TY - JOUR
T1 - Variación estacional del zooplancton del embalse Ignacio Allende, Guanajuato, México y su relación con el fitoplancton y factores ambientales
AU - López-López, Eugenia
AU - Serna-Hernández, José Angel
PY - 1999/12
Y1 - 1999/12
N2 - The plankton communities and environmental factors of the Ignacio Allende reservoir were surveyed from July 1990 to June 1991. A total of 57 phytoplankton species were identified. There was a blue green algae bloom in the summer, simultaneously with highest water levels, followed by the dominance of diatoms in the coldest months (February and March). Chlorophyceans became dominant in the spring, consonant with highest temperature records. Bacillariophyceans and cyanophyceans had the greater species richness, while dinophyceans and euglenophyceans had the lowest values. The summer bloom of Anabaena variabilis and the abundance of Ceratium hirundinella, Aulacosseira granulata and Fragilaria crotonensis are associated with tropical eutrophic waters. The zooplankton was composed by 39 species, from these, Diaphanosoma birgei, Bosmina longirostris, Daphnia parvula, Diaptomus (Mastigodiaptomus) montezumae, Acanthocyclops vernalis, Keratella cochlearis, Polyarthra vulgaris and Asplanchna priodonta occurred throughout the annual cycle. A canonical correspondence analysis showed a succesional pattern associated to several environmental processes. The lowest species richness occurred during the dry season, in the coldest months. In the wet season, species richness increased and population densities decreased, consonant with the blue-green algae bloom, the highest values of suspended solids and the highest water levels in the reservoir.
AB - The plankton communities and environmental factors of the Ignacio Allende reservoir were surveyed from July 1990 to June 1991. A total of 57 phytoplankton species were identified. There was a blue green algae bloom in the summer, simultaneously with highest water levels, followed by the dominance of diatoms in the coldest months (February and March). Chlorophyceans became dominant in the spring, consonant with highest temperature records. Bacillariophyceans and cyanophyceans had the greater species richness, while dinophyceans and euglenophyceans had the lowest values. The summer bloom of Anabaena variabilis and the abundance of Ceratium hirundinella, Aulacosseira granulata and Fragilaria crotonensis are associated with tropical eutrophic waters. The zooplankton was composed by 39 species, from these, Diaphanosoma birgei, Bosmina longirostris, Daphnia parvula, Diaptomus (Mastigodiaptomus) montezumae, Acanthocyclops vernalis, Keratella cochlearis, Polyarthra vulgaris and Asplanchna priodonta occurred throughout the annual cycle. A canonical correspondence analysis showed a succesional pattern associated to several environmental processes. The lowest species richness occurred during the dry season, in the coldest months. In the wet season, species richness increased and population densities decreased, consonant with the blue-green algae bloom, the highest values of suspended solids and the highest water levels in the reservoir.
KW - México
KW - Phytoplankton
KW - Reservoir
KW - Seasonality
KW - Tropical
KW - Zooplankton
UR - http://www.scopus.com/inward/record.url?scp=18344407509&partnerID=8YFLogxK
M3 - Artículo
SN - 0034-7744
VL - 47
SP - 643
EP - 657
JO - Revista de Biologia Tropical
JF - Revista de Biologia Tropical
IS - 4
ER -