Rodrigo Castro - Profile on Academia.edu (original) (raw)

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CSIC (Consejo Superior de Investigaciones Científicas-Spanish National Research Council)

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Papers by Rodrigo Castro

Research paper thumbnail of 20th century fluctuations in the abundance of siliceous microorganisms preserved in the sediments of the Puyuhuapi Channel (44° S), Chile

Revista Chilena De Historia Natural, 2005

Research paper thumbnail of Fluctuations in export productivity over the last century from sediments of a southern Chilean fjord (44°S

Estuarine Coastal and Shelf Science, 2005

Here we present the first reconstruction of changes in surface primary production during the last... more Here we present the first reconstruction of changes in surface primary production during the last century from the Puyuhuapi fjord in southern Chile, using a variety of parameters (diatoms, biogenic silica, total organic carbon, chlorins, and proteins) as productivity proxies. Two sediment cores from the head and the center of the fjord were analyzed and compared to gain insights on past changes in productivity in these two different depositional environments. Higher sedimentation rates found at the head of the fjord result from the combination of a shallower water column and a restricted circulation by the occurrence of a sill. Additionally, sediment mixing depths estimated from 210 Pb data suggest that suboxic conditions may dominate the bottom water and the sediment-water interface in this location.

Research paper thumbnail of 20th century fluctuations in the abundance of siliceous microorganisms preserved in the sediments of the Puyuhuapi Channel (44° S), Chile

Revista Chilena De Historia Natural, 2005

Research paper thumbnail of Fluctuations in export productivity over the last century from sediments of a southern Chilean fjord (44°S

Estuarine Coastal and Shelf Science, 2005

Here we present the first reconstruction of changes in surface primary production during the last... more Here we present the first reconstruction of changes in surface primary production during the last century from the Puyuhuapi fjord in southern Chile, using a variety of parameters (diatoms, biogenic silica, total organic carbon, chlorins, and proteins) as productivity proxies. Two sediment cores from the head and the center of the fjord were analyzed and compared to gain insights on past changes in productivity in these two different depositional environments. Higher sedimentation rates found at the head of the fjord result from the combination of a shallower water column and a restricted circulation by the occurrence of a sill. Additionally, sediment mixing depths estimated from 210 Pb data suggest that suboxic conditions may dominate the bottom water and the sediment-water interface in this location.

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