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.
The profession requires a doctorate as well as internship and residency, and earnings are commensurate with a pediatrician's experience, education and training. National Averages Pediatricians in the United States earn an average annual salary of $168,650, according to May 2011 data from the Bureau of Labor Statistics (BLS). The lowest 10 percent of pediatricians reported income of $85,850 or less per year. States with Highest Averages. When it comes to salaries, location is an important factor. According to the BLS, pediatricians earned the highest average salary in Nebraska, with annual average wages of $217,270. Pediatricians in Montana earned slightly less, averaging $216,050 per year. In Oregon, these physicians earned an average of $212,800 per year, and in South Dakota, their average salary was $211,550.