There are three basic types of freshwater ecosystems: 1  Lentic: slow moving water, including pools, ponds, and lakes. 2  Lotic: faster moving water, for example streams and rivers. 3  Wetlands: areas where the soil is saturated or inundated for at least part of the time.
Pediatricians earn an average hourly wage of $95.10. Pediatricians earn an average salary of $197,800 per year.
Pediatricians employed on a contract basis report salaries in the range from $117,916 to $152,605 a year, while those who are self-employed earn between $89,396 and $211,126 annually according to Payscaleâs salary statistics.