1 / 13
Télécharger la présentation

Ecosystems

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ecosystems Výukový materiál EK 01 - 16 Tvůrce: Ing. Marie Jiráková Tvůrce anglické verze: Mgr. Milan Smejkal Projekt: S anglickým jazykem do dalších předmětů Registrační číslo: CZ.1.07/1.1.36/03.0005 Tento projekt je spolufinancován ESF a SR ČR

  2. Ecosystem • Definition I. Ecosystemis a summary of living and non-living parts to form a stablesystem that occursat certain times and in certain space and includetheflowofenergy via food - chainsandfood-websandthecyclingofnutrientsbiogoechemically.

  3. Ekosystem • Definition II. Ecosystemiscreated by the community of organisms together with the abiotic environment.

  4. Ekosystems are divided • water – a pond, a rever, theseaetc. • land – a forest, a meadow, fieldsetc..

  5. Structure and function of ecosystems Thereare different abiotic conditions in various ecosystems. Biotic conditions are created by the organisms and the relationships between them. There is a different function of organisms in an ecosystem : producers, consumers, decomposers

  6. Ecosystemandlife • In everyecosystemthereis a conversionand transfer ofenergyandothersubstances. • Ecosystems are restored. • Ecosystemsevolve.

  7. ecosystem • Each ecosystem reaches a balance under certain conditions. • Thereis a disruptionof balance whenchangingabioticorbioticcomponents. • The balance of the ecosystem isoftenruinedby human activity.

  8. Ecosystemis A discretefunctional unit ofnature.

  9. Ecosystems are dividedinto : • natural constant composition of plant and animal communitiesatcertainabioticconditions • artificial man-made, additionalenergy

  10. Themainecosystems • tundra • taiga • steppe • deciduousforests • scrubbyforests • desertsandsemi-deserts • tropical deciduous forests and savannas • tropicalrainforests

  11. Changes in ecosystems • Large areas of the original natural ecosystems have been altered by human activities.

  12. worksheets - revision • Whatisecosystem? • Give an example of human activities that negatively affects some ecosystems. • What are thebiotic conditions madeupof? • Give examples of natural and artificial ecosystems. • How the man puts his supplemental energy into the artificial ecosystem of wheat and why.?

  13. source • BRANIŠ, Martin. Základy ekologie a ochrany životního prostředí. 2. vyd. Praha: Informatorium, 1999. ISBN 80-86073-52-1. • PAPÁČEK, Miroslav a kol. Zoologie. Praha: pedagogické nakladatelství, 2000, ISBN 80-7183-203-0. • KVASNIČKOVÁ, Danuše. Základy ekologie. Praha: Scientia,spol.sr.o., 1994, ISBN 80-85827-84-0

More Related