Final term paper: Your final term paper will be on linkages between species and land mosaics. An emphasis of landscape dynamics, ownership, disturbance, social/economic influences, or climate change could be considered in your paper. To create an opportunity for you to exercise literature search for the most relevant publications, the instructor will NOT provide you with a list of papers in PDF. Each student will need to final his/her own papers and email the paper to Dr. Jiquan Chen. These papers will be posted for the class to share. When you submit your literature, due on March 30, 2007, please also email the complete citation following a format (see above list) so that we can compare our list with consistency. Dr. Chen will compile the list and PDF files for posting at our webpage. We will follow the same requirements as the midterm paper for this paper (e.g., references, page limit, etc.). Below is a list of journals for you to consider (but not limited to):

Ecological Applications, Conservation Biology,Ecology,Landscape Ecology,Biological,Conservation,Ecosystems,Nature,Science,Journal of Ecology, Frontiers in Ecology and Environmental Science,Landscape and Urban Planning

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

HabitatConduitFilterSinkSource

Chasing the bear

Corridors

The Great Wall in N. ChinaThe Great Wall in N. China

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.ca/

Barrier orBarrier or

Conduit?Conduit?

Access or spread?

Roads in Chequamegon Roads in Chequamegon National Forest, N. WINational Forest, N. WI

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

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

Powerlines cause diseases Powerlines cause diseases through Static Electricitythrough Static Electricity

New science reveals, not radiation, New science reveals, not radiation, but static electricity produced by but static electricity produced by powerlines interferes with the powerlines interferes with the bioelectrical life process causing bioelectrical life process causing diseases and premature aging.diseases and premature aging.

http://www.justlogiclifescience.com.au/powerlines.html

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

http://photos.innersource.com/page/45/78/160/highres

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

CheatgrassCheatgrass not only not only changes the fire frequency changes the fire frequency of a site, but also the fire of a site, but also the fire volatility, intensity and the volatility, intensity and the extent that an area is likely extent that an area is likely to burn in the future. 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

Merriam & Saunders (1993)Merriam & Saunders (1993)

H1: Home range sizes of all three study species would be larger in patches with a corridor than in patches w/o a corridor.

H2: Habitat generalists would more likely than habitat specialists to move between them.

H3: Individual movement distances would be affected by corridor presence.

Hypotheses: Very rare/difficult in landscape ecology

Cotton Mouse: Peromyscus gossypinus -- generalist

Old field mouse: Perromyscus polionotus -- specialist

Cotton rat: Sigmodon hispidus -- specialist

http://www.nsrl.ttu.edu/tmot1/sigmhisp.htm

Generalist

Specialists

H1: 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

H2: Habitat generalists would more likely than habitat specialists to move between them. true

H3: Individual movement distances would be affected by corridor presence. not supported

Hypotheses: results