Dinoflagellate cyst accumulation rates of ODP Hole 146-893A from Santa Barbara Basin

The dinoflagellate cyst record from Ocean Drilling Program Hole 893A, Santa Barbara Basin, southern California, is examined at millennial-scale resolution for the past 40 kyr. Changes in cyst abundance, composition of cyst assemblages, and their diversity reflect major shifts in climate and ocean circulation in the region over this time interval. Throughout the sequence, dinoflagellate cyst assemblages are dominated by heterotrophic dinoflagellates. Brigantedinium spp. and other upwelling-related taxa such as Echinidinium and Protoperidinium americanum are abundant, indicating the continued influence of coastal upwelling on the basin during the late Quaternary. A significant increase in cyst accumulation rates is seen during the Holocene and, to a lesser extent, during shorter warming events such as Bolling/Allerod and Dansgaard-Oeschger interstadials, implying enhanced marine productivity during these periods. Cyst diversity is high during the Holocene. An increase in abundance of cysts produced by autotrophic dinoflagellates in the late Holocene suggests enhanced input of warm, nutrient-rich waters. In contrast, cyst assemblages from the Last Glacial Maximum exhibit a relatively low diversity and an increase in the cysts of heterotrophic dinoflagellates, in particular Selenopemphix nephroides. The presence of this taxon in association with Brigantedinium spp. implies substantial cooling of surface waters in the Santa Barbara Basin at that time.

School desegregation in Santa Barbara, California : a staff report of the U.S. Commission on Civil Rights.

Includes bibliographical references.

An analysis of some traffic problems on the campus of the University of California, Santa Barbara.

Mode of access: Internet.

Mines and mineral resources of the counties of Monterey, San Benito, San Luis Obispo, Santa Barbara, Ventura, by Walter W. Bradley [and others]

Mode of access: Internet.

Geology of a part of the Santa Ynez River District, Santa Barbara County, California /

Cover title.

Real Provisión de su Magestad , y señores de su Consejo, declarando varias dudas propuestas por la Universidad de Salamanca sobre los exercicios que han de preceder para recibir los grados de licenciamiento en la capilla de Santa Barbara, con lo demás que contiene.

Mode of access: Internet.

Santa Barbara's Royal Rancho : the fabulous history of Los Dos Pueblos /

Includes bibliographical references and index.

Guide to the Santa Barbara Botanic Garden, Santa Barbara, California.

Includes index.

The Family as supportive personnel in speech and hearing remediation; proceedings of the post-graduate short course at the University of California, Santa Barbara, March 31, April 1 and 2, 1970.

"SRS-RSA-202-1971."

Santa Barbara county units of study for teachers in elementary schools ...

v. 5. Santa Barbara county guide for teachers of children of differnt cultures.

Taxonomic atlas of the benthic fauna of the Santa Maria Basin and western Santa Barbara Channel : final report /

"October 1993."

Sierra Blanca limestone in Santa Barbara County, California.

Mode of access: Internet.

Soil survey of the Santa Barbara area, California /

United States Department of Agriculture in cooperation with the University of California Agricultural Experiment Station.

Benthic foraminiferal record from Santa Barbara basin

The oxygen minimum zone (OMZ) of the late Quaternary California margin experienced abrupt and dramatic changes in strength and depth in response to changes in intermediate water ventilation, ocean productivity, and climate at orbital through millennial time scales. Expansion and contraction of the OMZ is exhibited at high temporal resolution (107-126 year) by quantitative benthic foraminiferal assemblage changes in two piston cores forming a vertical profile in Santa Barbara Basin (569 m, basin floor; 481 m, near sill depth) to 34 and 24 ka, respectively. Variation in the OMZ is quantified by new benthic foraminiferal groupings and new dissolved oxygen index based on documented relations between species and water-mass oxygen concentrations. Foraminiferal-based paleoenvironmental assessments are integrated with principal component analysis, bioturbation, grain size, CaCO3, total organic carbon, and d13C to reconstruct basin oxygenation history. Fauna responded similarly between the two sites, although with somewhat different magnitude and taxonomic expression. During cool episodes (Younger Dryas and stadials), the water column was well oxygenated, most strongly near the end of the glacial episode (17-16 ka; Heinrich 1). In contrast, the OMZ was strong during warm episodes (Bølling/Allerød, interstadials, and Pre-Boreal). During the Bølling/Allerød, the OMZ shoaled to <360 m of contemporaneous sea level, its greatest vertical expansion of the last glacial cycle. Assemblages were then dominated by Bolivina tumida, reflecting high concentrations of dissolved methane in bottom waters. Short decadal intervals were so severely oxygen-depleted that no benthic foraminifera were present. The middle to late Holocene (6-0 ka) was less dysoxic than the early Holocene.