. Critical trends assessment Program 2003-04 report. Critical Trends Assessment Project; Ecosystem management; Environmental monitoring; Natural resources surveys. ^"^^. Fig. 5. Images of Penthimia americana (a); Apache degeerii (b); and Evacanthus nigramericana (c); Athysanus argentarius (d); Aphrodes bicincta (e); and Lebradea flavovirens (f). becomes more diverse in species and the plant architecuture becomes more complex over time, it provides more resource availability for AH colonization. Based on our 1997-2000 CTAP vegetation data (Molano-Flores et al. 2002), forests, not grassl
. Critical trends assessment Program 2003-04 report. Critical Trends Assessment Project; Ecosystem management; Environmental monitoring; Natural resources surveys. ^"^^. Fig. 5. Images of Penthimia americana (a); Apache degeerii (b); and Evacanthus nigramericana (c); Athysanus argentarius (d); Aphrodes bicincta (e); and Lebradea flavovirens (f). becomes more diverse in species and the plant architecuture becomes more complex over time, it provides more resource availability for AH colonization. Based on our 1997-2000 CTAP vegetation data (Molano-Flores et al. 2002), forests, not grasslands, should have more AH species, since the forest plant communities are more species diverse. However as previously pointed out, AH are collected too early in the forests. In addition, we may be missing AH species due to the sampling technique we employ. Because we only conduct sweeps at our sites, some AH species that occur in the canopy will be missed (see a further explanation under Terrestrial Arthropod Relationships). Other terrestrial arthropods showed different trends in species richness across habitats (Figure 1). Arachnida, Diptcra, Coleoptera, Hymenoptera, and Lepidoptera species richness were lower in wetlands than forests and grasslands. The low diversity observed in these orders in the wetland sites may be a result of lower plant diversity. Many of the CTAP wetland sites have high levels 57. 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 Energy and Natural Resources; Illinois. Natural History Survey Division; Critical Trends Assessment Project. [Illinois] : Illinois Dept. of Natural Resources, Office of Realty and Environmental Palnning : Office of Scientific Research and Analysis, Natural History Survey Division
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