Aim: How do ecosystems change over time?Como cambian los ecosistemas a lo largo del tiempo?

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Transcripción de la presentación:

Aim: How do ecosystems change over time?Como cambian los ecosistemas a lo largo del tiempo?

Are forest fires an ecosystems worst nightmare? Why or why not? Son los fuegos en ua foresta beneficiales o daninos? Por que?

Ecological Succession/ Sucesion Ecologica The process by which an ecosystem changes over time – often from a barren piece of land to a complex ecological community.. Proceso mediante el cual un ecosistema cambia a lo largo del tiempo. Cambio de un ambiente arido a un ambiente con una comunidad ecologica compleja.

Ecological Succession In a Forest Sucesion Ecologica en un bosque o foresta As time passes grasses grow & then get replaced by shrubs and eventually a forest will form. Al pasar el tiempo crece la llerva y eventualmente un bosque se formara. Why do the grasses disappear? Porque desaparece la llerva? The large shrubs and trees prevent light from reaching the grasses. Porque los otros arboles bloquean la luz solar.

Ecological Succession in Ponds & Lakes: Sucesion Ecologica en lagos y estanques: As time progresses, the pond gets filled in with dead organic matter. The dead organic matter takes the place of the water in the pond or lake. Al pasar del tiempo, el lago se llena de materia organica muerta, le que entonces ocupa el espacio del agua. Eventually a forest forms where the pond once was. Eventualmente un bosque se forma donde estaba el lago.

What is the final state of ecological succession Cual es el estado final de la sucesion ecologica? A climax community with great biodiversity (Una comunidad de climax con gran biodiversidad).

Destruction of Climax Communities Destruccion de comunidades de climax Fires, volcanic eruptions, tsunamis, deforestation, acid rain. (fuego, erupciones, deforestacion,etc) Their destruction often (but not always) means the birth of a NEW community via succession. (La destruccion a veces resulta en comunidades nuevas mediante la sucesion ecologica)