. Critical trends assessment Program 2003-04 report. Critical Trends Assessment Project; Ecosystem management; Environmental monitoring; Natural resources surveys. Critical Trends Assessment Program 2003-2004 Report The Relationship between Forest Maturity, Forest Diversity, and Plant Distributions: Will Wildflowers Return to Disturbed Forests? Greg Spyreas, Jeffrey W. Matthews, James Ellis, Connie Carroll, and Brenda Molano-Flores Introduction Few biological measures are available that clearly and concisely compare habitats and their plant communities with one another. For example, measures o
. Critical trends assessment Program 2003-04 report. Critical Trends Assessment Project; Ecosystem management; Environmental monitoring; Natural resources surveys. Critical Trends Assessment Program 2003-2004 Report The Relationship between Forest Maturity, Forest Diversity, and Plant Distributions: Will Wildflowers Return to Disturbed Forests? Greg Spyreas, Jeffrey W. Matthews, James Ellis, Connie Carroll, and Brenda Molano-Flores Introduction Few biological measures are available that clearly and concisely compare habitats and their plant communities with one another. For example, measures of species diversity like species richness or species abundance, say nothing about which species are present or absent (species composition). It is often species composition that is of most concern for forest conservation in Illinois. One species composition measure that has been useful in studying habitats is termed "nestedness". Nestedness has been used to measure patterns of species presence or absence on different islands, to determine whether their distribution follows a pattern. If the species distribution on a group of islands is nested, the most nested species are only present on very species diverse islands and they are present nowhere else. Less nested species will be present on all islands (widespread, abundant, habitat generalists), or they will be distributed randomly (Figure 1) (Patterson 1987). If species distributions are not nested, it can be assumed that most or all of the species occur randomly, and they are not affected by island size or diversity. In Illinois, many patches of forest in a sea of human habitat that is inhospitable to forest plants are functionally "islands" of habitat ( they are surrounded by row crops or urban land).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the
Size: 1644px × 1520px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorillinoisnaturalhistorysurveydivision, bookcollectionb
