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LIVE INTERACTIVE LEARNING @ YOUR DESKTOP

LIVE INTERACTIVE LEARNING @ YOUR DESKTOP. Relevance of Climate Change for the Arctic Marine Biological System Presented by: Dr. Rolf Gradinger. Thursday, December 3, 2009.

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LIVE INTERACTIVE LEARNING @ YOUR DESKTOP

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  1. LIVE INTERACTIVE LEARNING @ YOUR DESKTOP Relevance of Climate Change for the Arctic Marine Biological System Presented by: Dr. Rolf Gradinger Thursday, December 3, 2009

  2. Relevance of Climate Change for the Arctic Marine Biological SystemDr. Rolf GradingerSchool of Fisheries and Ocean SciencesUAF

  3. Introduction Data and pictures from Shelf Basin Interaction Studies 2002, 2004 NOAA Ocean Exploration 2005 Various Barrow fast ice trips Images by Raskoff, Bluhm, Hopcroft, Gradinger, Iken, Harper and www.

  4. Poll Question What do you consider the top arctic issue related to global warming? A) Loss of Polar Bear Habitat B) Loss of ice cover C) Influence on the arctic food web D) All of the above are equally important

  5. What do you consider the top arctic issue related to global warming? A) Loss of Polar Bear Habitat B) Loss of ice cover C) Influence on the arctic food web D) All of the above are equally important

  6. Personally, how well informed do you feel you are about the different consequences of global warming? [Place clip art on the continuum below] Very well informed Fairly well informed Not very well informed Not at all informed

  7. Arctic marine mammals: Ecological Applications 18, 2008

  8. Arctic Realms Sea ice Pelagic Benthic Nekton

  9. The microscopic life in sea ice Sea ice realm: Very little biological information Difficult to sample Corers, divers, surface melt ponds

  10. The microscopic life inside ice • For the Arctic: • Bacteria (Archaea, Proteobacteria etc. ?? species) • › 200 diatoms • › 200 flagellates • › 30 metazoans • Allochthonous fauna

  11. Sympagohydra tuuli

  12. Diving Under-ice fauna: at least 5 species http://www.youtube.com/watch?v=CriR2B_QbPc

  13. Arctic cod (Boreogadus saida): link to seals and birds

  14. Lets Pause for Two Questions from the Audience

  15. Life in the water column: the plankton

  16. The Pelagic fauna Historical Planktonic “bias” Calanus hyperboreus

  17. Diving, nets and ROV

  18. New records

  19. Benthos Imaging Tools … combined with Box corer, and other mud collecting tools

  20. Creepy crawlers • Diverse infauna • Abundant epifauna

  21. Lets Pause for Two Questions from the Audience

  22. The Arctic Seas: unique features

  23. Characteristics of the Arctic • 3 realms with >5000 invertebrate species • Tight coupling between ice/water/benthos • Huge gradients • Open system

  24. Coupling ice-water-benthos • Lifecycles/particle flux

  25. Coupling between realms - examples Ice algae Phyto- plankton Zoo- plankton Diving ducks Zoo- plankton Walrus Benthos Gray whale Bearded seal Demersal fish Coupling ice-water-benthos • Life cycles/ particle flux Phyto- plankton Ice algae Sea birds Pelagic fish Minke Bowhead Benthos

  26. Characteristics of the Arctic • 3 realms with >5000 invertebrate species • Tight coupling between ice/water/benthos • Huge gradients • Open system

  27. Hoizontal gradients http://www.whoi.edu/arcticedge/arctic_west02/update/020809_en3.html

  28. Characteristics of the Arctic • 3 realms with >5000 invertebrate species • Tight coupling between ice/water/benthos • Huge gradients • Open system • Bering Strait/Chukchi Shelf

  29. Bering Strait http://www.whoi.edu/arcticedge/arctic_west02/update/020809_en3.html

  30. Lets Pause for Two Questions from the Audience

  31. Implications of Arctic Change

  32. Arctic Change

  33. Loss of summer sea ice

  34. Future predictions: Precipitation, warming

  35. Lets Pause for Two Questions from the Audience

  36. Observed and suggested biological response to Arctic Change

  37. Arctic warming: Altered ice regime, increased freshwater run-off ?

  38. Light Ice Current/Late ice retreat Seeding by ice algae Water Algal bloom Zooplankton Pycnocline Sedimentation Sediment Future/Early ice retreat Mixing Pycnocline Benthos Bluhm and Gradinger 2008

  39. Changes in Antarctic food web Moline et al. 2004 (result from Antarctic LTER)

  40. Changes in Antarctic food web Low freshwater run off Strong freshwater run off Large algae Small algae Euphausiids Salps Usable by whales Not usable by whales Moline et al. 2004 (result from Antarctic LTER)

  41. RUSALCA 2004 Observed Biological Changes Increase in epifauna biomass (Norton Sound, Bering Sea) after Hamazaki et al. 2005 Northern range extensions in Chukchi Sea Sirenko et al. 2006

  42. Decrease in benthic infauna (Bering Sea) Grebmeier et al. 2006

  43. Poll Question What do you consider the top arctic issue related to global warming? A) Loss of Polar Bear Habitat B) Loss of ice cover C) Influence on the arctic food web D) All of the above are equally important

  44. Outlook • Change from benthic (e.g. walrus, grey whale) to pelagic ecosystem (e.g. ringed seals) • Loss of habitat (walrus, ringed seal, polar bear) • Species extinction • Change in food web structure – both quality and quantity

  45. Thank you to the sponsors of tonight's Web Seminar:

  46. http://learningcenter.nsta.org

  47. http://www.elluminate.com

  48. National Science Teachers Association Dr. Francis Q. Eberle, Executive Director Zipporah Miller, Associate Executive Director Conferences and Programs Al Byers, Assistant Executive Director e-Learning NSTA Web Seminars Paul Tingler, Director Jeff Layman, Technical Coordinator LIVE INTERACTIVE LEARNING @ YOUR DESKTOP

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