{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Topic 16_colour

Topic 16_colour - Geography 211(Fall 2009 1 Topic 16 The...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Geography 211 (Fall 2009) 11/30/09 1 Topic 16 The Biosphere 1. Flow of Energy and Maber in Ecosystems Ecosystem: Func¡onal unit consis¡ng of all living organisms (plants, animals and micro¢es) in a given area, and all non‐living physical and chemical factors of their environment, linked through nutrient cycling and energy flow. An ecosystem can ¢e of any size (log, pond, forest) and func¡ons as a unit. Food We¢ Primary Producers: • species capa¢le of producing complex organic su¢stances (essen¡ally "food") from energy source (solar energy) and inorganic materials • ¢ase of food chain Consumers: • organisms that ingest other organisms as food source • Primary consumers require producers • Secondary consumers etc. Decomposers: • decomposers feed on decaying organic maber (e.g. microscopic organisms such as ¢acteria) Example of a food web in an Arctic ecosystem ht p:/ en.wikipedia.org/wiki/Food_chain Geography 211 (Fall 2009) 11/30/09 2 Energy Flow of Trophic Levels: • on average, only smaller % of organism's energy passed on to predator • rest used for organism's life processes or lost as heat to environment • through eating and being eaten, energy flows from one trophic level to another Photosynthesizing organisms: • use light energy from sun to make carbohydrates for their needs...
View Full Document

{[ snackBarMessage ]}

Page1 / 5

Topic 16_colour - Geography 211(Fall 2009 1 Topic 16 The...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon bookmark
Ask a homework question - tutors are online