Distribution of nitrogen-cycling genes in an oxygen-depleted cyclonic eddy in the Alfonso Basin, Gulf of California

2021 ◽  
Author(s):  
Ramiro Ramos-de la Cruz ◽  
Silvia Pajares ◽  
Martín Merino-Ibarra ◽  
María Adela Monreal-Gómez ◽  
Erik Coria-Monter
Keyword(s):  
Nitrogen Cycling ◽  
Gulf Of California ◽  
Cyclonic Eddy

Impact of a Mesoscale Cyclonic Eddy on the Phytoplankton Biomass of Bay of La Paz in the Southern Gulf of California

2021 ◽  
Vol 74 (4) ◽  
Author(s):  
Joselyn Midori Sánchez-Mejía ◽  
María Adela Monreal-Gómez ◽  
Elizabeth Durán-Campos ◽  
David Alberto Salas De León ◽  
Erik Coria-Monter ◽  
...  
Keyword(s):  
Phytoplankton Biomass ◽  
Gulf Of California ◽  
Cyclonic Eddy ◽  
La Paz

Three-dimensional distribution of fish larvae in a cyclonic eddy in the Gulf of California during the summer

2013 ◽  
Vol 75 ◽  
pp. 39-51 ◽  
Author(s):  
L. Sánchez-Velasco ◽  
M.F. Lavín ◽  
S.P.A. Jiménez-Rosenberg ◽  
V.M. Godínez ◽  
E. Santamaría-del-Angel ◽  
...  
Keyword(s):  
Gulf Of California ◽  
Fish Larvae ◽  
Three Dimensional ◽  
Cyclonic Eddy ◽  
Dimensional Distribution ◽  
Distribution Of Fish

scholarly journals Vertical distribution of calanoid copepods in a mature cyclonic eddy in the Gulf of California

Crustaceana ◽  
2018 ◽  
Vol 91 (1) ◽  
pp. 63-84 ◽  
Author(s):  
Javier Cruz-Hernández ◽  
Laura Sánchez-Velasco ◽  
Victor M. Godínez ◽  
Emilio Beier ◽  
José R. Palomares-García ◽  
...  
Keyword(s):  
Vertical Distribution ◽  
Water Column ◽  
Mixed Layer ◽  
Gulf Of California ◽  
Calanoid Copepod ◽  
Cyclonic Eddy ◽  
Surface Mixed Layer ◽  
Calanoid Copepods ◽  
Mature Phase ◽  
Water Column Stratification

The distribution of calanoid copepod habitats in a cyclonic eddy in the Gulf of California was examined. Direct velocity observations revealed that the eddy extended to approximately 550 m depth and 150 km diameter. The established thermocline suggested that active vertical pumping was not occurring because the eddy was in mature phase. A copepod habitat located in the surface mixed layer, showed high abundances, dominated by Subeucalanus subtenuis (Giesbrecht, 1888), whose abundances decrease towards the centre of the eddy. A second habitat, situated in thermocline, had the highest abundances dominated by Nannocalanus minor (Claus, 1863) and Temora discaudata Giesbrecht, 1889. Another habitat, beneath the thermocline, was dominated by most of species recorded in thermocline, but with the lowest abundance. Results suggest that in the mature phase of a cyclonic eddy, the water column stratification induces layering of the calanoid copepod habitats, with the most propitious conditions for their feeding in thermocline.

Copepod abundance distribution in relation to a cyclonic eddy in a coastal environment in the southern Gulf of California

2021 ◽  
Vol 222 ◽  
pp. 104436
Author(s):  
Franco Antonio Rocha-Díaz ◽  
María Adela Monreal-Gómez ◽  
Erik Coria-Monter ◽  
David Alberto Salas-de-León ◽  
Elizabeth Durán-Campos ◽  
...  
Keyword(s):  
Gulf Of California ◽  
Coastal Environment ◽  
Cyclonic Eddy ◽  
Abundance Distribution ◽  
Copepod Abundance

scholarly journals Seasonal variability in copepod biomass in a cyclonic eddy in the Bay of La Paz, southern Gulf of California, Mexico

2020 ◽  
Author(s):  
Franco Antonio Rocha Díaz ◽  
María Adela Monreal Gómez ◽  
Erik Coria Monter ◽  
David Alberto Salas de León ◽  
Elizabeth Durán Campos
Keyword(s):  
Water Column ◽  
Chlorophyll A ◽  
Gulf Of California ◽  
Feeding Habits ◽  
Mesoscale Eddy ◽  
Circulation Pattern ◽  
Cyclonic Eddy ◽  
La Paz ◽  
The Impact ◽  
Copepod Biomass

AbstractAs one of the main groups composing marine zooplankton, copepods play an important role due to the position they occupy in the trophic web. Study of their biomass and relationship with the physical conditions of the water column are essential in order to evaluate the trophic structure and functions of any aquatic ecosystem. As a contribution to this topic, we assessed the copepod biomass inside a cyclonic eddy system during two different seasons in the Bay of La Paz in the southern Gulf of California, a region characterized by high biological productivity. Two oceanographic expeditions took place in the winter of 2006 and summer of 2009 on which a conductivity-temperature-depth (CTD) probe was used to determine the physical structure of the water column and oblique zooplankton hauls collected zooplankton samples. Satellite data were used to visualize chlorophyll-a distribution patterns. The results showed the presence of a well-defined mesoscale cyclonic eddy in both seasons, with high chlorophyll-a (CHLA) values at the edges of the eddy. Maximum values for copepod biomass were observed in winter and their distribution corresponded well with the circulation pattern and the CHLA values, forming a belt shape following the periphery of the eddy. The results presented herein highlight the impact of the mesoscale eddy on the planktonic ecosystem through its influence on hydrographic conditions in the water column. Other factors, such as ecological interactions, population dynamics, and feeding habits may play a role as well. Feeding behavior in particular is affected by high CHLA concentrations observed around the eddy which represent a source of food for these organisms.

scholarly journals Differential distribution of diatoms and dinoflagellates in a cyclonic eddy confined in the Bay of La Paz, Gulf of California

2014 ◽  
Vol 119 (9) ◽  
pp. 6258-6268 ◽  
Author(s):  
Erik Coria-Monter ◽  
María Adela Monreal-Gómez ◽  
David Alberto Salas-de-León ◽  
Javier Aldeco-Ramírez ◽  
Martín Merino-Ibarra
Keyword(s):  
Gulf Of California ◽  
Cyclonic Eddy ◽  
Differential Distribution ◽  
La Paz

Dissolved oxygen and temperature best predict deep-sea fish community structure in the Gulf of California with climate change implications

2020 ◽  
Vol 637 ◽  
pp. 159-180
Author(s):  
ND Gallo ◽  
M Beckwith ◽  
CL Wei ◽  
LA Levin ◽  
L Kuhnz ◽  
...  
Keyword(s):  
Climate Change ◽  
Community Structure ◽  
Community Composition ◽  
Environmental Conditions ◽  
Deep Sea ◽  
Gulf Of California ◽  
Fish Community ◽  
Demersal Fish ◽  
Fish Community Structure ◽  
Explained Variance

Natural gradient systems can be used to examine the vulnerability of deep-sea communities to climate change. The Gulf of California presents an ideal system for examining relationships between faunal patterns and environmental conditions of deep-sea communities because deep-sea conditions change from warm and oxygen-rich in the north to cold and severely hypoxic in the south. The Monterey Bay Aquarium Research Institute (MBARI) remotely operated vehicle (ROV) ‘Doc Ricketts’ was used to conduct seafloor video transects at depths of ~200-1400 m in the northern, central, and southern Gulf. The community composition, density, and diversity of demersal fish assemblages were compared to environmental conditions. We tested the hypothesis that climate-relevant variables (temperature, oxygen, and primary production) have more explanatory power than static variables (latitude, depth, and benthic substrate) in explaining variation in fish community structure. Temperature best explained variance in density, while oxygen best explained variance in diversity and community composition. Both density and diversity declined with decreasing oxygen, but diversity declined at a higher oxygen threshold (~7 µmol kg-1). Remarkably, high-density fish communities were observed living under suboxic conditions (<5 µmol kg-1). Using an Earth systems global climate model forced under an RCP8.5 scenario, we found that by 2081-2100, the entire Gulf of California seafloor is expected to experience a mean temperature increase of 1.08 ± 1.07°C and modest deoxygenation. The projected changes in temperature and oxygen are expected to be accompanied by reduced diversity and related changes in deep-sea demersal fish communities.

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