Abstract：
:Environmental changes have been associated with natural climatic variability or human activity. Water resources management is, perhaps, the most drastic change observed in the coastal environment. However, external forcings such as the El Niño event have important implications in the global and regional hydrological balance. These environmental changes have an impact on the density and biomass of the ichthyofauna in the Terminos Lagoon (TL) for the past 30 years, presumably, associated with variations in the temperature and surface salinity of the sea. Therefore, in the present study, δ18O was quantified in otoliths of two important species due to their dominance: Stellifer lanceolatus and Eucinostomus gula, and to understand the environmental changes reflected in both species. The δ18O was analyzed in otoliths of these two species captured in 1998/1997, 2006/2007 and 2016/2017 and were compared with in situ temperature and salinity data. Sea surface temperature and salinity increased by 2 °C and 9, respectively, between 1997 and 2017. Stellifer lanceolatus δ18O values was in isotopic equilibrium with seawater calcite; while, E. gula is not in isotopic equilibrium. The δ18O of S. lanceolatus and E. gula varied significantly with the increase in salinity (R2 = 0.8987 and R2 = -0.2964) and not with the sea surface temperature. S. lanceolatus is an excellent bioindicator of changes in sea surface salinity in this region of the Gulf of Mexico.
journal_name
Mar Environ Resjournal_title
Marine environmental researchauthors
Dorantes-Hernández JM,Torres-Rojas YE,Aguíñiga-García S,Ramos-Miranda J,Trasviña-Carrillo LD,Flores-Hernández D,Sánchez-González Adoi
10.1016/j.marenvres.2020.105135subject
Has Abstractpub_date
2020-10-01 00:00:00pages
105135eissn
0141-1136issn
1879-0291pii
S0141-1136(20)30039-8journal_volume
161pub_type
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