26 
Appendix II 
X-coordinate Numbers (Left-hand Column) and the Corresponding Breeding Niches 
by Strata (Right-hand Column) used in the Determination of Wildlife Guilds 
1.0 Tidal (marine and estuarine systems) 
1.1 Water typically contains a high dissolved solid (>30 ppt) content 
Bottom of water column (include substrates under water columns >25 cm deep) 
001 Corral reef 
002 Worm reef 
003 Mollusk reef 
004 Man-made structure (artificial reef) 
005 Bedrock (solid rock mass) 
006 Boulder (>305 mm) 
O07 Rubble (152-305 mm) 
008 Cobble (64-152 mm) 
009 Gravel (2-64 mm) 
010 Sand (0.063-2 mm) 
O11 Mud (<0.063 mm) or organic matter (detritus or sapropel) 
012 Submerged algae or moss 
013 Submerged rooted vascular plants 
Water column (water >25 cm below the surface) 
014 Water shallow (<2 m) 
015 Water deep (>2 m) 
Surface of water column (includes substrates and vegetative cover at shoreline or under shallow water 
[<25 cm deep], open water [<25 cm deep], and types of vegetation extending up to or through surface 
waters) 
016 Artificial (man-made) structures 
017 Bedrock (solid rock mass) 
018 Boulder (>305 mm) 
019 Rubble (152-305 mm) 
020 Cobble (64-152 mm) 
021 Gravel (2-64 mm) 
022 Sand (0.063-2 mm) 
023 Mud (<0.063 mm) or organic matter (detritus or sapropel) 
024 Aquatic bed —algae, moss, or lichen 
025 Rooted herbaceous vegetation 
026 Rooted woody vegetation 
027 Open water 
028 Floating filamentous algae (non-rooted and rooted) 
029 Floating non-woody vascular plants (non-rooted) 
030 Floating non-woody vascular plants (rooted) 
031 Floating woody vascular plants (non-rooted) 
032 Floating woody vascular plants (rooted) 
033 Emergent non-woody vascular plants 
034 Emergent woody vascular plants 
1.2 Water typically contains a moderate dissolved solid (0.5-30 ppt) content 
Bottom of water column (includes substrates under water columns > 25 cm deep) 
035 Corral reef 
036 Worm reef 
037 Mollusk reef 
038 Man-made structure (artificial reef) 
039 Bedrock (solid rock mass) 
