An edition of: WaterAtlas.orgPresented By: Sarasota County, USF Water Institute

Sarasota County Water Atlas


Creek Oyster Mapping Summary

Oysters were first mapped in seventeen Sarasota County coastal creeks: Whitaker, Hudson, and Elligraw Bayous; and Phillippi, Matheny, Clower, Catfish, North, South, Shakett, Curry, Hatchett, Alligator, Woodmere, Forked, Gottfried, and Ainger Creeks and Cow Pen Slough. The original goal of the project was to locate and identify all oyster habitat types and devise a method to record their location. For the creeks, it was also to determine how far upstream oysters occurred. Aerial maps of the creeks were created and laminated. Staff used permanent markers to draw and code the oyster habitat types directly on the maps. The data was then transferred to maps in ArcGIS for storage, management, and analysis.

Creek Creek
Surface Area (m2)
Total
Oyster Area (m2)
Percent
Oyster Habitat
Oyster Habitat Type Area (m2)
(all habitats) (all habitats) Oyster Reefs (R) Mangrove Apron (MA) Mangrove Root (MRO) Seawall (SW) Rip/Rap (RR) Piling (P) Clump (C) Shell (S)
Ainger Creek 469,693 14,271 3.0% 9,758 306 162 1,957 990 22 1,008 69
Alligator Creek 196,798 11,123 5.7% 4,436 3,408 77 14 15 2,448 725
Catfish Creek 125,282 5,825 4.6% 3,463 679 190 1,346 147
Clower Creek 15,407 798 5.2% 552 146 60 39
Cow Pen Slough 841,156 45,335 5.4% 32,356 99 111 477 1,927 33 8,234 2,097
Curry Creek 205,178 16,003 7.8% 11,045 443 240 1 2,029 2,245
Elligraw Bayou 29,923 819 2.7% 7 730 6 77
Forked Creek 236,758 5,204 2.2% 1,207 84 276 1,405 17 4 1,022 1,189
Gottfried Creek 551,532 20,368 3.7% 12,383 2,980 314 1,906 768 1 1,430 586
Hatchett Creek 25,294 1,302 5.1% 402 77 282 11 4 334 191
Hudson Bayou 84,011 3,070 3.7% 1,331 133 625 3 619 361
Matheny Creek 18,928 113 0.6% 2 61 9 1 41
North Creek 213,556 5,478 2.6% 2,549 663 95 2,148 23
Phillippi Creek 287,772 26,930 6.9% 13,916 2,049 137 612 7,118 3,097
South Creek 280,042 11,004 3.9% 2,151 2,974 692 147 1,347 4 3,506 183
Whitaker Bayou 43,214 1,284 3.0% 984 146 154
Woodmere Creek 96,683 39 0.0% 39

Bay Oyster Mapping Summary

After the oysters were mapped in the creeks, they were mapped in seven Sarasota County Bays: Sarasota Bay (Sarasota County area); Roberts Bay; Little Sarasota Bay; Dryman Bay; Blackburn Bay; Dona Bay/Roberts Bay; and Lemon Bay (Sarasota County area). A more streamlined method of data collection was enabled through the acquisition of a tablet computer. Staff was able to record the data directly into ArcGIS; thus, eliminating the double effort of first recording the data onto laminated aerial maps. Two additional metrics, piling oysters and oyster condition, were also added.

Bay Bay
Surface Area (m2)
Total
Oyster Area (m2)
Percent
Oyster Habitat
Oyster Habitat Type Area (m2)
(all habitats) (all habitats) Oyster Reefs (R) Mangrove Apron (MA) Mangrove Root (MRO) Seawall (SW) Rip/Rap (RR) Piling (P) Clump (C) Shell (S)
Blackburn Bay 2,267,447 7,893 0.3% 2,485 120 889 1,561 659 455 1,612 114
Dona / Roberts Bay 2,000,252 23,395 1.2% 14,034 302 1,343 3,386 539 471 3,271 50
Dryman Bay 694,110 10,388 1.5% 4,228 5,459 395 117 69 28 66 24
Lemon Bay 13,243,722 30,562 0.2% 16,824 1,858 4,884 3,125 651 117 2,235 868
Little Sarasota Bay 7,631,919 56,898 0.7% 45,819 2,175 2,747 3,804 352 246 1,315 440
Roberts Bay 5,557,491 42,144 0.8% 18,498 587 3,233 16,984 546 131 1,256 910
Sarasota Bay 42,307,776 29,495 0.1% 12,958 1,261 11,782 1,328 600 1,019 548

Creek and bay boundaries were delineated by Sarasota County staff for this analysis and may differ from the normal waterbody acreages presented on the Water Atlas.