. Critical Trends Assessment Program : 2001 report. Ecosystem management; Environmental monitoring; Natural resources surveys. to be the Little Wabash, the La Moine, and the Sangamon, while the worst basins were the Kankakee/ Vermilion N/ Mackinaw and the Kaskaskia. The latter have most of their land use in row crop agriculture and streams have been channelized and cleared of trees. I â a s a â ** 5 1 X 140 120- 100-. Fig. 1. Mean and standard error of habitat quality scores for CTAP streams. Abbreviations not obvious above are E-V = Embarras/Vermilion S, SANG = Sangamon, LAM = La Moine, LWAB
. Critical Trends Assessment Program : 2001 report. Ecosystem management; Environmental monitoring; Natural resources surveys. to be the Little Wabash, the La Moine, and the Sangamon, while the worst basins were the Kankakee/ Vermilion N/ Mackinaw and the Kaskaskia. The latter have most of their land use in row crop agriculture and streams have been channelized and cleared of trees. I â a s a â ** 5 1 X 140 120- 100-. Fig. 1. Mean and standard error of habitat quality scores for CTAP streams. Abbreviations not obvious above are E-V = Embarras/Vermilion S, SANG = Sangamon, LAM = La Moine, LWAB = Little Wabash, M-S-C = Big Muddy/ Saline/Cache, K-V-M = Kankakee/Vermilion N/Mackinaw, KASK = Kaskaskia. Number in bars indicate sample size. EPT species richness averaged across the state, indicating relatively poor to fair species diversity (Fig. 2). The INHS has ample historical data to indicate that values were higher in the early part of the century. It appears that modem stream conditions favor those species that have egg, nymphal, or pupal diapause - life history traits that minimize exposure to high summer temperatures, low dissolved oxygen, and stream intermittency. Those without such traits lose out in natural selection. This includes those species that have multiple year cycles; hence, species of large predatory stoneflies have experienced drastic range losses across the state. Again, highly agricultural basins seem to be the most heavily 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 original Illinois. Dept. of Natural Resources; Illinois. Office of Realty and Environmental Planning; Illinois. Natural History Survey Division; Critical Trends Assessment Project. Springfield, Ill. : Illinois Dept. of Natural Resources
Size: 1832px × 1363px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorillinoisnaturalhistorysurveydivision, bookcollectionb
