Chapter 4 (Ecosystems)
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What is an ecosystem?
A natural unit consisting of all the plants, animals and micro-organisms in an area together with the non-living aspects of the environment
Each ecosystem consists of a balanced interaction between the…
Biotic factors & abiotic factors
What is a biotic factor?
Living components like plants, animals and micro-organisms
What is an abiotic factor?
Non-living factors like rocks & water.
List 7 abiotic factors.
~Soil ~Temp ~Light ~Physiographic factors ~Rainfall & climate ~Atmospheric gasses ~Fire
Why is soil important to the ecosystems?
~ Soil is a habitat to organisms ~ Plants can anchor their roots ~ Source of mineral salts for plants and animals ~ Decomposition of organic material
What components does soil consist of?
~ Mineral component ~ Humus ~ Micro organisms ~ Water ~ Air
What is Humus?
Dead plants and animals matter the was broken down by decomposers, it is an important process to the ecosystem as it recycles nutrients
What are the soil types?
Sand, Loam & Clay