An ecologist studying a plot of ground in the tundra excludes all herbivores from her study area and estimates the plant biomass at 530 grams per square meter. She comes back to the same plot one year later and estimates that the biomass has increased to 670 grams per square meter. The difference in these two values, 140 grams, represents the __________ for that year.

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    food chain length
    trophic transfer efficiency
    net primary productivity
    food web complexity
    biological magnification

asked May 30, 2013 in Biology by anonymous

1 Answer

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net primary productivity
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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