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Wetlands

TermDefinition
What hat stress is common to all wetlands Low oxygen, or anaerobic conditions
Three things used to define a wetland Hydric soils, hydrology adapted plants, and general hydrology
How do the three wetland features relate to eachother Hydrology causes the diffusion of oxygen to be slower, creating anaerobic conditions, and specific plants can exist due to these conditions. Hydric soils exist from the unique processes that take place.
What is delineation? Defining the boundary between wetlands and uplands.
Why do we delineate wetlands? Inventory and regulation
What are some wetland services? Carbon sequestration, flood prevention, habitat, improving water quality.
Why do wetlands sequester more carbon? Lower decomposition due to lower oxygen levels
GPP Total CO2 taken up by autotrophs
NPP Total uptake - CO2 released during respiration
NEP NPP - autotrophic repsiration
Mineralization Organic -> Inorganic
Assimilation Cleaning of water i.e. removing nitrogen. Inorganic -> Organic
Would assimilation be higher in a cyprus dome or cyprus in a floodplain? Floodplain (associated with the floodplain)
What dictates how wet a wetland is? Precipitation, evapotranspiration, and topography
Define hydrologic regimes Spacial and temporal variations in water levels.
Water regime metrics Maximum, minimum, and flooded area
Wate CREATES water regimes? Water budget and bathymetry
How to measure water regimes Install a sensor and survey the land to determine bathymetry
Weir Uses fixed geometry and a known equation
Darceys equation Ksat, dH and dL
Major soil components Gas, water, solids
Favorite wetland system Tital salt marshes
How can fens become bogs Fens are initially fed by groundwater, making them less acidic. As peat accumulation occurs, the land surface rises above the water table and the system switches water sources to rain fed. This increases acidity and changes vegetation composition.
What does a positive NEP represent? Carbon sequestration is occuring.
Peatlands Store 25-33% of global soil c.
Why does peat accumulate? Low decomposition due to: water logged conditions, low temperature, low nutrients, low pH.
Created by: jackscarbs
 

 



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