1 / 17

Extinction’s New Face:

Extinction’s New Face:. Habitat Loss & Fragmentation. What is the evidence of habitat loss?. Deforestation…. Source: www.guayaki.com/index.php?p=reforestation. Deforestation…. Is it only limited to the Amazon?. How does species abundance relate to habitat size?. Make predictions

dani
Download Presentation

Extinction’s New Face:

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. Extinction’s New Face: Habitat Loss & Fragmentation

  2. What is the evidence of habitat loss? • Deforestation…

  3. Source: www.guayaki.com/index.php?p=reforestation

  4. Deforestation… • Is it only limited to the Amazon?

  5. How does species abundance relate to habitat size? • Make predictions • Is there likely to be a relationship? • Why or why not?

  6. What are the impacts of decreasing habitat size? • We call this habitat fragmentation • Are there likely to be any additional problems, beyond simple reduction in area?

  7. Over time large blocks of forest (green) are fragmented  through a variety of land use activities (after Curtis, 1956) - Cadiz Township, Wisconsin.

  8. Habitat Fragmentation & Edge Effects

  9. Mean alien species richness, summarized by transect position and aspect. Sample size = 7 for each combination of transect and aspect. Redrawn from Brothers and Spingarn 1992). (http://dnr.state.il.us/orep/inrin/ecosys/forests/forstres.htm )

  10. Mean frequency of sample transect segments containing alien species (bottom), summarized by transect position and aspect. Sample size = 7 for each combination of transect and aspect. Redrawn from Brothers and Spingarn (1992).   (http://dnr.state.il.us/orep/inrin/ecosys/forests/forstres.htm )

More Related