Consulta: subjectFacets:"Algal blooms"
Registros recuperados: 26
Data/hora: 01/06/2024 06:47:51

Insight on Invasions and Resilience Derived from Spatiotemporal Discontinuities of Biomass at Local and Regional Scales
Provedor de dados: 7
Autores: Angeler, David G; Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment; david.angeler@slu.se; Allen, Craig R; U.S. Geological Survey, Nebraska Cooperative Fish and Wildlife Research Unit; School of Natural Resources, University of Nebraska, Lincoln; allencr@unl.edu; Johnson, Richard K; Swedish University of Agricultural Sciences, Department of Aquatic Sciences and Assessment; richard.johnson@slu.se.
Understanding the social and ecological consequences of species invasions is complicated by nonlinearities in processes, and differences in process and structure as scale is changed. Here we use discontinuity analyses to investigate nonlinear patterns in the distribution of biomass of an invasive nuisance species that could indicate scale-specific organization. We analyze biomass patterns in the flagellate Gonyostomum semen (Raphidophyta) in 75 boreal lakes during an 11-year period (1997-2007). With simulations using a unimodal null model and cluster analysis, we identified regional groupings of lakes based on their biomass patterns. We evaluated the variability of membership of individual lakes in regional biomass groups. Temporal trends in local and...
Tipo: Peer-Reviewed Insight
Palavras-chave: Algal blooms; Alternative states; Biological invasions; Boreal lakes; Complex adaptive systems; Discontinuities; Landscape ecology; Panarchy; Resilience.
Ano: 2012

Estimates of carbon flow through bacteriplankton in the S. Benguela upwelling region based on 3H-thymidine incorporation and predator-free incubations.
Provedor de dados: 5
Autores: Lucas, M; Painting, S; Muir, D.
Spatial and temporal estimates of bacterial numbers, biomass, activity and production were measured in the S. Benguela upwelling system during the course of a phytoplankton bloom. Bacterial numbers and biomass were highest in the euphotic zone and correlated closely with particulate carbon in the water column rather than with chlorophyll a concentrations. 3H-Thymidine incorporation gave good estimates of production. Differential utilisation of photosynthetic exudates and detrital POC by bacterioplankton during the course of a bloom might account for the varying significance ascribed to exudates and POC as a source of carbon for bacterial production.
Tipo: Text
Palavras-chave: Ecological associations; Algal blooms; Biomass; Microorganisms; Carbon cycle; Bacteria; Nannoplankton; Upwelling; Biogeochemistry.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-985.pdf

In situ growth potential of the subtidal part of green tide forming Ulva spp. stocks
Provedor de dados: 5
Autores: Merceron, Michel; Antoine, Virginie; Auby, Isabelle; Morand, P.
Ulva spp., the algae most responsible for green tides in Brittany (France), are found on the foreshore and in the most beachward wave area (MBWA) of many bays during green tide phenomena. These algae have recently been seen drifting at greater depths (reaching -20 m). In view of the significant quantities of algae found at these depths, and the less favorable conditions for algal growth than in the intertidal zone, we attempted to determine if they could grow there. For that, during their maximum growth period (from May to July), algae were picked up at three stations located on the foreshore, in the MBWA and in the subtidal (deep) zones of the Bay of Douarnenez, and their nitrogen, carbon and chlorophyll a+b contents were determined, and their...
Tipo: Text
Palavras-chave: Nutrients; Irradiance; Photosynthesis; Ulva sp.; Algal blooms; Eutrophication.
Ano: 2007
URL: http://archimer.ifremer.fr/doc/2007/publication-3527.pdf

Spectral fluorometric characterization of Haptophyte dynamics using the FluoroProbe: an application in the eastern English Channel for monitoring Phaeocystis globosa
Provedor de dados: 5
Autores: Houliez, Emilie; Lizon, Fabrice; Thyssen, Melilotus; Artigas, Luis Felipe; Schmitt, Francois G.
In this study, we examined the possibility of using the FluoroProbe for monitoring the dynamics of the Haptophyte Phaeocystis globosa in the coastal waters of the eastern English Channel. The FluoroProbe was recalibrated by recording a new fingerprint for P. globosa and the use of this new fingerprint was tested through a series of laboratory and in situ experiments. The annual dynamics of P. globosa estimated using the FluoroProbe and by flow cytometry were similar. A strong relationship was found between the FluoroProbe estimates of P. globosa biomass expressed in terms of chlorophyll a equivalent per litre (eq. mu g L(-1)) and flow cytometric cell counts (r = 0.889, P &lt; 0.001, n = 121). The FluoroProbe can be used to detect the flagellated cells as...
Tipo: Text
Palavras-chave: Spectral fluorescence; Phaeocystis globosa; Haptophytes; Algal blooms; Phytoplankton quantification; Chlorophyll a.
Ano: 2012
URL: https://archimer.ifremer.fr/doc/00373/48461/48723.pdf

Dinoflagelles toxiques sur les cotes francaises durant l'ete 1983. Synthese des connaissances sur les efflorescences estivales de Dinophysis et Gyrodinium.
Provedor de dados: 5
Autores: Marcaillou-le Baut, Claire.
The authors summarize briefly the information given by the foreign studies on two toxic marine dinoflagellates and present the situations observed in 1983 on the coasts of Normandy and Brittany.
Tipo: Text
Palavras-chave: France; ANE; Gyrodinium aureolum; Dinophysis acuminata; Phytoplankton; Red tides; Biological poisons; Algal blooms.
Ano: 1983
URL: http://archimer.ifremer.fr/doc/1983/publication-1804.pdf

Les phenomenes d'eaux colorees en Baie de Seine
Provedor de dados: 5
Autores: Paulmier, Gerard; Joly, Jean-pierre.
Colored waters observed along the French coast are the result of growth of a diversity of phytoplanktonic microorganisms. The authors suggest that all species associated with favorable conditions can cause this tide.
Tipo: Text
Palavras-chave: Species diversity; Phytoplankton; Environmental factors; Algal blooms; Red tides.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1320.pdf

The exceptional surface turbidity of the North-West European shelf seas during the stormy 2013-2014 winter: consequences for the initiation of the phytoplankton blooms?
Provedor de dados: 5
Autores: Gohin, Francis; Bryere, Philippe; Griffiths, Joshua.
A succession of storms during the winter 2013-2014 enhanced the resuspension of sediments in the surface waters of the North-West European shelf seas. The effects of waves on satellite-derived non-algal SPM (Suspended Particulate Matters) are discussed for the January 2008-March 2014 period. A simple statistical model relating locally SPM to tidal intensity and waves help us analyse the main characteristics of the winter 2013-2014. The exceptional run of storms observed in this stormy and rainy winter has resulted in the highest SPM concentration in the Celtic Sea and the Bay of Biscay ever observed by remote-sensing during the 1998-2014 period. Despite the lower clarity of the surface waters over a large part of the continental shelf during the first days...
Tipo: Text
Palavras-chave: Suspended particulate matter; Satellite ocean colour; Waves effects; Climate; Algal blooms; North-West European shelf seas.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00252/36303/34832.pdf

Southampton water and the Solent: Biological effects of the multi-use of an estuarine system.
Provedor de dados: 5
Autores: Lockwood, A.
An outline is provided of (1) some factors which have influenced the clam and oyster populations of the area (2) the effect of nutrient load on phytoplankton production (3) the correlation between Mesodinium blooms and the summer oxygen levels in the stratified part of the estuary and (4) a description of the fauna and flora in regions adjacent to some industrial inputs.
Tipo: Text
Palavras-chave: Aquatic communities; Ecosystems; Coastal zone management; Oyster fisheries; Oxygen depletion; Algal blooms; Phytoplankton; Estuaries; Environmental impact.
Ano: 1985
URL: http://archimer.ifremer.fr/doc/1985/acte-1310.pdf

Contribution a l'etude du microplancton des etangs corses de Diana et Urbino et du secteur marin adjacent.
Provedor de dados: 5
Autores: Paulmier, Gerard.
Investigations carried out in both Corsica lagoons Diana and Urbino during the period from January to August 1985, permitted to define the main characteristics of microplankton cycle. Two phytoplanktonic blooms have been observed, first in winter, second less important in July-August. Any correlation cannot be observed between phytoplanktonic cycle or one its main components, and both environmental variables temperature and salinity. However dissolved oxygen ratio may be subject to large summer variations, drifting towards until ecological desequilibrious.
Tipo: Text
Palavras-chave: Algal blooms; Dissolved oxygen; Salinity effects; Temperature effects; Phytoplankton; Plankton.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/publication-1800.pdf

Impacto de las floraciones algales nocivas en Uruguay: origen, dispersión, monitoreo, control y mitigación
Provedor de dados: 20
Autores: Méndez, S.M.
Las floraciones algales nocivas (FANs) afectan la salud humana, la economía pesquera, el turismo y los ecosistemas acuáticos. Dado que el problema de las FANs es mundial, para minimizar sus efectos se han implementado programas de monitoreo en más de 50 países. El registro de especies de fitoplancton tóxico ha ido creciendo y cada vez se conoce más diversidad de toxinas producidas por estos microorganismos. En Uruguay, la Dirección Nacional de Recursos Acuáticos (DINARA) dependiente del Ministerio de Ganadería Agricultura y Pesca (MGAP) lleva a cabo el monitoreo simultáneo de las FANs y la toxicidad en los moluscos. Esta modalidad de monitoreo y la confirmación de la toxicidad de algunas especies de microalgas, permite establecer la relación de causalidad...
Tipo: Book Section
Palavras-chave: M40; Phytoplankton; Algal blooms; Environmental monitoring; Plant control; Phytoplankton; Environmental monitoring; Algal blooms; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_37876; Http://aims.fao.org/aos/agrovoc/c_32367.
Ano: 2006
URL: http://hdl.handle.net/1834/3245

Bloom de Noctiluca scintillans y Ceratium dens en el Golfo de Guayaquil (2004)
Provedor de dados: 20
Autores: Torres, G.; Palacios, C.
El objetivo de este estudio fue difundir las investigaciones del bloom de C. dens y N. scintillans ocurridos en el Golfo de Guayaquil como parte del Proyecto de Mareas Rojas desarrollado por el Instituto Oceanográfico de la Armada (INOCAR).
Tipo: Journal Contribution
Palavras-chave: Algal blooms; Red tides; Algae; Species diversity; Phytoplankton; Phytoplankton; Algal blooms; Algae; Species diversity; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_32367; Http://aims.fao.org/aos/agrovoc/c_258; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2007
URL: http://hdl.handle.net/1834/2359

Floraciones algales nocivas en la bahía de Santiago de Cuba
Provedor de dados: 20
Autores: Gómez, L.; Díaz, U.; Fernández, A.; Licea, Y.; Álvarez, I.
Santiago de Cuba bay is an ecosystem eutrophic and vulnerable to FANs events. This work preset the results of monitoring during three year in eight stations located in the less polluted area of the bay, leading to the determination of the possible seasonal distribution and FANs frequency. 117 Phytoplankton species were identifying, which belong to 5 divisions; 28% of these species are reported as potentially toxic and/ or noxious. This zone of the bay classifies as politrophic, heterogeneous and dynamics. It highlights the cysts presence, as well as the occurrence of unialgal "blooms" of Gymnodinium catenatum and Cochlodinium polykrikoides, indicating the presence in the ecosystem of favorable conditions to HABs occurrence with negative impact on the...
Tipo: Conference Material
Palavras-chave: Cysts; Eutrophication; Phytoplankton; Algal blooms; Cysts; Eutrophication; Phytoplankton; Algal blooms; Http://aims.fao.org/aos/agrovoc/c_34811; Http://aims.fao.org/aos/agrovoc/c_2734; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_32367.
Ano: 2006
URL: http://hdl.handle.net/1834/2251

Floración algal ocasionada por Prorocentrum mexicanum en el canal de Jambelí
Provedor de dados: 20
Autores: Coello, D.; Cajas, J.; Macías, P.; Lindao, J.
Se presentan los resultados obtenidos de un muestreo realizado en el estuario interior del Golfo de Guayaquil con respecto a la presencia de una marea roja en el Canal de Jambelí frente a las poblaciones de Balao Grande y Tenguel. Se determinaron cuatro estaciones a lo largo del canal y en el estero cercano. Tanto la densidad y composición de fitoplancton, zooplancton e ictioplancton correspondieron a lo esperado para la zona, con excepción de la estación tres ubicada frente a la isla Puna, donde se observó espuma de color café oscuro distribuida a manera de franja, la cual sería resultado de la proliferacion (6.1 x 106 cel.I-1), del dinoflagelado Prorocentrum mexicanum Tafall (Synonyms Prorocentrum maximun Schiller), especie conocida como cosmopolita,...
Tipo: Journal Contribution
Palavras-chave: Algal blooms; Red tides; Sampling; Plankton.
Ano: 2010
URL: http://hdl.handle.net/1834/4836

Les efflorescences phytoplanctoniques dans le golfe de Gabes (Tunisie) au cours de dix ans de surveillance (1995-205)
Provedor de dados: 20
Autores: Feki, W.; Hamza, A.; Bel Hassen, M.; Rebai, A.
Les données du Réseau National de Surveillance Phytoplanctonique ont été examinées dans le golfe de Gabes durant la période 1995-2005. Un intérêt particulier a été attribué au phénomène de bloom phytoplanctonique. En outre, nous avons examiné plus spécifiquement les variations spatio-temporelles des espèces responsables et les relations avec la variabilité des conditions abiotiques, essentiellement la température, la salinité et le pH. Les résultats ont montré que la période allant d’août à janvier, avec des pics en septembre et janvier, semble être propice à des efflorescences algales. Les dinoflagellés sont responsables de 89% des cas ; l’espèce Karenia selliformis détient à elle seule 64% des occurrences de ce phénomène. Les blooms de K. selliformis,...
Tipo: Journal Contribution
Palavras-chave: Algal blooms; Environmental conditions; Phytoplankton; Salinity; PH.
Ano: 2008
URL: http://hdl.handle.net/1834/4259

Mortandad de caballa Scomber japonicus en la plataforma bonaerense (Mar Argentino)asociada a un florecimiento del dinoflagelado tóxico Alexandrium tamarense.
Provedor de dados: 20
Autores: Montoya, N.G.; Akselman, R.; Pájaro, M.; Perrotta, R.G.; Carreto, J.I.
Spring blooms of the toxic dinoflagellate Alexandrium tamarense in the Argentine sea produce shellfish toxicity through the parallytic shellfish poison (PSP)accumulation. The trace PSP content in the mackerel Scomber japonicus liver was previously demonstrated in the Buenos Aires province coastal region (Carreto et al, 1993a),and a certain capability to accumulate the toxins was suggested.However, it was up to spring 1993 when a great number of PSP intoxicated mackerels where detected for the first time in a wideshelf area off the Buenos Aires province. This area, known as 'El Rincón' (39°00'-40°30'S), has become a growing importance mackerel fishing ground during the last few years. A high PSP concentration was determined in those mackerels, being the...
Tipo: Journal Contribution
Palavras-chave: Toxicity; Algal blooms; Biological poisons; Stomach; Toxicity; Stomach; Algal blooms; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_7422; Http://aims.fao.org/aos/agrovoc/c_32367.
Ano: 1997
URL: http://hdl.handle.net/1834/1939

Studies on Tanzanian hypneaceae: seasonal variation in content and quality of Kappa-Carrageenan from Hypnea musciformis (Gigartinales : Rhodophyta)
Provedor de dados: 20
Autores: Buriyo, A.S.; Mtolera, M.S.P.
Seasonal effects on yield and quality of kappa-carrageenan from the red alga Hypnea musciformis were investigated in samples collected from natural populations in Oyster Bay, Dar es Salaam during June 1996–May 1997. The mean annual carrageenan yield, gel strength (after treatment with 0.1 M KCl) gelling and melting temperature (± standard deviation) were 25.24 ± 4.44 % dry weight, 171.72 ± 41.42 g/cm2, 54.66 ± 3.12 ºC and 68.62 ± 0.60 ºC, respectively. Carrageenan yield and quality (gel strength) during the SE and NE monsoon seasons were not significantly different (t = 0.55, p &gt; 0.05) and (t = 1.91, p &gt; 0.05), respectively. The reported carrageenan yield and gel strength values were, respectively, about 50% and 40% those of carrageenan from...
Tipo: Journal Contribution
Palavras-chave: Mariculture; Algal blooms; Temperature; Algal blooms; Http://aims.fao.org/aos/agrovoc/c_32367.
Ano: 2004
URL: http://hdl.handle.net/1834/1089

Presencia de veneno paralizante de moluscos en higado de caballa de la región costera bonaerense
Provedor de dados: 20
Autores: Carreto, J.I.; Akselman, R.; Cucchi Colleoni, A.D.; Carignan, M.O.; Pájaro, M.
During november 1992 an intense bloom of the toxic dinoflagellate Alexandrium tamarense accurred in coastal waters from Mar del Plata, Argentina. Toxicity testing of Mytilus edulis populations of the region revealed high levels of paralytic shellfish poison. In order to study the possible PSP accumulation in mackerel (Scomber japonicus), mouse bioassay(AOAC) was performed in livers from individuals captured during December 1992. Liver extracts were lethal to mice; the sumptoms observed were typical of those caused by paralytic shellfish toxins. Although PSPS concentration is below the established limit for human consumption, it suggests that mackerel can accumulate PSP toxins from its food. On the basis of stomach content analysis of sampled mackerel and...
Tipo: Journal Contribution
Palavras-chave: Toxicity; Accumulation; Algal blooms; Toxicity; Algal blooms; Http://aims.fao.org/aos/agrovoc/c_7826; Http://aims.fao.org/aos/agrovoc/c_32367.
Ano: 1993
URL: http://hdl.handle.net/1834/2572

Seasonal and Interannual Variations of Surface Nutrients and Hydrography in the Norwegian Sea
Provedor de dados: 20
Autores: Ibrahim, Ahmed.
Seasonal and interannual variations of surface nutrients and hydrography data obtained in period (1997-2010) by the Institute of Marine Research over three transects: Fugl ya-Bj rn ya, Gims y and Svin y located in the Norwegian Sea have been studied. The results over the Fugl ya-Bj rn ya transect show good signature of the seasonal cycle of nitrate and temperature reacting both bloom and post-bloom periods. The Gims y transect shows a weak seasonal cycle of nitrate and temperature in the outer part because there is no enough data during the bloom and post-bloom period. But the middle and inner part show good seasonal cycle of nitrate and temperature during the two periods. Finally, the Svin y transect shows good seasonal cycle of nitrate and temperature...
Tipo: Theses and Dissertations
Palavras-chave: Algal blooms.
Ano: 2012
URL: http://hdl.handle.net/1834/4559

Review of the impact of harmful algae blooms and toxins on the world economy and human health
Provedor de dados: 20
Autores: Ibrahim, A.M.M.
The most common type of harmful algal blooms (HABs) is referred to as a "Red Tide" because the bloom discolors the water, making it appear red. However, HABs may also be yellow, orange, brown, green, white, or pink, depending on which one of the three primary types of phytoplankton are responsible for the problem; dinoflagellate, diatoms, or bluegreen algae. Of the more than 4,400 marine phytoplankton species, only 50 to 60 are believed to be toxic. Many HABs (harmful algal blooms), produce vividly colored blooms of cells that accumulate on surface water. These high biomass blooms can cause hypoxia, can contribute to toxicity of fish and shellfish, and can cause other environmental problems. They occur in waters all over the globe, and have been called red...
Tipo: Journal Contribution
Palavras-chave: A Review; Algal blooms; Algal blooms; Http://aims.fao.org/aos/agrovoc/c_32367.
Ano: 2007
URL: http://hdl.handle.net/1834/1889

Floraciones de Mesodinium rubrum en los procesos de surgencia en el Pacífico Ecuatorial
Provedor de dados: 20
Autores: Jiménez, R.; Gualancañay, E.
El presente trabajo revisa la información concerniente a la posición trófica de M. rubrum en los procesos de surgencia en aguas costeras y océanicas del Ecuador.
Tipo: Journal Contribution
Palavras-chave: Algal blooms; Primary production; Primary production; Algal blooms; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_32367.
Ano: 2006
URL: http://hdl.handle.net/1834/2377

Trends in the distribution of macroalgae in a bleached Kenyan reef ecosystem
Provedor de dados: 20
Autores: Ndirangu, S.; Uku, J.; Muthama, C.
In May 1999, two sites were selected within the Mombasa Marine Park and Reserve for the study of macroalgal succession due to bleaching. One of the sites was Starfish, which lies within the Mombasa Marine Park and is protected from fishing and the other site was Ras Iwatine, which lies in the Reserve area and is Subjected to fishing activities. The study revealed that the Starfish site had a significantly higher hard coral cover, which did not change over the study period. A comparison of the density of macroalgae revealed that a higher proportion of the substrate in Ras Iwatine was dominated by macroalgae. Settlement tiles, used to study algal recruitment, indicated that the succession process in the Starfish site passes through more stages compared to...
Tipo: Working Paper
Palavras-chave: Algal blooms; Coral reefs; Ecosystems.
Ano: 2002
URL: http://hdl.handle.net/1834/123

Calidad ambiental del bloom algal en área urbana del Estero Salado (Ciudad de Guayaquil) en junio 2005
Provedor de dados: 20
Autores: Torres, G.; Palacios, C.
Este artículo tiene como objetivo caracterizar la calidad ambiental físico-química de la marea roja en el Estero Salado en junio del 2005.
Tipo: Journal Contribution
Palavras-chave: Algal blooms; Red tides; Algae; Environmental monitoring; Water quality; Marshes; Environmental monitoring; Water quality; Algal blooms; Algae; Marshes; Http://aims.fao.org/aos/agrovoc/c_37876; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_32367; Http://aims.fao.org/aos/agrovoc/c_258; Http://aims.fao.org/aos/agrovoc/c_4631.
Ano: 2007
URL: http://hdl.handle.net/1834/2363

Study of Inter-annual Variability of Chlorophyll in the Red Sea
Provedor de dados: 20
Autores: Elawad,Abubakr.
This thesis studies and estimates interannual chlorophyll-a concentration in the Red Sea water using SeaWIFS, MERIS and MOIDS data. We use the data of Chlorophyll-a (CHL-a) for the period from 1998 to 2009 as well as other physical parameters such as, sea surface temperature (SST), photosynthetic available radiation (PAR), wind and mixed layer depth (MLD) to study what control the inter-annual variations of phytoplankton blooms in the Red Sea. The area under study is divided into three zones which cover the north, the middle and the south zones of the Red Sea. When considering the data seasonally, the CHL-a shows that blooms alwaysoccur in the Red Sea during winter. For each zone, the start and the end of the blooms are diﬀerent from other zones. During...
Tipo: Theses and Dissertations
Palavras-chave: Algal blooms.
Ano: 2012
URL: http://hdl.handle.net/1834/4558

Les efflorescences phytoplanctoniques dans le golfe de gabes (Tunisie) au cours de dix ans de surveillance (1995-2005)
Provedor de dados: 20
Autores: Feki, W.; Hamza, A.; Bel Hassen, M.; Rebai, A.
Les données du Réseau National de Surveillance Phytoplanctonique ont été examinées dans le golfe de Gabes durant la période 1995-2005. Un intérêt particulier a été attribué au phénomène de bloom phytoplanctonique. En outre, nous avons examiné plus spécifiquement les variations spatio-temporelles des espèces responsables et les relations avec la variabilité des conditions abiotiques, essentiellement la température, la salinité et le pH. Les résultats ont montré que la période allant d’août à janvier, avec des pics en septembre et janvier, semble être propice à des efflorescences algales. Les dinoflagellés sont responsables de 89% des cas ; l’espèce Karenia selliformis détient à elle seule 64% des occurrences de ce phénomène. Les blooms de K. selliformis,...
Tipo: Journal Contribution
Palavras-chave: Algal blooms; Environmental conditions; Phytoplankton; Salinity; Ph; Phytoplankton; Algal blooms; Environmental conditions; Salinity.
Ano: 2008
URL: http://hdl.handle.net/1834/3702

Invasion of the dinoflagellate Ceratium furcoides (Levander) Langhans 1925 at tropical reservoir and its relation to environmental variables
Provedor de dados: 49
Autores: Silva,Lidiane Cristina da; Leone,Isabela Carnielli; Santos-Wisniewski,Maria José dos; Peret,Alberto Carvalho; Rocha,Odete.
Dinoflagellates of the genus Ceratium are chiefly marine but there are rare occurrences in freshwater. In this study we analyze the invasion and progressive establishment of Ceratium furcoides, an exotic species, in the Furnas Reservoir. Samples were taken at 36 points in the reservoir, during the months of March, June, September and December, 2007. Measurements of some physical and chemical variables were simultaneously performed at each site. The occurrence of C. furcoides was registered at 20 sites, with densities varying between 0.57 and 28,564,913.0 ind.m-3. Blooms of this species were recorded in points which were classified as mesotrophic, coinciding with the places receiving high amounts of untreated domestic sewage. C. furcoides density was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Invasive species; Algal blooms; Eutrophication; Reservoir ecology.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000200010

The phytoplankton of Guanabara Bay, Brazil: I. historical account of its biodiversity
Provedor de dados: 49
Autores: Villac,Maria Célia; Tenenbaum,Denise Rivera.
This is a historical account of the biodiversity of phytoplankton in Guanabara Bay, Brazil. It is based on 57 publications that refer to sampling carried out between 1913 and 2004. The publications included are those with direct microscopic identification. Although 80% of the studies focus on ecological issues that tend to mention only the most abundant species, 24 publications provide comprehensive check-lists at the species level, especially of taxa &gt; 20 μm. The inventory of species includes, to date, 308 taxa among 199 diatoms, 90 dinoflagellates, 9 cyanobacteria, 5 euglenophyceans, 1 chlorophycean, 1 prasinophycean, 1 silicoflagellate, and 2 ebriids. The most conspicuous species were the dinoflagellate Scrippsiella trochoidea and diatoms from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Marine microalgae; Diatoms; Dinoflagellates; Cyanobacteria; Algal blooms.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032010000200030