Santa Rosa Portion of the Oyster Mapping and Assessment Project
Santa Rosa County R.E.S.T.O.R.E. has funded the SRC Oyster shell recycling program and the Pensacola, East and Blackwater Bays Intertidal and Subtidal Oyster Reef mapping and Assessment projects. The Nature Conservancy is managing the oyster reef mapping and assessment project and has contracted with MREC Environmental, LLC to get the work done.
The purpose of the project is to map and assess the condition of known and potential intertidal and subtidal oyster reef resources in the Santa Rosa County portion of the Pensacola Bay system. Results of this mapping project will establish a baseline of the existing locations and condition of oyster resources in SRC. This information will help to guide future restoration projects.
Subtidal oysters are harvested in clumps and are culled using a large knife or hatchet. Photo credit: Calvin Sullivan
Intertidal reefs are typically exposed at low tides and found along the shoreline of our bay system. Sub-tidal reefs are found under water. Gabe Johnson, owner of MREC Environmental has verified existing intertidal reefs using a jet-ski in the fall of 2020. Our bay system does not have as many natural intertidal reefs as in other parts of Florida. There are existing intertidal reefs that have been installed for shoreline protection and habitat enhancement.
Gabe Johnson and the crew of MREC Environmental are working to complete the initial bottom survey in early 2021. He has set up grids based on historic locations of oyster reefs throughout the Santa Rosa County portion of the Pensacola Bay system. He will then verify his findings by diving sites where oyster shell was found during the bottom survey.
From left to right: Dale, Gabe and Reese of MREC Environmental. Phot credit: Chris Verlinde
Side scan sonar and echosounder along the side of the boat. Photo Credit: Chris Verlinde
Gabe and his crew are using one Side Scan Sonar, an Edgetech 4125i to map images of the bottom. The other instrument they are using is a Singlebeam Hydrographic Echosounder (Teledyne Odom Echotrac CV100). The echosounder is used to collect water depth data and contours of the water bottom. The echosounder is connected to a transducer. The side scan sonar and the transducer from the ecosounder are placed along the side of the boat and submerged while the boat travels over the transects to collect the underwater images and parameters.
The pink lines are the transect lines of grid #25. Photo credit: Chris Verlinde
About two thirds of grid #25 are completed. Photo credit: Chris Verlinde
Dale dropping the pole to assess bottom characteristics. Photo credit: Chris Verlinde
On a cold day in December 2020, Gabe and his crew covered 149.3 acres in grid #25, just west of the power lines in East Bay. Grid 25 included 32 parallel transect lines (2468 feet long), spaced 100 feet apart. This grid was completed in approximately three and a half hours by running the boat along each transect and recording data. In addition to the electronic data, one of the crew members used a fiberglass pole to assess bottom conditions. Approximately, every 10 feet or so, the pole guy would lower the pole and shout the condition of the bottom, either sand, mud, or shell. Gabe then recorded the point and code on his mapping software.
Image from the side scan sonar showing a sand bottom. Photo credit: Chris Verlinde
Side scan image of bottom with showing potential shell (the darker scatter area). Photo credit: Chris Verlinde
The raw data will be compiled into maps and a report that will be used to based future oyster fishery and habitat enhancement restoration efforts in East, West and parts of Escambia Bay.
Black Skimmers foraging for fish. Photo Credit: Jan Trzepacz, Pelican Lane Arts.
Black Skimmers and Least Terns, state listed species of seabirds, have returned along the coastal areas of the northern Gulf of Mexico! These colorful, dynamic birds are fun to watch, which can be done without disturbing the them.
Shorebirds foraging. Photo Credit: Jan Trzepacz, Pelican Lane Arts.
Black Skimmer with a fish. Photo Credit: Jan Trzepacz, Pelican Lane Arts.
What is the difference between a seabird and shorebird?
Among other behaviors, their foraging habits are the easiest way to distinguish between the two. The seabirds depend on the open water to forage on fish and small invertebrates. The shorebirds are the camouflaged birds that can found along the shore, using their specialized beaks to poke in the sandy areas to forage for invertebrates.
Both seabirds and shorebirds nest on our local beaches, spoil islands, and artificial habitats such as gravel rooftops. Many of these birds are listed as endangered or threatened species by state and federal agencies.
Juvenile Black Skimmer learning to forage. Photo Credit: Jan Trzepacz, Pelican Lane Arts.
Adult black skimmers are easily identified by their long, black and orange bills, black upper body and white underside. They are most active in the early morning and evening while feeding. You can watch them swoop and skim along the water at many locations along the Gulf Coast. Watch for their tell-tale skimming as they skim the surface of the water with their beaks open, foraging for small fish and invertebrates. The lower mandible (beak) is longer than the upper mandible, this adaptation allows these birds to be efficient at catching their prey.
Least Tern “dive bombing” a Black Skimmer that is too close to the Least Tern nest. Photo Credit: Jan Trzepacz, Pelican Lane Arts.
Adult breeding least terns are much smaller birds with a white underside and a grey-upper body. Their bill is yellow, they have a white forehead and a black stripe across their eyes. Just above the tail feathers, there are two dark primary feathers that appear to look like a black tip at the back end of the bird. Terns feed by diving down to the water to grab their prey. They also use this “dive-bombing” technique to ward off predators, pets and humans from their nests, eggs and chicks.
Least Tern with chicks. Photo Credit: Jan Trzepacz, Pelican Lane Arts.
Both Black Skimmers and Least Terns nest in colonies, which means they nest with many other birds. Black skimmers and Least Terns nest in sandy areas along the beach. They create a “scrape” in the sand. The birds lay their eggs in the shallow depression, the eggs blend into the beach sand and are very hard to see by humans and predators. In order to avoid disturbing the birds when they are sitting on their nests, known nesting areas are temporarily roped off by Audubon and/or Florida Fish and Wildlife Conservation Commission (FWC) representatives. This is done to protect the birds while they are nesting, caring for the babies and as the babies begin to learn to fly and forage for themselves.
Threats to these beautiful acrobats include loss of habitat, which means less space for the birds to rest, nest and forage. Disturbances from human caused activities such as:
- walking through nesting grounds
- allowing pets to run off-leash in nesting areas
- feral cats and other predators
- driving on the beach
- fireworks and other loud noises
Audubon and FWC rope-off nesting areas to protect the birds, their eggs and chicks. These nesting areas have signage asking visitors to stay out of nesting zones, so the chicks have a better chance of surviving. When a bird is disturbed off their nest, there is increased vulnerability to predators, heat and the parents may not return to the nest.
Black Skimmer feeding a chick. Photo Credit: Jan Trzepacz, Pelican Lane Arts.
To observe these birds, stay a safe distance away, zoom in with a telescope, phone, camera or binoculars, you may see a fluffy little chick! Let’s all work to give the birds some space.
Special thanks to Jan Trzepacz of Pelican Lane Arts for the use of these beautiful photos.
To learn about the Audubon Shorebird program on Navarre Beach, FL check out the Relax on Navarre Beach Facebook webinar presentation by Caroline Stahala, Audubon Western Florida Panhandle Shorebird Program Coordinator:
In some areas these birds nest close to the road. These areas have temporarily reduced speed limits, please drive the speed limit to avoid hitting a chick. If you are interested in receiving a “chick magnet” for your car, to show you support bird conservation, please send an email to: email@example.com, Please put “chick magnet” in the subject line. Please allow 2 weeks to receive your magnet in the mail. Limited quantities available.
What’s the big deal about seagrasses?
Seagrass meadows are made up of plants that live under water in our local estuaries. Just like the grass and plants in our yards where many types of insects, worms and small animals live, seagrass meadows provide habitat for many types of young fish and invertebrates, such as crabs and shrimp.
Between 70 and 90% of fish, crabs and shrimp that recreational and commercial fishermen catch, spend some time during their life in seagrass beds. In 2014, the commercial fishing industry contributed nearly $140 million, while recreational fishing spending contributed $6 billion to Florida’s Economy. If we did not have healthy seagrasses, we would not have this economic impact on our coastal economies (http://gulffishinfo.org/Gulf-Fisheries-Economics).
· As seagrass blades move with the currents and tides, sediments are removed from the water, which contributes to improved water clarity.
· Seagrasses are the same type of plants that grow on land, they produce oxygen for marine life.
· Seagrasses filter excess nutrients from the water.
· Provide food and shelter for juvenile fish, shrimp and crabs.
· Endangered species such as manatees and green sea turtles depend on seagrass beds for food.
· Migratory birds depend on seagrass beds for foraging needs.
What can you do to help protect seagrasses?
• Avoid seagrass beds. If you do run aground in a seagrass bed, turn off your engine, tilt up the engine and walk or pole your boat out of the shallow water.
• Be safe and know water depths and locations of seagrass beds by studying navigational charts.
• Seagrasses are usually found in shallow water and appear as dark spots or patches. Wear polarized sunglasses (to reduce glare) to help locate these areas.
• Always choose to use a pump-out station for your marine sanitation device.
• Stay in marked channels.
• To reduce pollution from entering our waterways, keep a buffer of native plants along your shoreline. This will also help to protect your property from erosion and slow flood waters during storm events.
• To save money, plant native plants that don’t require a lot of fertilizers and pesticides. Avoid seagrass beds when planning for dredging activities or pier construction.
• Comply with Shoreline Protection construction codes
• Maintain septic tanks.
In your community:
• Families and children can get out and snorkel these areas! Many sites are easy to access from public parks.
• Get involved with local organizations that promote nature protection.
• Working together, we can share with community members what we have learned about seagrasses at the 20th annual Seagrass Awareness Celebration, March 6, 2020 from noon until 4 pm at Shoreline Park South in Gulf Breeze Fl.
• Don’t litter!
The scarring of seagrass but a propeller.
As the heat indicies rise, there a number of organizations that offer great learning experiences about our local Natural Resources!! While it is great to have the outdoor hands-on learning, the afternoon heat can feel suffocating. Here are a couple of nature centers that you can visit to get out of the heat.
Apalachicola National Estuarine Research Reserve is home to the Reserve’s Nature Center, located at 108 Island Drive, in East Point Florida. Inside the air-conditioned Nature Center are many interactive displays and tanks with live local animals. At one end of the center, there is a large mural that takes you from the upper-parts of the Apalachicola River to the Gulf of Mexico, There are many native animals identified on the mural. There is an area with plenty of artifacts to keep the young and old naturalist busy.
The interactive cultural displays are really interesting and provide much information about the fishing industry that Apalachicola is known for throughout Florida.
The Reserve features a many trails that lead throughout the property and many to the water. The Apalachicola National Estuary Reserve is one of 29 National Estuarine Research Reserves in the U.S. Each reserve is protected for “long-term research, water quality and habitat monitoring, education, and coastal stewardship.”
The Reserve is open to the public Tuesday through Saturday from 9 am until 4 pm, admission is free.
Photos provided by Chris VerlindeHeading to the west, near the town of Freeport Florida, you will find the E.O. Wilson Biophilia Nature Center. This amazing place will keep you and your family entertained for hours. If you plan to go, the center is only open to the public on Thursday and Friday during June and July from 9 am until 2 pm. The cost is $8.00 for adults, $5.00 for children ages 3-12 and free for those 2 and under. The rest of the year, the staff are dedicated to teaching local students from surrounding school districts about biodiversity in Northwest Florida. As you enter the exhibit building there is a tribute to the famous naturalist E.O Wilson, whose work is the inspiration for center. Dr. Wilson is dedicated to teaching others about the importance of conservation of biodiversity. He coined the term “biophilia” which means “the love of all living things.” The exhibit hall features many different displays on the cultural and natural resources in the area. The center features a reptile room, classrooms, an amphitheater, porches to enjoy your lunch and the “World of Wonder Exhibit.” which is a Science on a Sphere – a giant globe that utilizes technology to teach about the planets, our weather, and more.
Animals that can be found at the center include: birds of prey, bobcats, turtles and snakes, a red-cockaded woodpecker, a fox, and chickens. A short walk outside, you will find an authentic cracker house (with snakes!) and an organic garden.
The E.O. Wilson Biophilia center is a wonderful place to visit, check it out soon!!
Photo Credit: Mike Sandler
Join the UF/IFAS Natural Resource Extension Agents as we explore the Navarre Beach Marine Sanctuary.
Thursday, August 17, 2017 from 9 am until 1 pm.
Register today at: https://nbsnorkel.eventbrite.com
The Navarre Beach Marine Sanctuary consists of 30 reef structures in the Gulf of Mexico. The whole site is as large as a football field. Reefs are located in 6 to 15 feet of water.
Participants will enjoy a brief introduction about the history of the reefs and economic impacts for the community. We will then head out to snorkel the reefs and observe the wildlife that can found in the area.
Participants will be expected to swim at least 375 feet to access the site and be experienced swimmers/snorkelers. Participants may see marine life such as: sea turtles, octopi and many fish species that inhabit the reef. Participants will need to bring a mask, snorkel and fins, flotation device such as a boogie board or a buoyancy compensator vest, sunscreen, etc. Cost is $20.00, lunch is included.
We will meet at the Sea Oat Pavilion which is at the second Gulf side parking lot in the NB Marine Park. There are picnic tables, restrooms, changing area and shower at the Pavilion.
This adventure is weather dependent, refunds (minus the Eventbrite fee) will be provided if we have to cancel due to inclement weather conditions or poor water visibility. If you have questions, please contact Chris Verlinde, 850-623-3868 or firstname.lastname@example.org.