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.
For pediatricians, average salaries started at $161,732 and rose to $229,041 per year. The salaries for internists ranged from a low of $188,500 to a high of $236,544 per year. Obstetrics and gynecology paid slightly better, with average salaries ranging from $247,680 at the low end to $420,000 at the high end.