Bioenergetics-Based Modeling of Individual PCB Congeners in Nestling Tree Swallows from Two Contaminated Sites on the Upper Hudson River, New York

2004 ◽  
Vol 38 (23) ◽  
pp. 6234-6239 ◽  
Author(s):  
John W. Nichols ◽  
Kathy R. Echols ◽  
Donald E. Tillitt ◽  
Anne L. Secord ◽  
John P. McCarty
Keyword(s):  
New York ◽  
Hudson River ◽  
Contaminated Sites ◽  
Tree Swallows ◽  
Pcb Congeners

Accumulation of PCB Congeners in Nestling Tree Swallows (Tachycineta bicolor) on the Hudson River, New York

2004 ◽  
Vol 38 (23) ◽  
pp. 6240-6246 ◽  
Author(s):  
Kathy R. Echols ◽  
Donald E. Tillitt ◽  
John W. Nichols ◽  
Anne L. Secord ◽  
John P. McCarty
Keyword(s):  
New York ◽  
Hudson River ◽  
Tachycineta Bicolor ◽  
Tree Swallows ◽  
Pcb Congeners

scholarly journals Contaminant bioaccumulation dynamics in young-of-the-year bluefish subpopulations in New York Bight with a special reference to the condition and nursery area fidelity subsequent to recruitment

2016 ◽  
Vol 73 (1) ◽  
pp. 35-52 ◽  
Author(s):  
Ashok D. Deshpande ◽  
Bruce W. Dockum ◽  
Andrew F.J. Draxler
Keyword(s):  
New York ◽  
Growth Characteristic ◽  
Hudson River ◽  
Fish Length ◽  
New York Bight ◽  
Pcb Congeners ◽  
York Bight ◽  
Young Of The Year ◽  
Contamination Levels ◽  
Newark Bay

Contaminant bioaccumulation dynamics was examined in young-of-the-year (YOY) bluefish subpopulations (Pomatomus saltatrix) in the New York Bight ecosystem, and the results were used to assess (i) effects of habitat quality in terms of levels of PCBs and pesticides on bluefish condition and (ii) fidelity of YOY bluefish to different subestuaries that served as the nurseries subsequent to recruitment during their first summer. Total PCBs and p,p′-DDE body burdens increased with fish length, but concentrations generally increased only poorly to moderately, which suggested steady-state contaminant uptake commensurate with aggressive feeding and dilution related to rapid growth characteristic of YOY bluefish within a subestuary. High condition factors paired with elevated contamination levels in bluefish from the Lower Hudson River, as compared with bluefish from Newark Bay with poor condition factors paired with elevated contamination levels, suggested that PCBs and pesticides alone may not determine condition in these fish. We found dissimilar patterns of prominent PCB congeners in bluefish from adjacent subestuaries (e.g., Newark Bay and Lower Hudson River) suggesting separate contaminant sources. Total PCB normalized fingerprints of PCB congeners permitted statistical discrimination among YOY bluefish specimens from various estuaries with a potential to differentiate subpopulations on scales to less than 20 km. This unexpected fidelity to nursery estuaries may have implications for the management strategies.

Polychlorinated biphenyls and 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents in tree swallows from the upper Hudson River, New York State, USA

1999 ◽  
Vol 18 (11) ◽  
pp. 2519-2525 ◽  
Author(s):  
Anne L. Secord ◽  
John P. McCarty ◽  
Kathy R. Echols ◽  
John C. Meadows ◽  
Robert W. Gale ◽  
...  
Keyword(s):  
New York ◽  
Polychlorinated Biphenyls ◽  
New York State ◽  
Hudson River ◽  
Tree Swallows ◽  
York State ◽  
Tetrachlorodibenzo P Dioxin

scholarly journals “Dehalococcoides” sp. Strain CBDB1 Extensively Dechlorinates the Commercial Polychlorinated Biphenyl Mixture Aroclor 1260

2009 ◽  
Vol 75 (13) ◽  
pp. 4516-4524 ◽  
Author(s):  
Lorenz Adrian ◽  
Vlasta Dudková ◽  
Katařina Demnerová ◽  
Donna L. Bedard
Keyword(s):  
New York ◽  
Polychlorinated Biphenyl ◽  
Hudson River ◽  
Pcb Congeners ◽  
Aroclor 1248 ◽  
Wide Range ◽  
High Resolution Gas Chromatography ◽  
Pcb Dechlorination ◽  
First Time

ABSTRACT “Dehalococcoides” sp. strain CBDB1 in pure culture dechlorinates a wide range of PCB congeners with three to eight chlorine substituents. Congener-specific high-resolution gas chromatography revealed that CBDB1 extensively dechlorinated both Aroclor 1248 and Aroclor 1260 after four months of incubation. For example, 16 congeners comprising 67.3% of the total PCBs in Aroclor 1260 were decreased by 64%. We confirmed the dechlorination of 43 different PCB congeners. The most prominent dechlorination products were 2,3′,5-chlorinated biphenyl (25-3-CB) and 24-3-CB from Aroclor 1248 and 235-25-CB, 25-25-CB, 24-25-CB, and 235-236-CB from Aroclor 1260. Strain CBDB1 removed flanked para chlorines from 3,4-, 2,4,5-, and 3,4,5-chlorophenyl rings, primarily para chlorines from 2,3,4,5-chlorophenyl rings, primarily meta chlorines from 2,3,4- and 2,3,4,6-chlorophenyl rings, and either meta or para chlorines from 2,3,4,5,6-chlorophenyl rings. The site of attack on the 2,3,4-chorophenyl ring was heavily influenced by the chlorine configuration on the opposite ring. This dechlorination pattern matches PCB Process H dechlorination, which was previously observed in situ both in the Acushnet Estuary (New Bedford, MA) and in parts of the Hudson River (New York). Accordingly, we propose that Dehalococcoides bacteria similar to CBDB1 are potential agents of Process H PCB dechlorination in the environment. This is the first time that a complex naturally occurring PCB dechlorination pattern has been reproduced in the laboratory using a single bacterial strain.

Die Konstruktion von Natur – Central Park neu besichtigt | The Construction of Nature – Central Park Revisited

2005 ◽  
Vol 156 (8) ◽  
pp. 288-296
Author(s):  
Vittorio Magnago Lampugnani
Keyword(s):  
New York ◽  
Hudson River ◽  
The United States ◽  
Central Park ◽  
Housing Developments ◽  
Hudson River School ◽  
The North ◽  
Man And Nature ◽  
The 19Th Century ◽  
The Relationship

In the first half of the 19th century scientific philosophers in the United States, such as Emerson and Thoreau, began to pursue the relationship between man and nature. Painters from the Hudson River School discovered the rural spaces to the north of New York and began to celebrate the American landscape in their paintings. In many places at this time garden societies were founded, which generated widespread support for the creation of park enclosures While the first such were cemeteries with the character of parks, housing developments on the peripheries of towns were later set in generous park landscapes. However, the centres of the growing American cities also need green spaces and the so-called «park movement»reached a first high point with New York's Central Park. It was not only an experimental field for modern urban elements, but even today is a force of social cohesion.

Sign in / Sign up

Export Citation Format

Share Document