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Legend (nccos/BiogeographicAssessments_NCCOS_StCroix)

St. Croix Composite Resilience (602)
0.5723 - 0.7574 0.5723 - 0.7574
0.5566 - 0.5722 0.5566 - 0.5722
0.5510 - 0.5565 0.5510 - 0.5565
0.5403 - 0.5509 0.5403 - 0.5509
0.5300 - 0.5402 0.5300 - 0.5402
0.4773 - 0.5299 0.4773 - 0.5299
0.4473 - 0.4772 0.4473 - 0.4772
0.4160 - 0.4472 0.4160 - 0.4472
0.3919 - 0.4159 0.3919 - 0.4159
0.3858 - 0.3918 0.3858 - 0.3918
0.3806 - 0.3857 0.3806 - 0.3857
0.3763 - 0.3805 0.3763 - 0.3805
0.3706 - 0.3762 0.3706 - 0.3762
0.3638 - 0.3705 0.3638 - 0.3705
0.3566 - 0.3637 0.3566 - 0.3637
0.3494 - 0.3565 0.3494 - 0.3565
0.3403 - 0.3493 0.3403 - 0.3493
0.3323 - 0.3402 0.3323 - 0.3402
0.3169 - 0.3322 0.3169 - 0.3322
0.1584 - 0.3168 0.1584 - 0.3168
St. Croix Degree Heating Weeks (Degree Heating Weeks above Maximum Monthly Mean) (603)
7.35 - 7.49 7.35 - 7.49
7.23 - 7.34 7.23 - 7.34
7.17 - 7.22 7.17 - 7.22
7.11 - 7.16 7.11 - 7.16
7.01 - 7.10 7.01 - 7.10
6.93 - 7.00 6.93 - 7.00
6.86 - 6.92 6.86 - 6.92
6.65 - 6.85 6.65 - 6.85
6.50 - 6.64 6.50 - 6.64
6.23 - 6.49 6.23 - 6.49
St. Croix Sediment (Relative Values) (604)
0.71 - 0.98 0.71 - 0.98
0.65 - 0.71 0.65 - 0.71
0.57 - 0.65 0.57 - 0.65
0.46 - 0.57 0.46 - 0.57
0.36 - 0.46 0.36 - 0.46
0.27 - 0.36 0.27 - 0.36
0.18 - 0.27 0.18 - 0.27
0.09- 0.18 0.09- 0.18
0.01 - 0.09 0.01 - 0.09
0.00 0.00
St. Croix Ramicrusta spp. Cover (% cover) (605)
3.63 - 9.49 3.63 - 9.49
3.15 - 3.62 3.15 - 3.62
1.62 - 3.14 1.62 - 3.14
0.67 - 1.61 0.67 - 1.61
0.33 - 0.66 0.33 - 0.66
0.31 - 0.32 0.31 - 0.32
0.10 - 0.30 0.10 - 0.30
0.01 - 0.09 0.01 - 0.09
0.00 0.00
St. Croix Macroalgae Cover (% cover) (606)
38.87 - 46.08 38.87 - 46.08
34.15 - 38.86 34.15 - 38.86
33.36 - 34.14 33.36 - 34.14
29.46 - 33.35 29.46 - 33.35
29.41 - 29.45 29.41 - 29.45
24.84 - 29.40 24.84 - 29.40
22.65 - 24.83 22.65 - 24.83
21.64 - 22.64 21.64 - 22.64
17.51 - 21.63 17.51 - 21.63
8.55 - 17.50 8.55 - 17.50
St. Croix Wave Energy: Wave-induced flow near the sea floor (meters/second) (607)
0.36 - 0.99 0.36 - 0.99
0.20 - 0.35 0.20 - 0.35
0.13 - 0.19 0.13 - 0.19
0.09 - 0.12 0.09 - 0.12
0.06 - 0.08 0.06 - 0.08
0.04 - 0.05 0.04 - 0.05
0.03 0.03
0.02 0.02
0.01 0.01
0.00 0.00
St. Croix Depth (meters) (609)
-88.01 - -42.78 -88.01 - -42.78
-42.77 - -37.66 -42.77 - -37.66
-37.65 - -31.89 -37.65 - -31.89
-31.88 - -26.70 -31.88 - -26.70
-26.69 - -23.68 -26.69 - -23.68
-23.67 - -20.38 -23.67 - -20.38
-20.37 - -16.19 -20.37 - -16.19
-16.18 - -12.10 -16.18 - -12.10
-12.09 - -7.59 -12.09 - -7.59
-7.58 - -0.07 -7.58 - -0.07
St. Croix Geomorphology (Rugosity) (610)
1.05 1.05
1.04 1.04
1.03 1.03
1.02 1.02
1.01 1.01
1.00 1.00
St. Croix Orbicella Species Abundance (Coral count per 10 m²) (611)
0.82 - 0.91 0.82 - 0.91
0.81 0.81
0.71 - 0.80 0.71 - 0.80
0.56 - 0.70 0.56 - 0.70
0.51 - 0.55 0.51 - 0.55
0.34 - 0.50 0.34 - 0.50
0.26 - 0.33 0.26 - 0.33
0.14 - 0.25 0.14 - 0.25
St. Croix Acropora Species Abundance (Coral count per 10 m²) (612)
0.44 - 0.45 0.44 - 0.45
0.31 - 0.43 0.31 - 0.43
0.28 - 0.30 0.28 - 0.30
0.20 - 0.27 0.20 - 0.27
0.15 - 0.19 0.15 - 0.19
0.11 - 0.14 0.11 - 0.14
0.01 - 0.10 0.01 - 0.10
0.00 0.00
St. Croix Coral Cover (% cover) (613)
9.31 - 12.24 9.31 - 12.24
7.95 - 9.30 7.95 - 9.30
5.73 - 7.94 5.73 - 7.94
1.72 - 5.72 1.72 - 5.72
1.59 - 1.71 1.59 - 1.71
1.53 - 1.58 1.53 - 1.58
1.50 - 1.52 1.50 - 1.52
0.00 - 1.49 0.00 - 1.49
St. Croix SCTLD Resistant Abundance (Coral count per 10 m²) (614)
35.21 - 35.77 35.21 - 35.77
30.60 - 35.20 30.60 - 35.20
23.07 - 30.59 23.07 - 30.59
20.51 - 23.06 20.51 - 23.06
15.89 - 20.50 15.89 - 20.50
10.15 - 15.88 10.15 - 15.88
7.06 - 10.14 7.06 - 10.14
6.31 - 7.05 6.31 - 7.05
2.01 - 6.30 2.01 - 6.30
2.00 2.00
St. Croix Fish Biomass: All Species (biomass kg/177 m²) (615)
15.29 - 19.03 15.29 - 19.03
14.76 - 15.28 14.76 - 15.28
8.92 - 14.75 8.92 - 14.75
7.29 - 8.91 7.29 - 8.91
6.61 - 7.28 6.61 - 7.28
6.01 - 6.60 6.01 - 6.60
5.02 - 6.00 5.02 - 6.00
1.47 - 5.01 1.47 - 5.01
St. Croix Fish Biomass: Herbivore Species (biomass kg/177m²) (616)
4.58 - 4.62 4.58 - 4.62
4.03 - 4.57 4.03 - 4.57
3.36 - 4.02 3.36 - 4.02
2.09 - 3.35 2.09 - 3.35
1.67 - 2.08 1.67 - 2.08
1.66 1.66
1.45 - 1.65 1.45 - 1.65
0.98 - 1.44 0.98 - 1.44
0.15 - 0.97 0.15 - 0.97
St. Croix Fish Biomass: Commercial Species (biomass kg/177m²) (617)
9.86 - 10.66 9.86 - 10.66
9.28 - 9.85 9.28 - 9.85
7.15 - 9.27 7.15 - 9.27
5.14 - 7.14 5.14 - 7.14
5.13 5.13
4.68 - 5.12 4.68 - 5.12
4.48 - 4.67 4.48 - 4.67
3.15 - 4.47 3.15 - 4.47
1.27 - 3.14 1.27 - 3.14
St. Croix Crustose Coraline Algae Cover (% cover) (618)
4.51 - 4.65 4.51 - 4.65
3.20 - 4.50 3.20 - 4.50
2.41 - 3.19 2.41 - 3.19
2.39 - 2.40 2.39 - 2.40
2.23 - 2.38 2.23 - 2.38
1.58 - 2.22 1.58 - 2.22
1.27 - 1.57 1.27 - 1.57
0.89 - 1.26 0.89 - 1.26
0.81 - 0.88 0.81 - 0.88
0.00 - 0.80 0.00 - 0.80
St. Croix Colpophyllia natans abundance (Coral count per 10 m²) (619)
0.10 - 0.11 0.10 - 0.11
0.09 0.09
0.06 - 0.08 0.06 - 0.08
0.05 0.05
0.04 0.04
0.01 - 0.03 0.01 - 0.03
0.00 0.00
St. Croix Dendrogyra cylindrus abundance (Coral count per 10 m²) (620)
0.00 0.00
St. Croix Dichocoenia stokesii abundance (Coral count per 10 m²) (621)
0.15 - 0.50 0.15 - 0.50
0.12 - 0.14 0.12 - 0.14
0.09 - 0.11 0.09 - 0.11
0.06 - 0.08 0.06 - 0.08
0.01 - 0.05 0.01 - 0.05
0.00 0.00
St. Croix Diploria labyrinthiformis abundance (Coral count per 10 m²) (622)
0.40 - 0.63 0.40 - 0.63
0.29 - 0.39 0.29 - 0.39
0.25 - 0.28 0.25 - 0.28
0.15 - 0.24 0.15 - 0.24
0.01 - 0.14 0.01 - 0.14
0.00 0.00
St. Croix Eusmilia fastigiata abundance (Coral count per 10 m²) (623)
0.10 - 0.20 0.10 - 0.20
0.09 0.09
0.06 - 0.08 0.06 - 0.08
0.03 - 0.05 0.03 - 0.05
0.01 - 0.02 0.01 - 0.02
0.00 0.00
St. Croix Meandrina meandrites abundance (Coral count per 10 m²) (624)
0.11 0.11
0.09 - 0.10 0.09 - 0.10
0.06 - 0.08 0.06 - 0.08
0.06 - 0.05 0.06 - 0.05
0.05 0.05
0.04 0.04
0.03 0.03
0.00 - 0.02 0.00 - 0.02
St. Croix Pseudodiploria clivosa abundance (Coral count per 10 m²) (625)
0.67 - 0.88 0.67 - 0.88
0.24 - 0.66 0.24 - 0.66
0.01 - 0.23 0.01 - 0.23
0.00 0.00
St. Croix Pseudodiploria strigosa abundance (Coral count per 10 m²) (626)
1.16 - 2.14 1.16 - 2.14
1.06 - 1.15 1.06 - 1.15
0.26 - 1.05 0.26 - 1.05
0.11 - 0.25 0.11 - 0.25
0.11 - 0.10 0.11 - 0.10
0.00 - 0.10 0.00 - 0.10
St. Croix Hillshade (201)
High : 254 - Low : 0 High : 254 - Low : 0
St. Croix Bathymetry (202)
High : 0 m - Low : -292.809 m High : 0 m - Low : -292.809 m
Buck Island Reef National Monument Benthic Habitat Map (Deep) (204)
Mud Mud
Rock/Boulder Rock/Boulder
Unknown Unknown
Buck Island Reef National Monument Benthic Habitat Map (Moderate) (205)
Mud Mud
Pavement Pavement
Pavement with Sand Channels Pavement with Sand Channels
Rhodoliths Rhodoliths
Rock/Boulder Rock/Boulder
Sand Sand
Sand with Scattered Coral and Rock Sand with Scattered Coral and Rock
Unknown Unknown
Buck Island Reef National Monument Benthic Habitat Map (Shallow) (206)
Aggregate Reef Aggregate Reef
Aggregated Patch Reefs Aggregated Patch Reefs
Artificial Artificial
Individual Patch Reef Individual Patch Reef
Land Land
Mud Mud
Pavement Pavement
Pavement with Sand Channels Pavement with Sand Channels
Reef Rubble Reef Rubble
Rhodoliths Rhodoliths
Rhodoliths with Scattered Coral and Rock Rhodoliths with Scattered Coral and Rock
Rock/Boulder Rock/Boulder
Sand Sand
Sand with Scattered Coral and Rock Sand with Scattered Coral and Rock
St. Croix Benthic Habitat Map (207)
Artificial Artificial
Colonized Bedrock Colonized Bedrock
Colonized Pavement Colonized Pavement
Colonized Pavement with Sand Channels Colonized Pavement with Sand Channels
Linear Reef Linear Reef
Macroalgae Macroalgae
Mangrove Mangrove
Mud Mud
Patch Reef (Aggregated) Patch Reef (Aggregated)
Patch Reef (Individual) Patch Reef (Individual)
Reef Rubble Reef Rubble
Sand Sand
Scattered Coral/Rock in Unconsolidated Sediment Scattered Coral/Rock in Unconsolidated Sediment
Seagrass Seagrass
Spur and Groove Reef Spur and Groove Reef
Uncolonized Bedrock Uncolonized Bedrock
Uncolonized Pavement Uncolonized Pavement
Marine Park (500)
National Historic Park and Ecological Preserve (501)
National Monument (502)
National Wildlife Refuge (503)
Fishery Management Area (504)
St. Croix Observed Presence of Hard Bottom (209)
Present Present
St. Croix Predicted Presence of Hard Bottom (20 m) (210)
Predicted Presence Predicted Presence
St. Croix Predicted Presence of Hard Bottom (100 m) (211)
Predicted Presence Predicted Presence
St. Croix Predicted Percentage of Hard Bottom (212)
High : 100% - Low : 0% High : 100% - Low : 0%
St. Croix Seafloor Slope of Slope (20 m) (214)
High : 57.5657 - Low : 0.000283053 High : 57.5657 - Low : 0.000283053
St. Croix Maximum Seafloor Slope of Slope (100 m) (216)
High : 39.211 - Low : 0.0200605 High : 39.211 - Low : 0.0200605
St. Croix Masked Maximum Seafloor Slope of Slope (217)
High : 39.211 - Low : 0.0234095 High : 39.211 - Low : 0.0234095
St. Croix Maximum Slope of Slope (200 m radius) (215)
High : 57.5657 - Low : 0.000283053 High : 57.5657 - Low : 0.000283053
St. Croix Coral Percent Cover (600)
0.00% - 0.17% 0.00% - 0.17%
0.17% - 0.44% 0.17% - 0.44%
0.44% - 0.96% 0.44% - 0.96%
0,96% - 2.92% 0,96% - 2.92%
2.92% - 43.00% 2.92% - 43.00%
St. Croix Acropora cervicornis Presence (219)
St. Croix Minimum Predicted Acropora cervicornis Presence (220)
Prediction Prediction
St. Croix Mean Predicted Acropora cervicornis Presence (221)
Low Low
Medium-Low Medium-Low
Medium Medium
High High
Very High Very High
St. Croix Acropora palmata Presence (222)
St. Croix Minimum Predicted Acropora palmata Presence (223)
Prediction Prediction
St. Croix Mean Predicted Acropora palmata Presence (224)
Low Low
Medium-Low Medium-Low
Medium Medium
High High
Very High Very High
St. Croix Seagrass Presence (226)
Present Present
St. Croix Predicted Presence of Hard Bottom Near Seagrass (227)
Prediction Prediction
St. Croix Distance to Seagrass (228)
0 - 300 m 0 - 300 m
> 300 m > 300 m
St. Croix Mangrove Presence (229)
Present Present
St. Croix Predicted Presence of Hard Bottom Near Mangroves (230)
Prediction Prediction
St. Croix Distance to Mangroves (231)
0 - 300 m 0 - 300 m
> 300 m > 300 m
St. Croix Fish Species Richness (506)
1 - 9 1 - 9
10 - 20 10 - 20
21 - 28 21 - 28
29 - 35 29 - 35
36 - 70 36 - 70
St. Croix Total Fish Abundance (507)
1 - 39 1 - 39
40 - 99 40 - 99
100 - 151 100 - 151
152 - 218 152 - 218
219 - 15506 219 - 15506
St. Croix Mean Predicted Fish Species Richness (234)
High : 39.5769 - Low : 2.82418 High : 39.5769 - Low : 2.82418
St. Croix Maximum of Mean Predicted Fish Species Richness (100 m) (235)
High : 39.5769 - Low : 4.89646 High : 39.5769 - Low : 4.89646
St. Croix Masked Maximum of Mean Predicted Fish Species Richness (100 m) (236)
High : 39.5769 - Low : 5.72846 High : 39.5769 - Low : 5.72846
St. Croix Fish Spawning Aggregations (238)
St. Croix Index of Reef Quality (240)
Class A Class A
Class B Class B
Long Term Monitoring Sites (242)
St. Croix Reef Tourism Service Value (243)
High : 7.61 - Low : 0 High : 7.61 - Low : 0
St. Croix Mature Fish Biomass (244)
0 - 2500 g 0 - 2500 g
2500 - 5000 g 2500 - 5000 g
5000 - 10000 g 5000 - 10000 g
10000 - 25000 g 10000 - 25000 g
> 25000 g > 25000 g
St. Croix Mean Predicted Mature Fish Biomass (245)
High : 7160.82 - Low : 294.744 High : 7160.82 - Low : 294.744
St. Croix High Quality Reefs (diver identification) (246)
1 - 2 (# of divers) 1 - 2 (# of divers)
3 - 4 3 - 4
5 - 7 5 - 7
8 - 11 8 - 11
12 - 15 12 - 15
St. Croix Ship Traffic (248)
High : 150588 - Low : 0 High : 150588 - Low : 0
St. Croix Exposure to Land Runoff (249)
High : 1 - Low : 2.66454e-15 High : 1 - Low : 2.66454e-15
St. Croix Thermal Stress (250)
High : 16 - Low : 0 High : 16 - Low : 0
USVI Average Wave Height (251)
High : 1.39562 m - Low : 0.0629599 m High : 1.39562 m - Low : 0.0629599 m
St. Croix Maximum Wave Height (252)
High : 5.80901 m - Low : 0.0977856 m High : 5.80901 m - Low : 0.0977856 m
PRVI Average Wave Power (253)
High : 22.5148 Kw/m - Low : 0.00512397 Kw/m High : 22.5148 Kw/m - Low : 0.00512397 Kw/m
St. Croix Guts (508)
St. Croix Watersheds (509)
St. Croix C-CAP Landcover (254)
Bare Land Bare Land
Cultivated Crops Cultivated Crops
Deciduous Forest Deciduous Forest
Developed, Open Space Developed, Open Space
Estuarine Emergent Wetland Estuarine Emergent Wetland
Estuarine Forested Wetland Estuarine Forested Wetland
Estuarine Scrub/Shrub Wetland Estuarine Scrub/Shrub Wetland
Evergreen Forest Evergreen Forest
Grassland/Herbaceous Grassland/Herbaceous
Impervious Surface Impervious Surface
Mixed Forest Mixed Forest
Open Water Open Water
Palustrine Emergent Wetland Palustrine Emergent Wetland
Palustrine Forested Wetland Palustrine Forested Wetland
Palustrine Scrub/Shrub Wetland Palustrine Scrub/Shrub Wetland
Pasture/Hay Pasture/Hay
Scrub/Shrub Scrub/Shrub
Unclassified Unclassified
Unconsolidated Shore Unconsolidated Shore
St. Croix Landscape Development Intensity Index (255)
1.56 - 1.76 LDI values 1.56 - 1.76 LDI values
1.77 - 2.11 1.77 - 2.11
2.12 - 2.49 2.12 - 2.49
2.50 - 2.92 2.50 - 2.92
2.93 - 3.58 2.93 - 3.58