Biomass Measurement: Dry Weight — NEET Biology
📚 Practice ConceptEach trophic level has a certain mass of living material at a particular time called as the standing crop. The standing crop is measured as the mass of living organisms (biomass) or the number in a unit area. The biomass of a species is expressed in terms of fresh or dry weight. Measurement of biomass in terms of dry weight is more accurate. Why?
Which of the following statements regarding the pyramid of biomass are NOT correct? S1: The standing crop, representing the mass of living organisms at a specific time, is more accurately measured in terms of fresh weight. S2: In most terrestrial ecosystems, the pyramid of biomass is typically inverted, with a greater biomass observed at higher trophic levels. S3: An inverted pyramid of biomass in the sea is a consequence of the biomass of fishes significantly exceeding that of phytoplankton. S4: Unlike the pyramid of energy which is always upright, the pyramid of biomass can be both upright and inverted depending on the ecosystem. S5: For an accurate ecological pyramid representation, the calculation of biomass must include all organisms at a particular trophic level.
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