What are Aquatic Grasses?
Known as aquatic grasses, seagrasses, or submerged aquatic vegetation, these underwater plants are one of the most important habitats in Chesapeake Bay. They require relatively clear water with low nutrient concentrations, so they are an excellent indicator of water quality. Bay grasses provide critical habitat to key species such as blue crab and striped bass, and can improve water clarity.
How are Aquatic Grasses measured?
Estimates of aquatic grasses cover are derived each year by VIMS using aerial surveys. The aquatic grasses score is determined as the area of aquatic grasses present in each of the 15 reporting regions as a percentage of the restoration goal. Each reporting region is assigned a score representing progress towards the goal.
Threshold levels
Reporting Region | SAV restoration goal by reporting region (acres) |
Upper Bay | 14,978 |
Mid Bay | 18,436 |
Lower Bay | 35,872 |
Patuxent River | 1,954 |
Potomac River | 21,203 |
Rappahannock River | 2,534 |
York River | 3,304 |
James River | 2,629 |
Elizabeth River | No Grow Zone |
Upper Eastern Shore | 12,866 |
Choptank River | 13,953 |
Lower Eastern Shore (Tangier) | 57,651 |
Patapsco-Back Rivers | 389 |
Upper Western Shore | 3,661 |
Lower Western Shore (MD) | 1,811 |
Total | 191,241 |