ecosystems 6 Flashcards
1
Q
what’s the mark-release-recapture method?💗🦈
A
capture a small species
mark them (eg spot of paint)
release them
wait a week then take a second sample
count how many are marked
(capture and mark in a harmless way)
2
Q
what is nitrification?🌷
what’s it carried out by?🌷
A
process in which ammonium is converted to nitrites and then nitrates
carried out by nitrifying bacteria
3
Q
why is the soil that nitrifying bacteria live in well aerated?💕
A
they require oxygen to oxidise ammonium to nitrate
4
Q
what is denitrification?💗
what’s it carried out by?😍
A
the process in which nitrates are converted back to atmospheric nitrogen gas
carried out by anaerobic denitrifying bacteria- don’t need oxygen
