Experiments in which ammonium nitrate (NH4NO3) was dripped into each stream over several months showed that biomass of the bryophyte F. antipyretica increased significantly when nitrogen was added, along with increased biomass of filamentous algae (mainly Cladophora).
Tilraun þar sem magn ammoníumnítrats (NH4NO3) var aukið í lækjunum leiddi m.a. í ljós að þekja og lífmassi mosans F. antipyretica og þráðkenndra grænþörunga, einkum Cladophora spp. jukust marktækt.