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.
Average child care fees for one infant range from $3,803 to $13,480 a year, according to the National Association of Child Care Resource and Referral Agencies, a network of more than 850 child care resource and referral centers based in Arlington, Va. The costs vary widely based on where a family lives.ingle parents would have to pay nearly $3 of every $10 they earn. Some states where child care is least affordable, based on average costs for a 4-year-old in a center: New York, Minnesota, California and Massachusetts.