. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. PRAIRIES 4001 300 PzooH z 3 o (9 ? 100 QE a. JASPER COUNTY - BOGOTA AREA PHEASANTS. PRAIRIE CHICKENS "">—'—i—i—i—I—i—i—I—i—i—i—r—i—i—i— 1963 65 67 69 71 73 75 77 79 81 Figure 13. Spring counts of prairie-chickens and pheasants on the Bogota Study Area, Jasper County, Illinois, 1963-1982. Pheasants are represented by the shaded area above the prairie-chicken population (reprintedfrom Wes
. The changing Illinois environment : critical trends : technical report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. PRAIRIES 4001 300 PzooH z 3 o (9 ? 100 QE a. JASPER COUNTY - BOGOTA AREA PHEASANTS. PRAIRIE CHICKENS "">—'—i—i—i—I—i—i—I—i—i—i—r—i—i—i— 1963 65 67 69 71 73 75 77 79 81 Figure 13. Spring counts of prairie-chickens and pheasants on the Bogota Study Area, Jasper County, Illinois, 1963-1982. Pheasants are represented by the shaded area above the prairie-chicken population (reprintedfrom Westemeier 1983). Table 3. Insect species previously reported to occur in the prairie area within Illinois Beach State Park that are no longer found there (R. Panzer, personal communication). Leafhoppers Hecalus rolundus Flexamia delongi Polyamia compacta Hebecephalus signatifrons Hebecephalus cruciatus Deltocepiialus gramus Euscelis sahlbergi Limotettix parallelus Paraphlepsius alius Chlorotettix obsensus Chlorotettix rugicollis Chlorotettix brevidis Butterflies Hesperia ottoe Callophrys irus Moths Schinia Indiana Insect surveys have been conducted within a variety of humanized habitats and on 56 Illinois prairie and savanna remnants since 1982 (R. Panzer, unpublished data). The primary focus of this study has been on leafhoppers, froghoppers, butterflies, root-borer moths (Papaipema species), and flower moths (Schinia species), groups that are generally reported to include inordinately high numbers of prairie-dependent species. Grasshoppers, grouse locusts, katydids, walking sticks, stinkbugs, shieldback bugs, treehop- pers, and bumblebees, insects that are widely reported to be tolerant of habitat alteration, were also consid- ered. The primary objectives of this study were to generate estimates of conservatism for each group and to determine the status, distribution, and site size requirements of the conservative species in northern Illinois. Si
Size: 2364px × 1057px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, booksubjecte, booksubjectecology, booksubjectman
