5.1 Ecosystems & Communities
Essential Biology: 5.1 Ecosystems and Communities
Energy Flows, Nutrients are Recycled:
Energy flow animation, from MHHE
Global Carbon Cycle tutorial, from Freeman
The Calcium Cycle, from Bill Duesing
Biogeochemical cycles, from Wikilabs
Here’s a neat time-lapse of flesh-eating beetles at London’s Natural History Museum doing some recycling of their own:
Energy flows… but nutrients recycle. We are made of organic molecules – nutrients. So why not truly go green?
For more on how saprotrophs such as fungi can be harnessed to solve pollutant problems, check out Paul Stamet’s talk: 6 ways mushrooms can save the world.
This content is closely linked to G2: Ecosystems and Biomes.
Here’s a nice timelapse showing the breakdown of food by bacteria, fungi and other organisms (nutrients being recyled):
Ecology is life, and life is complex relationships. Here’s an overly-brief TED Talk on how to see the simple issues in complex situations, using some nice food-web examples:
What happens at a ‘Whale Fall’?
Key terms: ecology, ecosystem, community, biotic, abiotic, species, population, heterotroph, autotroph, detritivore, saprotroph, trophic level, pyramid, energy, nutrient