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	Provedor de dados RChHN (7) Autor MONTECINO,VIVIAN (7) MARTINEZ,GINGER (2) MOLINA,XIMENA (2) RUTLLANT,JOSÉ (2) BUSCHMANN,ALEJANDRO (1) HANNACH,GABRIELA (1) MARTÏNEZ,GINGER (1) OLMEDO,M. ISABEL (1) OLMEDO,MARIA ISABEL (1) ORELLANA,MÓNICA V. (1) PAOLINI,PEDRO (1) PAREDES,M. ALEJANDRA (1) RETAMAL,LEIRA (1) VILA,IRMA (1) Mais... Palavra-chave Coastal upwelling (2) Absorbance (1) Alexandrium catenella (1) Capacidad de carga (1) Chile (1) Cladóceros (1) Coastal trapped waves (1) Coastal-trapped waves (1) Competencia interespecífica (1) Crecimiento (1) ENSO cycle (1) Estrategias alimentarias (1) Growth (1) Local and remote upwelling forcing cycles (1) Nicho trófico (1) Phaeodactylum tricornutum (1) Photoreactivation (1) Photosynthesis (1) Phytoplankton (1) Phytoplankton biomass (1) Mais... Tipo do documento Journal article (7) Ano 2006 (1) 2005 (1) 2002 (1) 2001 (2) 2000 (2) País Chile (7) Idioma Inglês (4) Espanhol (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 7 Primeira ... 1 ... Última Revisiting chlorophyll data along the coast in north-central Chile, considering multiscale environmental variability RChHN MONTECINO,VIVIAN; PAREDES,M. ALEJANDRA; PAOLINI,PEDRO; RUTLLANT,JOSÉ. Phytoplankton abundance in the surface mixed layer of the coastal ocean responds to environmental changes at various time scales. Here the "warm", "cold" and "neutral" phases of "three environmental cycles" have been jointly considered to assess chlorophyll-a (Chl-a) biomass variability for both the active and relaxed phases of the local, wind-driven coastal upwelling: (i) the interannual ENSO cycle (ii) the annual (seasonal) cycle and (iii) the intraseasonal cycle associated with equatorially-sourced, ocean trapped-waves along the coast in northern Chile. The main goal of this study is to quantitatively assess the variability of the depth- integrated Chl-a biomass in the euphotic zone (¾Chl-a) in terms of an overall "environmental condition" over a 50 km... Tipo: Journal article Palavras-chave: Coastal trapped waves; Coastal upwelling; Phytoplankton biomass. Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2006000200007 MINI-SYMPOSIUM ON PHOTOBIOLOGY RChHN MONTECINO,VIVIAN; BUSCHMANN,ALEJANDRO. Tipo: Journal article Ano: 2001 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000200001 Susceptibilidad a la radiación ultravioleta_B del dinoflagelado Alexandrium catenella Kofoid Balech y de la diatomea Phaeodactylum tricornutum Bohlin RChHN MARTINEZ,GINGER; MOLINA,XIMENA; OLMEDO,MARIA ISABEL; MONTECINO,VIVIAN. La susceptibilidad diferencial de microalgas a la radiación UV-B (RUV-B, 280 - 320 nm) genera patrones de predominio numérico dentro de los ensambles del fitoplancton. Sin embargo, a pesar que algunos eventos de floraciones algales nocivas (FAN) del dinoflagelado Alexandrium catenella han sido coincidentes con episodios de alta RUV-B en el extremo sur de Chile, se desconoce alguna relación de causalidad entre estos procesos. A través de los parámetros poblacionales tasa intrínseca de crecimiento (µ) y capacidad de carga (K), se determinó el efecto de la RUV-B sobre la dinámica poblacional de cultivos de A. catenella, la que fue comparada con la respuesta demográfica de cultivos de una diatomea susceptible a la RUV-B, Phaeodactylum tricornutum. Los... Tipo: Journal article Palavras-chave: RUV-B; Alexandrium catenella; Phaeodactylum tricornutum; Crecimiento; Capacidad de carga. Ano: 2000 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000200007 Nibaldo Bahamonde Navarro Profesor Emérito, Universidad de Chile RChHN VILA,IRMA; MONTECINO,VIVIAN. Tipo: Journal article Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2005000100014 Competencia en Cladocera: implicancias de la sobreposición en el uso de los recursos tróficos RChHN MARTINEZ,GINGER; MONTECINO,VIVIAN. A pesar que numerosa evidencia demuestra el uso de diferentes estrategias de alimentación entre cladóceros, la clásica descripción de una conducta alimentaria pasiva ha conducido a una subestimación de la sobreposición de nicho trófico sobre sus patrones de coexistencia. En condiciones de microcosmos, se mantuvieron experimentos pareados de dinámica poblacional de los cladóceros Moina micrura (Moinidae) y Ceriodaphnia dubia (Daphnidae), especializados en los recursos Chlorella sp. y Oocystis sp. (Chlorococcales) respectivamente y del generalista Daphnia ambigua (Daphnidae), durante 35 - 45 días. Mientras que los especialistas M. micrura y C. dubia no dieron evidencias de competencia, la presencia de cada uno produjo un significativo decrecimiento de la... Tipo: Journal article Palavras-chave: Competencia interespecífica; Estrategias alimentarias; Nicho trófico; Cladóceros. Ano: 2000 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2000000400020 Multiscale upwelling forcing cycles and biological response off north-central Chile RChHN RUTLLANT,JOSÉ; MONTECINO,VIVIAN. The physical forcing of the upwelling along the subtropical west coasts of the continents encompasses a broad range of time scales which shape both phytoplankton biomass (Chl-a) and primary productivity (carbon fixation) changes over any given time interval. The narrow continental shelf and the steep alongshore orography off north-central Chile provide for a unique combination of year-round, upwelling-favorable winds with quasi-weekly upwelling pulses associated with atmospheric coastal-trapped disturbances (coastal lows). This variability is modulated by intraseasonal oscillations in the depth of the thermo/nutricline, produced by coastal-trapped waves in the ocean, upon which annual (seasons) and interannual (ENSO) cycles are superimposed. During coastal... Tipo: Journal article Palavras-chave: Chile; Coastal upwelling; Phytoplankton; Local and remote upwelling forcing cycles; Coastal-trapped waves; ENSO cycle. Ano: 2002 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2002000100020 Ecophysiological strategies in response to UV-B radiation stress in cultures of temperate microalgae isolated from the Pacific coast of South America RChHN MONTECINO,VIVIAN; MOLINA,XIMENA; MARTÏNEZ,GINGER; OLMEDO,M. ISABEL; RETAMAL,LEIRA; HANNACH,GABRIELA; ORELLANA,MÓNICA V.. Marine microalgae exposed to ultraviolet radiation (UV) have complex adaptive responses provided by a series of protection and repair mechanisms. Interspecific differences in UV sensibility could result in differential selection of the more tolerant species, having consequences for the structure of phytoplankton assemblages. The relative importance of protection and photorepair mechanisms of microalgal cells exposed to potential UV-B stress was studied in monocultures with different taxonomic, ecological and size characteristics obtained from the Chilean coast. Differences in photosynthesis and growth rates were predicted, since the ability to effectively acclimate to UV is not universal between microalgal species. The dinoflagellate Alexandrium catenella... Tipo: Journal article Palavras-chave: Photosynthesis; Absorbance; Photoreactivation; Growth; UV response. Ano: 2001 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2001000200007 Registros recuperados: 7 Primeira ... 1 ... Última

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