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Predator-induced Trophic Cascades and Spillover Effects in Ecological Marine Sinks

Explore trophic interactions from the Gulf of Riga in the 1970s-1980s, focusing on cod, herring, zooplankton, and phytoplankton dynamics, and the impacts of predator transitory spillover. Witness the collapse and recovery of the cod population due to various ecological factors.

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Predator-induced Trophic Cascades and Spillover Effects in Ecological Marine Sinks

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  1. Group 19Module 2 Ethan Kaufman, YemiOlubowale, AbhinavUppal, Divya Vedula

  2. Article:Predator Transitory Spillover Induces Trophic Cascades in Ecological SinksBy Casini et al. The scope of the presentation focuses on events from 1977-1988

  3. Gulf of Riga (Figure From: www.Ikzm-d .de)

  4. Outline

  5. Trophic Levels (GoR) Cod Herring Zooplankton Phytoplankton (Adapted From Casini et al.)

  6. SUNLIGHT T R O P H I C C A S C A D E S (Figure From: www.lmvp.org)

  7. The Idea Spillover Source Sink Savingwater Wasted

  8. Overfishing, adverse conditions • Collapse in Baltic • Disappear from GoR Cod Distribution Early 80s mid 80s -- Mid 1970s Contraction High salinity, O2 MB = Main Basin GoR = Gulf of Riga cod biomass (Figure adapted from Cassini et al.)

  9. Data from a fishery (GoR) (Figure from Cassini et al.)

  10. Density Dependent Population Schematic Birth Immigration Death Emigration Population

  11. Birth Immigration Death Emigration Population

  12. Birth Immigration Death Emigration Population

  13. Birth Immigration Death Emigration Population

  14. Cod Herring Body Size Increases (early 1980s) Zooplankton Phytoplankton (Adapted From Cassini et al.)

  15. Everything follows the leading horse www.petwildanimalswallpapers.blogspot.com

  16. Works Cited • Abesamis RA, Russ GR (2005) Density-dependent spillover from marine reserves: Longterm evidence. Ecol Appl 15:1798–1812. • Casini, Michele, Thorsten Blenckner, Christian Mollmann, Anna Gardmark, Martin Lindegren, Marcos Llope, GeorgsKornilovs, Maris Plikshs, and Nils Christian Stenseth. "Predator Transitory Spillover Induces Trophic Cascades in Ecological Sinks. " Http://www.pnas.org/content/109/21/8185.full.pdf+html. Swedish University of Agricultural Sciences, Department of Aquatic Resources, Institute of Marine Research, 13 Apr. 2012. Web. 03 Oct. 2012. • Freeman, Scott. Biological Science. 4th ed. San Fransicso, CA: Benjamin Cummings, 2011. Print.

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