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18ChesBayShortandYou

18ChesBayShortandYou - Chesapeake Bay A Model for...

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Chesapeake Bay A Model for Environmental Management
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Chesapeake Bay Watershed 64,000 mi
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Threats to the Bay N UTRIENTS S EDIMENTS T OXIC CHEMICALS H ABITAT LOSS O VERFISHING
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Threats to the Bay NUTRIENTS S EDIMENTS T OXIC CHEMICALS H ABITAT LOSS O VERFISHING
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Chesapeake Bay Watershed Cross-section Young – Geologically Formed by melt of last ice age River channel Fall Line
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Historically Mid to late 1800s annual harvest 20 million bushels 1950s – 4 million bushels By March 2003 – 38,000 bushels from MD hardly any from VA Bay This is Record LOW harvest
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http://www.chesapeakebay.net/oysterharvest.aspx?menuitem=15320 2007 about 100,000 bushels
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Source: Chesapeake Bay Program Monitoring Subcommittee. >2mg/L <2mg/L (stressful) Dissolved Oxygen Status (1994 - 1996) York Rappahannock Potomac Patuxent Patapsco Chester Choptank Eastern Bay Bush South Rhode Mobjack Bay Piankatank Corrotoman West Sassafrass Middle James Nanticoke Manokin Back Appomattox Mattaponi Pocomoke Fishing Bay North Tangier Sound SouthTangier Sound Bottom Dissolved Oxygen Concentrations in the Mainstem Bay and Tidal Tributaries STATUS: Stressful dissolved oxygen conditions occur during summer months throughout much of the mainstem Bay and up
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