeds; Temperature; Seaweeds; Http://aims.fao.org/aos/agrovoc/c_7657; Http://aims.fao.org/aos/agrovoc/c_14154. |
| Ano: 1972 |
URL: http://hdl.handle.net/1834/3288 |
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| Sghaier, Y.R.; Zakhama-Sraieb, R.; Charfi Cheikhrouha, F.. |
| La structure, la phénologie et la croissance des faisceaux des herbiers à Posidonia oceanica ont été étudiées dans quatre sites au niveau du centre Est de la Tunisie (Hergla, El Kantaoui, Monastir et Mahdia). La densité des faisceaux, le recouvrement et les paramètres phénologiques présentent une différence significative entre les sites et les profondeurs en relation avec l’intensité des activités humaines. Les herbiers les plus denses (441 à 984 faisceaux m-²) et les indices foliaires les plus élevés (8,5 à 13m2 m-²)) ont été enregistrés à Mahdia. Le nombre moyen des feuilles produites annuellement ne montre pas de différence significative entre les sites et les profondeurs étudiées. La croissance du rhizome de Posidonia oceanica est considérablement plus... |
| Tipo: Journal Contribution |
Palavras-chave: Seagrass; Seaweeds. |
| Ano: 2011 |
URL: http://hdl.handle.net/1834/4738 |
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| Chouba, L.; Ajjabi-Chebil, L.; Herry, S.. |
| Dans le but de démontrer la capacité de bioaccumulation métallique des macroalgues et sa variation temporelle, on s’est intéressé à la détermination de la gamme de concentrations en métaux traces (Plomb, Cadmium, Fer, Manganèse et Zinc) dans trois macroalgues vertes (Ulva rigida, Chaetomorpha linum, Caulerpa prolifera) au niveau de la lagune nord et du canal de navigation de Tunis sujettes à d’importants rejets anthropiques. Des collectes saisonnières ont été faites dans la lagune de Tunis durant la période d’avril 2009 au février 2010. Les teneurs métalliques déterminées par spectrophotométrie d’absorption atomique ont montré des variations significatives selon l’espèce et la saison de prélèvement. Les résultats ont montré que les teneurs en différents... |
| Tipo: Journal Contribution |
Palavras-chave: Heavy metals; Algae; Seaweeds; Bioaccumulation; Green algae. |
| Ano: 2010 |
URL: http://hdl.handle.net/1834/4733 |
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| Registros recuperados: 28 | |
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