Ecosystems Flashcards
1
Q
Nitrogen-fixing bacteria
soil and in plant roots
A
azotobacter: free in soil
rhizobium: mutualistic bacteria in nodules
2
Q
nitrifying bacteria
A
nitrosomas
3
Q
outline succession
A
barren land
pioneer community ie lichen/moss
secondary colonizer ie moss
tertiary colonizer ie grass
climax community with trees
4
Q
adaptations of pioneer species
A
large quantity of seeds/spores
tolerant to extreme conditions
ability to fix nitrogen from the atmosphere to the soil
