permaculture

[Claude William Genest <genest@pivot.net>]

Hi All,

Can anyone tell me to to what extent reeds either add or remove oxygen 
from a pond ? I am meeting with a municipal biologist next week who is 
hell bent on removing ALL the  reeds around a pond and her principal 
arguments are that this must be done because the reeds are "invasive" 
and deplete oxygen - I thought the roots pumped out oxygen allowing a 
place for water purifying bacteria to live ?

Thanks in advance,

Claude