TY - JOUR
T1 - Effect of nutrient availability on Macrocystis pyrifera recruitment and survival near its southern limit off Baja California
AU - Hernández-Carmona, G.
AU - Robledo, D.
AU - Serviere-Zaragoza, E.
N1 - Funding Information:
We thank Fernando López and Edgardo Ochoa for their help in underwater activities; the fisheries cooperatives California San Ignacio and Leyes de Re-forma for their help in field sampling; Dr Jose Bus-tillos and IBQ. Guadalupe Avilés for the seawater analysis; Dr Robert Petty and Dr Bill Clinton for CNH analysis and Dr Michael S. Foster for his advice during GHC Ph. D. program. Dr Daniel Reed and Dr Richard Zimmerman are thanked for their critical review of the manuscript, and Dr Michael Graham, M. C. Ignacio Sánchez, M. C. German Ponce and M. C. Oscar Cano for their help in different stages of the work. Dr Ellis Glazier is thanked for editing the English. This work was supported by CONACYT: 4113000-5-029PÑ-1297.
PY - 2001
Y1 - 2001
N2 - The effect of nutrient availability on Macrocystis pyrifera recruitment and survival of juvenile sporophytes was examined at its southern limit off Baja California, Mexico. Nitrate levels were inversely correlated with water temperature (r2 = 0.70) at the experimental location. Low concentrations of nitrate occurred during most of 1998 (< 3 μM) except in spring (4.8-18.8 μM). Experimental seeding with sporophylls and fertilizing the plants with a slow-release inorganic fertilizer produced successful recruitment when the water temperature was declining (18.7 °C). Survival of transplanted juveniles was significantly higher when fertilized during a period of particularly warm water and low nutrients in 1998 caused by El Niño. Analysis of tissue nitrogen suggests that plants were nutrient-limited during this period, and possibly affected synergistically by temperature stress. The results indicate that nutrients directly affect recruitment and survival of giant kelp at its southern limit, particularly during El Niño conditions.
AB - The effect of nutrient availability on Macrocystis pyrifera recruitment and survival of juvenile sporophytes was examined at its southern limit off Baja California, Mexico. Nitrate levels were inversely correlated with water temperature (r2 = 0.70) at the experimental location. Low concentrations of nitrate occurred during most of 1998 (< 3 μM) except in spring (4.8-18.8 μM). Experimental seeding with sporophylls and fertilizing the plants with a slow-release inorganic fertilizer produced successful recruitment when the water temperature was declining (18.7 °C). Survival of transplanted juveniles was significantly higher when fertilized during a period of particularly warm water and low nutrients in 1998 caused by El Niño. Analysis of tissue nitrogen suggests that plants were nutrient-limited during this period, and possibly affected synergistically by temperature stress. The results indicate that nutrients directly affect recruitment and survival of giant kelp at its southern limit, particularly during El Niño conditions.
UR - http://www.scopus.com/inward/record.url?scp=0034964896&partnerID=8YFLogxK
U2 - 10.1515/BOT.2001.029
DO - 10.1515/BOT.2001.029
M3 - Artículo
SN - 0006-8055
VL - 44
SP - 221
EP - 229
JO - Botanica Marina
JF - Botanica Marina
IS - 3
ER -