Unit10 Ecosystems
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Transcript of Unit10 Ecosystems
Unit 10: Ecosystems
Index1. What is an ecosystem?2. The organisation of ecosystems3. Biogeochemical cycles
1. What is an ecosystem?An ecosystem
is the combined group of:
living beings COMMNUNITY
physical factors of the environment where they live
BIOTOPE
relationships between them
1.1 The cycle of matter
(organic matter)
(inorganic matter)
1.2 Energy in ecosystems
Energy enters an ecosystem and flows in one direction
Aphid(pulgón)
https://www.youtube.com/watch?v=0glkXIj1DgE energy transfer in trophic levels
10% Rule
2. The organisation of ecosystems
2.1 Trophic levels in a food chain
Organisms that obtain matter and energy in the same way are at the same trophic level
2.2 Food webs
In an ecosystem, food chains do not exist as isolated linear connections between four or five different species.
http://www.mhhe.com/biosci/genbio/virtual_labs/BL_03/BL_03.html ==> trophic levels virtual lab.Write 15 sentences describing some trophic relationships between organisms in the different biomes
Biomass is the quantity of matter that makes up an organism, population, trophic level or ecosystem
2.3 Ecological pyramids
Trophic pyramids Types of pyramids
Energy pyramids
Biomass pyramids
Number pyramids
Pyramids of energy
Pyramids of biomass
Pyramids of numbers
Work in your own: what type of pyramids are these?
1 2
65
3
4
(kg)
Energy pyramid
Energy pyramid
Biomass pyramid
Biomass pyramid
Numbers pyramid
Numbers pyramid
Goats climbing a near vertical brick dam wall to lick the stone for salt and mineralsDams are among the most daunting examples of mankind's engineering savvy, and they're also perhaps the most environmentally impactful, too -- but none of that could keep this brave herd of Ibex goats from scaling the sheer face of the Cingino-dam in Italy.It's a classic illustration of how well this species has adapted to its environment.
3. Biogeochemical cycles
Nitrogen cycle
Phosphorus cycle