Following a logging event, forest ecologists assess changes in microbial biomass. They apply chloroform fumigation-incubation and compare CO₂ evolution from fumigated and non-fumigated soils. What does an increase in CO₂ from the fumigated soil relative to the control indicate?

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That microbial cells were lysed, and their organic material was mineralized by surviving microbes

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That chloroform inhibits respiration in live microbes

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That oxygen contamination interfered with the assay

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That microbial biomass was negligible before the disturbance

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Following a logging event, forest ecologists assess changes in microbial biomass...

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