scholarly journals The Pacific Wing-Oyster, Pteria sterna, off San Diego, California

The Festivus ◽  
2021 ◽  
Vol 53 (4) ◽  
pp. 288-292
Author(s):  
Paul Tuskes
Keyword(s):  
San Diego ◽  
Baja California ◽  
Pearl Oyster ◽  
Range Extension ◽  
Mission Bay ◽  
The Pacific ◽  
Transient Population ◽  
The Status ◽  
Gorgonian Corals ◽  
Continuous Presence

Pteria sterna is an eastern Pacific pearl oyster of commercial value from Peru to central Baja California, Mexico. The continuous presence of this species in San Diego for a decade is unique as it is approximately 600 km north of the expected range for the species. A minimum of three generations are present in Mission Bay at any point in time and the preferred substrate for attachment are gorgonian corals. The species is also found off shore in cooler water. The continued presence of this oyster raises the question as to the status of this population; is it a permanent range extension or simply a transient population and what has changed that allowed its continued presence?

scholarly journals The evolving response of mesopelagic fishes to declining midwater oxygen concentrations in the southern and central California Current

2018 ◽  
Vol 76 (3) ◽  
pp. 626-638 ◽  
Author(s):  
J Anthony Koslow ◽  
Pete Davison ◽  
Erica Ferrer ◽  
S Patricia A Jiménez Rosenberg ◽  
Gerardo Aceves-Medina ◽  
...  
Keyword(s):  
Baja California ◽  
Southern Oscillation ◽  
Global Climate ◽  
California Current ◽  
Deep Ocean ◽  
Near Surface ◽  
Oxygen Minimum Zones ◽  
The North ◽  
The Pacific ◽  
Oxygen Concentrations

Abstract Declining oxygen concentrations in the deep ocean, particularly in areas with pronounced oxygen minimum zones (OMZs), are a growing global concern related to global climate change. Its potential impacts on marine life remain poorly understood. A previous study suggested that the abundance of a diverse suite of mesopelagic fishes off southern California was closely linked to trends in midwater oxygen concentration. This study expands the spatial and temporal scale of that analysis to examine how mesopelagic fishes are responding to declining oxygen levels in the California Current (CC) off central, southern, and Baja California. Several warm-water mesopelagic species, apparently adapted to the shallower, more intense OMZ off Baja California, are shown to be increasing despite declining midwater oxygen concentrations and becoming increasingly dominant, initially off Baja California and subsequently in the CC region to the north. Their increased abundance is associated with warming near-surface ocean temperature, the warm phase of the Pacific Decadal oscillation and Multivariate El Niño-Southern Oscillation Index, and the increased flux of Pacific Equatorial Water into the southern CC.

scholarly journals Served on a Plate: Engraved Sources of San Diego de Alcalá’s ‘Miraculous Meal’ for the Franciscans of Santiago, Chile (ca. 1710)

Arts ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 30
Author(s):  
Catherine Burdick
Keyword(s):  
Professional Practice ◽  
San Diego ◽  
Academic Literature ◽  
The Status ◽  
The Subject

There exists a consensus in academic literature regarding the centrality of engraved prototypes for the production of colonial paintings in the Spanish Americas. In Peru, these artistic models were written into legal contracts between painters and clients. An examination of the notarial contracts produced in Cusco from 1650 to 1700 suggests that prototypes in a variety of formats were not only central to artistic professional practice, but that adherence to their images may have provided one motive for entering into such agreements. This study leans upon the centrality of Flemish print sources to confirm the attribution of a partial canvas at the Pinacoteca Universidad de Concepción, Chile as an episode of the series on the life of Diego de Alcalá (c. 1710) in Santiago, Chile. Commissioned from Cusco by the Franciscans of Santiago, the status of the hagiographic cycle as the most extensive ever produced on the subject of this missionary saint dictates that a multiplicity of sources was necessary for its creation. By identifying two engravings that served as its models, this study recovers the subject of this painting as a miracle that sustained Diego during an arduous journey.

scholarly journals Prevalence and Correlates of Heroin–Methamphetamine Co-Injection Among Persons Who Inject Drugs in San Diego, California, and Tijuana, Baja California, Mexico

2016 ◽  
Vol 77 (5) ◽  
pp. 774-781 ◽  
Author(s):  
Meredith C. Meacham ◽  
Steffanie A. Strathdee ◽  
Gudelia Rangel ◽  
Richard F. Armenta ◽  
Tommi L. Gaines ◽  
...  
Keyword(s):  
San Diego ◽  
Baja California ◽  
Persons Who Inject Drugs

scholarly journals Distribution and nutrient limitation of surfgrass, Phyllospadix scouleri and Phyllospadix torreyi, along the Pacific coast of Baja California (México)

2002 ◽  
Vol 74 (2) ◽  
pp. 121-131 ◽  
Author(s):  
P. Ramı́rez-Garcı́a ◽  
J. Terrados ◽  
F. Ramos ◽  
A. Lot ◽  
D. Ocaña ◽  
...  
Keyword(s):  
Nutrient Limitation ◽  
Baja California ◽  
Pacific Coast ◽  
The Pacific

Horizontal movements, vertical-habitat utilization and diet of the jumbo squid (Dosidicus gigas) in the Pacific Ocean off Baja California Sur, Mexico

2010 ◽  
Vol 86 (1-2) ◽  
pp. 59-71 ◽  
Author(s):  
Gastón Bazzino ◽  
William F. Gilly ◽  
Unai Markaida ◽  
César A. Salinas-Zavala ◽  
Jorge Ramos-Castillejos
Keyword(s):  
Pacific Ocean ◽  
Baja California ◽  
Habitat Utilization ◽  
Baja California Sur ◽  
Dosidicus Gigas ◽  
Jumbo Squid ◽  
The Pacific ◽  
The Pacific Ocean

scholarly journals MIS 5e sea-level history along the Pacific Coast of North America

2021 ◽  
Author(s):  
Daniel R. Muhs
Keyword(s):  
North America ◽  
Sea Level ◽  
Baja California ◽  
Pacific Coast ◽  
Level Indicator ◽  
Sequence Of Events ◽  
Marine Terraces ◽  
The Pacific ◽  
Mis 5E ◽  
Good Agreement

Abstract. The primary last interglacial, marine isotope substage (MIS) 5e records on the Pacific Coast of North America, from Washington (USA) to Baja California Sur (Mexico), are found in the deposits of erosional marine terraces. Warmer coasts along the southern Golfo de California host both erosional marine terraces and constructional coral reef terraces. Because the northern part of the region is tectonically active, MIS 5e terrace elevations vary considerably, from a few meters above sea level to as much as 70 m above sea level. The primary paleo-sea level indicator is the shoreline angle, the junction of the wave-cut platform with the former sea cliff, which forms very close to mean sea level. Most areas on the Pacific Coast of North America have experienced uplift since MIS 5e time, but the rate of uplift varies substantially as a function of tectonic setting. Chronology in most places is based on uranium-series ages of the solitary coral Balanophyllia elegans (erosional terraces) or the colonial corals Porites and Pocillopora (constructional reefs). In areas lacking corals, correlation to MIS 5e can sometimes be accomplished using amino acid ratios of fossil mollusks, compared to similar ratios in mollusks that also host dated corals. U-series analyses of corals that have experienced largely closed-system histories range from ~124 to ~118 ka, in good agreement with ages from MIS 5e reef terraces elsewhere in the world. There is no geomorphic, stratigraphic, or geochronology evidence for more than one high-sea stand during MIS 5e on the Pacific Coast of North America. However, in areas of low uplift rate, the outer parts of MIS 5e terraces apparently were re-occupied by the high-sea stand at ~100 ka (MIS 5c), evident from mixes of coral ages and mixes of molluscan faunas with differing thermal aspects. This sequence of events took place because glacial isostatic adjustment processes acting on North America resulted in regional high-sea stands at ~100 ka and ~80 ka that were higher than is the case in far-field regions, distant from large continental ice sheets. During MIS 5e time, sea surface temperatures (SST) off the Pacific Coast of North America were higher than is the case at present, evident from extralimital southern species of mollusks found in dated deposits. Apparently no wholesale shifts in faunal provinces took place, but in MIS 5e time, some species of bivalves and gastropods lived hundreds of kilometers north of their present northern limits, in good agreement with SST estimates derived from foraminiferal records and alkenone-based reconstructions in deep-sea cores. Because many areas of the Pacific Coast of North America have been active tectonically for much or all of the Quaternary, many earlier interglacial periods are recorded as uplifted, higher elevation terraces. In addition, from southern Oregon to northern Baja California, there are U-series-dated corals from marine terraces that formed ~80 ka, during MIS 5a. In contrast to MIS 5e, these terrace deposits host molluscan faunas that contain extralimital northern species, indicating cooler SST at the end of MIS 5. Here I present a standardized database of MIS 5e sea-level indicators along the Pacific Coast of North America and the corresponding dated samples. The database is available in Muhs (2021)  [https://doi.org/10.5281/zenodo.5557355].

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