ecosystems 6

Question 1

what’s the mark-release-recapture method?💗🦈

Answer 1

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)

Question 2

what is nitrification?🌷
what’s it carried out by?🌷

Answer 2

process in which ammonium is converted to nitrites and then nitrates
carried out by nitrifying bacteria

Question 3

why is the soil that nitrifying bacteria live in well aerated?💕

Answer 3

they require oxygen to oxidise ammonium to nitrate

Question 4

what is denitrification?💗
what’s it carried out by?😍

Answer 4

the process in which nitrates are converted back to atmospheric nitrogen gas
carried out by anaerobic denitrifying bacteria- don’t need oxygen