CONTRIBUTIONS OF TRACE METALS VIA ATMOSPHERIC DEPOSITION TO SANTA MONICA BAY AND THE SANTA MONICA BAY WATERSHED

2013 ◽  
Author(s):  
K. Schiff and K. Stolzenbach
Keyword(s):  
Trace Metals ◽  
Atmospheric Deposition ◽  
Santa Monica Bay ◽  
Santa Monica

scholarly journals Field Trial Comparing Two Materials for Marine Oil Sheen Sampling

2021 ◽  
Vol 107 (2) ◽  
pp. 71-76
Author(s):  
Bruce M. Joab ◽  
James McCall ◽  
Michael J. Anderson, ◽  
Michael Ammann
Keyword(s):  
Field Trial ◽  
The United States ◽  
Forensic Analysis ◽  
Coast Guard ◽  
California Department ◽  
Santa Monica Bay ◽  
Santa Monica ◽  
Natural Oil ◽  
Fluorocarbon Polymer ◽  
Fiberglass Material

The California Department of Fish and Wildlife (CDFW) uses fiberglass material for forensic analysis of oil sheens, while the United States Coast Guard (USCG) method uses a tetrafluoroetheylene-fluorocarbon (TFE-fluorocarbon) polymer net. We performed a field trial of these two materials by sampling natural oil seeps, two in Santa Monica Bay, and three sheen areas in the Santa Barbara Channel. Though the fiberglass material did collect less mass on some trials, the forensic chemistry results demonstrated that both materials were satisfactory for purposes of chemical forensic analysis as each pair of the sampling materials yielded results that were consistent with a common oil seep source.

Ecology and comparison of coastal and offshore bottlenose dolphins (Tursiops truncatus) in California

2009 ◽  
Vol 60 (6) ◽  
pp. 584 ◽  
Author(s):  
Maddalena Bearzi ◽  
Charles A. Saylan ◽  
Alice Hwang
Keyword(s):  
Tursiops Truncatus ◽  
Site Fidelity ◽  
Bottlenose Dolphins ◽  
Photo Identification ◽  
Santa Monica Bay ◽  
Santa Monica ◽  
Inshore Waters

Populations of coastal and offshore bottlenose dolphins (Tursiops truncatus) are considered to differ ecologically, with implications for their protection and management. We assessed occurrence, distribution and behaviour of coastal and offshore populations of dolphins during a photo-identification study in Santa Monica Bay and nearby areas (1997–2007). Bottlenose dolphins occurred year-round and were encountered on 44.2% of all surveys (n = 425). We photo-identified 647 individuals; of these, 375 (58.0%) were coastal (<1 km from shore), 241 (37.2%) offshore (1–65 km from shore) and 31 were both (4.8%). Dolphins mostly travel (69.0%) and travel-dive (61.5%), with offshore dolphins socialising more (22.6%) than coastal. There were low re-sighting rates for both coastal and offshore dolphins. Low re-sighting rates of coastal individuals provide little evidence of year-round site fidelity, suggesting their range is greater than the study area. Several individuals were re-sighted between and over 1-year periods, often foraging. This suggests that coastal dolphins: (1) are highly mobile within inshore waters, but spend time foraging in the study area, and (2) range >1 km from shore, contrary to what has been previously reported.

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