Estimate of Net Trophic Transfer Efficiency of PCBs to Lake Michigan Lake Trout from Their Prey

1998 ◽  
Vol 32 (7) ◽  
pp. 886-891 ◽  
Author(s):  
Charles P. Madenjian ◽  
Robert J. Hesselberg ◽  
Timothy J. DeSorcie ◽  
Larry J. Schmidt ◽  
Ralph M. Stedman ◽  
...  
Keyword(s):  
Lake Michigan ◽  
Lake Trout ◽  
Trophic Transfer ◽  
Transfer Efficiency ◽  
Trophic Transfer Efficiency

Field Estimate of Net Trophic Transfer Efficiency of PCBs to Lake Michigan Chinook Salmon from Their Prey

2002 ◽  
Vol 36 (23) ◽  
pp. 5029-5033 ◽  
Author(s):  
Charles P. Madenjian ◽  
Daniel V. O'Connor ◽  
Donald J. Stewart ◽  
Michael A. Miller ◽  
Robert G. Masnado
Keyword(s):  
Chinook Salmon ◽  
Lake Michigan ◽  
Trophic Transfer ◽  
Transfer Efficiency ◽  
Trophic Transfer Efficiency ◽  
Field Estimate

Net Trophic Transfer Efficiency of PCBs to Lake Michigan Coho Salmon from Their Prey

1998 ◽  
Vol 32 (20) ◽  
pp. 3063-3067 ◽  
Author(s):  
Charles P. Madenjian ◽  
Robert F. Elliott ◽  
Larry J. Schmidt ◽  
Timothy J. Desorcie ◽  
Robert J. Hesselberg ◽  
...  
Keyword(s):  
Lake Michigan ◽  
Coho Salmon ◽  
Trophic Transfer ◽  
Transfer Efficiency ◽  
Trophic Transfer Efficiency

scholarly journals Global ecosystem overfishing: Clear delineation within real limits to production

2019 ◽  
Vol 5 (6) ◽  
pp. eaav0474 ◽  
Author(s):  
Jason S. Link ◽  
Reg A. Watson
Keyword(s):  
Primary Production ◽  
Satellite Data ◽  
Strong Evidence ◽  
Trophic Transfer ◽  
Marine Ecosystems ◽  
Tropical Fish ◽  
Transfer Efficiency ◽  
Target Populations ◽  
Trophic Transfer Efficiency ◽  
Clear Delineation

The well-documented value of marine fisheries is threatened by overfishing. Management typically focuses on target populations but lacks effective tools to document or restrain overexploitation of marine ecosystems. Here, we present three indices and accompanying thresholds to detect and delineate ecosystem overfishing (EOF): the Fogarty, Friedland, and Ryther indices. These are based on widely available and readily interpreted catch and satellite data that link fisheries landings to primary production using known limits of trophic transfer efficiency. We propose theoretically and empirically based thresholds for each of those indices; with these criteria, several ecosystems are fished sustainably, but nearly 40 to 50% of tropical and temperate ecosystems exceed even extreme thresholds. Applying these criteria to global fisheries data results in strong evidence for two specific instances of EOF, increases in both pressure on tropical fish and a climate-mediated polar shift. Here, we show that these two patterns represent evidence for global EOF.

scholarly journals Micro-scale patchiness enhances trophic transfer efficiency and potential plankton biodiversity

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Anupam Priyadarshi ◽  
S. Lan Smith ◽  
Sandip Mandal ◽  
Mamoru Tanaka ◽  
Hidekatsu Yamazaki
Keyword(s):  
Food Chain ◽  
Trophic Transfer ◽  
Stability Domain ◽  
Transfer Efficiency ◽  
Ecosystem Models ◽  
Model Stability ◽  
Micro Scale ◽  
Trophic Transfer Efficiency ◽  
Generalized Framework ◽  
Aquatic Predators

AbstractRather than spatial means of biomass, observed overlap in the intermittent spatial distributions of aquatic predators and prey is known to be more important for determining the flow of nutrients and energy up the food chain. A few previous studies have separately suggested that such intermittency enhances phytoplankton growth and trophic transfer to sustain zooplankton and ultimately fisheries. Recent observations have revealed that phytoplankton distributions display consistently high degrees of mm scale patchiness, increasing along a gradient from estuarine to open ocean waters. Using a generalized framework of plankton ecosystem models with different trophic configurations, each accounting for this intermittency, we show that it consistently enhances trophic transfer efficiency (TE), i.e. the transfer of energy up the food chain, and expands the model stability domain. Our results provide a new explanation for observation-based estimates of unexpectedly high TE in the vast oligotrophic ocean and suggest that by enhancing the viable trait space, micro-scale variability may potentially sustain plankton biodiversity.

scholarly journals Future Climate Scenarios for a Coastal Productive Planktonic Food Web Resulting in Microplankton Phenology Changes and Decreased Trophic Transfer Efficiency

PLoS ONE ◽  
2014 ◽  
Vol 9 (4) ◽  
pp. e94388 ◽  
Author(s):  
Albert Calbet ◽  
Andrey F. Sazhin ◽  
Jens C. Nejstgaard ◽  
Stella A. Berger ◽  
Zachary S. Tait ◽  
...  
Keyword(s):  
Food Web ◽  
Trophic Transfer ◽  
Future Climate ◽  
Transfer Efficiency ◽  
Climate Scenarios ◽  
Planktonic Food ◽  
Trophic Transfer Efficiency

scholarly journals Coaggregation in a microbial predator–prey system affects competition and trophic transfer efficiency

Ecology ◽  
2013 ◽  
Vol 94 (4) ◽  
pp. 870-881 ◽  
Author(s):  
Gianluca Corno ◽  
Jörg Villiger ◽  
Jakob Pernthaler
Keyword(s):  
Trophic Transfer ◽  
Transfer Efficiency ◽  
Predator Prey ◽  
Prey System ◽  
Trophic Transfer Efficiency

scholarly journals Ocean Acidification Affects the Phyto-Zoo Plankton Trophic Transfer Efficiency

PLoS ONE ◽  
2016 ◽  
Vol 11 (4) ◽  
pp. e0151739 ◽  
Author(s):  
Gemma Cripps ◽  
Kevin J. Flynn ◽  
Penelope K. Lindeque
Keyword(s):  
Ocean Acidification ◽  
Trophic Transfer ◽  
Transfer Efficiency ◽  
Trophic Transfer Efficiency
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