Tagging Wildlife Part 1 – Introduction

Tagging Wildlife Part 1 – Introduction

Recently I attended a workshop on wildlife tagging projects.  Researchers from across the Gulf of Mexico who had projects going on in the northern Gulf were invited to present their updates.  I was there to help present what we have learned about diamondback terrapins but there were numerous other talks, and the results were fascinating.  Fascinating enough that I thought the public would be interested in them as well.  Most of the presentations were on fish or reptiles, but the fish included interesting species such as whale sharks, tiger sharks, cobia, and tarpon.  So, I am going to run a series of posts on the different species along with another series on barrier island wildlife. 

I thought I would start with an introduction on the methods of wildlife tagging and why scientists tag animals.  Some of the reasons may seem obvious, but with today’s modern tags, there is a lot of information scientists can gain from doing this. 

Why do they tag?

With the types of tags they used when I was in school there were a few things that you could learn.  (1) How far do the animals range, (2) how fast they reached those locations, (3) some idea of live longevity – you at least knew how long they were “at freedom”.  With these data you could get a better idea of what their habitat range was and how they used the habitat.  Some, like blue sharks, may move great distances all year long.  Others, like nurse sharks, may not move more than a few miles from the point where they were tagged.  Others may move seasonally, spending summer in one region and winter in another.  All of these data are useful to resource managers responsible for maintaining the species population.

With the more modern electronic tags, they can learn such things as how deep they dive, how long they stay at depth, what water temperatures they may frequent, what salinity they prefer, and let you know where the animal is at any given moment in time.  Today’s tags are pretty amazing. 

This tag is similar to the ones we used in the 1980s on sharks. They provide a number for individual identification. Ours also had a capsule with a note on water resistant paper. Photo: Hallprint.

How do they tag?

Well… step one to answering this question is HOW DO YOU CATCH THE ANIMAL? – not as easy as you think.  Whale sharks and leatherback sea turtles are quite a handful.  If your target species is something like a white shark, tiger shark, diamondback rattlesnake, there is an extra danger added.  As you plan a method for your safety, you must also plan a method for their safety.  The objective is not harm or kill the creature – you will learn nothing from this.  When I began my career, I saw a program on how they tagged polar bears in the 1980s.  They would fly over the ice in a helicopter looking for the bears.  When the bears saw the helicopter, they would run for the safety of water.  The scientist would try to shoot a dart into the animal to put it asleep long enough to get a tag on it.  BUT if you overdosed the bear, and it made it to the water, it could drown.  So, from the air, they had to gauge the weight of the bear, guess what amount of the drug to shoot, and hope they were right.  If the bear did fall asleep, how “asleep was it?  Did you give ENOUGH drug?  Polar bears can be very dangerous.  In the episode I watched the bear was asleep, but the researchers did mention that they will “play sleep” and you need to be ready.  Such was the world of wildlife tagging 40 years ago. 

One of the things that was also discussed when I was in school was what type of tag you were going to place on the animal.  They did not have the neat tools they have now.  Most tags had a capsule with a piece of paper, sometimes written in multiple languages, to call said person and report where and when they found the animal.  There was usually a monetary award for doing so, or sometimes a hat or T-shirt.  I remember the hat you got for reporting a tagged redfish was really neat, but I never caught a tagged one. 

You did not want to place a tag that would alter the natural behavior of the animal.  In the case of the polar bear, they would place an ear tag and paint a large number on its side in black paint.  This made sense from the biologist’s side – flying over the ice you could see the large black “3” on a bear and know the individual.  But that large black number could also be seen by their prey.  Not good.  I saw researchers painting the shells of gopher tortoises with all sorts of neon colors to make detection by them easier, but easier for their predators as well. 

Radio tagging was used 40 years ago.  This involves capturing the animal (as we have already seen – fun in itself), putting it asleep and attaching/inserting a radio tag.  This tag provides a radio signal that can be detected by a receiver carried by the research holding an antenna walking/driving around following the animal.  You had to be within range to hear the signal and – honestly – good at detecting the signal.  Some researchers were better at this than others.  As you can imagine this was only as good as your ability to keep up with the animal.  At some point your car/boat would need fuel, or the animal crossed a river you could not.  It provided some good data, but there were limits. 

Today modern tags have solved a lot of these issues.  Some new tags do not have typed notes but sensors that can detect the elevation/depth, temperature/salinity, all sorts of information that was unknown in my college days.  These tags can be retrieved and downloaded on a computer to give a much better idea of how the animal spends its time and what it seeks. 

This modern shark tag could provide additional information such as diving depth, water temperature, and more.

Satellite tags work well for creatures who surface frequently – sea turtles, whales, whale sharks.  Satellites can detect them, and you can follow their movements/habitat preferences as they are actually using them. 

For species at depth, like some sharks, cobia, tarpon, etc. there are now acoustic tags.  The tag emits a signal that is detected by an array of receivers the researchers place in the environment.  As the animal passes within range of the receiver it is detected, and the downloaded data gives a similar picture of how the animal uses the environment.  A couple of neat things about acoustic tags are that (a) you can track satellite tagged animals while they are diving, and (b) your receivers can detect other species tagged by other researchers and let them know where their creature was.  This was one reason for the workshop – so, everyone could meet everyone else and know who has tagged what and how to share information. 

No tag is permanent.  All are designed to fall off.  Battery power will eventually fail.  But no animal is stuck with this all of their lives as they could have been when I was in school.  In future articles we will look at the results of some of these studies. 

This tag with an antenna can be detected by a satellite and tracked real time. Photo: USGS
El Nino and This Winter Cold

El Nino and This Winter Cold

I am sure everyone has noticed how cold this winter has been.  We have had multiple days in the 20’s here in the Florida panhandle, even some snow flurries near Pensacola.  I was first told this may happen by a Sea Grant colleague of mine who works with oyster farmers.  Six months ago, he said the Farmer’s Almanac mentioned this would be a colder than normal winter.  A few weeks later a Master Naturalist mentioned that if it was heavy “mast season” (lots of acorns on the ground) it would be a colder winter.  We certainly had a heavy mast season in Pensacola this year, acorns were EVERYWHERE.  And here we are.  As I type this it is 27°F outside. 

Though we do not see snow as often as Colorado, the panhandle does see snow from time to time. Photo: Rick O’Connor

This past week I was at a Sea Grant meeting.  We were discussing this cold and another colleague mentioned that it was an El Nino year.  That’s right… it is an El Nino year, and many know that the weather does change when this occurs. 

I first heard of the El Nino shortly after receiving my bachelor’s degree.  I was teaching at Dauphin Island Sea Lab, and we had a video series on oceanography and one episode discussed it.  It explained that commercial fishermen in Peru were the first to notice it over a century ago. 

Off Peru’s coast is a large ocean current that originates in the Antarctic, flows north towards the equator passing the west coast of South America along the way.  The water is cold and full of life.  The Andes Mountains also run north-south along the coast.  Cold air at the top of the mountains runs down towards the coast and offshore.  As it blows offshore, it “pushes” the surface water of the ocean offshore as well.  This generates an upwelling current moving from the ocean floor towards the surface, bringing with it nutrients from the sediments below.  This nutrient reach seawater, mixing with the highly oxygenated cold water, and the sun at the surface creates the perfect environment for a plankton bloom, and a large bloom she is.  This large bloom attracts many plankton feeding organisms, including the commercially sought after anchovies and sardines.  This in turn supports the tuna fishery that comes to feed on the small fish.  These are some of the most productive fisheries on the planet.

Based on records kept by Peruvian fishermen, every three to seven years the surface waters would warm, and the fish would go away.  It was lean times for them.  When it did occur, it would do so around Christmas time.  So, the fishermen referred to it as the El Nino – “the child”. 

Based on the video episode we showed the students, others began to notice warming along the western Pacific and realized it was a not a local event, but a global one.  A high school friend of mine does sound for nature films and one of his first projects was to video the effects of the El Nino on the seal nesting season in California.  As in Peru, the cold waters become warm, the bloom slows and the fish go away, with less fish the mother seals have no food so, cannot produce milk for their newborns waiting on the beach.  As horrible as it sounds, and was to watch in Mike’s film, the mothers eventually abandon the newborns to starve. 

The video we showed at Sea Lab followed marine biologists studying corals along the western coast of Central America.  Here the waters were warming as well, warmer than normal, and the corals were stressed and dying.  With orbiting satellites now in place oceanographers were able to view this event from space and watch the entire thing unfold.  These images showed that during a normal year the western Pacific had cold water along California and much of South America.  The waters along western Central America were warm.  But during an El Nino year, warm water replaced the cold, particularly near Peru.  Scientists were able to connect several events to El Nino seasons.  Increases in wildfires in the western US, people were viewing the northern lights at lower latitudes, droughts occurred where it was usually wet, floods occurred where it was usually dry, and during one El Nino season the Atlanta Falcons made it to the NFL playoffs.  Weird things were happening. 

The obvious question for science is what drives these El Nino events? 

It is understood that our weather and climate are driven by ocean currents.  The “dry air” everyone talks about in the western US is driven by the cold California Current.  Likewise, the “humid air” of the southeastern US is driven by the warm Gulf Stream.  If you alter these currents, you alter the weather and climate of the region.  How do you alter ocean currents? 

Warm water in the eastern Pacific indicates an El Nino season. Graphic: NOAA

In the 1980s, when I was teaching at Dauphin Island Sea Lab, the video suggested a connection to sunspots on the surface of the sun.  At the time, they were not sure whether the increased sunspot activity triggered the El Nino, or whether there was something else going on, but there was a correlation between the two. 

One explanation comes from a textbook on oceanography I used when I was teaching marine science during the 1990s1.  It explains the event as such…

  • During “normal years” cold water from the Arctic and Antarctic runs along the western coasts of North and South America – both heading towards the equator.  Once there, the earth’ rotation moves this water westward towards Australia and Indonesia, warming the water as it goes. 
  • Apparently, the ocean currents cannot transport and disperse these warm waters effectively once they reach the western Pacific.  Thus, warm water begins to build there. 
  • This accumulating warm water seems to reverse the trade winds that normally flow from the eastern Pacific to the western along the equator.  This wind reversal occurs between November and April.  It mentions that in the late 1990s the cause of this wind reversal was not well understood.   
  • This wind reversal is often followed by the development of twin “super typhoons” (very strong typhoons) north and south of the equator. 
  • The extreme warm water in the western Pacific affects the weather in the region and this “heat mass” expands spatially.  During this expansion, the high-pressure system that sits over the eastern Pacific, bringing them the dry air we know California for, weakens.  At the same time, the normal low-pressure system over the western Pacific weakens and, in a sense, things are flipped.  This atmospheric change is called the Southern Oscillation, and the entire event was termed the El Nino Southern Oscillation (ENSO)
  • The power of the typhoons moves warm water from the western Pacific across the equator to the America’s.  The waters there warm and the historic El Nino occurs.  This movement takes several months. 
  • The El Nino will persist for one to two years.  When the warm water eventually releases its heat, the waters cool, and normal conditions return.  Until the next El Nino forms. 
  • In the 1990s they had already noticed an increase in the frequency of El Ninos (based on old fishermen’s logs).  They suggest climate change may be driving this. 
  • During El Nino years weather patterns change globally, as mentioned above.  This altering of the weather impacts all sorts of biological processes, as mentioned above. 
  • Often, the “return” of colder water along the western Pacific “overshoots” normal temperatures and the ocean becomes colder than normal.  This has been termed the La Nina.

I kind of imagine the whole process like a sloshing pool of water flowing towards one end of the pool, bouncing off and sloshing back to the other.  But instead of water “sloshing around” it is temperatures. 

But this was 1996.  Have scientists learned anymore about this event?

Not much has changed in their explanation, other than we are much better at predicting when they will happen and alert the public so that farmers, fishermen, fire fighters, etc.  are prepared.  They do seem to be increasing in frequency. 

For the 2024 El Nino, which NOAA began alerting the public in the summer of 2023, they are predicting it to continue for several seasons2.  There is no doubt that this winter is colder than normal.  The Florida panhandle also experienced a drought this past fall.  But… during most El Nino years, hurricanes are few in the Gulf of Mexico.  We will see, and watch, how the rest of the year rolls out.

Reference

1 Gross, M.G., Gross, E. 1996. Oceanography; A View of Earth. 7th edition.  Prentice Hall.  Upper Saddle River, New Jersey.  Pp 472.   

2 El Nino / Southern Oscillation (ENSO) Diagnostic Discussion. Jan 11, 2024. National Weather Service Climate Prediction Center.  National Oceanic and Atmospheric Association.

https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/ensodisc.shtml.

Winter Wildlife Part 1

Winter Wildlife Part 1

One of the programs I do with Florida Sea Grant is Restoring a Healthy Estuary.  There are four focus areas within this program: improving water quality, restoring habitat, managing invasive species, and enhancing wildlife.  For those who know me, they know that enhancing wildlife is near and dear to me.  My major in college was vertebrate zoology and I have been monitoring and teaching about vertebrates for 40 years. 

I have found that the articles I write on this topic are my most popular, particularly snakes.  And I get that.  Whether you love them or hate them, snakes are interesting to read about.  As we roll into 2024, I thought I would do a series of articles on vertebrates I encounter as I conduct hikes/surveys on our barrier islands.  From a biogeographic view, barrier islands are interesting in understanding first, how some of the animals reached the island, and second, how they survive in a sandy/dry environment that is in many ways similar to deserts. 

The white quartz sand beaches of the barrier island in the northern Gulf of Mexico. Photo: Molly O’Connor

My first hike was just after the new year on the western end of Santa Rosa Island.  Wintertime is cold and the ectothermic vertebrates (amphibians and reptiles) are hard to find, most going dormant this time of year.  But, on sunny days when the wind is low, they can find places where they bask and stay warm.  If you encounter them, they will most likely not move quickly (they are still cold) and this provides a better opportunity to view them, though their coloration is very cryptic with the environment and, with little motion, you may miss them.  For the endothermic vertebrates (birds and mammals) this is their time. 

On this warmer sunny January day, we spent several hours out.  There was not much movement other than a variety of songbirds.  Then we heard rustling in the woods under some live oak trees – it was an armadillo.

The common nine banded armadillo scurrying across the lawn. Photo: Les Harrison

Many of us have encountered this interesting mammal.  You may not have recognized it as mammal, but it is.  As a lifelong resident of Pensacola, I know that prior to Hurricane Ivan there were fewer armadillos on Pensacola Beach.  They were there but in low numbers.  What was common at that time were striped skunks.  Since Ivan I have not seen a skunk.  I have asked park rangers at the Gulf Island National Seashore, and they have not seen them either.  But the number of armadillos immediately increased.  It seems the skunk left a niche open, and this animal took it.  Some say the armadillo may have increased in population whether the skunks were there or not – that is just armadillos.  So, who is this “new kid on the block” that has become so common on our islands?

Armadillos are native to central and south America.  They are a smaller mammal in the Order Cingulata and related to anteaters and sloths.  Mammals are divided into orders based on their dental formula (what type, and how many teeth they have).  In this sense armadillos are unique.  They have around 30 peg like teeth which they use to feed on insects, their larva, arachnids, snails, small vertebrates, and eggs – though reports of them raiding shorebird nests are rare.  They do eat cockroaches, which many people appreciate.  They acquire their food by digging into loose soil with their large claws.  This is one reason they do so well on our beaches and why many homeowners dislike them – they can destroy a yard to find prey.  Though they have poor eye site and hearing, which is noticeable when you encounter one, they have an excellent sense of smell. 

Armadillos move relatively slowly seeking prey but when disturbed they can run quickly and swim well.  They dig round burrows, which I have found many on Santa Rosa Island.  Because they often share habitats with gopher tortoises, the burrows are often confused.  Armadillo burrows differ in that they are completely round.  With gopher tortoises the entrance is usually flat across the bottom and dome shaped across the top.  Armadillos usually spend the daytime in these burrows, foraging at night with more activity near dawn and dusk (crepuscular). 

One secret to their success is their reproductive rate.  They breed in summer but hold off development of the embryo to allow a late winter birth.  They only have one litter each year but is almost always four identical young of the same sex.  This is because they develop from the same fertilized egg. 

Diseases and parasites in armadillos are few compared to native mammals, rabies has not been documented. Leprosy has been documented in armadillos in Texas, Louisiana and Mississippi, but there have been no reports of infected ones in Florida.

The dispersal of armadillos from central to north America most likely occurred crossing the isthmus in Panama.  But there are reports of the animals being released in eastern Florida beginning in the 1920s.  It was noted that they were able to cross the Mississippi River in the 1920s when people began to build bridges for this new thing called the automobile.  Eventually the Florida and Texas populations merged.  They are dispersing north towards the Ohio Valley but are not fans of cold weather and this has been a barrier for further dispersal north.  We will see what climate change will do to their range.  They most likely reached our barrier islands by crossing bridges, though there are locations where the Intracoastal Waterway is narrow enough, and dredge spoil island frequent enough, they could have swam/island hoped their way over.  Either way they are here. 

Many dislike this creature and would like to see them gone.  Some consider it an invasive species and needs to be managed.  Others find them cool and enjoy seeing them.  It was the only non-bird creature moving that day, despite the warmer weather, we will see what the next hike/survey will bring. 

Reference

Schaefer, J.M., Hostetler, M. 2021. The Nine-Banded Armadillo (Dasypus novemcinctus). University of Florida EDIS Publication. https://edis.ifas.ufl.edu/publication/UW082.

What Can We Do in 2024 to Improve Water Quality in Local Waterways

What Can We Do in 2024 to Improve Water Quality in Local Waterways

When I was hired with Florida Sea Grant, I developed an advisory committee who represented a variety of stakeholder interest in the Pensacola Bay area.  I asked the committee to list their top three concerns or issues with the local marine environment so that I could have a start on where I would focus my education programs.  I was expecting a variety of answers, but all of them wrote water quality. 

Each October I send a survey to those who have read one of my articles, or attended one of my programs to see what behavior changes they may have made to improve the health of the bay and I ask them which topics should be the focus for the upcoming year.  Water quality is always on that list and is usually the first.  2024, was no different, water quality remains the number one topic. 

Local bayous in the Pensacola Bay area have experienced fish kills due excessive nutrients in the past. The Lakewatch Program trains volunteers to monitor nutrients in these waterways today. Photo: Rick O’Connor

There are numerous issues that impact our water quality.  In a 2016 EPA publication, Dr. Mike Lewis (et.al.) discussed a variety of environmental concerns that had impacted the Pensacola Bay System1.  Between pages 23-86 of this 145-page document the topic of water quality is discussed.  Topics include what contaminants we discharge into the waterways, ground water quality, surface water quality, sediment quality, bioaccumulation, and the risk these contaminants have on estuarine fish and wildlife, as well as humans.  The contaminants reach our waters using a variety of ways including the atmosphere, ground water, tributaries, municipal and industrial wastewater, and stormwater runoff.   With a variety of issues at hand, I asked my advisory committee for advice on prioritizing these issues.  Surface water quality rose to the top and I began our program here. 

Surface waters have issues such as eutrophication (excess nutrients triggering algal blooms which trigger low dissolved oxygen which trigger fish kills), chemical contamination of sediments, water clarity due to increase sediments, fecal bacteria, PAHs, pesticides, PCBs, and others.  Many of these have been monitored for decades.  Surface water quality in the Pensacola Bay System was reported as fair in 1992, in need of improvement in 1998, and good – 30% good in 2005.  Though things are improving there is still much to do. 

So… what can YOU do the help?

Historically rainwater fell on the land and water of the Pensacola Bay region.  The water that fell on the land either percolated through the sediments to recharge the ground water, or – if it was a form of sediment that reduced percolation rates, formed surface water that recharged the bay (streams, creeks, and rivers).  With the increase in development there came an increase in impervious surfaces for water to percolate, and flooding of streets and communities became a problem.  Communities began to develop methods of moving this stormwater into our properties and into the area waterways.  Early the method was nothing more than discharge pipes directly into these waterways.  More recently stormwater ponds, diverting to marshes, and other methods have been used.  This has become an increasing problem with the high densities developments we are seeing now. 

Stormwater conveyance in Santa Rosa and Escambia counties. Photo: Matt Deitch

Solving this problem often falls on the city and county governments to develop ordinances to properly manage stormwater and abide by state and federal mandates.  Each year, UF IFAS Extension offers a district wide workshop focused on new methods of handling stormwater.  This year Part 1 of the workshop will be held on May 1, Part 2 on May 15.  If you are with a city/county municipality and are interested in attending either in-person or virtually, contact your local extension office for more information.  But there are things that private homeowners and businesses can do as well. 

Everyone who lives in the Florida panhandle can expect rain and a lot of it.  Over the last decade Pensacola has averaged around 70 inches annually.  What are you going to do with the rainwater that falls on your property?  In many cases there are designs for it to run off your property and contribute to the stormwater issue.  However, there are ways to hold on to that rainwater and use it for good.  If you have gutters you can place rain barrels at the down spouts.  This water could then be used to irrigate your landscape using drip irrigation methods.  You could create a rain garden.  These are low areas on the property where rainwater is directed.  You can then landscape these with plants that can tolerate wetter conditions and make it look attractive.  You can also use previous materials for your sidewalks, patios, and even your driveway.  Pervious materials will allow rainwater to percolate through reaching the ground and avoid running off towards storm drains. 

Rain barrels can be used to capture rainwater and avoid run-off.
Rain garden at the VA Central Western Massachusetts Health Care System facility. Photo: US Air Force

You could landscape your yard using the UF IFAS Florida Friendly Landscaping principles.  Following the nine principles of this program will help reduce the need for fertilizers, pesticides, and water usage itself.  Not only does this reduce irrigation water becoming part of the stormwater, but it also reduces some of the chemical pollutants that contribute to poor water quality as well.  It also saves the property owner money.

Health advisories issued due to high levels of fecal bacteria are problems in many local waterways.  Poorly maintained septic and sewer systems are a major cause of this.  If you own a septic system, you need to develop a maintenance plan and follow it.  If you are not sure how to do this, contact your county extension office for assistance. 

A conventional septic system is composed of a septic tank and a drainfield, where most of the wastewater treatment takes place. Image: US EPA

Though less maintenance is needed if you are on sewer system, there are still things you need to do to help reduce sanitary sewage overflows (SSOs).  One is to watch what you pour down the drain.  Fats, oils, grease, and even milk can solidify and block the flow of your sewage, and lead to SSOs.  In Escambia County the Emerald Coast Utility Authority (ECUA) offers a program they call FOG.  This program provides free containers where you pour your fats, oils, and grease.  When full, they can be exchanged for a new container, this reduces the frequency of SSOs and ECUA will use these oils as a biofuel at their reclamation center.  There may be a similar program in your community.  Another practice you could adopt is to check the lateral sewer lines connecting your house to the main sewer line under the street.  These lateral lines are the responsibility of the homeowner and can become clogged or cracked releasing untreated sewage into the environment. 

1-gallon container provided free to dispose of your oil and grease. Photo: Rick O’Connor

If you are a waterfront property owner, you might consider planting a living shoreline.  These natural shorelines not only reduce the erosion of your property, but they also provide habitat that enhances fisheries, and the marsh plants are good at absorbing/trapping sediments and pollutants that may runoff your property.  If you would like to learn more about how to have a living shoreline planted, contact your county extension office. 

FDEP planting a living shoreline on Bayou Texar in Pensacola. Photo: FDEP

Keep in mind that the suggestions mentioned above work as well for businesses as they do for homeowners. 

It is understood that water quality is a large concern for many in the Florida panhandle.  Though things are improving in some areas, there is more that can be done.  There are things YOU can do to help reduce this problem.  Hopefully some of you will adopt some of the practices in 2024 and let us know if you do.  If you have questions about any of them, contact your local county extension office. 

Reference

1 Lewis, Michael, J. Taylor Kirschenfeld, and Traci Goodhart. Environmental Quality of the Pensacola Bay System: Retrospective Review for Future Resource Management and Rehabilitation. U.S. Environmental Protection Agency, Gulf Breeze, Florida, EPA/600/R-16/169, 2016.

We Did It; In 2023 Less Than 30% of the Fecal Bacteria Samples Collected in the Pensacola Bay Area Required a Health Advisory

We Did It; In 2023 Less Than 30% of the Fecal Bacteria Samples Collected in the Pensacola Bay Area Required a Health Advisory

Health advisories issued by the Department of Health (DOH) due to high levels of fecal bacteria have been a problem for some parts of the Pensacola Bay system for decades.  Though most of the samples collected near our beaches rarely require them (usually between 0-5%) the bayous near downtown have been at, or above, 30% of the samples.  Bayou Chico is often between 50-60% of the samples.  Fecal bacteria have been such a problem in Bayou Chico that it was required to adopt a state Basin Management Action Plan (BMAP) to rectify the problem.   

Closed due to bacteria. Photo: Rick O’Connor

I began following the health advisory reports provided by DOH’s Healthy Beaches Program in 2012.  As mentioned above, swimming beaches near our islands rarely have health advisories issued.  The problem was with the three bayous near downtown.  In 2012 all three consistently reported 30%, or more, of their samples required an advisory to be issued. 

To rectify the problem the city and county have been doing a lot of work replacing old infrastructure that allowed sewage to leak from pipes or reach surface waters through sanitary sewage overflows.  Many communities around these bayous are converting from old septic systems to sewer, the communities around Bayou Texar are now all on sewer.  These same efforts are occurring along the north shore of Bayou Grande, and in neighborhoods around Bayou Chico.  Between 2012 and the present, I have seen the frequency of health advisories decline some.  Bayou Texar hovers around 30%, some years they are below, others above the mark.  In recent years Bayou Grande has consistently been between 25-30%.  Bayou Chico has declined some but is usually at or above 30%. 

In 2023, for the first time since I began following this, all 13 sites monitored in Escambia County were below 30%. 

2023

Body of WaterNumber of samples takenPercent of samples requiring an advisory
Bayou Texar4522
Bayou Grande1822
Bayou Chico1921
Bruce Beach469
Big Lagoon State Park195
Sanders Beach464
Casino Beach180
Park East180
Park West180
Quietwater Beach180
Ft. Pickens70
Johnson’s Beach70
Opal Beach70

It is worth noting that our rainfall was low this year as well.  Historically, Pensacola received 60-61 inches of rain a year.  Over the last decade this has increased to 70-71 inches.  The current rainfall total for 2023 is 58 inches.  Many studies show a strong correlation between rainfall and the number of advisories issued.  It may very well be that the reduction in rainfall played a large part in the reduction of health advisories.  Despite a lot of progress repairing infrastructure, and this effort needs to continue, there are still some issues. 

Along with the city and county retrofitting old infrastructure, there are things area residents can do as well.

  • Many of these are related to poorly maintained septic systems throughout the area.  If you are a septic system owner and would like to learn more on how to properly maintain your septic system, contact your county extension office. 
  • If you are a septic system owner and are interested in converting to sewer to reduce the need for maintenance, contact our county extension office.  For some communities in the Pensacola area, there is a cost share program with DOH to help make this conversion. 
  • If you are on a sewer system in one of the older parts of town, the pipe leaving your house and connecting to the line under the street is your responsibility and may need repairing or replacing.  Many plumbing companies have a television scope that can examine this line and provide you feedback. 
  • For everyone, be careful what your pour down the drain.  Fats, Oils, Grease, and even milk can clog the pipes and cause sanitary sewage overflows or backups in the system.  Heavy rains only make this worse.  In the Pensacola area the Emerald Coast Utilities Authority (ECUA) provides free plastic gallon jugs to place your cooking oil and grease in and, when full, can be swapped for another at several locations around town.  To find the closest disposal site to you visit https://ecua.fl.gov/live-green/fats-oils-grease.
The FOG gallon containers are found in these metal cabinets placed around the county. Photo: Rick O’Connor

Despite low rainfall this year, it is still good that all 13 sites were below 30% this year.  With the help of the local governments, agencies, and residents, hopefully it will remain so. 

The information provided here can be used by communities all along the Florida panhandle.  High fecal bacteria count, and health advisories are not limited to the Pensacola Bay System.  Contact your county extension office for more information on how you can help to reduce health advisories in your area.