Director

Michael Heithaus

Dr. Heithaus is dean of the College of Arts, Sciences & Education (CASE) and Professor in the Department of Biological Sciences at Florida International University (FIU). A marine ecologist specializing in predator-prey interactions and the ecological importance of sharks and other large marine species, Heithaus is the principal investigator and co-principal investigator on grants totaling $28 million. His research leverages a number of cutting-edge technologies, including drones and animal-borne cameras, to unravel the mysterious lives of hard-to-study marine creatures. His work in Shark Bay Australia is the most detailed study of the ecological role of sharks in the world. Working with several prominent non-governmental organizations, it has been used as the underpinning for effecting positive policy changes.

View Dr. Heithaus' full bio

Graduate Students

  • Liberty Boyd

    Liberty's research focuses on sea turtle trophic ecology and their influence on community dynamics. In particular, she is interested in researching the potential for green sea turtles (Chelonia mydas) to serve as a vector for nutrient transfer through foraging, movement, and nesting activity. Previously, she has participated in a research project in Abaco, Bahamas, studying top-down and bottom-up influences on green sea turtle foraging preferences. Now, her green turtle research is being expanded to Nosy Be, Madagascar, to obtain more information on green turtle foraging ecology and population dynamics in the Indo-Pacific region.

    lboyd008@fiu.edu

  • Camila Caceres

    Camila's research interests range from behavioral ecology to small-scale fisheries and conservation. Her background has been focused on cognitive evolution and behavioral research, but her recent projects are centered around the interactions between human communities and their ecosystems. Through interdisciplinary methods, she studies how small-scale and artisanal fisheries affect coastal elasmobranch populations in various regions in the world. By understanding the social and economic importance of shark and ray fisheries, Camila hopes to improve conservation and management policies in order to preserve their populations as well as the human populations that depend on them.

    Camila.caceres2@fiu.edu

  • Jessica Carde

    Jessica is interested in the behavioral and trophic ecology of marine apex predators and how these species influence their habitat and community. Her research focuses on bottlenose dolphins (Tursiops truncatus) in Biscayne Bay, Florida. Specifically, she investigates changes in spatial distribution, habitat use and behavior in response to a changing environment. Additionally, she studies the foraging ecology and social structure of dolphins in this system, and how environmental changes affect the ecological roles and group dynamics of these animals. This project is conducted in collaboration with the NOAA Southeast Fisheries Science Center.

    Jcard145@fiu.edu

  • N. Frances Farabaugh

    N. Frances Farabaugh is interested the behavioral ecology of marine predators, sharks in particular. Her current research aims to elucidate the role sharks play in structuring reef communities, through investigating questions surrounding topics such as predation risk effects, the functional redundancy of marine predators, and the drivers of relative abundance and diversity of sharks and rays. The main body of her current work has been conducted in French Polynesia and is closely associated with the Global FinPrint Project.

    nfara005@fiu.edu

  • James Kilfoil

    James' goal as a Ph.D. student is to develop quantitative tools which can be used to improve the way information is collected for resource monitoring programs. This type of research is particularly needed for elasmobranchs (sharks and rays), given that we lack even the most basic information needed for the proper management for nearly 50% of all known species. As a part of his dissertation, James is working closely with the Heithaus lab on the potential uses of various video surveys (i.e. baited remote underwater video, un-baited underwater cameras, and unmanned aerial vehicles) to assess and monitor shark populations in data-limited regions. Using French Polynesia as a primary study region, he intends to investigate how these video surveys compare to traditional methods (i.e. longlines), how accurately they can track changes in abundance, and how environmental variables as well as animal behavior may influence detection rates. The primary study site for this work is the small French Polynesian atoll of Tetiaroa. This system offers a unique opportunity to answer these questions given its pristine nature and relatively small size; enabling us to exhaustively survey the entire system.

    View James' publications

    Jkilf001@fiu.edu

  • Courtney Knauer

    Courtney's research interests lie in expanding current knowledge on the foraging ecology of sea turtles and understanding how sea turtles contribute to the community dynamics within their habitats. Specifically, her research focuses on the bottom-up effects of reef habitat on hawksbill sea turtle (Eretmochelys imbricata) densities and distributions as well as the top-down effects that hawksbills have on coral reef resilience in Nosy Be, Madagascar. Her research aims include: identifying prey species and quantifying the foraging rates of hawksbills; determining how reef quality effects hawksbill encounter rates, population densities and distribution; and understanding the role these turtles play in the competition between sponges and corals on reefs. It is Courtney's hope that this research will increase understanding of a critically endangered species and promote knowledge-based conservation for both hawksbill sea turtles and coral reef ecosystems.

    cknauer@fiu.edu 

  • Hannah Mayers

    Hannah Mayers is a PhD student at FIU. She received her Bachelors of Science in Biology from California State University Monterey Bay in 2017.

    hmaye@fiu.edu

  • Valeria Paz

    Valeria is an FIU CREST Center for Aquatic Chemistry and Environment fellow. Her research focuses on investigating habitat use, trophic interactions, pollutant loads, and behavioral ecology of bottlenose dolphins (Tursiops truncatus) in the Florida Coastal Everglades (FCE). She is using multiple methods such as heavy metals and stable isotope analysis, passive acoustic monitoring, and focal follows. Ultimately, she hopes her research will help elucidate how predators might respond to environmental variability to better predict how the Everglades’ restoration might affect this population.

    vpaz003@fiu.edu 

  • Vincent Quiquempois

    Vincent's work focuses on investigating the foraging ecology of baleen whales, particularly in tropical and temperate ecosystems. He is also interested to understand the drivers of horizontal and vertical movements of large whales, particularly in relation to prey dynamics.

    As a PhD student, Vincent studies the foraging ecology of Bryde's whales (Balaenoptera edeni) in the northeastern Gulf of Mexico. He uses a combination of active acoustic methods, animal-borne video tags and stable isotopes to study this endangered population that is severely impacted by a range of human activities in the region (shipping, oil extraction, fisheries, etc.). He hopes his project will inform the U.S. authorities to improve the conservation of Gulf of Mexico Bryde's whales.

    Vquiq001@fiu.edu

  • Bradley Strickland

    Bradley is fascinated by the roles that predators have in structuring communities and affecting ecosystem processes. From past experiences, he has developed an interest in questions rooted deeply in ecological theory that transcend a specific taxa or system. For his PhD research, he is focusing on how top predators – including alligators and sharks in the Florida Coastal Everglades – influence ecosystems through stimulating bottom-up processes and transforming the physical environment.

    bstri007@fiu.edu 

  • Brendan Talwar

    Brendan's research interests are motivated by a desire to inform fisheries management using a variety of techniques. His previous work has focused primarily on understanding and reducing shark bycatch mortality as well as documenting deep-sea biodiversity prior to commercial exploitation. These projects have led to my current interest in the nutrient-poor pelagic ecosystem of Exuma Sound, The Bahamas, where numerous predators (sharks, whales, birds, etc.) compete for highly limited resources across broad spatial scales in the face of heavy fishing pressure elsewhere in the world. This research falls under the umbrella of the Exuma Sound Ecosystem Research Project being led by the Cape Eleuthera Institute. Along with partners from around the world, the broad goal of this project is to understand the interactions of these predators in order to inform ecosystem-based management for this and similar habitats in the future.

    The first phase of the project (2018-2019) will involve a midwater longline survey and fixed-wing drone survey to identify key players in the ecosystem prior to deploying satellite tags and gathering stable isotope data on the most abundant, and often least understood, predators in this system (e.g., silky and dusky sharks, beaked whales).

  • Kristine Zikmanis

    Kristine is interested in the trophic and behavioral ecology of marine predators. Kristine's research is focused on the impacts of the Picayune Strand Restoration Project on the shark species of Faka Union and Pumpkin Bays. She will be focused on how the attempt to return the area's watershed to a more natural flow will impact habitat use and contaminant loads in juvenile bull sharks.

Lab Alumni

  • Cindy Bessey

    Cindy's broad research interests are in the field of animal behavior and how animals modify their behaviors in changing conditions to meet their life history requirements. Specifically, she is interested in how lower trophic level organisms are impacted through trophic cascades. Her current research will focus on habitat use of the facultative herbivorous fish Pelates sexlineatus (Six-Lined Trumpeter) in the seagrass beds of Shark Bay, Australia. She will investigate what conditions occur that promote or discourage herbivory in these fish.

    Cindy would like to investigate which seagrasses are preferred, as well as the changes in intensity of grazing in both the presence and absence of megagrazers and piscivores. She will also investigate the variation in abundance of these fish in structurally diverse seagrass habitats, and the structural changes to the seagrass bed that result from the grazing behavior of P. sexlineatus.

  • Derek Burkholder

    Derek graduated in 2012 after studying the dynamics of the Shark Bay seagrass ecosystem. Derek's work examined the ecological role of green turtles (Chelonia mydas), the community and nutrient dynamics of seagrasses across multiple spatial and temporal scales, and the possibility that tiger sharks initiate a behavior-mediated trophic cascade that is mediated by predation-sensitive shifts by turtles and dugongs. He found that risk-sensitive foraging by large grazers results in considerably different seagrass communities between safer and more dangerous habitats and that tiger sharks likely trigger behavior-mediated trophic cascades.

  • Katy Cameron

    Katy studied regional variation in the abundance and habitat use of tiger sharks in Shark Bay, Western Australia. She completed her M.S. in 2010 and was a co-author on a paper published in Animal Behavior.

  • Bryan Delius

    Bryan conducted initial studies of bull sharks in the Florida Coastal Everglades. His work focused on documenting spatial and temporal variation in catch rates of sharks within the estuary and analyzing stable carbon and nitrogen isotopes of bull sharks captured from the river mouth to 27 km upstream. Bryan received his M.S. in 2007 and his work formed the foundation for ongoing studies in the system. Bryan is currently working for the South Florida Water Management District. Bryan’s work led to a publication in Limnology and Oceanography.

  • Meagan Dunphy-Daly

    Meagan studied spatial and temporal variation in dwarf sperm whale (Kogia sima) habitat use and group size off Great Abaco Island, Bahamas.  She completed her MS in 2008 and published her results in Marine Mammal Science. Meagan continued on to the PhD program at the Duke Marine Laboratory. 

  • Phil Matich

    Dr. Matich graduated with his PhD in 2014 investigating the extrinsic and intrinsic factors shaping bull shark habitat use and trophic interactions in the Florida Coastal Everglades to understand how environmental change attributed to restoration may alter their roles within estuarine ecosystems, a project he is still involved in as it progresses to answer more ecologically applied questions. He went on to work as a postdoctoral research fellow at Sam Houston State University, developing a coastal marine ecology program that is investigating how water management and sea level rise affect coastal food web dynamics and the roles sharks and other predators play within them. He also worked on developing terrestrial experiments and monitoring programs in piney woods ecosystems to test hypotheses derived from coastal research, including spillover effects of conservation areas, effects of disturbance on community structure in fragmented ecosystems, and the role environmental fluctuations play in shaping phenotypic divergence within populations.

    For more information on current and past research, please visit Dr. Matich's website: https://sites.google.com/site/matichphilip/ 

  • Rob Nowicki

    Dr. Nowicki's research interests are focused at the interface of disturbance ecology, predator ecology, functional ecology, and community ecology. For his PhD, he used a widespread seagrass die-off in the world’s largest seagrass ecosystem (Shark Bay, Western Australia) to answer general ecological questions about the effects of resource loss on seagrass associated communities from multiple angles and at multiple scales. This includes determining how seagrass loss influences fauna abundance, community composition, trophic relationships, habitat use patterns, and predation risk effects within the bay’s community- from herbivorous fish to tiger sharks. 

    Dr. Nowicki is also interested in ecological resilience in seagrass ecosystems and what modifies it - particularly in the face of climate change. He has used the Shark Bay die-off to investigate the recovery of Shark Bay’s seagrass ecosystem since 2012 with the goal of predicting likely recovery trajectories of the seagrass assemblage. He has also used this die-off as a "natural experiment" to conduct a manipulative field study examining the role of tiger sharks in facilitating ecosystem recovery. 

    In addition to his two main research areas, he also engages in research on stable isotope analysis of elasmobranchs. Outside of research, he has a love for engaging with the public and in mentoring students at various stages of their scientific careers. After graduating, he became a postdoctoral scientist at Mote Marine Lab in the Florida Keys.

    robert.nowicki@fiu.edu

  • Adam Rosenblatt

    Adam graduated in 2013 after investigating the behavior and ecology of alligators in the Florida Coastal Everglades. He is interested in linking an understanding of behavioral decisions to conservation and management strategies. His PhD focused on how movement and habitat use patterns and trophic interactions of American alligators (Alligator mississippiensis) are influenced by both biotic factors and environmental variables like salinity and patterns of freshwater flow. He found that alligators exhibited considerable individual specialization in movement tactics which were reflected in their diets.  Some individuals remained in relatively restricted areas with lower salinities while others commuted frequently between low-salinity habitats and higher salinity downstream regions to feed. After graduating, Adam became a postdoctoral fellow at Yale.

    arosenbl@fiu.edu 

  • Robin Sarabia

    Robin investigated spatial and temporal variation in the abundance and group sizes of bottlenose dolphins in the coastal Everglades. Her work also focused on residency patterns of individual dolphins and built the first catalog of individuals that will form an important component of future research on dolphins in the coastal Everglades.

  • Abraham Smith

    Abraham's current research involves the development of innovative aquatic toxicity testing methods which use native aquatic organisms to assess the impacts of chemical stressors to an environment. The majority of his work is focused around the Natural Resource Damage Assessment of the Deepwater Horizon Incident. Using a variety of native organisms allows for a more complete understanding of the impacts of a chemical in a specific ecosystem. He is also investigating the use of an estuarine anemone to study the impacts of toxicants, metals in particular, in estuarine ecosystems.

    Abraham.smith@fiu.edu

  • Jeremy Vaudo

    Jeremy conducted his doctoral research in Shark Bay between 2005 and 2007. His work included describing the diverse elasmobranch community of Shark Bay’s nearshore sand flats. Jeremy examined the seasonal trends within this community as well as the habitat use and foraging ecology of the most abundant ray species. He completed his PhD in 2011 and has published numerous papers from his dissertation as well as being an author and co-author on book chapters. Jeremy continues to be involved in the analysis of data on Shark Bay’s elasmobranch populations.

Former Postdoctoral Scientists

  • Jeremy Kiszka

    Dr. Kiszka studies the ecological roles and importance of marine megafauna in marine ecosystems. More specifically, he investigates how they use habitats and resources (their ecological roles) and how ecosystems can be affected by the presence of these animals, which includes their top-down effects on resources and behavior, as well as nutrient dynamics. Empirical studies and a rich theoretical framework also demonstrate marine megafauna can affect ecosystems through more diverse pathways, including those that are driven by behavior. For example, Dr. Kiszka studies the roles of cetaceans, green turtles and several species of elasmobranchs in facilitating access to resources to other species (e.g. teleosts, seabirds), and how mixed-species associations can provide evolutionary benefits to species involved in these interactions. His work implies the use and development of new and innovative research tools and methods to study marine megafauna ecology and conservation issues, particularly since these species are so challenging to observe. Through research and education, he also creates outreach tools and works on providing opportunities for students from minority groups and developing countries to build capacity. At FIU, Dr. Kiszka teaches the online course 'Biology of Marine Mammals' (OCB 4303).

    View Dr. Kiszka's full profile

  • Shomen Mukherjee

    Dr. Mukherjee's primary research interests are in the behavioral dynamics of predator-prey interactions including habitat selection, anti-predator behaviors (e.g., time allocation and vigilance) and state-dependent foraging decisions. He has worked on model systems such as the desert rodents of Thar desert (India) and on desert gerbils and their predators (red fox and barn owls) in the Negev desert (Israel). Currently, he is investigating factors influencing the dynamics of predator-prey foraging decisions in a model aquatic system. Specifically, he is trying to quantify the risk of injury (from its prey) as a foraging cost to predators and how spatial structure/habitat configuration affects the patch and habitat use of both prey and their predators. 

  • Jordy Thomson

    Dr. Thomson's research interests are relatively broad and lie at the intersection of behavior, ecology and conservation in marine systems. He has been working on marine turtles with the Shark Bay Ecosystem Research Project since 2005. His PhD work at Simon Fraser University focused on quantifying spatiotemporal variation in the dive-surfacing behavior of green and loggerhead turtles in Shark Bay and examining its implications for detection probabilities during transect-based population surveys.

    Dr. Thomson's postdoctoral research examined the effects of tiger shark predation risk on turtle behavior and uses stable isotope analysis and video data logging technology to study turtle foraging ecology. He has also begun investigations of a recent dieback of seagrasses in Shark Bay.

  • Aaron Wirshing

    A postdoc in the lab from 2006 to 2008, Aaron worked on predation-sensitive foraging behavior in Shark Bay's dugongs and the influence of dugong and turtle foraging on the bay's seagrass community. He also spent time working as part of the Long Term Ecological Research Project in the Florida Coastal Everglades. He is now an Assistant Professor in the College of Forest Resources at the University of Washington where he is continuing his studies of predator-prey interactions.