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RPBB HPZModel Update [U.S. Fish and Wildlife Service]

USFWS · 2025 Full Details

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Title
RPBB HPZModel Update [U.S. Fish and Wildlife Service]
Description
The Minnesota-Wisconsin USFWS Field Office has adapted a habitat connectivity model that considers the likelihood of B. affinis movement based on the most recent National Land Cover Database maps. This model allows us to assess the likelihood of bumble bee movement away from the locations of known records based on the manner in which various land uses and conditions may affect those movements. The polygons generated from the B. affinis habitat connectivity model suggest areas with the highest potential for the species to be present based on typical bumble bee foraging distances and suitable habitat. We have adapted the innermost ‘ring' around each B. affinis record, dated 2007-"current", to produce polygons that describe the area where there is highest potential for the species to be present (i.e., High Potential Zones). These zones although not of uniform size, have discrete boundaries that will be used by FWS field offices and served online via the FWS Information for Planning and Conservation website (IPaC, https://ecos.fws.gov/ipac/) to assist action agencies determine whether their actions are likely to may overlap with current species occurrences. As a balance between typical foraging distances and potential dispersal movements, high potential zones provide a reasonable basis for describing where the species is likely to be present and where federal agencies should cooperate with the FWS to evaluate the potential effects of their actions. In addition to typical foraging distances, however, we should also consider movements that rusty patched bumble bees may make to establish new home ranges through dispersal. Similar to the process used to model the High Potential Zones, the model produces a series of irregular rings or strata around likely dispersal zones for each record that represent successively decreasing likelihoods of movement by a bumble bee away from the point of observation based on land classifications. We then use the maximum dispersal distance of 6.2 mi (10 km) as a guide to further refine the probability of species occurrence and to identify what we refer to here as Primary Dispersal Zone. We have adapted the first four ‘rings' around each B. affinis record, dated 2007-"current", to produce polygons that describe the area where there is a reasonable potential for the species to be present (i.e., Primary Dispersal Zones). Similarly, we have also modeled additional areas around slightly older records (i.e., 2000-2006 records, Uncertain Sites); these areas are called Uncertain Zones. Both the Primary Dispersal Zones and Uncertain Zones are used when determining where non-lethal surveys are recommended and where a scientific recovery permit for surveys might be recommended.
Creator
USFWS
Temporal Coverage
Last Modified: 2025-06-09
Date Issued
2023-05-31
Rights
These zones will be reevaluated as needed when new populations are discovered or when new data are available that would strongly influence the parameters of the habitat connectivity model. This website will be updated to reflect these changes, however, the sole source of updated information should come from the FWS website ( https://www.fws.gov/species/rusty-patched-bumble-bee-bombus-affinis ) or via the USFWS’s Information for Planning and Conservation website ( https://ipac.ecosphere.fws.gov/ ) when evaluating potential impacts to the rusty patched bumble bee. At a minimum, this information should be updated at the above websites in March of each year prior to the survey season to make sure the most up to date habitat information and survey information is being utilized.
Access Rights
Public
Format
ArcGIS FeatureLayer
Language
English
Date Added
August 10, 2025
Provenance Statement
The metadata for this resource was last retrieved from U.S. Fish and Wildlife Service Open Data on 2025-08-24.

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Cite and Reference

  • Citation
    USFWS (2023). RPBB HPZModel Update [U.S. Fish and Wildlife Service]. . https://gis-fws.opendata.arcgis.com/datasets/fws::rpbb-hpzmodel-update (web service)
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