Final answer:
Chlorophyll concentration is measured using a spectrophotometer, where chlorophyll-a and b absorption at specific wavelengths indicate the levels, aiding in estimating Net Primary Productivity (NPP) by relating chlorophyll to the rate of photosynthesis.
Step-by-step explanation:
Chlorophyll concentrations:
Chlorophyll concentrations are measured using a spectrophotometer that assesses the absorption of light at specific wavelengths. Scientists extract chlorophyll from plants using an acetone solution and then measure the absorption at 663 nm for chlorophyll a and 646 nm for chlorophyll b. These measurements are crucial for estimating Net Primary Productivity (NPP), as chlorophyll content is directly related to an organism's potential to perform photosynthesis.
Knowing the chlorophyll levels allows researchers to infer the rate of photosynthesis. The NPP, a key component of ecosystem productivity, is the amount of carbon uptake after subtracting plant respiration from gross photosynthesis. By understanding the chlorophyll concentration, scientists can estimate the growth and health of plants, which directly affects NPP.