Aquatic Ecology ( BIOL 435). Course Introduction Field Component Friday’s Assignment What is Limnology? (lotic vs lentic) Why Care About Water? Hydrologic Cycle. What is Limnology?. Is it aquatic ecology? Marine versus inland waters Inland waters versus freshwater
What is Limnology? (lotic vs lentic)
Why Care About Water?
“Limnology is the study of the structural and functional interrelationships of organisms of inland waters as they are affected by their dynamic physical, chemical, and biotic environments.” (Wetzel, 2001)
These volumes reside in their location (reservoir) for very different time scales. Ice caps for 16,000 y. Oceans for 3100 y. Groundwater for 300 y. Lakes from months to 100s y. Large rivers for 10-20 d. Atmosphere < 10 d.
(Dodds, 2002; Table 1.1)
Resource crises in developing nations is increasing with freshwater as a primary concern. These populations are simply not coping with increasing resource limitation. (Wetzel, 2001; Fig 1-1)
Check out our luxury use compared to other countries with ample water supplies, i.e. Switzerland. (American vanity?)
(Dodds, 2002; Table 1.2)
(Dodds, 2002; Fig 1.3)
The Hydrologic Cycle is driven largely by the energy from solar radiation, Earth’s gravity, the rotation of the Earth (Coriolis Effect), Gravity of Moon and Sun (ocean tides).
Solar energy drives evapotranspiration and winds.
Solar energy and winds drive water movement, via thermal density differences and wave propagation, respectively.
Coliolis Effect influences the direction of wind and ocean circulation.
Earth’s gravity influences precipitation and surface and subsurface flow.