Historical Range and Distribution

The PCC’s historic range is located in south-central Bay County, Florida and is estimated to cover a 56 square mile area (FWS GIS 2017). It’s range, on a peninsula, is bounded by Callaway Bayou to the southeast, Callaway Creek to the east, Bayou George Creek and the headwaters of Callaway Creek to the northeast, North Bay to the north, West Bay to the west, and St. Andrew Bay and East Bay to the south (Figure3.1).

PCC range.
Figure 3.1. The range of the Panama City crayfish is bordered on the east by Callaway Creek, the northeast by Bayou George Creek, the north by North Bay, the west by West Bay, and the south by East and St. Andrew Bays.

The PCC range overlaps jurisdictional boundaries of four cities (Panama City, Lynn Haven, Callaway, Springfield) and Bay County proper (Figure 3.2).

PCC occurrence.
Figure 3.2. The PCC occurs within 4 city limits and Bay County proper.

Using the Natural Resource Conservation Service—Soil Survey Geographic Database (NRCS SSURGO) dataset, ArcGIS software was used to calculate the acreage of core and secondary soils within the historic range of the PCC prior to anthropogenic habitat disturbances (FWS GIS 2017) (Figure 3.3).

PCC historical habitat distribution
Figure 3.3. Depicts habitats available to the PCC historically prior to habitat alterations.

We used the Cooperative Land Cover (CLC) version 3.2 GIS data obtained from Florida Fish and Wildlife Conservation Commission (FWC)-Florida Fish and Wildlife Research Institute (FWRI) and the Florida Department of Revenue (FDOR) parcel data to filter out habitats considered “developed” or unsuitable to the PCC. Familiarity with the local landscape, we recognize that some hardwood swamps not considered suitable for the PCC, except the ecotonal transition habitat, still fall within the core soil category but with time limitations for field checks these remain within the estimated original acreage. Land acreages within the PCC’s range total 35,658 acres, with a composition of the following soils: 1) core with 14,880 acres (42% of the land area); 2) secondary with 12,379 (35% of the land area), and 3) unsuitable soils with 8,399 acres (23% of the land area) (Table 3.1). We estimate that historically 3,898 acres of the core (3,242 acres [22%]) and secondary (364 acres [3%]) are hardwood swamp, not directly used by the PCC but included in Table 3.1 totals.

Table 3.1. Historic and current core and secondary soil acreage available to the PCC minus some hardwood swamp habitats not suitable for the species.
PCC Range= 56 sq. miles
Historic Acres (hectares)
% of Range
2016 Undeveloped acres (hectares)
% of historic ac remaining
Acres within Range 35, 658
(14,430)
100% 14,827
(6,000)
42%
Core Soils 14,880
(6021)
42% 9,180
(3,715)
62%
Secondary Soils 12,379
(5,010)
35% 5,647 (2,285) 46%
Unsuitable Soils 8,399
(3,399)
23% 3,328
(1,347)
40%