An estuary mouth and coastal waters, part of an aquatic ecosystem An aquatic ecosystem is an ecosystem in a body of water. Communities of organisms that are dependent on each other and on their environment live in aquatic ecosystems. The two main types of aquatic ecosystems are marine ecosystems and freshwater ecosystems.[1]
The cost of a pediatrician office visit will vary by region and by the individual doctor. On average, expect to pay $75 to $200 for a standard visit.
The average annual cost of full-time care for an infant in a child care center ranges from $4,863 in Mississippi to $16,430 in Massachusetts.In 31 states and the District of Columbia, the average annual cost for infant day care was higher than a year's tuition and fees at a four-year public college in 2012.n 31 states and the District of Columbia, the average annual cost for infant day care was higher than a year's tuition and fees at a four-year public college in 2012.