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Showing 1 to 20 of 24 for “"Macroalga"”.
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The investigation of bacterial pathogens of the red macroalga gracilaria gracilis and its response to bacterial infection
The red agar-containing macroalga G. gracilis (Stackhouse) Steentoft, Irvine et, Farnham has occurred in Saldanha Bay, South Africa for many years. However, in recent years a number of collapses in this G. gracilis population were recorded, in some instances almost erradicating the entire …
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The ecology and demography of the introduced macroalga Undaria pinnatifida (Harvey) Suringar in Port Phillip Bay, Victoria, Australia
… high density populations. It is the dominant macroalgal species at the site of invasion during winter and spring and has the potential for further spread from its current distribution in the northern part of Port Phillip Bay. This is the first in Australia examining the effects of temperature, …
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Development of a transformation protocol and cell culture system for the commercially important species of red macroalga, Gracilaria gracilis
… is essential for selecting and/or engineering macroalgal strains that are either more tolerant or resistant to these stresses. This requires in vivo analysis of G. gracilis gene function and regulation in order to introduce new or improved genes into G. gracilis, and for this to be possible, a …
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The effects of the macroalga Gracilaria gracilis and increasing temperatures on the performance of the endemic Cape eelgrass Zostera capensis
… (18ᵒC, 22ᵒC and 30ᵒC) and additions of the macroalga Gracilaria gracilis (high and low) on the performance of the seagrass Zostera capensis, which occurs in Langebaan Lagoon, South Africa over a seven-week period. Results from the laboratory experiment revealed that G. gracilis did not …
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Attractant properties of chemical constituents of the green macroalga Ulva and their response effects on the commercially important sea urchin Tripneustes gratilla
… T. gratilla has a significant preference for the macroalgae Ulva. The purpose of this study is to assess what chemicals contained in Ulva cause this preference. Chemosensory trials involving Ulva and its chemical constituents, as well as wounded Ulva and an artificial feed, were carried out using …
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Identification and characterization of the activated defence response in the commercially important Agarophyte, Gracilaria Gracilis, following exposure to disease elicitors
… expression using cDNA microarrays in the red macroalga G. gracilis. Western hybridization analysis was used to establish whether the observed changes in gene expression following exposure to disease elicitors positively correlated to changes at the protein level.
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The Ecology Of Drift Algae In The Indian River Lagoon, Florida
… to address these questions with the green macroalga Codium decorticatum and the red macroalga Gracilaria tikvahiae. Changes in pigment concentration and biomass were used as indicators of acclimation from an attached to drift state in Gracilaria tikvahiae and Codium decorticatum. Short-term …
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Use of stable isotope signatures in the macroalga Ecklonia maxima and the filter feeder Mytilus galloprovincialis to determine the extent of sewage dispersal from the Green Point outfall, South Africa
Over the last decade natural abundances of stable isotopes ¹³C and ¹⁵N have been used to investigate the transport pathways of nutrients within aquatic ecosystems, and have contributed new understanding and knowledge to many aspects of ecology, which include tracking the spatial extents of nutrient …
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Interactions Between The Nudibranch Okenia Zoobotryon And Its Bryozoan
… O. zoobotryon adults and egg masses on the red macroalga S. filamentosa mixed with Z. verticillatum (0.01 and 0.05 g/wet-weight, respectively), none on the bryozoan Amathia distans, and none on the red macroalga Gracilaria tikvahiae. To determine if prey identification was associated with an …
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In vitro culture studies of environmental factors and the effects of copper on a fouling alga, Cladophora glomerata (L) Kützing, which occurs in South African freshwater systems
The filamentous green macroalga, Cladophora glomerata (L.) Kütz., is problematic as a fouling organism in eutrophic freshwater systems in South Africa. A general consensus among scientific researchers is that C. glomerata thrives under high light conditions, temperatures between 15° C and 25° C, …
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Acclimating across healthy and degraded reefs
… and Sargassum polycystum C. Agardh (a brown macroalga)- which are found in both fished and protected reefs, to investigate this plastic response and understand how these species cope in healthy versus degraded environments. We found that the fish E. merra exhibits plasticity in diet and feeds …
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Culture-independent analysis of the bacterial community shifts in a macroalgal disease
… functioning. Delisea pulchra is a temperate red macroalga that is affected by a bleaching disease that increase in frequency during summer, when seawater temperature rises and the algal’s chemical defenses are reduced. The role of bacteria in the disease has been implied by difference in the …
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Ulva as a functional feed: a practical investigation into the effects of Ulva lacinulata on the growth, consumption, health and gut microbiota of the farmed abalone Haliotis midae
… been increased adoption of cultivation of the macroalga Ulva by the South African abalone aquaculture industry using IMTA systems. Farms that use fresh Ulva as a supplement to formulated feed have reported a reduction in the volume of formulated feed required to achieve optimal growth of …
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Bioecología de la comunidad de macroalgas bentónicas de los arrecifes de ostras en bahía Anegada (Buenos Aires) : potencialidades de explotación y cultivo algal
Las macroalgas marinas son organismos frecuentes en las piletas de marea, donde juegan un rol fundamental como productores primarios. La costa atlántica Argentina ofrece un amplio gradiente ambiental para el establecimiento de poblaciones de macroalgas, sin embargo la flora macroalgal bonaerense ha …
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Pirólisis de biomasa residual abundante en la región sur de la provincia de Buenos Aires para la obtención de productos de alto valor agregado
… al 100%. En el Capítulo 4 se caracteriza la macroalga Rhizoclonium sp. Se realizan pirólisis catalíticas con SBA-15, Cu-SBA-15 y Al-Fe-MCM-41, determinándose una fuerte influencia de los mismos sobre la composición del bio-líquido. Las características ácidas y las propiedades redox de los …
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Valorization of industrial solid residue from macroalgae by emerging technologies
Uno de los principales problemas que afronta la sociedad actual es la acumulación de residuos, consecuencia de una creciente población y una mayor calidad de vida. Sin embargo, el concepto de biorrefinería, donde los residuos son tratados como nuevas materias primas que puedan ser reincorporadas al …
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Evaluación bioecológica de Meridionella obtusangula (Rhodophyta) del Golfo San Matías y su valoración como fuente de ficocoloides
… (Floridiophyceae, Gigartinales, Rhodophyta) una macroalga roja recientemente descubierta en el Golfo San Matías, Argentina. Incluye estudios que integran tanto aspectos básicos de su taxonomía, biología y ecología, como aplicados que resultaron en la obtención y caracterización de polisacáridos …
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Marine macrophyte monitoringenabling scalability through remote sensing data and cloud computing
… eficaz mediante imágenes Sentinel-2 de la macroalga parda invasora R. okamurae, cercana a la costa, caracterizando hiperespectralmente las etapas de degradación de R. okamurae y Z. noltii varadas en la playa, en relación con la biomasa, el contenido de agua y la fotoxidación de los …
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Production of bioplastic precursors (polyhydroxyalkanoates) from macroalgae
… there has been increasing interest in the use of macroalgae to obtain high value-added products through biotechnological processes. This natural biomass has many advantages, such as the fact that they do not need land or fresh water to be cultivated. Moreover, they are not energy crops, so they do …
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