First, algal spores and a source of {HEAD ~ water} for {TAIL ~ treatment} are provided 
for
First , algal spores and a source of { HEAD ~ water } for { TAIL ~ treatment } are provided
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH