TY - JOUR
T1 - Co-ocurrencia de Chattonella marina y Gymnodinium catenatum en la Bahía de La Paz, Golfo de California (primavera 2009)
AU - López-Cortés, David Javier
AU - Band-Schmidt, Christine Johanna
AU - Gárate-Lizárraga, Ismael
AU - Bustillos-Guzmán, José Jesús
AU - Hernández-Sandoval, Francisco Eduardo
AU - Núñez-Vázquez, Erick Julian
PY - 2011/8
Y1 - 2011/8
N2 - During the period of 24 March to 14 May 2009, water and net samples were obtained for phytoplankton analyses; one aliquot was fixed in Lugol's solution for species quantification and identification. Net samples were used for the identification of live phytoplankton species. Additionally, temperature in situ, chlorophyll a and inorganic nutrients were measured weekly in three stations. Two species were identified: Chattonella marina (Subrahmanyan) Y. Hara et Chihara and Gymnodinium catenatum Graham. Chattonella marina was the most abundant species with a density at subsurface level of 14 × 103 to 36 × 103 cell L-1. Gymnodinium catenatum had densities were of 1 × 103 to 19 × 103 cell L-1. Water column temperature was quasi homogeneous from surface to 20 m in depth, with an interval of 19.5 to 22.0 °C and 20.0 to 21.5 °C from March to April respectively. In the middle of May stratification of the water column initiated with a slight temperature difference of 5.0 °C recorded from surface to 20 m in depth. Nitrates varied from 0.5 to 11.0 μM and orthophosphates from 0.4 to 2.6 μM. Chlorophyll a showed a value at surface level of 7.5 mg m-3 and 3.5 mg m-3 at 20 m in March; in May chlorophyll a values ranged between 2.0 to 7.0 mg m-3. We conclude that the presence of these two species during this study period was associated to the relaxation of the mixing processes in the zone.
AB - During the period of 24 March to 14 May 2009, water and net samples were obtained for phytoplankton analyses; one aliquot was fixed in Lugol's solution for species quantification and identification. Net samples were used for the identification of live phytoplankton species. Additionally, temperature in situ, chlorophyll a and inorganic nutrients were measured weekly in three stations. Two species were identified: Chattonella marina (Subrahmanyan) Y. Hara et Chihara and Gymnodinium catenatum Graham. Chattonella marina was the most abundant species with a density at subsurface level of 14 × 103 to 36 × 103 cell L-1. Gymnodinium catenatum had densities were of 1 × 103 to 19 × 103 cell L-1. Water column temperature was quasi homogeneous from surface to 20 m in depth, with an interval of 19.5 to 22.0 °C and 20.0 to 21.5 °C from March to April respectively. In the middle of May stratification of the water column initiated with a slight temperature difference of 5.0 °C recorded from surface to 20 m in depth. Nitrates varied from 0.5 to 11.0 μM and orthophosphates from 0.4 to 2.6 μM. Chlorophyll a showed a value at surface level of 7.5 mg m-3 and 3.5 mg m-3 at 20 m in March; in May chlorophyll a values ranged between 2.0 to 7.0 mg m-3. We conclude that the presence of these two species during this study period was associated to the relaxation of the mixing processes in the zone.
KW - Bahía of La Paz
KW - Chatonella marina
KW - Gulf of California
KW - Gymnodinium catenatum
KW - Marine phytoplankton
UR - http://www.scopus.com/inward/record.url?scp=84869158489&partnerID=8YFLogxK
M3 - Artículo
SN - 0188-8897
VL - 21
SP - 185
EP - 196
JO - Hidrobiologica
JF - Hidrobiologica
IS - 2
ER -