The result indicates that great differences,which have significant influence on the aqua-plants,exist in the evapotranspire,the bio-mass,the root density and the root length.
In any navigation channel, the following activities are prohibited: abandoning sunken vessels, laying fishing implements impedimental to navigation, and cultivating aquatic plants.
As for the " horrible hands" themselves, recent research suggests that they were adaptations for digging up plant matter or raking in aquatic vegetation.