A review of eastern tropical Pacific oceanography: Summary

Lavín, Miguel F.; Fiedler, Paul C.; Amador, Jorge A.; Ballance, Lisa T.; Färber-Lorda, Jaime; Mestas-Nuñez, Alberto M.

doi:10.1016/j.pocean.2006.03.005

Cited by 73 publications

(56 citation statements)

References 30 publications

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“…Diversity patterns of bycatch assemblages in both fishing modes in the eastern tropical Pacific match reasonably well with the principal characteristics of its oceanography, hydrography and circulation (Fiedler and Talley, 2006;Kessler, 2006;Lavín et al, 2006;Pennington et al, 2006). In the case of the environmental variables, the sea surface temperature and chlorophyll were the environment predictors that better explained diversity patterns (Table 3).…”

Section: Geographical and Habitat Characteristics Of Bycatch Assemblagessupporting

confidence: 59%

Biodiversity and Habitat Characteristics of the Bycatch Assemblages in Fish Aggregating Devices (FADs) and School Sets in the Eastern Pacific Ocean

et al. 2017

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This study examined diversity and habitat characteristics for bycatch assemblages in two different types of fishing (drifting fish aggregating devices sets and sets made on school of tunas) in the eastern Pacific Ocean (20 • S-30 • N and 70 • -150 • W) between 2005 and 2011 using biodiversity metrics and Generalized Additive Models. Bycatch information was based on data collected by onboard observers covering more than 80% of the purse seine fishing trips. Our results suggest that diversity and habitat characteristics of the bycatch assemblages differ depending of the fishing mode. Thus, diversity was mostly explained by area and set type; being higher in fish aggregating devices (FAD) sets than School sets. Concretely, diversity seems to be directly related with the equatorial upwelling and the front system in FAD sets and with the Costa Rica Dome and the coastal upwelling of Panama induced by wind jets in School sets. Among environmental variables, temperature and chlorophyll were the most important predictors to describe the diversity of the bycatch assemblages. This work has investigated multiple indicators related to the bycatch assemblages and their habitat, which could be helpful for the development of an Ecosystem Approach to Fishery Management (EAFM).

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Section: Geographical and Habitat Characteristics Of Bycatch Assemblagessupporting

confidence: 59%

Biodiversity and Habitat Characteristics of the Bycatch Assemblages in Fish Aggregating Devices (FADs) and School Sets in the Eastern Pacific Ocean

et al. 2017

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“…The ETNP ODZ comprises part of the North Pacific subtropical gyre; specifically, it is delimited southeastern by the California Current (CC), the North Equatorial Current (NEC) and the North Equatorial Countercurrent (NECC) (Karstensen et al, 2008). The boundary area where the CC, flowing along the coast of the Baja California and northern Mexico, encounters the NEC is characterized by Ekman transport westward and upwelling mainly off the Californian coast and in a weakened magnitude off the northern Mexico coast (Kessler, 2006;Lavín et al, 2006). Our sampling area lies in this transition region; however the upper water circulation in this region is not yet fully understood (Kessler, 2006).…”

Section: Environmental Setting Of the Etnpmentioning

confidence: 99%

Intact polar lipids of Thaumarchaeota and anammox bacteria as indicators of N cycling in the eastern tropical North Pacific oxygen-deficient zone

et al. 2015

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Abstract. In the last decade our understanding of the marine nitrogen cycle has improved considerably thanks to the discovery of two novel groups of microorganisms: ammoniaoxidizing archaea (AOA) and anaerobic ammonia-oxidizing (anammox) bacteria. Both groups are important in oxygendeficient zones (ODZs), where they substantially affect the marine N budget. These two groups of microbes are also well known for producing specific membrane lipids, which can be used as biomarkers to trace their presence in the environment. We investigated the occurrence and distribution of AOA and anammox bacteria in the water column of the eastern tropical North Pacific (ETNP) ODZ, one of the most prominent ODZs worldwide. Suspended particulate matter (SPM) was collected at different depths of the water column in high resolution, at both a coastal and an open-ocean setting. The SPM was analyzed for AOA-and anammox bacteria-specific intact polar lipids (IPLs), i.e., hexose-phosphohexose (HPH)-crenarchaeol and phosphatidylcholine (PC)-monoether ladderane. Comparison with oxygen profiles reveals that both the microbial groups are able to thrive at low ( < 1 µM) concentrations of oxygen. Our results indicate a clear niche segregation of AOA and anammox bacteria in the coastal waters of the ETNP but a partial overlap of the two niches of these microbial species in the open-water setting. The latter distribution suggests the potential for an interaction between the two microbial groups at the open-ocean site, although the nature of this hypothetical interaction (i.e., either competition or cooperation) remains unclear.

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“…Por el contrario, Giraldo, et al [5] plantean que este enfriamiento estacional es consecuencia de la respuesta oceánica a un forzante atmosférico del POT. En el sector oriental del Océano Pacífico han sido descritos tres forzantes atmosféricos principales: el chorro de viento de Panamá (diciembre abril), el chorro de viento del Chocó (octubre -noviembre) y el cinturón de convergencia intertropical (19)(20)(21). Cuando los vientos Alisios del norte se intensifican, el chorro de viento de Panamá afecta drásticamente la capa de influencia friccional del Panama Bight, provocando una consecuente respuesta oceánica en forma de una extensa lengua de surgencia que puede extenderse desde los 7º N hasta la zona ecuatorial [6,7,22].…”

Section: Giraldo:variabilidad Termohalina En El Pnn Gorgonaunclassified

Variabilidad espacial de temperatura, salinidad y transparencia en el ambiente pelágico del PNN Gorgona durante septiembre 2007 y marzo 2008

Giraldo¹

2008

BCCIOH

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ResumenCon el propósito de describir la variabilidad espacial y temporal de la temperatura, salinidad y transparencia en el ambiente pelágico de Isla Gorgona se realizaron dos campañas de muestreo oceanográfico, una en septiembre de 2007 y la otra en marzo de 2008, a lo largo de una malla de 24 estaciones. En cada estación, se registró la temperatura y salinidad desde la superficie hasta 50 m o el fondo utilizando una CTD Seabird-19, y se registró la transparencia del agua utilizando un disco Secchi. Se detectaron diferencias significativas temporales y espaciales en la temperatura, salinidad y transparencia en la columna de agua. En términos generales durante septiembre el agua fue más cálida, menos salina y más transparente que durante marzo (Anova, p < 0.05). De otro lado, aunque no se detectaron diferencias significativas en la temperatura y salinidad superficial entre el sector oriental y occidental de la isla (Anova, p > 0.13), se estableció que a 10 m de profundidad el agua es significativamente más cálida y salina en el sector occidental de Isla Gorgona (Anova, p < 0.02).Palabras claves: Oceanografía costera, observaciones STD, perfiles CTD, aguas costeras, islas.In order to describe the spatial and temporal variability of temperature, salinity and water column transparency, two oceanographic campaigns were carried out, the first one in September 2007 and the second one in March 2008, along 24 sampling station grid. Temperature and salinity in each station from surface to 50 m or bottom was registered using a Seabird-19 CTD, and the water column transparency was measured using a Secchi disk. Spatial and temporal significant differences of temperature, salinity and transparency were detected in the study area. In general terms, the water was warmer, less saline and more transparent during September than during March (Anova, p < 0.05). On the other hand, although no significant differences of surface temperature and salinity were detected among eastern and western side of the island isla (Anova, p > 0.13), at 10 m depth the water was warmer and more saline in the western than in the eastern side (Anova, p < 0.02).

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A review of eastern tropical Pacific oceanography: Summary

Cited by 73 publications

References 30 publications

Biodiversity and Habitat Characteristics of the Bycatch Assemblages in Fish Aggregating Devices (FADs) and School Sets in the Eastern Pacific Ocean

Biodiversity and Habitat Characteristics of the Bycatch Assemblages in Fish Aggregating Devices (FADs) and School Sets in the Eastern Pacific Ocean

Intact polar lipids of Thaumarchaeota and anammox bacteria as indicators of N cycling in the eastern tropical North Pacific oxygen-deficient zone

Variabilidad espacial de temperatura, salinidad y transparencia en el ambiente pelágico del PNN Gorgona durante septiembre 2007 y marzo 2008

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