Delineating Invasive Plant Beds the Easy Way

Effective management of invasive aquatic plants requires some fundamental but previously difficult prerequisites.  First, you have to find the infestations; not easy when you can’t see underwater.  Second, you have to create boundaries of the infestation; also not easy when you can’t see underwater or when the plant does not behave and form perfect surface-growing patches that you can trace with your GPS.  So it used to be a game of darts using whatever tools available (e.g. rakes, manual interpretation of GPS and sonar, aquascopes, snorkeling, scribbling on paper maps) to crudely estimate the extent of invasive plant growth.  Needless to say, delineations using this technique have been crude leading to equally crude and often ineffective management.

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