Chapter 13 Flashcards
what is calirometery
the burning of a dry sample in pure oxygen in a sealed container
what is GPP
chemical energy stored in plant biomass in a given area or volume
what is NPP
chemical energy store in plant biomass after respiratory losses to the environment have been taken account for
NPP equation
NPP = GPP - R
Net production of consumers equation
N = I - (F + R)
N = net production of consumers
I = chemical energy stored in ingested food
F = chemical energy transferred to the environment
R = respiratory energy transferred to the environment
Nitrogen Cycle image
where is N present
biological molecules, gas in the atmosphere, ammonia, ammonium ions, nitrates, nitrites
Mycorrhizae’s role in nutrient cycles
improve plant’s uptake of water and ions
Nitrogen-fixing bacteria’s role in nutrient cycles
reduce nitrogen in air to ammonia
Saprobionts’ role in nutrient cycles
decomposers that release phosphates, ammonia and ammonium ions
Nitrifying bacteria’s role in nutrient cycles
bacteria that oxidise ammonium ions to nitrites and nitrites to nitrates
Denitrifying bacteria’s role in nutrient cycles
use nitrates to respire anaerobically and release nitrogen gas
2 types of fertiliser
artificial and natural
Eutraphocation
The nutrient pollutes the water leading to nutrient enrichment, leads to algal bloom, algae then die, algae are decomposed aerobically by bacteria and use up O2 in water, water becomes anoxic so fish and invertebrates die, species diversity decreases
Phosphorous Cycle image
