Multicriteria Bayesian Analysis of Lower Trophic Level Uncertainties and Value of Research in Lake Erie

2003 ◽  
Vol 9 (4) ◽  
pp. 1023-1057 ◽  
Author(s):  
Jong Bum Kim ◽  
Benjamin F. Hobbs ◽  
Joseph F. Koonce
Keyword(s):  
Bayesian Analysis ◽  
Trophic Level ◽  
Lake Erie ◽  
Lower Trophic Level

Potential Stizostedion Yield as a Function of Chlorophyll Concentration with Special Reference to Lake Erie

1987 ◽  
Vol 44 (S2) ◽  
pp. s166-s170 ◽  
Author(s):  
Ray T. Oglesby ◽  
Joe H. Leach ◽  
John Forney
Keyword(s):  
Special Reference ◽  
Chlorophyll A ◽  
Trophic Level ◽  
Standing Crop ◽  
Lake Erie ◽  
Chlorophyll Concentration ◽  
Fish Yield ◽  
Lower Trophic Level ◽  
Independent Variable

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.

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

2013 ◽  
Vol 10 (4) ◽  
pp. 6605-6635 ◽  
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.

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

2004 ◽  
Vol 159 (1) ◽  
pp. 291-312 ◽  
Author(s):  
Yutaka Okumura ◽  
Yoh Yamashita ◽  
Youichi Kohno
Keyword(s):  
Trophic Level ◽  
Lower Trophic Level ◽  
Sendai Bay

Using lower trophic level factors to predict outcomes in classical biological control of insect pests

2005 ◽  
Vol 6 (6) ◽  
pp. 571-584 ◽  
Author(s):  
Paul Gross ◽  
Bradford A. Hawkins ◽  
Howard V. Cornell ◽  
Balakrishna Hosmane
Keyword(s):  
Biological Control ◽  
Trophic Level ◽  
Insect Pests ◽  
Classical Biological Control ◽  
Lower Trophic Level

Effects of lower trophic level biomass and water temperature on fish communities: A modelling study

2016 ◽  
Vol 146 ◽  
pp. 22-37 ◽  
Author(s):  
Jérôme Guiet ◽  
Olivier Aumont ◽  
Jean-Christophe Poggiale ◽  
Olivier Maury
Keyword(s):  
Water Temperature ◽  
Trophic Level ◽  
Fish Communities ◽  
Lower Trophic Level ◽  
Modelling Study

Parameter sensitivity study of the NEMURO lower trophic level marine ecosystem model

2007 ◽  
Vol 202 (1-2) ◽  
pp. 26-37 ◽  
Author(s):  
Naoki Yoshie ◽  
Yasuhiro Yamanaka ◽  
Kenneth A. Rose ◽  
David L. Eslinger ◽  
Daniel M. Ware ◽  
...  
Keyword(s):  
Trophic Level ◽  
Marine Ecosystem ◽  
Ecosystem Model ◽  
Sensitivity Study ◽  
Parameter Sensitivity ◽  
Lower Trophic Level ◽  
Marine Ecosystem Model
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