Common Name (as listed by the Iowa Department of Natural Resources http://www.iowadnr.com)
Scientific Name (as listed by the Integrated Taxonomic Information System(ITIS) http://www.itis.usda.gov/)
Native: This field indicates whether the species is native to Iowa or not. Values include “yes” or “no”.
ITIS Code: This field indicates the unique numeric code assigned to a particular species used by ITIS as the Taxonomic Serial Number.
State Rank: This field indicates the state heritage rank -- a numeric rank of relative endangerment based primarily on the number of occurrences within the state according to NatureServe (http://www.natureserve.org/explorer/)
Values include:
- S1= Critically imperiled in the state because of extreme rarity or because of some factor(s) making it especially vulnerable to extirpation from the state. Typically five or fewer occurrences or very few remaining individuals.
- S2= Imperiled in the state because of rarity or because of some factor(s) making it very vulnerable to extirpation from the state. Six to 20 occurrences or few remaining individuals.
- S3= Rare and uncommon in the state. 21 to 100 occurrences.
- S4= Widespread, abundant and apparently secure in the state, with many occurrences but the species is of long-term concern. Usually more than 100 occurrences.
- S5= Demonstrably widespread, abundant and secure in the state and essentially ineradicable under present conditions.
- SH= Historical: The species occurred historically in the state (with the expectation that it may be rediscovered). Perhaps having not been verified in the last 20 years, and suspected to be still extant.
- SX= Extirpated: The species is believed to be extirpated from the state.
- S?= Inexact or Uncertain—Denotes inexact or uncertain numeric rank. (The ? qualifies the character immediately preceding it in the Srank.)
- SNR= Unranked—state/province conservation status not yet assessed.
- SNA= Not Applicable —A conservation status rank is not applicable because the species is not a suitable target for conservation activities.
National Rank: This field indicates the national heritage rank according to NatureServe.
Values include:
- N1= Critically Imperiled—Critically imperiled in the nation because of extreme rarity or because of some factor(s) making it especially vulnerable to extirpation.
- N2= Imperiled—Imperiled in the nation because of rarity or because of some factor(s) making it very vulnerable to extirpation. 3
- N3= Vulnerable—Vulnerable in the nation either because rare and uncommon, or found only in a restricted range (even if abundant at some locations), or because of other factors making it vulnerable to extirpation.
- N4= Apparently Secure—Uncommon but not rare, and usually widespread in the nation. Possible cause of long-term concern.
- N5= Secure—Common, widespread, and abundant in the nation. Essentially ineradicable under present conditions.
- NNA= Not Applicable —A conservation status rank is not applicable because the species is not a suitable target for conservation activities.regions.
- NNR= Unranked—Nation conservation status not yet assessed.
Global Rank: This field indicates the global heritage rank according to NatureServe.
Values include:
- G1= Critically imperiled because of extreme rarity or because of some factor(s) making it especially vulnerable to extinction. (Typically five or fewer occurrences or very few remaining individuals.)
- G2= Imperiled because of rarity or because of some factor(s) making it very vulnerable to extinction throughout its range. (Six to 20 occurrences or few remaining indviduals or acres.)
- G3= Vulnerable—At moderate risk of extinction due to a restricted range, relatively few populations (often 80 or fewer), recent and widespread declines, or other factors.
- G4= Apparently Secure—Uncommon but not rare; some cause for longterm concern due to declines or other factors.
- G5= Secure—Common; widespread and abundant.
Modeled By: This field indicates who created the species prediction models.
State Range: This field gives a brief description of the distribution of a species specific to Iowa. Habitat Affinities: This field gives a general description of the habitat affinities of a species.
Predictive Model(s): This field lists all prediction models created for species including one or more of the following:
Statewide Model: model predicting interior stream reaches only Possible methods of formulating model:
- Decision Tree Analysis n= indicates the number of sampled stream reaches used for analysis
- Habitat variables taken from literature
- No model- range only is indicated
Mississippi River Model: model predicting Mississippi River pools 8-21 only 4
Missouri River Model: model predicting Missouri River pools* 17-19 only
Overall Prediction Model: model combining all applicable models for a species Prediction Map: This map illustrates the range and predictive distribution, if applicable, of the species
Literature Cited: This field lists literature cited in either the state range or habitat affinities fields. Data Sources: This field lists the sources of data that were used to determine species range and to create prediction models. Additional References: This field list references that may be used for further reading on a particular species.
Photo Credits: This indicates the source and owner of the photographs and graphic images used for a species. Permission was granted for this project only. Please contact owner of material for future use.
Atlas Pages: Select species from list below.