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Shiro TSUYUZAKI
Plant community ecology / Environmental conservation

Mount Usu / Sarobetsu post-mined peatland
From left: Crater basin in 1986 and 2006. Cottongrass / Daylily

(First update on March 31 2005. Last on June 26 2011)

Productivity

Primary productivity (生産力)
Gross primary productivity, GPP = energy (or carbon) fixed via photosynthesis per unit time
Net primary productivity, NPP = GPP - energy (or carbon) lost via respiration per unit time
= ΔB + L + G

ΔB = biomass change in the community between time 1 (t1) and time 2 (t2) = B2 - B1

L = biomass losses by death of plants or plant parts
G = biomass losses to consumer organisms

NPP

Net ecosystem productivity, NEP= NPP - heterotrophic respiration
Net biome productivity, NBP= NEP - loss due to disturbances

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References
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