TY - JOUR
T1 - Macroalgae blooms and δ15N in subtropical coastal lagoons from the Southeastern Gulf of California
T2 - Discrimination among agricultural, shrimp farm and sewage effluents
AU - Piñón-Gimate, Alejandra
AU - Soto-Jiménez, Martín F.
AU - Ochoa-Izaguirre, María Julia
AU - García-Pagés, Eynar
AU - Páez-Osuna, Federico
N1 - Funding Information:
We thank Clara Ramírez-Jauregui for help with bibliography and Omar Hernández Tovalin for assistance during collecting samples. We also thank German Ramírez and Carlos Suarez for preparing the maps of the region. We thank Jim Marlatt for the English revision. This work was supported by the CONACYT-SEMARNAT Project 2002-C01-0161 and PAPIIT-UNAM IN215206. Thanks for the logistical help from the Instituto de Ciencias del Mar y Limnología, UNAM.
PY - 2009/8
Y1 - 2009/8
N2 - Macroalgae blooms of Gracilaria vermiculophylla, Hypnea spinella and Spyridia filamentosa have been found in coastal lagoons in the SE Gulf of California. Agriculture, livestock, shrimp and poultry farms and sewage contribute anthropogenic nitrogen to the systems. The δ15N of these sources, water column and macroalgae were studied in order to identify the N supply for macroalgae blooms. δ15N of three species of macroalgae (4.3-13.6‰) were enriched compared to the water column (δ 15 N s(-) NO3 - 3.7-6.8‰), probably because of fractioning from the macroalgae. δ15N of POM (1.4-10.3‰) was similar to the water column but the relationship was unclear. Depending on the site, macroalgae showed different δ15N values since some sites receive more or less influence from one given source of the associated watershed, which is reflected in the different δ15N values of the macroalgae of the same system and in the relative contributions of the sources.
AB - Macroalgae blooms of Gracilaria vermiculophylla, Hypnea spinella and Spyridia filamentosa have been found in coastal lagoons in the SE Gulf of California. Agriculture, livestock, shrimp and poultry farms and sewage contribute anthropogenic nitrogen to the systems. The δ15N of these sources, water column and macroalgae were studied in order to identify the N supply for macroalgae blooms. δ15N of three species of macroalgae (4.3-13.6‰) were enriched compared to the water column (δ 15 N s(-) NO3 - 3.7-6.8‰), probably because of fractioning from the macroalgae. δ15N of POM (1.4-10.3‰) was similar to the water column but the relationship was unclear. Depending on the site, macroalgae showed different δ15N values since some sites receive more or less influence from one given source of the associated watershed, which is reflected in the different δ15N values of the macroalgae of the same system and in the relative contributions of the sources.
KW - Macroalgae blooms
KW - Nitrogen content
KW - Nitrogen sources
KW - δN
UR - http://www.scopus.com/inward/record.url?scp=67651122923&partnerID=8YFLogxK
U2 - 10.1016/j.marpolbul.2009.04.004
DO - 10.1016/j.marpolbul.2009.04.004
M3 - Artículo
C2 - 19442992
SN - 0025-326X
VL - 58
SP - 1144
EP - 1151
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
IS - 8
ER -