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.
Tip of the Week: If you're planning to return to work, you might want to begin checking out child care in your area. Nannies cost about $250 to $600 per week, group day care typically ranges from $125 to $200 per week, and home day care runs from about $75 to $125 per week.