Diagenetic fate of organic contaminants on the Palos Verdes Shelf, California

Eganhouse, Robert P.; Pontolillo, James; Leiker, Thomas J.

doi:10.1016/s0304-4203(00)00034-7

Cited by 83 publications

(64 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…5 shows the vertical profiles of DDTs in the three sedimentary cores from the Nanpaiwu River and Bohai Bay. The total DDT concentrations are much lower than the levels detected in the San Francisco Bay (Venkatesan et al, 1999) and the Palos Verdes Shelf, CA (Eganhouse et al, 2000). For C-1, DDTs were only detected in depths from 50 to 95 cm (maximum concentration: 46.2 ng/g) suggesting that no DDTs had recently been discharged into the Nanpaiwu River above C-1.…”

Section: Ddtsmentioning

confidence: 73%

Occurrence of trace organic contaminants in Bohai Bay and its adjacent Nanpaiwu River, North China

Hu¹,

Wan²,

Shao

et al. 2005

Marine Chemistry

View full text Add to dashboard Cite

Concentrations of hexachlorocyclohexanes (HCHs), hexachlorobenzene (HCB), pentachlorobenzene (penta-CB), polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs), coplanar polychlorinated biphenyls (coPCBs), 1,1,1-trichloro-2,2-bis( p-chlorophenyl)ethane (DDTs, including p,pV -DDT; o,pV -DDT; p,pV -DDD; o,pV -DDD; p,pV -DDE; o,pV -DDE; p,pV -DDMU), nonylphenol (NP), and nonylphenol polyethoxylates (NPEOs) were measured in sedimentary cores from Bohai Bay (one core) and its adjacent river, the Nanpaiwu River (two cores), North China. While a-, h-, and g-HCHs were detected in similar abundance in the two cores from the Nanpaiwu River, only a-HCH was detected in the Bohai Bay core, suggesting that a-HCH might be more resistant to degradation than h-or g-HCHs. The concentrations of HCHs and HCB in the core from Bohai Bay were in the range of 0.8-140 and 9.1-1300 ng/g dry wt, respectively, whereas in the cores from the Nanpaiwu River, the maximum concentrations of HCHs and HCB reached 84,200 and 141,400 ng/g dry wt, respectively. There was a similarity of sedimentary profiles between HCHs and HCB in the three cores. The concentration of PCDDs/DFs in Bohai Bay was 0.5-3.5 ng/g dry wt [1.6-6.4 toxic equivalents (TEQ) world health organization (WHO) pg/g], far lower than the concentrations in the core samples taken from the Nanpaiwu River (the maximum concentration: 9200 ng/g dry wt; 22,000 TEQ WHO pg/g). The congener profiles of PCDD/DFs and co-PCB in the cores were similar to those in PCP, and the concentration of co-PCBs was related to that of PCDDs/DFs. In addition, the concentrations of HCH, HCB, PCDD/Fs, and co-PCB all decreased linearly relative to total organic carbon content (TOC) in surface sediment from the river to Bohai Bay. The concentration of DDTs ranged from 1.6 to 12.3 ng/g dry wt in Bohai Bay, significantly different from the profiles from the Napaiwu River (29.3 ng/g dry wt). An abundance of the compounds o,pV -DDE and o,pV -DDD were detected in the cores. The sedimentary profiles of NP and NPEOs were similar, and two peak concentrations of NP/NPEOs were found at the subsurface and subbottom in the core from Bohai Bay, respectively. The concentration of NP and NPEOs in the cores from the Nanpaiwu

show abstract

Section: Ddtsmentioning

confidence: 73%

Occurrence of trace organic contaminants in Bohai Bay and its adjacent Nanpaiwu River, North China

Hu¹,

Wan²,

Shao

et al. 2005

Marine Chemistry

View full text Add to dashboard Cite

show abstract

“…The benthic brittle star Amphiura archystata had higher body burdens than any of the fish species (3,340 ug/kg lipid). Eganhouse et al (2000), and Zeng & Tran (2002) …”

Section: Discussionmentioning

confidence: 99%

Distribution of DDT and other persistent organic contaminants in Canyons and on the continental shelf off the central California coast

Hartwell

2008

Marine Environmental Research

View full text Add to dashboard Cite

“…An additional approach-POP ratios-can be used to assess regional sources of POPs transferred to predators from their prey (Calambokidis and Barlow, 1991;Krahn et al, 1999;Muir et al, 1990). For example, DDTs were used heavily in California before their ban in the 1970s and California marine waters also received long-term, significant discharges of DDTs from a manufacturing plant (Eganhouse et al, 2000). As a result, concentrations of P DDTs relative to P PCBs (i.e., P DDTs/ P PCBs ratio) are typically higher in California marine species than in comparable species from other eastern North Pacific locations-providing a ''California signature'' (Brown et al, 1998;Calambokidis and Barlow, 1991;Jarman et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Use of chemical tracers in assessing the diet and foraging regions of eastern North Pacific killer whales

Krahn

Herman

Matkin³

et al. 2007

Marine Environmental Research

118

View full text Add to dashboard Cite

Top predators in the marine environment integrate chemical signals acquired from their prey that reflect both the species consumed and the regions from which the prey were taken. These chemical tracers-stable isotope ratios of carbon and nitrogen; persistent organic pollutant (POP) concentrations, patterns and ratios; and fatty acid profiles-were measured in blubber biopsy samples from North Pacific killer whales (Orcinus orca) (n = 84) and were used to provide further insight into their diet, particularly for the offshore group, about which little dietary information is available. The offshore killer whales were shown to consume prey species that were distinctly different from those of sympatric resident and transient killer whales. In addition, it was confirmed that the offshores forage as far south as California. Thus, these results provide evidence that the offshores belong to a third killer whale ecotype. Resident killer whale populations showed a gradient in stable isotope profiles from west (central Aleutians) to east (Gulf of Alaska) that, in part, can be attributed to a shift from off-shelf to continental shelf-based prey. Finally, stable isotope ratio results, supported by field

show abstract

Diagenetic fate of organic contaminants on the Palos Verdes Shelf, California

Cited by 83 publications

References 47 publications

Occurrence of trace organic contaminants in Bohai Bay and its adjacent Nanpaiwu River, North China

Occurrence of trace organic contaminants in Bohai Bay and its adjacent Nanpaiwu River, North China

Distribution of DDT and other persistent organic contaminants in Canyons and on the continental shelf off the central California coast

Use of chemical tracers in assessing the diet and foraging regions of eastern North Pacific killer whales

Contact Info

Product

Resources

About