invasive zebra and quagga mussel shells litter thecayuga lake shoreline in winter

asianclam chinesemysterysnail quaggamussel zebramussels floatermussel biodiversity invasive dangerous plentiful trillions freshwater fingerlakes cayuga nys flx newyorkstate propagation mussels clamshells tinyclam snail native competition aquatic hitchhiker piers rocks pebbles water cold winter shoreline drained clogpipes biomass hypolimnetic environment dreissenid cce usnps nygov fingerlakesinvasives nature biology science lakeshore lake myerspark lansing ithaca saltpoint snow ice february