Upload
lucita
View
31
Download
1
Tags:
Embed Size (px)
DESCRIPTION
Sentinel Molecular Diagnostics for Crop Agroterrorism Dr. Joe Eugene Lepo Center for Environmental Diagnostics and Bioremediation University of West Florida, Pensacola Tuesday, February 13th, at 4:30 – 5:30 p.m. Ruhl Student Center, Community Room. - PowerPoint PPT Presentation
Citation preview
Sentinel Molecular Diagnostics for Crop Agroterrorism
Dr. Joe Eugene LepoCenter for Environmental Diagnostics and Bioremediation
University of West Florida, Pensacola
Tuesday, February 13th, at 4:30 – 5:30 p.m.Ruhl Student Center, Community Room
STSS07 Schedule & Abstract Site (click here)
Wetlands• Characteristic hydric soil and hydrophytic vegetation as
signs of frequent surface saturation or inundation.
• Many types of wetlands: (Dodds, 2002; Table 4.3)– Salt-marshes and (temperate, seawater influence)– Mangrove forests (tropical, seawater influence)– Tidal & non-tidal freshwater marshes– Deepwater (cypress) swamps– Northern (bogs & tundra) wetlands– Riparian forests/wetlands– Man-made (rice paddies & bioremediation)
• Function as nutrient and sediment traps; slow runoff and facilitate recharge; most are highly productive.
Global Distribution
(Matthews, 1993)
Coastal Mangrove
Depressional
Peatland bog
• Wetland ecosystem types are based on hydrologic regime, climate, geomorphology, nutrient input and vegetation. (Dodds, 2002; Table 4.5)
• Geomorphic: Peatlands; Coastal; Riverine; Depressional.
• Hydrologic Regime:– Permanence, predictability (e.g. tidal), seasonality– Primary water source:
• Precipitation; low throughput (ombrotrophic)• Riverine; potentially high throughput (minerotrophic)• Groundwater
• Climate determines the balance of precipitation and evapotranspiration. (E.g., much less precipitation is required for tundra wetlands than that for a tropical savanna wetland.)
Human Impacts on Groundwaters; Streams and Wetlands
• Groundwater or surface pumping:– agriculture – industry – drinking waters.
• Clearing riparian forests & wetlands• Draining and filling for “development”.• Damming and flooding• Diversion channels for water supply.
Levee
Arkansas River (?)
Vanishing Florida Wetlands
Wetland loss from 1780 to1990.70% Riparian Forest lost in USA.
Worldwide estimates are >50%; half due to agriculture.