Terrestrial Ecosystems and Global Primary Production
Explore the complexities of terrestrial ecosystems and global primary production, diving into concepts like net primary production, respiration, and uncertainties in production rates. Learn about the significant role these processes play in sustaining life on Earth and the global ecosystem balance.
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Presentation Transcript
Luyssaert Reading Support Critical Zone Science InTeGrate Teaching Team (Washburne, UA) 1
NOTATION GPP = NPP + Ra (always a sink) NPP = fNPP + wNPP + rNPP + mNPP = biomass NEP = NPP Rh GPP = NEP + Re (eddy covariance) Re = Ra + Rh; Rs = Ra + Rh (below ground part) Respiration: autotrophic (plants) or heterotrophic (microbial) 2 after Luyssaert, etal, GCB, 2007
How much is there? Terrestrial Ecosystems Net primary Production Can be factor of 2 uncertainty in rates! Huston & Wolverton, Ecol .Mono, 79(3), 2009 By Permission: J. Wiley Lic. 3926591180194, 8/9/16 3
How much is there? Global Ecosystems Gross Primary Production Global % NPP AREA ~37 GTC ~5.1 x 1014 m2 => 168 GTC/y Data after RH Whitaker as found on Wiki/Primary_production 4
