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1st Mid-term

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
% of pre-European invasion wetlands have been lost.   50  
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Types of Wetlands   Coastal & Inland  
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COASTAL.- Tidal salt marshes in the US (x 10^6 ha)   1.9 – mostly East Coast, Gulf Mexico  
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Tidal freshwater marshes (x 10^6 ha)   0.8 – big rivers East Coast, Gulf Mexico  
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Mangrove wetlands (x 10^6 ha)   0.5 – Florida, Texas, Louisiana  
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INLAND. - Freshwater marshes (x 10^6 ha)   27 – over half of U.S. in Alaska  
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Peatlands(x 10^6 ha)   55 – mainly in Alaska  
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•Freshwater swamps(x 10^6 ha) •Riparian systems   25 – in Southern U.S.  
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Total in Coastal & Inland over the US (x 10^6 ha)   110  
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% of U.S. Wetlands were lost from 1780’s – 1980’s   53 (almost the magic number in Env.)  
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Swamps and forested riparian wetlands decrease while...   marshes, shrub wetlands and non-vegetative wetlands have and increase.  
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Upland soils.   70 % soil, 15 % air, 15 % water Plants have access to all three  
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Wetland soils. Soils particles are submerged or saturated with water   70 % soil, 30 % water  
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Air spaces in roots and stems that diffuse oxygen to the plants roots (make up 50-60% of cross sectional root volume)   Aerenchyma  
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Air roots that protrude out of the ground and exposed during low tide (have lenticels). Found in Avicennia – black mangrove   Pneumatophores  
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Grow above the tidal level and have lenticels (holes for air entry).   Prop roots  
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Adaptations in most plants develop from the stem or trunk above the saturation zone   Adventitious roots  
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1/5 world's freshwater   Amazon River  
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Created by: SWES574
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