Ecosystems characteristics

1. Unit 10:
Ecosystems

2. Index
1. What is an ecosystem?
2. The organisation of ecosystems
3. Biogeochemical cycles

3. 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

4. 1.1 The cycle of matter
(organic matter)
(inorganic matter)

5. 1.2 Energy in ecosystems
Energy enters an ecosystem and flows in one direction

6. Aphid(pulgón)
https://www.youtube.com/watch?v=0glkXIj1DgE 
energy transfer in trophic levels

7. 10% Rule

8. 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

9. 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

10. Biomass is the quantity of matter that makes up an organism, population,
trophic level or ecosystem
2.3 Ecological pyramids

11. Trophic pyramids Types of
pyramids
Energy
pyramids
Biomass
pyramids
Number
pyramids
Pyramids of energy

12. Pyramids of biomass

13. Pyramids of numbers

14. Work in your own: what type of pyramids are these?
1 2
6
5
3
4
(kg)
Energy
pyramid
Energy
pyramid
Biomass
pyramid
Biomass
pyramid
Numbers
pyramid
Numbers
pyramid

15. Goats climbing a near vertical brick dam wall to lick the stone for salt
and minerals
Dams 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.

16. 3. Biogeochemical
cycles

18. Nitrogen cycle

19. Phosphorus cycle