Chapter 56: Ecosystems and Global Ecology

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8 Apr 2011
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Chapter 56 Ecosystems & Global Ecology
What are the compartments of the global ecosystem?
Earth is a closed system with respect to matter
Earth is an open system with respect to energy
Energy is primarily from the sun; continual
Earths four compartments:
1.Oceanswhere almost everything ends up at the end of a cycle
Only cycle materials at the surface of the oceans
Materials cycle through slowly
Up-welling zoneswhere the water gets shallower near shores,
resulting in a cycling of nutrients (from the bottom of the ocean
upward)
Most fisheries located here
2.Fresh Watersnutrient cycling is faster
Surface water is very rich in oxygen, but not nutrients and
elements
TurnoverCycling happens through changes in temperature
When water is 4 degrees, it is most dense
Thermoclinewhen warm surface water is less dense and cooler
water is more dense
3.Atmosphere
Stratospherecontains ozone layers
Troposphere were exposed to this compartment, contains
nutrients and water vapour, where cycling takes place
Intertropical convergence zonewarm winds come in, rise, release
water, and air currents rise into atmosphere
4.Land
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Document Summary

earth is a closed system with respect to matter. earth is an open system with respect to energy. energy is primarily from the sun; continual. Intertropical convergence zonewarm winds come in, rise, release water, and air currents rise into atmosphere: land www. notesolution. com, cycling occurs through organisms, through ground water, the terrestrial land cycles. solar energy is the main sources of energy for most of organisms reproduction: gross primary productivityrate at which energy is incorporated into photosynthesis. does not produce energy, but transfers energies into usable forms that are needed by organisms. net primary productivityphoto-synthesisers harness some of the energy they receive from the sun, the rest is left for the herbivores or primary consumers. where areas are dry, photo-synthesisers are less likely to live. primary production tends to be higher near the equator.

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