Tampa Bay
Estimating the Deep Edge of Seagrass Beds
Type: Extent of habitat (i.e., area of habitat and whether
there has been a decline); condition of habitat and sources affecting
habitat (i.e., the condition or functionality of the habitat); and stressors
affecting habitat (i.e., which sources have contributed to its degradation and
whether they are direct or indirect factors).
Category: Submerged
Cost:$ 25,000 for methods of development and initial year of data collection
Description: This measurement technique, developed by Roger Johansson
(City of Tampa), uses Trimble survey techniques benchmarked to USGS survey markers
and GPS technology to estimate true depth (as benchmarked to MLLW) at the seagrass
bed edges. Light measurements and depth at the deep edges of the seagrass beds
are important inputs into the empirical model estimating nitrogen loading, chlorphyll
A response, and light needed for seagrass growth and reproduction. To date,
there has not been adequate measurement of the depth of the deep seagrass beds
in Tampa Bay.
Outcome: The outcome from these measurements will allow for more accurate
model inputs, resulting in better estimates of loading needed to support restoration
of seagrasses in historic depths.
Contact: Roger Johansson, City of Tampa Bay Study Group (roger.Johansson@ci.tampa.fl.us).
Citation: Water Depth (MTL) at the Deep Edge of Seagrass Meadows in
Tampa Bay Measured by Differential GP Phase Processing: Evaluation of the Technique,”
2000, Technical Report #05-00, Tampa Bay Estuary Program, prepared by City of
Tampa Bay Study Group (J.O.R. Johansson).
|
