Polychlorinated Biphenyl Bioaccumulation Patterns Among Lake Erie Lower Trophic Level Consumers Reflect Species Ecologies

Models for predicting potential fish yield from indices of productivity or standing crop at a lower trophic level have proved most reliable when applied to a specific fish association. Using chlorophyll concentration as the independent variable, we demonstrated that Stizostedion yield was defined by a dome-shaped curve with maximum catch of about 10 kg∙ha−1∙yr−1 occurring between 7.5 and 12.5 mg chlorophyll a∙m−3. We postulate that the ascending and descending portions of the curve represent trophic regions where walleye production is replaced, respectively, by that of salmonid/coregonid- and centrarchid/cyprinid-dominated communities.

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Responses of lower trophic-level organisms to typhoon passage on the outer shelf of the East China Sea: an incubation experiment

Biogeosciences Discussions ◽

10.5194/bgd-10-6605-2013 ◽

2013 ◽

Vol 10 (4) ◽

pp. 6605-6635 ◽

Cited By ~ 1

Author(s):

N. Yasuki ◽

K. Suzuki ◽

A. Tsuda

Keyword(s):

Water Column ◽

East China Sea ◽

Trophic Level ◽

Outer Shelf ◽

East China ◽

Strong Wind ◽

The East China Sea ◽

Phytoplankton Productivity ◽

China Sea ◽

Lower Trophic Level

Abstract. Typhoons can induce vertical mixing, upwelling, or both in the water column due to strong wind stress. These events can induce phytoplankton blooms in the oligotrophic ocean after typhoon passage. However, little is known about the responses of lower trophic-level organisms or changes in the community structure following the passage of typhoons, particularly in offshore regions. Therefore, we evaluated community succession on the outer shelf of the East China Sea through on-deck bottle incubation experiments simulating hydrographic conditions after the passage of a typhoon. Under all of the experimental conditions we tested, chlorophyll a concentrations increased more than 9-fold within 6 days, and these algal cells were mainly composed of large diatoms (>10 μm). Ciliates also increased along with the diatom bloom. These results suggest that increases in diatom and ciliate populations may enhance biogenic carbon export in the water column. Typhoons can affect not only phytoplankton productivity, but also the composition of lower trophic-level organisms and biogeochemical processes in oligotrophic offshore regions.

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Bioaccumulation of PCDD/Fs and Co-PCBs in Lower-Trophic-Level Organisms in Sendai Bay, Japan

Water Air & Soil Pollution ◽

10.1023/b:wate.0000049184.53688.fb ◽

2004 ◽

Vol 159 (1) ◽

pp. 291-312 ◽

Cited By ~ 8

Author(s):

Yutaka Okumura ◽

Yoh Yamashita ◽

Youichi Kohno

Keyword(s):

Trophic Level ◽

Lower Trophic Level ◽

Sendai Bay

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Comparison of polycyclic aromatic hydrocarbon and polychlorinated biphenyl dynamics in benthic invertebrates of Lake Erie, USA

Environmental Toxicology and Chemistry ◽

10.1002/etc.5620191215 ◽

2000 ◽

Vol 19 (12) ◽

pp. 2943-2950 ◽

Cited By ~ 54

Author(s):

Sarah B. Gewurtz ◽

Rodica Lazar ◽

G. Douglas Haffner

Keyword(s):

Polycyclic Aromatic Hydrocarbon ◽

Aromatic Hydrocarbon ◽

Benthic Invertebrates ◽

Lake Erie ◽

Polychlorinated Biphenyl ◽

Polycyclic Aromatic

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Modeling the effect of ENSO on the lower trophic level ecosystem of the Cold Tongue and the Warm Pool regions in the equatorial Pacific

Journal of Marine Systems ◽

10.1016/j.jmarsys.2008.12.004 ◽

2009 ◽

Vol 77 (1-2) ◽

pp. 160-181 ◽

Cited By ~ 2

Author(s):

B. Salihoglu

Keyword(s):

Trophic Level ◽

Warm Pool ◽

Equatorial Pacific ◽

Cold Tongue ◽

Lower Trophic Level

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Coupling of an individual-based model of anchovy with lower trophic level and hydrodynamic models

Journal of Ocean University of China ◽

10.1007/s11802-013-1901-x ◽

2013 ◽

Vol 12 (1) ◽

pp. 45-52 ◽

Cited By ~ 5

Author(s):

Yuheng Wang ◽

Hao Wei ◽

Michio J. Kishi

Keyword(s):

Trophic Level ◽

Hydrodynamic Models ◽

Individual Based Model ◽

Lower Trophic Level

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Fireproof killer whales (Orcinus orca): flame-retardant chemicals and the conservation imperative in the charismatic icon of British Columbia, Canada

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f05-244 ◽

2006 ◽

Vol 63 (1) ◽

pp. 224-234 ◽

Cited By ~ 41

Author(s):

Peter S Ross

Keyword(s):

British Columbia ◽

Trophic Level ◽

Polybrominated Diphenyl Ethers ◽

Marine Mammals ◽

Polychlorinated Biphenyl ◽

High Trophic Level ◽

Orcinus Orca ◽

Weight Of Evidence ◽

Older Individuals ◽

Killer Whales

Long-lived and high trophic level marine mammals are vulnerable to accumulating often very high concentrations of persistent chemicals, including pesticides, industrial by-products, and flame retardants. In the case of killer whales (Orcinus orca), some of the older individuals currently frequenting the coastal waters of British Columbia (BC) were born during the First World War, well before the advent of widespread chemical manufacture and use. BC's killer whales are now among the most polychlorinated biphenyl (PCB) contaminated marine mammals in the world. While the "legacy" PCBs have largely been banned, polybrominated diphenyl ethers (PBDEs) have recently emerged as a major concern. The endocrine-disrupting nature of these two persistent fire retardants in biota spells trouble at the top of the food chain, with increasing evidence of effects on reproductive health, the immune system, and development in exposed mammals. The heavy contamination of BC's killer whales, coupled with their long life span and high trophic level, highlights the need for a "weight of evidence" approach in research, conservation planning, and regulatory decisions. Given the global nature of contaminant dispersion, such approaches can only be effective when carried out on both national and international scales.

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