Flashcards in Photosynthesis and climate change Deck (23)
relationship between photosynthesis and cellular respiration
photosynthesis provides the carbohydrates and oxygen for cellular respiration to take place
What is the very basis of life on earth?
What happens to oxygen in photosynthesis?
it is oxidized
electrons are pulled further away from oxygen
What happens to carbon in photosynthesis?
it is reduced
Where does the water come from for photosynthesis?
formed by the internal membranes of chloroplasts
stacks of thylakoids
Thylakoid membranes contain...
large quantities of photoreactive pigments
the fluid filled space between the thylakoids and the inner membrane
Primary producer / autotroph
synthesizes its own food from inorganic sources
Gross primary productivity
total amount of chemical energy produced in a given area and time period
Net primary productivity
remaining energy that is not lost through cellular respiration within plants
gross - cell resp
eat living organisms
Where is energy primarily used?
90% is used for cellular respiration or is unused
only 10% contributes to biomass
has a much greater impact on the distribution and abundance of the surrounding species than its abundance and total biomass would suggest
What do changes in the keystone species create?
a trophic cascade
What makes an ecosystem more stable?
the prevailing long term temperature and precipitation in an area
consists of specific short term atmospheric conditions of temperature
What does variation of temperature and precipitation result in?
regions characterized by distinct abiotic characteristics and dominant vegetation types
Where does carbon naturally come from?