Ecological System:
Lacustrine
L1RB1  Lacustrine, Limnetic, Rock Bottom, Bedrock
L1RB2  Lacustrine, Limnetic, Rock Bottom, Boulder
L1UB1  Lacustrine, Limnetic, Unconsolidated Bottom, Cobble/Gravel
L1UB2  Lacustrine, Limnetic, Unconsolidated Bottom, Sand
L1UB3  Lacustrine, Limnetic, Unconsolidated Bottom, Mud
L1UB4  Lacustrine, Limnetic, Unconsolidated Bottom, Organic
L1AB1  Lacustrine, Limnetic, Aquatic Bed, Submergent Algal
L1AB2  Lacustrine, Limnetic, Aquatic Bed, Submergent Vascular
L1AB3  Lacustrine, Limnetic, Aquatic Bed, Submergent Moss
L1AB4  Lacustrine, Limnetic, Aquatic Bed, Floating-leaved
L1AB5  Lacustrine, Limnetic, Aquatic Bed, Floating 
L1AB6  Lacustrine, Limnetic, Aquatic Bed, Unknown Submergent
L1AB7  Lacustrine, Limnetic, Aquatic Bed, Unknown Surface
L1OW-  Lacustrine, Limnetic, Open Water, Unknown Bottom
L2RB1  Lacustrine, Littoral, Rock Bottom, Bedrock
L2RB2  Lacustrine, Littoral, Rock Bottom, Boulder
L2UB1  Lacustrine, Littoral, Unconsolidated Bottom, Cobble/Gravel
L2UB2  Lacustrine, Littoral, Unconsolidated Bottom, Sand
L2UB3  Lacustrine, Littoral, Unconsolidated Bottom, Mud
L2UB4  Lacustrine, Littoral, Unconsolidated Bottom, Organic
L2AB1  Lacustrine, Littoral, Aquatic Bed, Submergent Algal
L2AB2  Lacustrine, Littoral, Aquatic Bed, Submergent Vascular
L2AB3  Lacustrine, Littoral, Aquatic Bed, Submergent Moss
L2AB4  Lacustrine, Littoral, Aquatic Bed, Floating -leaved
L2AB5  Lacustrine, Littoral, Aquatic Bed, Floating
L2AB6  Lacustrine, Littoral, Aquatic Bed, Unknown Submergent
L2AB7  Lacustrine, Littoral, Aquatic Bed, Unknown Surface
L2FL1  Lacustrine, Littoral, Flat, Cobble/Gravel
L2FL2  Lacustrine, Littoral, Flat, Sand
L2FL3  Lacustrine, Littoral, Flat, Mud
L2FL4  Lacustrine, Littoral, Flat, Organic
L2FL5  Lacustrine, Littoral, Flat, Vegetated Pioneer
L2FL6  Lacustrine, Littoral, Flat, Vegetated Non-pioneer
L2RS1  Lacustrine, Littoral, Rocky Shale, Bedrock
L2RS2  Lacustrine, Littoral, Rocky Shale, Boulder
L2BB1  Lacustrine, Littoral, Beach/Bar, Cobble/Gravel
L2BB2  Lacustrine, Littoral, Beach/Bar, Sand
L2EM1  Lacustrine, Littoral, Emergent, Nonpersistent 
L2EM3  Lacustrine, Littoral, Emergent, Narrow-leaved Nonpersistent
L2EM4  Lacustrine, Littoral, Emergent, Broad-leaved Nonpersistent
L2OW-  Lacustrine, Littoral, Open Water, Unknown Bottom