%0 Journal Article
%T The relationships between Chlorophyll-A and oceanographic variables in the periglacial area of the Seno Gallegos (Cordillera Darwin, Chile): under winter conditions Relaci車n entre Clorofila-A y las variables oceanogr芍ficas en el 芍rea preglaciar del Seno Gallegos (Cordillera Darwin, Chile): bajo condiciones invernales
%A Osvaldo V芍squez
%A Santiago Pineda
%A Eduardo Quiroga
%A Bibiana Jara
%J Anales del Instituto de la Patagonia
%D 2012
%I Universidad de Magallanes
%X The relationships between chlorophyll a concentration, physical-chemical variables (temperature, salinity, density, total suspended particulate matter) and nutrients (silicate, nitrate, nitrite and phosphate) were determined in the marine periglacial area of the Gallegos sound (54∼ 28'58''S - 69∼ 50'55''W) in August 2010 (austral winter). Twelve stations were studied out directly from the glacier edge to mouth of the sound. At each station, a CTD was deployed and water samples were collected. The water tempera-tures ranged from 3.74 to 6.55 ∼C, the salinity from 28.39 to 30.14 psu and chlorophyll a concentrations varied from 0.24 to 2.69 mg m-3; the total particulate matter concentrations varied between 0.12 and 14.0 mg L-1. The silicate concentrations varied between 2.58 and 9.57 米M, phosphate between 0.01 and 8.02 米M, and nitrate and nitrite values ranged from 0.02 to 30.34 米M and 0.01 to 2.99 米M, respectively. The chlorophyll a concentration in the sound was significantly correlated with depth, total particulate matter and density (老 = 0.477), whereas lower correlation values resulted with silicate and phosphate (老 = 0.463). The lowest significant correlation value was observed with nitrate concentrations (老 = 0.397). Our result suggest that the water column stratification is linked to total particular matter maintaining high chlorophyll a concentrations in the euphotic layer of this cold water estuarine system. Se determin車 la relaci車n entre la concentraci車n de clorofla a, las variables f赤sico-qu赤micas (temperatura, salinidad, densidad y solidos totales suspendidos) y nutrientes (silicatos, nitratos, nitritos y fosfatos) en el 芍rea periglaciar de seno Gallegos (54∼ 28'58''S - 69∼ 50'55'' W) en agosto del 2010 (invierno austral). Doce estaciones fueron estudiadas directamente desde el borde glaciar a la boca del seno Gallegos. En cada una de las estaciones se realizaron lances de CTD y se colectaron muestras de agua. La columna de agua en seno Gallegos present車 un rango de temperatura de 3,74 ∼C a 6,55 ∼C, el rango de salinidad fue de 28,39 a 30,14 psu y las concentraciones de clorofla a variaron desde 0,24 hasta 2,69 mg m-3; la concentraci車n de solidos totales suspendidos vari車 entre 0,12 y 14,0 mg L-1. Las concentraciones de silicato variaron entre 2,58 hasta 9,57 米M, los fosfatos variaron de 0,01 a 8,02 米M, mientras que los valores de nitratos y nitritos variaron de 0,02 a 30,34 米M y 0,01 a 2,99 米M, respectivamente. Las concentraciones de clorofla a en el seno se correlacionaron significativamente con la profundidad, solidos totales suspendidos y
%K bah赤a Brookes
%K Patagonia
%K oceanograf赤a
%K s車lidos suspendidos
%K estuario
%K Brookes Bay
%K Patagonia
%K oceanography
%K particulate matter
%K estuarine
%U http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-686X2012000100018