n. pl. morÂ·pholÂ·oÂ·gies. 1. a. The branch of biology that deals with the form and structure of organisms without consideration of function. b. The form and structure of an organism or one of its parts: the morphology of a cell; the morphology of vertebrates. 2. Linguistics The study of the structure and form of words in language or a language, including inflection, derivation, and the formation of compounds.
Like algae, aquatic plants play a vital role in lake ecology because they provide cover, habitat, and food. However, too many plants can limit swimming, fishing, water skiing, boating, and aesthetic appreciation.
While underwater plants will help add oxygen to the pond during the daylight it will use up the available oxygen at night the same as other life in the pond. As such it is possible to have too much anacharis or other underwater plants in a pond. Underwater plants, such as anacharis, are important to the pond but their function is to use up nutrients to starve out the algae. There is a limit to the number of fish that you can keep in a pond. When you exceed this number you start having problems with water quality and fish health.