ESS TOPIC 2 - THE ECOSYSTEM

Biotic and Abiotic Components
1. Biotic refers to the living components within an ecosystem (the community).
2. Abiotic refers to the non-living factors of the ecosystem (the environment). Ecosystems can be divided into 3 types, and each ecosystem type has its own specific abiotic factors
  1. Measuring Abiotic components of an ecosystem
    1. Light can be measured using a light meter
    2. Use an electronic thermometer with probes so you can measure in soil, water and air.
    3. Wind can be measured by observinf the effects of wind on objects
    4. pH can be measured using a pH meter or a datalogging probe. Soil pH can be measured using a soil-test kit. Should be cleaned after every use.
  2. Freshwater (rivers, lakes and wetlands): turbidity, flow velocity and pH
  3. Terrestrial (land based): temperature, light intensity, wind speed, particle size, slope, soil moisture, drainage, mineral content
  4. Marine (the sea, estuaries, salt marshes and mangroves): salinity, pH, temperature, dissolved oxygen, wave action
Definitions
1. Species: a group of organisms that can interbreed and produce fertile offspring
2. Population: a group of organisms of the same species living in the same area at the same time, which are capable of interbreeding.
3. Ecosystem(s): is a community of interdependent organisms and the physical environment that thet inhabit.
4. Habitat: this refers to the environment in which a species normally lives.
5. Niche: an ecological niche is best be described as where, when and how and organism lives. An organism's niche depends not only on its habitat, but what it does.
6. Community: a group of populations living and interacting with each other in a common habitat.

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ESS TOPIC 2 - THE ECOSYSTEM

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