| Term 1 (intervention) | AND | Term 2 (intervention) | AND | Term 3 (subject) | AND | Term 4 (outcome) |
---|---|---|---|---|---|---|---|
 | wetland* |  | construct* |  | nitrogen |  | retention |
OR | pond | OR | create* | OR | phosph* | OR | trap* |
OR | mire* | OR | restor* | OR | nitrate | OR | denitrification |
OR | marsh | OR | man*made | OR | TKN | OR | uptake |
OR | fen | OR | flooding | OR | ammoni* | OR | sedimentation |
OR | wet meadow | OR | inundation | Â | Â | OR | remov* |
OR | riparian | OR | artificial | Â | Â | OR | settling |
OR | flood plain | Â | Â | Â | Â | OR | accretion |
OR | reed | Â | Â | Â | Â | OR | precipitation |
 |  |  |  |  |  | OR | *sorption |