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Algal Diversity and Ecology

• Dr. Dale Casamatta
  Although most are individually invisible to the naked eye, it’s hard to overlook the influence that algae has on the world.  For example, as the great architects of the Earth’s atmosphere, algae were and are responsible for producing most of the oxygen that makes the Earth’s atmosphere suitable for our survival.  Algae are also important sources of food, medicines, and other helpful products.  On the other hand, algae can also be problematic for human populations, especially in Florida where algal blooms regularly occur and can lead to choked waterways, fish kills, and human respiratory problems.  ¾ÅÉ«ÊÓƵ Coastal and Marine Biology faculty study both the diversity of algae and the manner in which they respond to environmental factors, information critical for a more complete understanding of a group often called the most important organisms on Earth.

Coral and Seagrass Stress and Health

• Dr. Cliff Ross
  Coral reefs and seagrass beds are diverse and productive ecosystems that many marine organisms depend on for food and shelter.  They also have great economic value.  However, these habitats are increasingly threatened by a variety of local and global stressors such as algal blooms, overfishing, disease, ocean acidification and climate change.  ¾ÅÉ«ÊÓƵ Coastal and Marine Biology faculty are currently studying the effects of stressors such as toxic algae, temperature change, and disease on coral and seagrass health with the ultimate goal of conserving these critical habitats.

Dolphin Behavior and Ecology

• Dr. Quincy Gibson
  The estuarine waters of the St. John’s River in Jacksonville, FL provides critical habitat for Atlantic bottlenose dolphins (Tursiops truncatus).  However, this population has not been well studied historically and is increasingly threatened by the high degree of human activity in this portion of the river.  Since 2011, ¾ÅÉ«ÊÓƵ Coastal and Marine Biology faculty have conducted photo-identification and behavioral surveys of dolphins in the St. Johns River with the goals of learning more about these animals and assessing the overall impact of human activities on their health and well-being.

Oyster Restoration

• POSH
  Due to heavy boat traffic and dredging, some areas of Jacksonville have experienced shoreline loss of several feet per year. Started in 2021, ¾ÅÉ«ÊÓƵ constructed POSH (Pervious Oyster Shell Habitats) have been deployed to significantly reduce wave and current energy on unstable shorelines and promote the seeding of oyster reefs. Initial findings were significant in reduction of energy allowing for sediment accretion behind the units. POSH units use recycled oyster shells from local seafood restaurants, and 50% less cement than a traditional Reef Ball structures, making these structures affordable and ethical to produce. An added benefit to having POSH versus the traditional Reef Ball is that these units naturally contain small interstitial spaces Providing Shelter for many species and feature a naturally rough exterior prompting oyster growth. The use of these units has not only has significantly reduced wave energy, CO2 emissions, and eliminated plastic material from design but also created habitat structures for many organisms benthic, nektonic and recruiting oyster. ¾ÅÉ«ÊÓƵ Researchers and volunteers will continue to monitor POSH for biological growth, habitat use, and sediment accretion. If you are interested, Please contact Dr. Gelsleichter at  jim.gelsleichter@unf.edu, Dr. Crowley at r.crowley@unf.edu or Ethan Fuhrmeister at N01467423@unf.edu for more information.

  Some additional links to news articles related to the work done on POSH are below. 

  • ¾ÅÉ«ÊÓƵ: National Park Service awards ¾ÅÉ«ÊÓƵ grant to significantly expand Florida and Georgia coastline restoration efforts
  • ¾ÅÉ«ÊÓƵ: ¾ÅÉ«ÊÓƵ & partners host largest POSH shoreline restoration project
  • ¾ÅÉ«ÊÓƵ: ¾ÅÉ«ÊÓƵ shoreline restoration techniques prove better than industry standard  
  • ¾ÅÉ«ÊÓƵ: Kingsley Plantation Shoreline Restoration Project

Evolutionary Genetics and Speciation in Coastal and Marine Organisms

• Dr. Matt Gilg
  All animal populations exhibit genetic variability, differences in the DNA structure of individuals in the population that give them some different traits and abilities.  For example, darker-skinned people have greater protection from the potentially damaging effects of sunlight and people that exhibit certain types of genetic mutations may suffer from diseases such as diabetes.  Genetic variability also occurs in coastal and marine organisms and may influence their susceptibility to the many stressors that they face risks from.  For example, genetic differences in some coral species may make some individuals more resilient to warming ocean temperatures whereas genetic variability in some seagrass species may make some individuals less susceptible to some diseases.   ¾ÅÉ«ÊÓƵ Coastal and Marine Biology faculty are currently studying how genetic variability influences the resilience of aquatic wildlife with the ultimate goal of conserving these populations in the face of growing ecological threats.  We are also conducting basic research on how speciation, the formation of new species, and hybridization, the breeding between members of different species, occur in coastal and marine animals because they influence genetic variability in ways that could be either helpful or harmful to wildlife populations or either useful or problematic for humans.

Fishery Science and Invasive Species biology

• Dr. Eric Johnson
  Fisheries are important to human populations because they provide food, recreation, and vast economic benefits.  However, as highly publicized in recent years, a large portion of global fishery resources are overexploited and these declines could lead to a loss of the benefits that fisheries provide us as well as to declines in the health of coastal and marine ecosystems.   ¾ÅÉ«ÊÓƵ Coastal and Marine Biology faculty are currently studying how certain commercially important fishery species such as blue crabs and American eels replace themselves so that approaches for reducing overfishing of these resources can be developed.  We are also studying how other ecological stressors, including the introduction of invasive, non-native species such as the lionfish, can impact commercially important fish populations.

Shark and Ray Biology

• Dr. Jim Gelsleichter
  As important predators in estuarine and marine ecosystems, sharks and rays play critical roles in maintaining balance in aquatic food webs.  They also provide important benefits to humans through their use in fisheries, public aquaria, and ecotourism.  However, many shark and ray populations have been drastically reduced as a result of overfishing.  Since 2009, ¾ÅÉ«ÊÓƵ Coastal and Marine Biology faculty in the ¾ÅÉ«ÊÓƵ Shark Biology Program have been surveying northeast Florida shark populations with the goal of identifying trends in the abundance and population status of these fishes.  We also study habitat use, reproduction, and pollutant exposure and effects in sharks and rays, providing information essential for their management and conservation.