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# of Area Sensitive Species:
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Area sensitive species (AS) are those species that show different levels of tolerance to habitat fragmentation. These species can be classified as "high," "moderate," or "none."
Number of AS species per habitat
Forest = 58 total (high = 22, moderate = 23, and none = 13)
Grassland = 16 total (high = 7, moderate = 4, and none = 5)
In this section we only report high and moderate AS
Classifications of these species as AD is based on Herkert (1993) and Freemark and Collins (1992) grassland and forest bird species.
Herkert, J.R., R.E. Szafoni, V.M. Kleen, and J.E. Schwegman. 1993. Habitat establishment, enhancement and management for forest and grassland birds in Illinois. Division of Natural Heritage, Illinois Department of Conservation, Natural Heritage Technical Publication #1, Springfield, Illinois. 20pp.
Freemark, K. and B. Collins. 1992. Landscape ecology of birds breeding in temperate forest fragments. Pp. 443-454 in J.M. Hagan and D.W. Johnson, eds., Ecology and Conservation of Neotropical Migrant Landbirds. Smithsonian Institution Press, Washington, D.C. 609 pp.
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# of Area Sensitive Species (high):
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Species with a high area-sensitivity are those to be the most influenced by habitat fragmentation.
Number of high AS species per habitat
Forest = 22
Grassland = 7
Classifications of these species as AD is based on Herkert (1993) and Freemark and Collins (1992) grassland and forest bird species.
Herkert, J.R., R.E. Szafoni, V.M. Kleen, and J.E. Schwegman. 1993. Habitat establishment, enhancement and management for forest and grassland birds in Illinois. Division of Natural Heritage, Illinois Department of Conservation, Natural Heritage Technical Publication #1, Springfield, Illinois. 20pp.
Freemark, K. and B. Collins. 1992. Landscape ecology of birds breeding in temperate forest fragments. Pp. 443-454 in J.M. Hagan and D.W. Johnson, eds., Ecology and Conservation of Neotropical Migrant Landbirds. Smithsonian Institution Press, Washington, D.C. 609 pp.
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# of Area Sensitive Species (moderate):
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Species with a moderate area-sensitivity show an intermediate response to habitat fragmentation.
Number of moderate AS species per habitat
Forest = 23
Grassland = 4
Classifications of these species as AD is based on Herkert (1993) and Freemark and Collins (1992) grassland and forest bird species.
Herkert, J.R., R.E. Szafoni, V.M. Kleen, and J.E. Schwegman. 1993. Habitat establishment, enhancement and management for forest and grassland birds in Illinois. Division of Natural Heritage, Illinois Department of Conservation, Natural Heritage Technical Publication #1, Springfield, Illinois. 20pp.
Freemark, K. and B. Collins. 1992. Landscape ecology of birds breeding in temperate forest fragments. Pp. 443-454 in J.M. Hagan and D.W. Johnson, eds., Ecology and Conservation of Neotropical Migrant Landbirds. Smithsonian Institution Press, Washington, D.C. 609 pp.
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# of Census Points:
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Number of 10 minutes point counts done at a site.
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# of Habitat Dependent Species:
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Habitat dependent species (HD) are those that can only be found in that particular habitat.
Number of HD per habitat
Forest = 63
Grassland = 21
Wetland = 49
Classifications of these species as HD is based on Herkert (1993) and Freemark and Collins (1992) grassland and forest bird species. Wetland Dependent Species (WDS) follow Paine (1997), with additional WDS added by the CTAP ornotologists.
Herkert, J.R., R.E. Szafoni, V.M. Kleen, and J.E. Schwegman. 1993. Habitat establishment, enhancement and management for forest and grassland birds in Illinois. Division of Natural Heritage, Illinois Department of Conservation, Natural Heritage Technical Publication #1, Springfield, Illinois. 20pp.
Freemark, K. and B. Collins. 1992. Landscape ecology of birds breeding in temperate forest fragments. Pp. 443-454 in J.M. Hagan and D.W. Johnson, eds., Ecology and Conservation of Neotropical Migrant Landbirds. Smithsonian Institution Press, Washington, D.C. 609 pp.
Paine, C.R. 1997. Abundance and nesting productivity of wetland-dependent birds in northeastern Illinois. Final Project Report to the U.S. Fish & Wildlife Service. 78pp.
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# of Non Area Sensitive Species:
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Species with a no area-sensitivity show the least influenced by habitat fragmentation.
Number of no AS species per habitat
Forest = 13
Grassland = 5
For a species list and additional information see:
Herkert, James R., Robert E Szafoni, Vernon M. Kleen, and John E. Schwegman. 1993. Habitat establishment, enhancement and management for forest and grassland birds in Illinois. Division of Natural Heritage, Illinois Department of Conservation, Natural Heritage Technical Publication #1, Springfield, Illinois. 20pp.
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# of T&E (Federal):
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Total number of federally threatened and endangered species.
Federally threatened species = 1
Federally endangered species = 8
Total federally threatened and endangered species = 9
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# of T&E (State):
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Total number of state threatened and endangered species.
State threatened species = 8
State endangered species = 26
Total state threatened and endangered species = 34
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# of T&E (Total):
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Total number of threatened and endangered species, both state and federal.
State and federally threatened species = 9
State and federally endangered species = 34
Total state threatened and endangered species = 43
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All Strata FQI:
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Floristic Quality Index (FQI) value for all the plants sampled in herb layer, shrub layer, and tree layer at a site.
The Floristic Quality Assessment is a method to assess floristic integrity. Each taxon in Illinois is assigned an integer from 0-10 termed the coefficient of conservatism (CC). CC reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
FQI = meanCC * square root of N
N is the total number of plant taxa sampled.
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All Strata FQI Native spp:
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Floristic Quality Index (FQI) value for native plants sampled in herb layer, shrub layer, and tree layer at a site.
The Floristic Quality Assessment is a method to assess floristic integrity. Each taxon in Illinois is assigned an integer from 0-10 termed the coefficient of conservatism (CC). CC reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
FQI = meanCC * square root of N
N is the total number of plant taxa sampled.
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All Strata Introduced spp:
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The total number of non-native plant species sampled in the herbaceous layer, shrub layer, and tree layer at a site.
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All Strata Mean CC:
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The coefficient of conservativism (CC) summed and averaged for the all the plants sampled in the herbaceous layer, shrub layer, and tree layer at a site.
CC is a value 0-10 assigned to each plant in the Illinois flora that reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
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All Strata Mean Native CC:
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The coefficient of conservativism (CC) summed and averaged for the all the native plants sampled at a site.
CC is a value 0-10 assigned to each plant in the Illinois flora that reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
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All Strata Native spp:
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The total number of native plant species sampled in the herbaceous layer, shrub layer, and tree layer at a site.
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All Strata Sensitive spp:
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The total number of sensitive plant species sampled in the herbaceous layer, shrub layer, and tree layer at a site. Sensitive species have a coefficient of conservatism (CC) value of 7, 8, 9, or 10.
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All Strata TE spp:
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The total number of state and federally threatened or endangered plant species sampled in the herbaceous layer, shrub layer, and tree layer at a site.
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All Strata Total spp:
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The total number of plant species sampled in the herbaceous layer, shrub layer, and tree layer at a site. (=Species Richness)
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ALLQUAL:
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Tentative quality designation based on the value of a composite percentile score "Overall" such that Overall =90 = Excellent, 75-89 = Good, 50-74 = Fair, 30 to 49 = Poor, <30 = Very Poor.
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CHANNEL:
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Stream channelized, yes or no. If yes, the stream had been straightened. If no, the stream had a meandering course. At this point no effort has been made to differentiate old from new channelization.
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CONDUCT:
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Conductivity, an indirect measure of dissolved ionic compounds in water. Urbanization (sewage, roadway runoff, etc.) elevates this above background (usually no greater than 650 uS/cm). Some values may be <100 in extreme southern Illinois.
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County:
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County the site is in. There are 102 Illinois counties.
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Cowbird:
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Brown-headed Cowbird is a nest parasite or brood parasite. For each site, Cowbird presence or absence has been denoted.
For additional information see:
Herkert, James R., Robert E Szafoni, Vernon M. Kleen, and John E. Schwegman. 1993. Habitat establishment, enhancement and management for forest and grassland birds in Illinois. Division of Natural Heritage, Illinois Department of Conservation, Natural Heritage Technical Publication #1, Springfield, Illinois. 20pp.
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DO2:
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Dissolved oxygen concentration in stream water expressed in mg/l. This is a single measure and not intended to be a comprehensive over large time frames.
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DOMCOUNT:
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Abundance of dominant taxon.
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Dominant Area Sensitive Species:
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Area sensitive species with the greatest number of individuals per site. This is based on low, moderate, and high.
See # of area sensitive species for details.
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Dominant Area Sensitive Species (high):
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High area-sensitivity species with the greatest number of individuals per site.
See # of area sensitive species (high) for details.
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Dominant Area Sensitive Species (moderate):
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Moderate area-sensitivity species with the greatest number of individuals per site.
See # of area sensitive species (moderate) for details.
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Dominant Habitat Dependent Species:
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Habitat dependent species with the greatest number of individuals.
See # of Habitat Dependent Species for a detailed description.
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Dominant Species:
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Species with the greatest number of individuals per site.
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DOMPERC:
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Percentage abundance of the dominant taxon.
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DOMTAXON:
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Single most dominant taxon.
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E:
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Number of taxa (different kinds) of Ephemeroptera, or mayflies. These are aquatic insects.
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EPA Basin:
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Environmental Protection Agency designation of Illinois basins (land around rivers or lakes from which water and streams run down into it). Illinois has (number).
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EPA___CATALOG:
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Numerical code for Illinois EPA basins.
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EPA___SUB_CATALOGUE_UNIT:
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Numerical code for Illinois EPA subbasins.
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EPA___WSID:
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Illinois EPA alphanumeric watershed identification code.
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EPA_Creek_Name:
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Illinois EPA designated small drainage name.
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EPA_SUB_BASIN:
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Illinois EPA subbasins, of which there are 33.
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EPT:
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Number of taxa (different kinds) of the aquatic insects Ephemeroptera, Plecoptera, and Trichoptera from all samples taken at a site.
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EPTPERC:
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Site-date visit percentile rank for EPT richness based on statewide data.
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EPTQUAL:
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Site-date visit tentative quality rating based on EPTPERC such that values =90 = Excellent, 75-89 = Good, 50-74 = Fair, 30 to 49 = Poor, <30 = Very Poor.
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EPTTOTL:
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Abundance of all EPT for a site/date visit.
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Habitat:
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A cumulative habitat quality score consisting of 12 measures of in-stream and riparian habitat characteristics. Scale ranges from 0-180.
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Habitat:
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Dominant characteristic of area of the site.
F = Forest
G = Grassland
W = Wetland
Please see protocols for habitat parameters.
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HABPERC:
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Site-date visit percentile rank for habitat quality based on statewide data.
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HABQUAL:
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Site-date visit tentative quality rating based on HABPERC such that values =130 = Excellent, 116-129 =Good, 93-115 = Fair, 74 to 92 = Poor, <73 indicates Very Poor habitat quality.
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HBI:
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Hilsenhoff Biotic Index. An abundance-weight average of all species pollution tolerance. This was developed in Wisconsin for use in detecting organic pollution (as from sewage treatment plants or livestock pasturing and feedlots). Most EPT taxa in Illinois have a tolerance value assigned by Hilsenhoff, those without were dropped from the calculation. Using only EPT taxa, the scale runs from 0 to 9 (Hilsenhoff provided values to 10 for some non-EPT taxa), with 9 indicating heavy organic pollution and low scores indicating a community of sensitive taxa.
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HBIPERC2:
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Site quality rating based on HBI scores. Due to higher values of HBI values indicating poorer conditions, this is calculated as 1-%tile ranking in statewide data.
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HBIQUAL:
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Site-date visit tentative quality rating based on HBIPERC2. Values <4.00 = Excellent, 4.63 to 4.00 = Good, 5.19 to 4.64 = Fair, 5.78 to 5.20 = Poor, and >5.78=Very Poor.
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HBITOTL:
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Number of specimens used in HBI calculation.
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House Congress District:
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House Congressional Districts as they occurred in 2002.
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HUC8:
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USGS basin 8-digit code resulting from a concatination of codes for EPA catalogue and sub catalogue units.
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IDNR Management Region:
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The IDNR has broken the state into five management regions. For an example of the map, go to http://dnr.state.il.us/lands/landmgt/PARKS/ilstate.htm.
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IEPA Basin:
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Environmental Protection Agency designation of Illinois basins (land around rivers or lakes from which water and streams run down into it). Illinois has (number).
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INAI Community:
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Illinois Natural Areas Inventory community type.
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ISIS_WaterShed:
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Illinois Streams Information System consisting of 10 interior drainages. Basins sometimes have small watersheds that naturally drain to other adjacent basins, in this respect they are unnatural drainages. This is a management scheme producing similarly sized basins that aid in data analysis.
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Land_Survey_Principle_Meridian:
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Integers valued 2-4, indicating a north-south band of area. Value increases from east to west.
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Land_Survey_Range:
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Within a principle meridian and township combination (often 36 sq. mi) it tracks position east and west.
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Land_Survey_Section:
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Usually one of 36 1 sq. mi parcels in a township.
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Land_Survey_Township:
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Within a principle meridian and township combination (often 36 sq. mi) it tracks position north and south.
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Landowner Type:
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Private or public ownership.
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Latitude:
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A spherical, three-dimensional coordinate system where the lines are parallel, run east and west around the Earth's surface and measure distances north and south from the Equator.
This number is for the center point or zero point of the site.
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Longitude:
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A three dimensional sperical coordinate system in which the lines run north and south around the Earth's surface, intersect at the poles and measure distance east and west from the Prime Meridian.
This number is for the center point or zero point of the site.
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MAJOR_DRAINAGE:
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One of three major drainage basins in Illinois, including the Mississippi, Illinois, and Ohio rivers.
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Natural Division:
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A total of 14 regionalizations or Natural Divisions are recognized in Illinois. These Natural Divisions identify regions of common ecological composition and setting (i.e., physiography and natural vegetation). This classification is based on Schwegman, 1973.
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OVERALL:
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Overall percentile score for a site-date visit, calculated as follows: Overall = (EPTPERC *0.4)+(HBIPERC2*0.2)+ (HABPERC*0.4). HBIPERC2 was weighted as being less important because HBI was deemed as not being as sensitive to environmental degration as EPT richness and habitat quality.
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P:
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Number of taxa (different kinds) of Plecoptera, or stoneflies. These are aquatic insects.
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Partnership:
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IDNR Ecosystems Division, Conservation 2000 Program sponsored Ecosystem Partnerships. These partnerships are coalitions of local stakeholders--private landowners, businesses, scientists, environmental organizations, recreational enthusiasts, and policy makers. They are united by a common interest in the natural resources of their area's watershed. Currently, there are 39 Ecosystem Partnerships covering roughly 80% of the state’s land area. These help to regionalize data for partnership use.
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PARTNERSHIP_NAME_2:
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Larger partnership entities that subsume smaller ones to form common objectives and plans. To date, this is the Chicago Wilderness only.
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Patch Size (hectares):
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This is the area where point counts were collected. Patch size is given in hectares. To convert hectares into acres multiply the value given by 2.47
Example:
Site 088004F
Patch Size = 27.6 hectares
Patch Size in acres = 27.6 * 2.47 = 68.172 acres
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PERFINES:
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Percentage of stream bottom covered by fine sediments (sand, silt, and clay). Higher values usually indicate degradation.
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pH:
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Concentration of hydrogen ions in stream water expressed as pH units (ranges 0-14, <7 acidic, >7 basic). This is a single measure and not intended to be comprehensive over large time frames.
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Quadrats Avg Nativespp per quad:
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The average number native species found per quadrat.
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Quadrats Avg spp per quad:
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The average number of species found per quadrat.
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Quadrats Comprehensive mt2 per ha:
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The total cover of plants sampled in the herbaceous layer at each site based on a comprehensive cover estimate recorded for each quadrat. The units are meter squared per hectare.
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Quadrats FQI:
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Floristic Quality Index (FQI) value for native plants sampled in the herb layer at a site.
The Floristic Quality Assessment is a method to assess floristic integrity. Each taxon in Illinois is assigned an integer from 0-10 termed the coefficient of conservatism (CC). CC reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
FQI = meanCC * square root of N
N is the total number of plant taxa sampled.
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Quadrats FQI Native spp:
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Floristic Quality Index (FQI) value for native plants sampled in herb layer, shrub layer, and tree layer at a site.
The Floristic Quality Assessment is a method to assess floristic integrity. Each taxon in Illinois is assigned an integer from 0-10 termed the coefficient of conservatism (CC). CC reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
FQI = meanCC * square root of N
N is the total number of plant taxa sampled.
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Quadrats Introduced spp:
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The total number of species found from the quadrat surveys (herbaceous layer) that are not native to Illinois.
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Quadrats Mean CC:
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The coefficient of conservativism (CC) summed and averaged for the all the plants sampled in the herbaceous layer at a site.
CC is an integer 0-10 assigned to each plant in the Illinois flora that reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
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Quadrats Mean Native CC:
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The coefficient of conservativism (CC) summed and averaged for the all the native plants sampled in the herbaceous layer at a site.
CC is a value 0-10 assigned to each plant in the Illinois flora that reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
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Quadrats Native spp:
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The total number of species found from the quadrat surveys (herbaceous layer) that are native to Illinois.
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Quadrats Rel mt2 ha Introduced:
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The relative proportion (percent) of non-native species compared to native species sampled in the herbaceous layer at a site.
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Quadrats Rel mt2 ha Native:
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The relative proportion (percent) of native species compared to non-native species sampled in the herbaceous layer at a site.
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Quadrats Sensitive spp:
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The total number of species found from the quadrat surveys (herbaceous layer) that are defined as sensitive. Sensitive species have a coefficient of conservatism (CC) value of 7, 8, 9, or 10.
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Quadrats Shannon rel mt2:
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The Shannon diversity index for a site based on plants sampled in the herb layer. Species diversity is a measure of species evenness and species richness. The Shannon index is calculated using the total number of species sampled and the proportion of that species sampled at a site. The proportion is based on relative cover.
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Quadrats TE spp:
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The total number of species found from the quadrat surveys (herbaceous layer) that are state or federally threatened or endangered.
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Quadrats Total spp:
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The total number of species found in the quadrat surveys (herb layer sampling). Please see our protocols for further details.
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Quadrats Total summed mt2 per ha:
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The total cover of vegetation per hectare.
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Resource Rich Area Name:
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IDNR designated areas of high concentration of forested area, wetlands, Illinois Natural Areas, and presence of Biologically Significant Streams.
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Resource_Rich:
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Integer for IDNR Resource Rich Areas.
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Senate Congress District:
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Senate Congressional Districts as they occurred in 2002.
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Shrubs Saplings DENSTY1M:
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The density of sapling, shrub and vine species under 5 cm diameter at breast height (DBH) and over 1 meter in height sampled in the shrub layer. The density is expressed as number of stems per hectare.
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Shrubs Saplings FQI:
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Floristic Quality Index (FQI) value for all the sapling, shrub and vine species (woody plants) under 5 cm diameter at breast height (DBH) and over 1 meter in height sampled in the shrub layer.
The Floristic Quality Assessment is a method to assess floristic integrity. Each taxon in Illinois is assigned an integer from 0-10 termed the coefficient of conservatism (CC). CC reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
FQI = meanCC * square root of N
N is the total number of plant taxa sampled.
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Shrubs Saplings FQI Native spp:
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Floristic Quality Index (FQI) value for native sapling, shrub and vine species (woody plants) under 5 cm diameter at breast height (DBH) and over 1 meter in height sampled in the shrub layer.
The Floristic Quality Assessment is a method to assess floristic integrity. Each taxon in Illinois is assigned an integer from 0-10 termed the coefficient of conservatism (CC). CC reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
FQI = meanCC * square root of N
N is the total number of plant taxa sampled.
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Shrubs Saplings Introduced spp:
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The total number of sapling, shrub and vine species (woody plants) under 5 cm diameter at breast height (DBH) and over 1 meter in height sampled in the shrub layer that are not native to Illinois.
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Shrubs Saplings Mean CC:
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The coefficient of conservativism (CC) summed and averaged for the all the plants sampled in the shrub layer at a site.
CC is a value 0-10 assigned to each plant in the Illinois flora that reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
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Shrubs Saplings Mean Native CC:
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The coefficient of conservativism (CC) summed and averaged for the all the native plants sampled in the shrub layer at a site.
CC is a value 0-10 assigned to each plant in the Illinois flora that reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
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Shrubs Saplings Native spp:
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The total number of sapling, shrub and vine species (woody plants) under 5 cm diameter at breast height (DBH) and over 1 meter in height sampled in the shrub layer native to Illinois.
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Shrubs Saplings RELDN1MI:
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The relative density of non-native sapling, shrub and vine species under 5 cm diameter at breast height (DBH) and over 1 meter in height sampled in the shrub layer compared to native species. The relative density is expressed as a percent.
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Shrubs Saplings RELDN1MN:
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The relative density of native sapling, shrub and vine species under 5 cm diameter at breast height (DBH) and over 1 meter in height sampled in the shrub layer compared to non-native species. The relative density is expressed as a percent.
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Shrubs Saplings Sensitive spp:
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The total number of sapling, shrub and vine species (woody plants) under 5 cm diameter at breast height (DBH) and over 1 meter in height sampled in the shrub layer with an assigned coefficient of conservatism (CC) value of 7, 8, 9, or 10.
CC is an integer 0-10 assigned to each plant in the Illinois flora that reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
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Shrubs Saplings SHANSHD1:
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The Shannon diversity index for a site based on plants sampled in the shrub layer. Species diversity is a measure of species evenness and species richness. The Shannon index is calculated using the total number of species sampled and the proportion of that species sampled at a site. The proportion is based on relative density.
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Shrubs Saplings TE spp:
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The total number of sapling, shrub and vine species (woody plants) under 5 cm diameter at breast height (DBH) and over 1 meter in height sampled in the shrub layer that are state or federally threatened or endangered in Illinois.
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Shrubs Saplings Total spp:
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The total number of sapling, shrub and vine species under 5 cm diameter at breast height (DBH) and over 1 meter in height sampled in the shrub layer.
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Site Status:
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P - Primary sites, these sites are visited by both botanists and ornithologists. Primary sites are randomly selected.
R - Reference sites, these are only wetland sites considered to be high quality. These sites are not randomly selected.
A - Additional sites, if the primary grassland site is less than 10 acers, then ornithologists will visit another grassland greater than 10 acers. These grassland sites are also randomly selected.
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Site Status:
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RANDOM signifies a randomly chosen site, REFERENCE signifies a least-impacted or reference site. To date, the latter exist for the Northeastern Morainal Natural Division/ Chicago Wilderness streams only.
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SiteID:
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7 Character code consisting of 4 digit township identifier, two digit stream segment identifier, and a single letter code "S" signifying this to be a stream sample (as opposed to forests, wetlands, grasslands).
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SiteID:
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Unique identification code for each site. 7 Character code consisting of 4 digit township identifier, two digit random location of site within township identifier, and a single letter code "F", "G", or "W" signifying this to be a forest, grassland or wetland sample (as opposed to streams).
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Species Richness:
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Total number of species in a site.
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State1/3:
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To facilitate regional comparisons, because of north to south climatological and geological differences, the state has been roughly divided into thirds (north, central, and south, see map).
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STREAM:
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Short name for stream sampled. Creek should be substituted at the end of each name not succeeded by "R" for river, "SL" for slough, "BR" for branch, "DI" for ditch, or "RUN" for run.
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T:
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Number of taxa (different kinds) of Trichoptera, or caddisflies. These are aquatic insects.
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TEMP:
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Water temperature in Celsius. This is a single measure and not intended to be a comprehensive over large time frames.
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Trees Avg DBH:
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The average Diameter at Breast Height (DBH) of all the trees over 5 cm DBH in the tree surveys.
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Trees Basal Area per ha:
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The basal area of all trees DBH >5cm per hectare in meters squared from the tree surveys.
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Trees Density:
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Number of trees with Diameter at Breast Height (DBH) greater than 5cm per hectare.
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Trees FQI:
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The mean Floristic Quality Index value (FQI) for all the tree and vine species over 5 cm diameter at breast height (DBH) found from the tree surveys.
The FQI of a site is calculated by multiplying the mean CC by the square root of the total number of native species there. The lower the value, the more degraded the site is generally considered to be.
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Trees FQI Native spp:
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The mean Floristic Quality Index value (FQI) for all the native tree and vine species over 5 cm diameter at breast height (DBH) found from the tree surveys.
The FQI of a site is calculated by multiplying the mean CC by the square root of the total number of native species there. The lower the value, the more degraded the site is generally considered to be.
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Trees Introduced spp:
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The total number of tree and vine species over 5 cm diameter at breast height (DBH) sampled in the tree layer at a site that are not native to Illinois.
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Trees Mean CC:
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The mean Coefficient of Conservatism (CC) for all the tree and vine species over 5 cm diameter at breast height (DBH) found from the tree surveys.
CC is "a subjective rating that describes the species' affinity for undisturbed natural areas" (Matthews, 2003).
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Trees Mean Native CC:
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The mean Coefficient of Conservatism (CC) for all the native tree and vine species over 5 cm diameter at breast height (DBH) found from the tree surveys.
CC is "a subjective rating that describes the species' affinity for undisturbed natural areas" (Matthews, 2003).
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Trees Native spp:
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The total number of tree and vine species over 5 cm diameter at breast height (DBH) sampled in the tree layer at a site that are native to Illinois.
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Trees Rel BA Introduced:
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The percent of the basal area of all trees DBH >5cm per hectare in meters squared from the tree surveys that are introduced or non-native to Illinois.
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Trees Rel BA Native:
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The percent of the basal area of all trees DBH >5cm per hectare in meters squared from the tree surveys that are native to Illinois.
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Trees Rel Dens Introduced:
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Density of introduced or non-native tree species (DBH > 5cm) as a percent.
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Trees Rel Dens Native:
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Density of native tree species (DBH > 5cm) as a percent.
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Trees Sensitive spp:
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The total number of tree and vine species over 5 cm diameter at breast height (DBH) sampled in the tree layer at a site that have a coefficient of conservatism value of 7, 8, 9, or 10.
CC is a value 0-10 assigned to each plant in the Illinois flora that reflects the plant's tolerance to disturbance, as well as varying degrees of fidelity to specific habitat integrity.
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Trees Shannon relba:
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This is the Shannon diversity index for the tree canopy layer calculated using the relative basal area of each tree species at the site.
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Trees Shannon reldens:
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This is the Shannon diversity index for the tree canopy layer calculated using the relative density of each tree species at the site.
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Trees TE spp:
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The total number of trees and vine species over 5 cm diameter at breast height (DBH) found from the tree surveys that are threatened or endangered in Illinois.
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Trees Total spp:
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The total number of tree and vine species over 5 cm diameter at breast height (DBH) sampled in the tree layer at a site.
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WIDECODE:
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A width code for the stream. Larger streams have higher numbers.
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Year:
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Year of site visitation.
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