POLS 1500 Lecture Notes - Lecture 4: Hydrosphere, Lithosphere, Exponential Growth
15 May 2018
School
Department
Course
Professor
Wednesday, May 9, 2018
Environmental Science
Unit 2:!
-Ecology: is described as the study of one’s house!
-Interactions of living and non-living components !
Focus attention to the processes and activities in the 4 spheres!
-Atmosphere: air and gases!
-Lithosphere: rock layer!
-Hydrosphere: water!
-Biosphere: Organisms!
The focus in ecology is restricted to the superficial layer of the Earth where life exists…
like the skin of an apple (we don’t examine the core)!
Levels of Organizations found in an Ecosystem!
-Species: Individuals that share a common genetic characteristics and able to breed
and produce viable offspring!
-Population: members of a species interacting in groups that live together in a
particular place or habitat!
-Community: consists of population of different species living in an area (living) !
-Ecosystem: is a community (living) interacting with its physical and chemical
environment (non-living)!
-Landscapes: connections linking several ecosystems in a particular region!
Systems are “Wired” with Feedback Loops!
-Ecosystems have interconnecting components. The components will be influenced
through these linkages to either “turn on” or be “cancelled out”!
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Document Summary
Ecology: is described as the study of one"s house. Focus attention to the processes and activities in the 4 spheres. The focus in ecology is restricted to the super cial layer of the earth where life exists like the skin of an apple (we don"t examine the core) Species: individuals that share a common genetic characteristics and able to breed and produce viable o spring. Population: members of a species interacting in groups that live together in a particular place or habitat. Community: consists of population of di erent species living in an area (living) Ecosystem: is a community (living) interacting with its physical and chemical environment (non-living) Landscapes: connections linking several ecosystems in a particular region. The components will be in uenced through these linkages to either turn on or be cancelled out . De ned: the output of the system feeds back into the system as an input and leads to changes in that system.
