-What are the products and reactants of chemosynthesis
-What substance cam be measured in the water to estimate the amount of primary production?
The answer to your first question can be found at
http://www.answers.com/topic/chemosynthesis
With regard to your second condition, I assume you mean primary production of carbohydrates by photosynthesis. The rate of production of biomass can be used. It is associated with the presence of algae. See
http://en.wikipedia.org/wiki/Primary_production#Oceanic_production
To answer your first question about the products and reactants of chemosynthesis, chemosynthesis is a process used by certain bacteria and other organisms to obtain energy by converting inorganic substances into organic compounds. Instead of sunlight like in photosynthesis, chemosynthesis relies on chemicals as an energy source.
The reactants for chemosynthesis can vary depending on the organism involved, but typically include inorganic compounds such as hydrogen sulfide or ammonia. These inorganic compounds are oxidized (meaning they lose electrons) to provide energy for the organism.
The products of chemosynthesis are organic compounds, which can include carbohydrates, proteins, and lipids. These compounds serve as the fuel or energy source for the organism carrying out chemosynthesis.
Moving on to your second question, the substance that can be measured in water to estimate the amount of primary production is chlorophyll-a. Chlorophyll-a is a pigment found in plants, algae, and cyanobacteria that is responsible for capturing light energy during photosynthesis.
Primary production refers to the process by which organisms convert solar energy into organic compounds through photosynthesis. Since chlorophyll-a is an essential component for photosynthetic organisms, its concentration in the water can provide insights into the amount of primary production occurring.
To estimate the amount of chlorophyll-a, water samples are collected and analyzed using a spectroscopic technique called fluorometry. This technique measures the fluorescence emitted by chlorophyll-a when it is excited by light of a specific wavelength. By quantifying the fluorescence, scientists can determine the concentration of chlorophyll-a, which in turn can be used as an indicator of primary production in the water.