Hydrothermal vent activity is often associated with submarine volcanism. Here, we investigated the presence of microorganisms related to hydrothermal activity in the Orca seamount. Data profiling of the 16S rRNA gene amplicon sequences revealed a diversity pattern dominated mainly by the phyla Proteobacteria, Acidobacteria, Planctomycetes, and Bacteroidetes.

The characteristics of intensity, and untimely of "El Niño 1997-98" answer, manifested by superficial phytoplankton, rocky shore macroalgae, and soft bottom macrobenthos were analyzed from December 1996 to August 1998 in Ancon Bay (11 °46' LS and 77°11' LW). A significative increase of both, temperature since April (17,4°C), and oxygen (2,46 mLL-1)from May 1997 in the bottom of the study area, characterized this event. In superficial phytoplankton, the presence of indicator species of warm oceanic water, and an unusual increase of both dinoflagellate and microflagellate density at the beginning of April 1997 were recorded since January. The density of Chondracanthus chamissoi population reached 2684 ind.x32 m ' of shoreline in October 1997, and the proportion 01 gametophytes increased during 1998. The density and species number 01 soft bottom macrobenthos reached maximum values of 90...

The characteristics of intensity, and untimely of "El Niño 1997-98" answer, manifested by superficial phytoplankton, rocky shore macroalgae, and soft bottom macrobenthos were analyzed from December 1996 to August 1998 in Ancon Bay (11 °46' LS and 77°11' LW). A significative increase of both, temperature since April (17,4°C), and oxygen (2,46 mLL-1)from May 1997 in the bottom of the study area, characterized this event. In superficial phytoplankton, the presence of indicator species of warm oceanic water, and an unusual increase of both dinoflagellate and microflagellate density at the beginning of April 1997 were recorded since January. The density of Chondracanthus chamissoi population reached 2684 ind.x32 m ' of shoreline in October 1997, and the proportion 01 gametophytes increased during 1998. The density and species number 01 soft bottom macrobenthos reached maximum values of 90...