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Restoration of a Lake Ontario-connected fen through invasive Typha removal
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Restoration Ecology Vol. 30, #4, el13562
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2022-04
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Abstract
Lake-level regulation that began in 1960 eliminated large fluctuations of Lake Ontario water levels, altering coastal wetland
plant communities. More than a half century later, the altered hydroperiod supports dense, monotypic stands of invasive cattail
(Typha angustifolia and Typha glauca), which have diminished overall plant community diversity. As a result, Lake Ontario
coastal wetlands are less capable of providing many of their traditional ecological functions. One such wetland is Buttonwood
Fen, a floating, lake-connected peatland on Lake Ontario’s southern shore near Rochester, NY. We implemented cattailcontrol
measures from 2016 to 2018 with the goal of decreasing live and dead cattail biomass and increasing cover of native
fen taxa. Site manipulation included removal of dead cattail biomass, cutting new cattail growth when rhizome carbohydrate
reserves were at their lowest, and hand-wicking regrowth with herbicide in early fall. Results showed a decrease in live cattail
stem density and cover and dead biomass cover, as well as an increase in cover of fen taxa. Although not a replicated study, our
results suggest that removing dead cattail biomass and targeted treatment of live cattail stems via cutting and hand-wicking
with glyphosate can reduce cattail and improve site quality.