1. What are corridors?  Corridors are linear patches or narrow strips -- a special kind of patches.  Examples: roads, railroads, streams/rivers, power lines, sewer lines, trails, hedge rows/windbreaks, etc. Structure  Width, Length, Height, Shape, Contrast, Connectivity, Spatial Configuration  Corridors are dynamic  Corridors can be visually classified by types: trough corridors, wooded strips, and stream/river corridors Function  Habitat  Conduit  Filter  Sink  Source Chasing the bear

2. The Great Wall in N. China

3. TUC use may occur on, above or below the corridor land surface. Above- ground utilities (powerlines) and underground utilities (pipelines) both have designated alignments that provide for access maintenance, landscaping, etc. http://tuc.gov.ab.c a/

4. Barrier or Conduit?

5. Access or spread?

6. Roads in Chequamegon National Forest, N. WI

9. http://www.unl.edu/nac/windbreaks.html

10. http://www.gcnursery.co.uk/windbreak.html

12. Powerlines cause diseases through Static Electricity New science reveals, not radiation, but static electricity produced by powerlines interferes with the bioelectrical life process causing diseases and premature aging. http://www.justlogiclifescience.com.au/powerlines.html

13. http://photos.innersource.com/page/45/31

15. http://www.rr-fallenflags.org/aft/aft.html Cheatgrass was brought from Eurasia to Washington State in the 1890s. In 30 years it basically took over the W http://www.enn.com/enn-news-archive/1999/08/081399/cheatgrass_5005.asp

16. Cheatgrass not only changes the fire frequency of a site, but also the fire volatility, intensity and the extent that an area is likely to burn in the future. The combination of fires, and low nitrogen content soil may drive out the native plants. But the cheatgrass seems to thrive under these conditions. http://www.enn.com/enn-news-archive/1999/08/081399/cheatgrass_5005.asp

18. Merriam & Saunders (1993)

21. H 1 : Home range sizes of all three study species would be larger in patches with a corridor than in patches w/o a corridor. H 2 : Habitat generalists would more likely than habitat specialists to move between them. H 3 : Individual movement distances would be affected by corridor presence. Hypotheses : Very rare/difficult in landscape ecology

22. Cotton Mouse: Peromyscus gossypinus -- generalist Old field mouse: Perromyscus polionotus -- specialist Cotton rat: Sigmodon hispidus -- specialist http://www.nsrl.ttu.edu/tmot1/sigmhisp.htm

23. Generalist Specialists

25. H 1 : Home range sizes of all three study species would be larger in patches with a corridor than in patches w/o a corridor.  not true H 2 : Habitat generalists would more likely than habitat specialists to move between them.  true H 3 : Individual movement distances would be affected by corridor presence.  not supported Hypotheses : results