Teaching MPPSC Assistant Professor Mock Test Series 2025 Life Sciences Ecological Principles Ecosystem Ecology
Which one of the following statements pertaining to global ocean ecosystem productivity is NOT correct?
1
Higher chlorophyll concentrations and the general higher productivity ob- served around the equator is driven by the process of upwelling and/or mixing of high nutrient subsurface water into the euphotic zone.
2
In some temperate and subpolar regions, productivity is least during the spring due to the transitioning of phytoplankton from light-limiting to nutrient-limiting conditions.
3
In the nutrient-poor tropical and subtropical ocean, the cyanobacteria tend to be numerically dominant, as they specialize in taking up nutrients at low concentrations.
4
Larger phytoplankton, such as diatoms, often dominate the nutrient-rich polar ocean, and these can be grazed directly by multicellular zooplankton.