Unit 2 Ecology

By: Christopher Crumbley

Standard and Element

SEV2. Students will demonstrate an understanding that the earth is one interconnected system.

Standard and Element

A. Describe how the abiotic components (water, air, and energy) affect the biosphere.

B. Recognize and give examples of the hierarchy of the biological entities of the biosphere (organisms, populations, communities, ecosystems, and biosphere).

C. Characterize the components that define a Biome. Abiotic Factors - to include precipitation, temperature, and soils. Biotic Factors - plant and animal adaptations create success in that biome.

D. Characterize the components that define fresh - water and marine systems. Abiotic Factors - to include light, dissolved oxygen phosphorus, nitrogen pH, and substrate. Biotic Factors - plant animal adaptations characteristic to that system.

Unit Summary

A.Describe how the abiotic components (water, air, and energy) affect the biosphere.

There are three abiotic components that affect the biosphere. Water, air, and energy affects the biosphere by availability and ion concentration and temperature are important limiting factors for most organisms. For air (wind, currents) can affect rates of exchange, or present an important distance regime. The last one is energy and for energy it requires to drive ecosystems and comes primarily from light, but sometimes from chemicals.

Key terms and Examples

Abiotic Factors are the nonliving parts of the ecosystem.

Example:water, sand, air temperature, and rocks

Biosphere is the part of the earth where life exists.

Example: Made up of the water, land living things and air

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Abiotic Factor Real World Application

Abiotic factors are nonliving things in an ecosystem. Abiotic factors comes in all types and can vary among different ecosystems. For example, abiotic factors found in aquatic systems may be things like water depth, pH, sunlight, turbidity (amount of water cloudiness), salinity (salt concentration), available nutrients (nitrogen, phosphorous, etc.), and dissolved oxygen (amount of oxygen dissolved in the water). Abiotic variables found in terrestrial ecosystems can include things like rain, wind, temperature, altitude, soil, pollution, nutrients, pH, types of soil and sunlight.
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