Which of the following statements about net primary productivity (NPP) is FALSE?NPP typically decreases with increasing temperatureO In aquatic systems, NPP can be measured by monitoring the change in O2concentration over timeNPP is often limited by N and P in terrestrial and aquatic systemsO In temperate systems, NPP is typically higher in the summer and lower in thewinterO In terrestrial systems, NPP can be estimate by monitoring the change in plantbiomass over time

An ecosystem is a geographical area where living organisms' community lives in association with the non-living components of nature. The energy flow and biochemical flows connect biotic and abiotic factors.There are different types of ecosystems present on Earth. A few examples are forest, grassland, aquatic, tundra, etc. The forest ecosystem is one important ecosystem of Earth. Primary productivity is the rate at which the energy gets converted into organic substances by the process of photosynthesis. The net primary productivity is the amount of carbon taken up by any plant.It is calculated by determining the amount of carbon dioxide taken up by the process of photosynthesis minus the carbon that gets lost during respiration. Therefore, from a particular point if we want to calculate the net primary productivity, the difference in dry mass from final to initial point will give the value. And NPP increases with increasing temperature. Therefore, statement A is wrong about NPP. Hence, the correct answer is option A.In a terrestrial ecosystem the NPP can be determined measuring the change in biomass over time. As nitrogen and phosphorus are two important element for plants physiology, hence, the availability of those elements affects the NPP. The NPP reduces if these two elements are not enough. Whereas, for aquatic ecosystem, the NPP can be determined by measuring the change in oxygen level, as oxygen is essential and consumed up for primary production. Therefore, rest of the options are incorrect answers.