TY - JOUR
T1 - Effect of nutrient availability on understory algae during El Niño Southern Oscillation (ENSO) conditions in Central Pacific Baja California
AU - Hernández-Carmona, Gustavo
AU - Riosmena-Rodríguez, Rafael
AU - Serviere-Zaragoza, Elisa
AU - Ponce-Díaz, Germán
N1 - Funding Information:
Acknowledgments The researchers from IPN-CICIMAR (GHC, and GPD), wish to express their thanks for the fellowship granted under the program of exclusivity (“Beca de exclusividad”) of the “Comisión de Operación y Fomento de Actividades Académicas del IPN (COFAA)” and also the program “Estímulo al Desempeño de los Investigadores del IPN (EDI)”. This research was supported with funds from the “Secretaría de Investigación y Posgrado” of the IPN and CONACYT (4113000-5-029PÑ-1297). Also, the authors wish to express their gratitude to Mr. Kim Siewers for editing the manuscript.
PY - 2011/6
Y1 - 2011/6
N2 - An experimental study of the effect of artificial nutrient supply on understory algae was made during 1997 El Niño Southern Oscillation (ENSO) at the Mexican Pacific coast of Baja California. Twelve quadrats of 1 m2 were placed on the sea bed. Six quadrats were used as controls, and six were treatments with added artificial nutrients. Nutrients were supplied using polyvinyl chloride (PVC) pipes filled with slow-release inorganic fertilizer. The algae species composition and cover in each quadrat were estimated using the random point quadrat method. The percent of cover was tested using a multifactorial analysis of variance, and significant differences were obtained by post hoc Tukey's HSD test. The analysis was carried out annually, seasonally, and seasonal and monthly for each species. The seawater temperature was recorded, and compared with historical data. The bottom and surface seawater nitrate concentration were measured. Twenty-five species of macroalgae and one seagrass were identified. The most abundant species was Corallina vancouveriensis (-N=19.8% and +N=26.6% average cover). The other species had lower than 10% cover. Significant differences of species percent cover between experimental groups (+N and -N) were detected in the annual analysis (p=0.059). Seasonal analysis did not showed significant differences for any season. Monthly analysis showed significant differences in average percent cover when nutrients were added in eight species in different months: Bossiella orbigniana (August); Colpomenia sinuosa (June); Corallina officinalis (August); C. vancouveriensis (June); Dictyota flabellata (September); Eisenia arborea (June); Gracilaria marcialana (June); Macrocystis pyrifera (October), and the seagrass Phyllospadix torreyi (September and December). In conclusion, not all seaweed species are sensitive to nutrient addition during the ENSO years. In this research, we found eight species and one seagrass that had a positive reaction to the nutrients during the most severe stage (summer) of the ENSO.
AB - An experimental study of the effect of artificial nutrient supply on understory algae was made during 1997 El Niño Southern Oscillation (ENSO) at the Mexican Pacific coast of Baja California. Twelve quadrats of 1 m2 were placed on the sea bed. Six quadrats were used as controls, and six were treatments with added artificial nutrients. Nutrients were supplied using polyvinyl chloride (PVC) pipes filled with slow-release inorganic fertilizer. The algae species composition and cover in each quadrat were estimated using the random point quadrat method. The percent of cover was tested using a multifactorial analysis of variance, and significant differences were obtained by post hoc Tukey's HSD test. The analysis was carried out annually, seasonally, and seasonal and monthly for each species. The seawater temperature was recorded, and compared with historical data. The bottom and surface seawater nitrate concentration were measured. Twenty-five species of macroalgae and one seagrass were identified. The most abundant species was Corallina vancouveriensis (-N=19.8% and +N=26.6% average cover). The other species had lower than 10% cover. Significant differences of species percent cover between experimental groups (+N and -N) were detected in the annual analysis (p=0.059). Seasonal analysis did not showed significant differences for any season. Monthly analysis showed significant differences in average percent cover when nutrients were added in eight species in different months: Bossiella orbigniana (August); Colpomenia sinuosa (June); Corallina officinalis (August); C. vancouveriensis (June); Dictyota flabellata (September); Eisenia arborea (June); Gracilaria marcialana (June); Macrocystis pyrifera (October), and the seagrass Phyllospadix torreyi (September and December). In conclusion, not all seaweed species are sensitive to nutrient addition during the ENSO years. In this research, we found eight species and one seagrass that had a positive reaction to the nutrients during the most severe stage (summer) of the ENSO.
KW - Baja California Sur
KW - El Niño Southern Oscillation
KW - Nutrients
KW - Seawater temperature
KW - Understory algae
UR - http://www.scopus.com/inward/record.url?scp=79958770333&partnerID=8YFLogxK
U2 - 10.1007/s10811-011-9656-5
DO - 10.1007/s10811-011-9656-5
M3 - Artículo
SN - 0921-8971
VL - 23
SP - 635
EP - 642
JO - Journal of Applied Phycology
JF - Journal of Applied Phycology
IS - 3
ER -