Native Habitat Inventory Final Report 2004 - St. Lucie County

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Appendix H. Mapping Discussion This appendix provides a discussion of general mapping issues encountered when working with a GIS system and items specific to this project. Large Mapping Scale FLUCCS is mapped in 0.25 acre blocks for developed areas and 1 acre blocks for undeveloped areas. This results in inclusions. Inclusions are small but distinct natural community types that are found within larger communities and are classified as the larger community type. These inclusions also account for what appear to be illogical reversals in community types and contribute to the one-to-many relationship between FLUCCS and FNAI community types. For example, the reclassification of Temperate Hardwoods (425) to Blackwater <strong>St</strong>ream. Heads Up Digitizing Reclassifying the sites into FNAI natural community types leads to the drawing of new community type boundaries (new polygons). These new boundaries were often very different from the FLUCCS boundaries. This leads to a one-to-many relationship as discussed above. However, in some cases, when the FNAI community type boundaries were head-up digitized they were only very slightly different from those original FLUCCS boundaries. These small differences in line locations between the 2 data layers are slivers. Each sliver (e.g., polygon) is a tiny area, often a hundredth or a thousandth of an acre in size. But if the slivers are summed over the entire area of the 30 sites they may amount to several acres. However, this information should not be used to create a relationship between FLUCCS and FNAI types since it is an artifact of the mapping process. These slivers can also lead to both apparently illogical reclassifications as well as the one-tomany relationship between FLUCCS and FNAI. For example, Hardwoods-Conifer Mixed reclassified to Scrub. There are 23 occurrences that adds up to 8 acres total. This is an artifact of the mapping methodology, on the ground there were no drastic changes in community type from mesic to xeric. Semi-Natural Area Semi-natural areas (e.g., pastures and rangeland) are often established over wide areas and replace and/or impinge upon more complex natural systems containing many different natural community types. This leads to a one-to-many relationship between FLUCCS and FNAI. Under the established protocol for this project, FLUCCS seminatural areas were not usually reclassified as FNAI types. What happened more frequently during this project was that the lines at the edges of a natural community were redrawn to more accurately reflect the on the ground conditions and this results in an agricultural area being reclassified as several different FNAI types. Thus a single agricultural FLUCCS may be reclassified as several FNAI types and some of these may 257
appear to be dramatic shifts. Again, however, no such dramatic change has occurred, it is an artifact of the mapping process. Table 1. Matrix showing the relationship between the mapping limitations and the data used to develop the FLUCCS to FNAI natural community relationship. An X indicates the subsequent issues that arise. FLUCCS Large Mapping Scale Heads-up Digitizing Method Semi-Natural Conditions Inclusions X One-to-Many X X X Illogical X X X reclassifications Slivers X 258
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St. Lucie County Native Habitat Inv
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Table of Contents Acknowledgements
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Appendix E. List of Rare Species th
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Acknowledgements Pandion Systems wo
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Glossary ACI - Area of Conservation
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Executive Summary The overall objec
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The Site Data Summaries and Ranks s
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• To identify and prioritize land
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The species-area relationship does
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composition through selective grazi
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Site No Site Rank Overall Ecologica
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The Site Data Summaries and Ranks s
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5 -- Slated for development or prim
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5 -- Directly contiguous with large
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Methods and Results Overview This p
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Project Team made a judgment call o
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Figure 3. St. Lucie County 2002 Nat
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Discussion of Methodology The limit
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Table 6. Estimated Acreages of FNAI
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Inventory of Existing Native Upland
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Number Polygons 49 385 1,318 FLUCCS
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Despite these exceptions, most spec
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Table 10. Summary of FLUCCS Types a
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SITE NAME FLUCCS Descriptions FLUCC
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SITE NAME FLUCCS Descriptions FLUCC
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Table 11. Comparison of the Amount
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FLUCCS Number FLUCCS Description Ac
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mixed landowner response. Ultimatel
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Developing Field Data Collection Ma
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Table 12. Example of Calculation of
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influences rather than natural infl
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FLUCCS FLUCCS Description 213 Sum o
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FLUCCS FLUCCS Description FNAI Assi
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southeastern kestrel, Florida sandh
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Site 4N. FNAI Natural Communities L
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Site 4S. FNAI Natural Communities L
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Table 2. Community Types present on
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Site Number: 24 Site Rank: A Total
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Common Name Scientific Name FLEPPC
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Site 24. Rare Species [´ hg [´ hg
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Site 25. FNAI Natural Communities L
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Site 25. Invasive Exotic Species qp
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Site History/Habitat Disturbance -
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SIte 41. Rare Species Legend qp Cha
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Site Number: 42 Site Rank: A/B Tota
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Ownership/Notes - The west part is
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Site 42. Rare Species [ [ [ [ Legen
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Ownership/Notes - Permission for gr
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Hydrology - The hydrology has been
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SIte 51. Rare Species Legend [ Goph
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Canals surround the site but the si
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Site Number: 7 Site Rank: B Total A
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Management for this site will be th
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Site Number: 11 Site Rank: B Total
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Table 4. Invasive Exotic Species ob
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Site 11. Rare Species * [` l Legend
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vegetation observed. There are some
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Proximity to primary and secondary
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143
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Table 2. Community Types present on
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Site 15. Rare Species "e "e Legend
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Site 18. Rare Species Legend !F Gru
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155
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Fork of the St. Lucie which is the
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Site History/Habitat Disturbance- T
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Site 28. Rare Species [ [¨ ih hg [
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Table 3. Listed Species observed. C
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Site 30. Rare Species ih [ [ [¨[ l
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Hydrology - The overall hydrologica
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Table 3. Listed Species observed. C
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Site 16. Invasive Exotic Species Le
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Site Number: 17 Site Rank: C Total
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187
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Hydrology - The vegetation at the t
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Site 26. Invasive Exotic Species ¡
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¡£ qp Site 27. Invasive Exotic Sp
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Page 220 and 221: Site 31. FNAI Natural Communities L
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Page 224 and 225: Site Number: 32 Site Rank: C Total
Page 242 and 243: Conclusions The opportunity for pre
Page 244 and 245: Bibliography Cooper RM, Ortel TW. 1
Page 246 and 247: Lenze DG. 2002. Florida Long-term E
Page 248 and 249: Appendices Appendix A. Explanation
Page 250 and 251: Definitions derived from U.S. Endan
Page 252 and 253: Appendix B. Rare Species Observed R
Page 254 and 255: Appendix D. Natural Communities Obs
Page 256 and 257: Scientific Name Common Name Coelora
Page 258 and 259: Scientific Name Common Name Federal
Page 266 and 267: Scientific Name Global Occurrence S
Page 268 and 269: BOARD OF COUNTY COMMISSIONERS PUBLI
Page 272 and 273: Appendix I. Conversion of FLUCCS Ca
Page 274 and 275: FLUCCS FLUCCS Description FNAI Assi
Page 276 and 277: FLUCCS to FNAI Conversion Improved
Page 278 and 279: FLUCCS to FNAI Conversion Mixed Ran
Page 280 and 281: FLUCCS to FNAI Conversion Lakes
Page 282 and 283: Table 13. Community Conversion from
Page 284 and 285: FLUCCS FLUCCS Description FNAI Assi
Page 286 and 287: FLUCCS to FNAI Conversion Longleaf
Page 288 and 289: FLUCCS to FNAI Conversion Hardwood-
Page 290 and 291: FLUCCS to FNAI Conversion Wetland F
Page 292 and 293: FLUCCS to FNAI Conversion Cypress w
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Native Habitat Inventory Final Report 2004 - St. Lucie County

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