These refer to the variety of living organisms found in bodies of water
Biological characteristics
How can biological characteristics be measured?
Through primary productivity and through population estimate and structure
Primary productivity describes the?
Rate at which plants assimilate carbon and convert it into organic compounds during photosynthesis
How can primary productivity be measured?
By measuring the amount of oxygen consumed and produced by photosynthetic organisms
What are the two components of primary productivity
Gross productivity and Net productivity
What is gross productivity
It measures the total amount of oxygen produced during photosynthesis
What is net productivity?
It measures the amount of oxygen used during aerobic respiration
Primary productivity can be measured through?
Production of DP
increase boomasss
Co2 uptake
Winkler method
Light and dark bottle comparison
How wil the primary productivity estimate be done in this activity
Through Light and dark bottle technique and chlorophyll analysis
What is the title of activity 4
Biological characteristics of water
(Primary productivity and population and community structure)
What is the most common aquatic organisms present in water that perform both photosynthesis and respiration?
Microscopic planktons
What is light and dark bottle technique?
A way of measuring primary production by comparing dissolved oxygen before and after incubation
Methods for the determination of chlorophyll a
- Fluorometry
- High-performance Liquid Chromatography (HPLC)
- Spectrophotometry
What is spectrophotometry
What is fluorometry
Chlorophyll a fluoresces at a wavelength of 663 nm when excited by radiation ar 430 nm. Determination is carries out in a fluorometer
What is High-performance Liquid Chromatography
Makes use of HPLC to separate various algae derive chlorophylls and their degradation products.
Capable of detect chlorophylls a, b, and c and many of their degradation products in a single run
What is community structure
The composition of a community, including the number of species in that community and their relative numbers
