Distribution, Growth, and Phosphorus Relationships of Water Milfoil in Lake Winnipesaukee, New Hampshire

摘要

Myriophyllum heterophyllum Michx. has been described as the dominant aquatic vascular plant in the littoral of Lake Winnipesaukee, N.H. Its distribution, throughout the lake, was mapped and its habitat preferences were noted. The plant is present in areas with a silt-sand substrate and low wave action at depths of 0.5 to 3 m. The density of the stands was determined at three sites. Rapid colonization and stand expansion occurred through vegetative reproduction. Tissue phosphorus levels of M. heterophyllum varied seasonally during 1975-1976 and reached a maximum of 0.75% dry weight during late May. A correlation between tissue phosphorus and sediment phosphorus was observed for the three study sites.