When primary productivity is high, standing crop remains high and nearly constant.

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Primary productivity refers to the rate at which energy is converted by photosynthetic and chemosynthetic autotrophs to organic substances. A high primary productivity does not guarantee that standing crop (the total biomass of photosynthetic autotrophs at a given time) remains high and nearly constant, as it can be influenced by various factors such as herbivory, seasonal changes, and disturbances that affect biomass accumulation and turnover rates.

When Primary Productivity Is High, Standing Crop Remains High and Nearly