unit10 ecosystems
TRANSCRIPT
![Page 1: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/1.jpg)
Unit 10: Ecosystems
![Page 2: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/2.jpg)
Index1. What is an ecosystem?2. The organisation of ecosystems3. Biogeochemical cycles
![Page 3: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/3.jpg)
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
![Page 4: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/4.jpg)
1.1 The cycle of matter
(organic matter)
(inorganic matter)
![Page 5: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/5.jpg)
1.2 Energy in ecosystems
Energy enters an ecosystem and flows in one direction
![Page 6: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/6.jpg)
Aphid(pulgón)
https://www.youtube.com/watch?v=0glkXIj1DgE energy transfer in trophic levels
![Page 7: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/7.jpg)
10% Rule
![Page 8: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/8.jpg)
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
![Page 9: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/9.jpg)
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
![Page 10: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/10.jpg)
Biomass is the quantity of matter that makes up an organism, population, trophic level or ecosystem
2.3 Ecological pyramids
![Page 11: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/11.jpg)
Trophic pyramids Types of pyramids
Energy pyramids
Biomass pyramids
Number pyramids
Pyramids of energy
![Page 12: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/12.jpg)
Pyramids of biomass
![Page 13: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/13.jpg)
Pyramids of numbers
![Page 14: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/14.jpg)
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
![Page 15: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/15.jpg)
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.
![Page 16: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/16.jpg)
3. Biogeochemical cycles
![Page 17: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/17.jpg)
![Page 18: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/18.jpg)
Nitrogen cycle
![Page 19: Unit10 Ecosystems](https://reader035.vdocuments.us/reader035/viewer/2022062306/587051ea1a28aba2118b4873/html5/thumbnails/19.jpg)
Phosphorus cycle