Chapter 4 The Organization of Life Section 1: Ecosystems ...
The Organization of Life
Section 1
Chapter 4 The Organization of Life Section 1: Ecosystems: Everything is Connected
DAY 1
The Organization of Life
Defining an Ecosystem
? Ecosystems are communities of organisms and their abiotic environment.
? Examples are an oak forest or a coral reef.
? Ecosystems do not have clear boundaries.
? Things move from one ecosystem to another.
? Pollen can blow from a forest into a field, soil can wash from a mountain into a lake, and birds migrate from state to state.
Section 1
The Organization of Life
Section 1
Levels of Ecological Organization
The Organization of Life
Section 1
The Components of an Ecosystem
? In order to survive, ecosystems need five basic components:
? energy
? mineral/nutrients
? water
? oxygen
? living organisms
? Plants and rocks are components of the land ecosystems, while most of the energy of an ecosystem comes from the sun.
? If one part of the ecosystem is destroyed or changes, the entire system will be affected.
The Organization of Life
Biotic and Abiotic Factors
? Biotic factors are environmental factors that are associated with or results from the activities of living organisms which includes plants, animals, dead organisms, and the waste products of organisms.
? Abiotic factors are environmental factors that are not associated with the activities of living organisms which includes air, water, rocks, and temperature.
? Scientists can organize these living and nonliving things into various levels.
Section 1
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