Threats to Aquatic Ecosystems For Wed 04 March 2009
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1 Posted for Wed 04 Mar st class meeting THREATS (con t) to Aquatic Ecosystems Please read: Fri: Mon: Environmental Biology (ECOL 206) University of Arizona, spring 2009 Kevin Bonine, Ph.D. Tuan Cao, Graduate TA Mary Jane Epps, Graduate TA EPA website links EPA Aquatic Threats Links Second Midterm Exam (material since 1 st exam) LAB reading to do BEFORE lab! Current Events Assignment Due 9am each Friday -See Syllabus for Details -See Rubric on Course Website Evolution & Ecology Evidence Energy Ethics & Equality Economics 1 Threats to Aquatic Ecosystems For Wed 04 March 2009 Schedule: Mon: Second Midterm Exam (material since 1 st exam) Wed 04 Mar: EPA Aquatic Threats Links Creativity Project Title & Description due Friday 06 Mar Fri 06 Mar: Postel 2001, water Mon 09 Mar: Levidow 1999; GM Foods Debate (Wed lab) Wed 11 Mar: See reading links on website about food Fri 13 Mar: Disease Transmission & Evolution (Worobey) No lecture LAB reading meeting on Monday to do BEFORE lab! 23 March Bring Laptop This Week Van next week Evolution & Ecology Evidence Energy Ethics & Equality Economics 2 EXTRA CREDIT SLOTS (through spring break) Sarah H. (Beach Boys Don t Go Near the Water) Alexander J. (Deadlock s Seal Slayer) George H. (Kansas Death of Mother Nature Suite) Brianna D. (Jef Poskanzer The Conservation Song) Rod B. (Michael Jackson Earth Song) Chris P. (Eddie Vedder Society) Avy L. (Roy Zimmerman Creation Science 101) Stasha M. (Randy Newman Burn On) Kyle D. (Nektar Recycle) Brett C. (Jethro Tull Wond ring again) Jackie B. Emily W. Whitney C. 3 4 Estuaries Threats to Estuaries 5 Marinas Shrimp Farming Coastal Development Changes in Sea Level 6 1
2
3 Mangroves Threats to Mangroves Marinas Shrimp Farming Coastal Development Food and Wood harvesting Changes in Sea Level
4 Threats to Whales and other Marine Life Overfishing Sonar Vaquita world s smallest cetacean
5
6 Ocean About 90% of the ocean biomass is microbial Threats to Oceans Overfishing Plastics Acidification Warming Rising? /watch?v=qjvifvrgi8o (9 minutes)
7 Water Dead Zones Trawling Trawling for seafood is like cutting down the forest to catch a deer
8 Lake Bycatch Threats to Lakes Development Invasive Species Recreation
9 49 50 Wetland Threats to Wetlands Development Invasive Species Channelization Chytrid Fungus
10 River Threats to Rivers 55 Development Invasive Species Channelization DAMS 56 Subsidence
11 Threats to Caves etc. Water Harvesting Invasive Species Example: Quitobaquito Pupfish Cyprinodon macularius Desert Pupfish Bromeliad? Desert pupfish declined due to the introduction and spread of exotic predatory and competitive fishes, water impoundment and diversion, water pollution, groundwater pumping, stream channelization, and habitat modification. Photograph Courtesy of John Rinne Healthy population of almost 10,000 fish inhabits this oasis. This last refuge of a unique fish is being actively managed Threats to Tropical Forests Deforestation Global Climate Change Invasive Species Overharvesting Trade in Flora & Fauna
12 Glacier Threats to Glaciers Global Climate Change Albedo Feed-forward Runaway Greenhouse Changes in Sea Level
13 25 Feb Global Climate Change Predicted change by A U.S. Geological Survey report released in November 2006 indicated that the Beaufort Sea polar bear population has experienced a significant drop in cub survival. The study also determined that adult males weighed less and had smaller skulls than those captured and measured two decades ago. Global Climate Change In recent years, winter sea ice has fallen by at least 600,000 square miles, double the size of Texas. PHENOLOGY (4&5) Reserves & Protected Areas? Ursus maritimus Nail in Coffin?
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