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Table 1: Status of vegetative types in St. Tammany Parish (Source: Louisiana Department of Wildlife and Fisheries, 1999 and St. Tammany New Directions 2025 web site.

Table 1: Status of vegetative types in St. Tammany Parish
Vegetative Type
Abundance/Status
Trend
Causes
Notes
Aquatic
Submersed Estuarine Grassbeds Very rare May be slowly increasing Improving water quality benefitting grassbeds Restricted to shallow brackish water near north shore of Lake Pontchartrain
Fresh Floating/Submersed Vegetation Common Stable    
Wetlands
Fresh Marsh Rare Stable/very slowly declining Saltwater intrusion  
Intermediate Marsh Common Stable/very slowly declining   Restricted to marsh zone on north shore of Lake Pontchartrain and mouth of Pearl River
Brackish Marsh Uncommon Stable/very slowly declining    
Hillside Seepage Bog Exceedingly rare Declining Fire suppression diminishing habitat  
Bald Cypress/Bald Cypress-Tupelo Swamp Common (second growth) Slowly declining   Occupies floodplains of large, permanent streams
Pond Cypress/Blackgum Swamp Rare Slowly declining   Old growth very rare
Bottomland Hardwood Forest Common (second growth) Slowly declining   Old growth very rare
Small Stream Forest Common (second growth) Declining Loss due to clearing and commercial forestry Old growth very rare
Bayhead Swamp Common (poor quality) Declining Loss due to drainage and habitat conversion High-quality examples rare. A major secondary forest type in southeastern St. Tammany
Slash Pine-Pond Cypress/Hardwood Forest Critically imperiled Declining Loss due to fire suppression and habitat conversion Once major secondary forest type in southeastern St. Tammany. Less than 2,000 acres remain in natural state.
Slash Pine/Wiregrass Rare Probably declining   Restricted to narrow marsh fringe zone in flatwoods region. Large areas recently incorporated in Big Branch National Wildlife Refuge.
Gum Pond Uncommon Probably declining   Old growth very rare
Shrub Swamp Uncommon Slowly declining    
Forested Seep Rare Declining Loss due to habitat conversion Restricted to sandy fire protected of uplands of northern St. Tammany. High-quality examples rare.
Longleaf Pine Flatwood Savannah Rare Declining Loss due to fire suppression and habitat conversion Once major secondary forest type in southeastern St. Tammany. Less than 3,000 acres remain in natural condition.
Uplands
Hardwood Slope Forest Very Rare Declining   Restricted to hilly uplands of northeastern St. Tammany. High-quality examples rare.
Mixed Hardwood-Loblolly Forest Uncommon (second growth) Declining   Old growth very rare. Once a major secondary forest type in parish. Still present along intermittent stream bottoms and fire-protected flatwoods.
Shortleaf Pine/Oak-Hickory Forest Critically imperiled Declining Loss due to fire suppression and habitat conversion Once fairly common on upper steep slopes, finger ridges and peninsulas in longleaf pine uplands. Less than 1,000 acres remain in natural condition.
Longleaf Pine Flatwoods Critically imperiled Rapidly Declining Loss due to fire suppression and habitat conversion Once major secondary forest type of pine flatwoods in southeastern St. Tammany. Less than 3,000 acres remain in natural condition.
Upland Longleaf Pine Forest Critically imperiled Rapidly Declining Loss due to fire suppression and habitat conversion Once a dominant forest type of hilly uplands of parish. More than 100,000 acres 100 years ago. Less than 5,000 acres remain. No old growth remains.

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Coastal & Marine Geology Program > Center for Coastal & Regional Marine Studies > Environmental Atlas of Lake Pontchartrain

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Updated December 07, 2016 @ 07:00 PM (JSS)