Alabama 2019 Submerged Aquatic Vegetation Polygons

Dataset extent

Map data © OpenStreetMap contributors

This 2019 dataset consists of digital vector data describing the location, extent and species composition of submerged aquatic vegetation (SAV) in coastal Alabama, including Mississippi Sound, Mobile Bay, Mobile-Tensaw Delta, Mississippi Sound, Little Lagoon, Perdido Bay, and their communicating tributaries. The dataset includes a MrSID ortho mosaic produced from true-color digital aerial imagery acquired on July 26, 29, and 31 and August 1 and 2. ESRI polygon coverage of SAV was created in ArcGIS 10.7, using the MrSID as a base map. SAV distribution was concentrated in upper Mobile Bay and the lower Mobile-Tensaw Delta, Mississippi Sound, and the lower Perdido Bay area of southeast Baldwin County. Overall, there were 866 more acres mapped in 2019 compared to 2015, due mostly to a 469-ac increase in the Hurricane quadrangle, particularly areas around Gravine Island and Chuckfee Bay. There were 149 more acres mapped in the Chickasaw quad compared to 2015, due to expansion of SAV in the Duck Lake region. The Orange Beach Quadrangle had an increase of 74 acres, mostly due to expanded coverage in the area of St. John Bayou. Habitat categories were developed based on observation of the most prevalent species at field survey locations. Of the 37 habitat categories identified, most were mixtures of species occurring in oligohaline and freshwater systems.

Data and Resources

Additional Info

Field Value
Author Kenneth L. Heck, Jr. Professor and Senior Marine Scientist (Emeritus)
Last Updated April 12, 2023, 15:16 (UTC)
Created July 22, 2022, 23:19 (UTC)
Content Create Date 2020-05-15 Barry A. Vittor and Associates, Inc.
ISO.originator Dottie Byron <None>
ISO.pointOfContact DISL Data Management
ISO.principalInvestigator Kenneth L. Heck, Jr. Professor and Senior Marine Scientist (Emeritus) <>
ISO.principalInvestigator.1 Dottie Byron <>
ISO.publisher Barry A. Vittor and Associates, Inc.
Place Keywords Alabama Coast, Mobile County, Baldwin County, Mobile Bay, Mobile Tensaw Delta, Mississippi Sound, Perdido Bay
Temporal Begin 2019-08-01
Temporal End 2020-05-15
Theme Keywords Submerged Aquatic Vegetation
Use Constraints Acknowledgement of Barry A. Vittor and Associates, Inc. as the data source and originator would be appreciated in any products developed from these data, and such acknowledgment as is standard for citation and legal practices for data source is expected by users of this data. Users should be aware that comparison with other data sets for the same area from other time periods may be inaccurate due to inconsistencies resulting from changes in mapping conventions, data collection, field conditions, and computer processes over time. The distributor shall not be liable for improper or incorrect use of these data, based on the description of appropriate/inappropriate uses described in the metadata document. These data are not legal documents and are not to be used as such. This dataset was prepared by Barry A. Vittor and Associates, Inc. for the Dauphin Island Sea Lab using Federal funds under Award No. GNTCP18AL0068 from the Gulf Coast Ecosystem Restoration Council (RESTORE Council). The statements, findings, conclusions, and recommendations are those of the author(s) and do not necessarily reflect the views of the RESTORE Council.
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