lake home with vegetation harvester

agriculture algae aquatic blooms canary choke clogging contaminate curlyleaf current cut cutter cyanobacterial decompose drain dredge dredger environment eurasian fertilizer flea floating grass grate growth habitat harmful harvester herbicide humans hydrilla improve invasive lake life loosestrife man management marine microbes mussells native nature nitrogen nutrients overgrown overgrowth pesticides phosphorus phytoplankton pond protect provide public purple quality recreation reed resources restoration river rocks runoff sediment shoreline skimmer soil species spiny trees vegetation water watermilfoil waters watershed weeds wildlife zebra