Program Info

Website
https://loxahatcheeriver.org/river/seagrass/
Region(s)
NE
Summary
The project quantified seagrass occurrence and density using in situ observations based on a random design that locates sampling points throughout the Loxahatchee River estuary. At each sampling point, a 9m2 collapsible quadrat was used to collect seagrass presence/absence within each 1m2 square of the 9m2 grid. Results from this project provide landscape-scale, species specific assessment of seagrasses in the estuary.
Parameters
seagrass presence, 2010 data includes Water depth (cm), predominant substrate type (much, sand, rock/shell, detritus), muck depth if present, Density (m2), acreage.
Notes
Program 3017 has quadrat level detailed seagrass data for some of the same areas within Loxahatchee starting after 2007. Abundance data for 2007, 2010 and 2018 converted to Percent Occurrence using the formula (x / 9) * 100 = percent occurrence..
Application
Publications
Start
2007
End
Current
Frequency
Periodic
Method
Landscape-scale Mapping Methods: performed while snorkeling. Quantifed seagrass presence or absence by deploying a 9m2 quadrat at each sample point. 2010 data includes water depth and seagrass density: visually estimated in cells where seagrass was present, using the following categories: (1) low density (< 5% coverage); (2) moderate density (> 5% but < 90% coverage); and (3) high density (= 90% coverage). 2007, 2010 and 2018 included abundance scores of 0-9 based on number of cells with seagrass present. 2018 and 2022 included Modified Braun-Blanquet scores.
Discontinuity
Data Location
https://loxahatcheeriver.org/river/seagrass/
Data Format
Shapefiles and raster data, excel
Habitats
Submerged Aquatic Vegetation
SEACAR Citation
Loxahatchee River District; Wildpine Ecological Laboratory. (2022). Loxahatchee River District Landscape-Scale Seagrass Mapping Area. Updated 02/14/2024. Distributed by: SEACAR Data Discovery Interface, Office of Resilience and Coastal Protection, Florida Department of Environmental Protection. https://data.florida-seacar.org/programs/details/10001
Alternative Citation

indicates priority attributes

Contacts
Jerry Metz

Loxahatchee River District · Wildpine Laboratory Technician/Researcher

Jerry.Metz@lrecd.org

Export Standardized Data

Habitat(s) : Indicator(s) Last Updated File Download
Submerged Aquatic Vegetation : Percent Cover 06/06/24 07:15 PM Download File - SAV - 10001.zip
Water Column : Water Quality, Water Clarity 06/06/24 07:15 PM Download File - Discrete WQ - 10001.zip
DIP Document N/A Download File - DIP

Office of Resilience and Coastal Protection Managed Areas

Jensen Beach to Jupiter Inlet, Loxahatchee River-Lake Worth Creek

Indicators

Indicator
Submerged Aquatic Vegetation - Percent Cover

Documentation and Data provided by program

File Type File Name Added On Details
Data 2010_SG_All_Pts_TableToExcel.xlsx 07/15/20 01:06 PM View Details
Data SG_species_07_all_points_TableToExcel.xlsx 07/15/20 01:06 PM View Details
GIS SeagrassData.zip 08/17/18 12:31 PM View Details
Protocols DSG-2009-2010 (1).pdf 08/17/18 12:31 PM View Details