Alternative Text Description for Unified Reef Map - Florida Reef Tract Benthic Habitats

TABLE OF CONTENTS

MAP OVERVIEW

This map displays benthic habitats throughout the Florida reef tract using the Unified Reef Map classification system at Level 0, which represents broad habitat categories. The map shows the distribution of five major bottom types: artificial structures, coral reef and hardbottom areas, dredged or excavated areas, seagrass beds, and unconsolidated sediment. The Unified Reef Map integrates data from multiple mapping partners to provide a comprehensive view of habitats from Martin County through the Florida Keys to the Dry Tortugas, supporting coordinated scientific research and reef-wide protection efforts.

GEOGRAPHIC CONTEXT

The map covers the southern portion of Florida, extending from approximately Sarasota in the north to the Florida Keys in the south. Major cities and landmarks shown include Sarasota, Port Charlotte, Cape Coral, Naples, Immokalee, Miami, Hollywood, Coral Springs, Boca Raton, West Palm Beach, Port St. Lucie, and Homestead. Lake Okeechobee is visible in the central portion of the mapped area. The map encompasses Florida's western coastline along the Gulf of America and the southeastern Atlantic coastline, with particular focus on the reef tract extending along the Florida Keys island chain.

KEY INSIGHTS

The most striking spatial pattern is the extensive concentration of seagrass habitat (shown in bright green) along the southern Florida Keys, forming a nearly continuous arc from the southwestern keys near Key West extending northeastward past Miami. This seagrass distribution forms a distinctive crescent shape that follows the archipelago. Coral reef and hardbottom habitats (tan/beige) appear as a parallel band primarily along the outer edge of the Keys, situated between the seagrass beds and the open ocean. Unconsolidated sediment areas (pale beige) are interspersed throughout the coastal zones. The northern and western portions of the mapped area, including the Gulf of America coastline, show considerably less habitat diversity at this classification level, with minimal visible reef or seagrass habitats.

VISUAL ELEMENTS

Unified Reef Map Benthic Habitats

This layer represents bottom habitat types throughout the Florida reef tract classified at the broadest hierarchical level (Level 0) of the Unified Classification system.

Seagrass (bright green)

Appearance: Displayed in bright green coloration

Distribution: Extensively distributed along the Florida Keys, particularly concentrated in a broad arc from the southwestern keys through the middle keys and extending northward along the Atlantic coast past Miami and into Palm Beach County

Notable locations: Dominant habitat type throughout most of the Florida Keys region, with particularly wide bands visible near Key West and extending continuously along the island chain. Additional seagrass areas appear in coastal waters near Miami, along the eastern coastline, and scattered areas near the southwestern Florida mainland coast.

Spatial patterns: Forms a distinctive crescent-shaped corridor following the Florida Keys archipelago, typically appearing between the islands and the offshore reef tract. The seagrass habitat shows both continuous expanses and fragmented patches, with the widest and most continuous coverage occurring in the middle and upper Keys region.

Coral Reef and Hardbottom (tan/beige)

Appearance: Displayed in tan or light beige coloration

Distribution: Primarily located along the outer edge of the Florida Keys reef tract, forming a band between the seagrass beds and open ocean waters

Notable locations: Most prominent along the offshore edge of the Keys from Key West extending northeastward, with scattered patches appearing in the middle and upper Keys areas. Some isolated areas also appear in coastal waters near Miami and along portions of the southeastern Florida coast.

Spatial patterns: Generally arranged as a relatively narrow, discontinuous band paralleling the seagrass zones but positioned farther offshore. The coral reef and hardbottom habitats appear more fragmented compared to the seagrass distribution, with distinct patches rather than continuous coverage.

Unconsolidated Sediment (pale beige/cream)

Appearance: Displayed in very pale beige or cream coloration

Distribution: Scattered throughout coastal and nearshore areas of southern Florida, appearing in patches along both the Atlantic and Gulf of America coastlines

Notable locations: Present in various locations throughout the mapped area, including portions of the southwestern Florida coast, areas within and around the Keys, and sections of the southeastern Atlantic coastline near Miami and northward

Spatial patterns: Occurs as irregular patches interspersed between other habitat types, without forming distinct linear patterns. Often appears in areas between seagrass beds and along coastal margins.

Artificial (gray)

Appearance: Displayed in gray coloration

Distribution: Appears in very limited, small scattered locations throughout the mapped area

Notable locations: Individual features are too small to identify specific locations at this map scale, but artificial habitats appear as isolated points or small patches

Spatial patterns: No dominant spatial pattern visible due to the small size and scattered nature of these features

Dredged/Excavated (dark gray)

Appearance: Displayed in dark gray coloration

Distribution: Appears in very limited locations throughout the mapped area

Notable locations: Individual features are difficult to distinguish at this map scale, appearing as small scattered elements

Spatial patterns: No clear spatial pattern evident due to limited distribution and small feature size

Overlapping Patterns

The seagrass and coral reef/hardbottom habitats show a distinct spatial relationship, with seagrass beds generally positioned closer to shore or between the islands, while coral reef and hardbottom areas occupy the more offshore positions. Unconsolidated sediment areas appear to fill gaps between these two major habitat types and occur in transitional zones along coastal margins.

SYMBOL GUIDE

ADDITIONAL INFORMATION

This map displays only the Level 0 classification, which represents the broadest habitat categories in the Unified Classification system. The complete Unified Classification framework includes five hierarchical levels (Level 0 through Level 4), with increasing detail at higher levels. Land areas, unclassified areas, and mangrove habitats have been filtered out of this view through the definition query. The Unified Reef Map is described as a "living map" that will be updated as new data become available from mapping partners. More detailed habitat classifications and information from individual source maps are available through the program. The map supports coordinated research efforts and reef-wide management approaches for protecting Florida's reef tract ecosystem.

DATA CONTEXT

Data Source: The Unified Reef Map integrates individual maps and monitoring data provided by numerous partner organizations. To create the URM, individual maps are integrated, data are edited where overlapping or neighboring maps disagree, and habitat classes are cross-walked using the Unified Classification system to allow comparisons between different mapping efforts. The Unified Classification system is also cross-walked to the Coastal and Marine Ecological Classification Standard (CMECS). Source data layer name: REEFTRACT_JAN25.

Definition Query: This map view displays only benthic habitat data, filtering out areas classified as "LAND," "NOT CLASSIFIED," or "MANGROVE" from the source dataset. The filter criteria used: CLASSLV0 not in ('LAND', 'NOT CLASSIFIED','MANGROVE').

Scale Information: The map shows a regional-scale view of the entire Florida reef tract from Martin County through the Dry Tortugas. At this zoom level, broad habitat patterns and major concentrations are visible, but fine-scale habitat details and small individual features may not be distinguishable.

Coordinate System: NAD 1983 HARN Florida GDL Albers (WKID 3087)

Time Period of Content: The source data is dated January 2025 (REEFTRACT_JAN25). Specific dates for individual component maps vary by mapping partner and location; consult metadata for detailed source date information.

Limitations: The Unified Reef Map represents an integration of multiple source maps with potentially different collection dates, methods, and classification schemes. Areas where source maps overlap or neighbor each other have been edited for consistency, which may introduce modifications from the original partner-provided data. The Level 0 classification shown represents only broad habitat categories; more detailed habitat information is available at higher classification levels (Levels 1-4). The map coverage and habitat detail may vary throughout the reef tract depending on available source data. As a living map, some areas may be updated more recently than others.

Map Coverage: The map extends from the northern portions of southwestern Florida (approximately Sarasota area) southward through the entire Florida Keys to the Dry Tortugas, and along the southeastern Atlantic coast northward through Martin County. The map includes nearshore and offshore waters throughout this extent, focusing on the reef tract ecosystem while showing surrounding land areas for geographic context.

The alternative text description of this map was AI-generated and may contain inaccuracies.