Study Guide for Midterm

Study Guide for Midterm - Midterm Study Guide Unit 1...

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Midterm Study Guide Unit 1 Introduction · Know the critical components that define a wetland Soil, Hydrology, Vegetation, growing season, duration of inunda- tion, proximity of saturation/inundation close to surface Hydrology- dictates oxygen availability, biogeochemical cycles, organism selection/sur- vival, temp regulation, etc. · What are major functions and values we attribute to wetlands? -Water Quality (wetlands can act as a long-term storage sink for contaminants removing them from surface water. can be a trans- former of contaminants resulting in different, less toxic com- pounds.) -Water Supply -Habitat (variety and sustainability of wildlife) -Food Web Connections (vegetation provides forage, detrital ma- terial, nursery grounds for fish) -Flood Control -Fisheries -Education -Recreation · What is the difference between value and function? value- g/s wetlands provide fxn- natural processes that exist regardless of their perceived value to society · Understand some of the chronology of wetland losses in the US. Unit 2: Hydrology · Understand the terms hydroperiod and hydropattern Hydroperiod- # occurences/year a wetland is flooded. lumps together frequency and dura- tion and not other components of hydrology ex- HPe of 180 days indicates water was standing at that location for 180/365 days of the year, or plant species could tolerate 60 day HPe could withstand flooding 60/365 days Hydropattern- Depth, Duration, Frequency, Timing/Season, Flow · Components, differences, how each component relates to potential stress on vegetation Frequency- #times wetland is flooded or under saturated conditions in given time period. Determines dry/wet seasons for cultivation purposes Duration- length of single flooding event. ex- March 3-20, 17 day duration. if plant can- not withstand long periods of flooding, the duration will drown the plant
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Depth- depth of water in wetland or given point in wetland during flooding event. often based on minimums and maximums. more consistent in treatment wetlands or those adja- cent to control structures. This will affect the water table and which plants can withstand low/high water tables Timing/Season- period of the year flooding is likely to occur. becomes critical when ana- lyzing respiration rate of organism (greater or less than available oxygen can result in hypoxia) temperature is huge component regulating metabolism- time of year of flooding is relative to when an organism would be most active Flow- movement of water. sediment transports, deposition, nutrient limiting conditions · Know what a hydrograph is and terminology associated with it measure of depth or volume over time. Rising limb, Recession limb; storm runoff under- neath peak, base flow determining “surface” each storm event has duration and intensity, each watershed has signature hydrograph for each rain event. if water depth is measured over time, integrating flooding and draining events produces graph that can predict flora, fauna, BGC processes. · Know how to calculate various components of hydropattern from a hydrograph
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Study Guide for Midterm - Midterm Study Guide Unit 1...

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