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Expert Q&A: The Summer of Sargassum?

Mar 16, 2023

3 min



A 5,000-mile-wide mass of sargassum seaweed is drifting toward Florida's beaches. It could arrive, with its brown, slick leaves and rotten eggs smell, around July as the state's Atlantic beaches are filled with locals and tourists.  


Florida Tech oceanographer Kevin Johnson offered his insights into this looming arrival. Is it dangerous? Will it spoil the beaches? Here are his answers to some key questions.


QUESTION: Is this situation really a big deal?

Kevin Johnson: I wouldn’t say it is being overhyped, but it is yet to be determined whether this year will have greater amounts of sargassum in the Atlantic offshore, (visible by satellite) or coming ashore and covering the beaches, a connected but separate phenomenon requiring the cooperation of onshore winds. 2018 was a record-setting year, and this year could exceed what was seen in both locations in 2018. If the winds contribute strongly to sargassum coming ashore, it could make it smelly and hard to find an area of clean sand to set up on the beaches.


QUESTION: Is there a health risk if we head to a beach where sargassum is present?

Kevin Johnson: Sargassum doesn’t produce aerosolized organic toxins, but as it rots on the beach, it will smell and give off hydrogen sulfide gas, or H2S. That's the stuff that smells like rotten eggs. When concentrated in enclosed areas, this gas is toxic and can be harmful. However, in the open air, diluted on an exposed beach, it is more of a smelly nuisance than a genuine health hazard for most people.

But there could be a minor irritation, like itching, after coming into contact with sargassum. There are symbiotic species living in and amongst this seaweed when it is healthy and floating at sea. (These intricate relationships are part of what makes sargassum ecologically significant as a food source, nursery and habitat for many populations.) One of the symbionts is a tiny branching colonial hydroid, related to corals. it grows on sargassum fronds. Hydroid colonies have a sting like corals and jellyfish, but it is generally not severe. Some people may experience itching around their feet or ankles (or any body part that contacts the sargassum hydroids) if they brush up against sargassum in waves or swash, or step on freshly deposited sargassum on the sand. Many people will not be bothered or only mildly troubled by this, but some people may be more sensitive to the hydroids.


QUESTION: I was planning to visit the beach. Should I reconsider now? 

Kevin Johnson: If the winds collude with the large bloom already underway to deliver huge mats to the beach, it could be hard for beachgoers to find a place to sit on the sand, and the smells could make the beach untenable. I emphasize “could” with the hydrogen sulfide smell because it depends on how the sargassum is deposited and how wet it is as it breaks down. In some cases, beached Sargassum can be very dry and in such cases it may not smell too bad. People who are more sensitive to the hydrogen sulfide or to the hydroids on the fresh sargassum may find the experience even more unpleasant. Westerly winds would be helpful from the perspective of keeping sargassum away from beaches, but unfortunately easterlies are pretty common this time of year.


If you're a reporter looking to know more about this topic, let us help with your coverage. Dr. Johnson can be available for phone, Zoom or, depending on scheduling, in-person interviews. 

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Expert Q and A: Understanding "Punch," The Baby Monkey That Captured The World's Heart

A tiny Japanese macaque named Punch has unexpectedly become one of the internet’s most talked-about animals. Born at a zoo in Japan and rejected by his mother shortly after birth, the young monkey was hand-raised by staff and given a stuffed toy for comfort—an image that quickly ricocheted across social media worldwide. Videos showing Punch tentatively approaching other macaques, sometimes being pushed away or corrected as he tried to socialize, struck an emotional chord. What began as a local zoo update rapidly turned into international headlines, with audiences from North America to Europe weighing in on what they saw as loneliness, resilience and the universal need for belonging. But experts say the story is more nuanced than a viral clip suggests. The interactions that many viewers interpreted as bullying are, in fact, typical components of macaque social development, part of how young primates learn boundaries, hierarchy and group norms. While Punch’s early maternal separation makes his integration more delicate, gradual acceptance into the troop is a positive sign. As internet users continue to share and comment, the moment has sparked broader conversations about animal emotion, anthropomorphism and the realities of wildlife behavior in managed care settings. Florida Tech's Catherine Talbot offered insight into the complexities of animal behavior.  Catherine F. Talbot is an assistant professor in the School of Psychology at Florida Tech and co-director of the Animal Cognitive Research Center at Brevard Zoo. Her overarching research goal has been to study the ultimate (evolutionary) and proximate (behavioral, biological, and developmental) mechanisms underlying sociality. Q: Is it normal for mother macaques to abandon their babies, or is this an unusual occurrence? What circumstances can cause this to happen?  It’s not necessarily normal, but also not that uncommon in primates, unfortunately. It’s more common in first time mothers that are inexperienced and sometimes lower ranking mothers. A number of factors can increase the likelihood of abandonment including stress on the mother and unfavorable conditions such as limited resources. Q: How does abandonment affect development in young macaques?  Early maternal contact is critical for normal behavioral and emotional development. Infants rely on their mothers for nutrition, warmth, protection and learning how to navigate social dynamics. When infants do not have their mothers during critical developmental periods like infancy, in the short term, they tend to have elevated stress responses and difficulty with emotional regulation. In the long-term, it depends on whether the infant is able to form other types of attachment. In the worst-case scenario, they may have increased aggression, abnormal and/or self-injurious behavior, digestive issues and may lack social skills. But primates are resilient, and with social support and gradual integration into a troop, Punch can form new attachments, learn socially appropriate behavior and ultimately live a fairly normal monkey life. Q: Is it obvious to the rest of the troop when a young macaque has no mother? How does this affect integration?  Japanese macaques have really complex social worlds, so they are really in tune with the relationships they have with one another and recognize the relationships between other individuals. That can certainly make it more difficult for Punch to be accepted back into the troop – he needs to find some friends and possibly even a surrogate parent. With social support, he should be able to recover from the absence of a mother. It’s really great to see that the care staff stepped in to support Punch as he begins to recovery from the stress of this experience. It’s even more important that Punch is around other monkeys of the same species so that he can continue to learn from them and respond appropriately to social communication cues. I’m thrilled to see that Punch is now making friends. Q: Punch is obviously attached to his stuffed orangutan. We can understand how this happens from our own human experience, but can you explain, on a biological level, how he bonded with this stuffed animal? Primates, including humans, are neurobiologically wired to form strong social bonds with a caregiver very early in life. In many primate species, infants are born highly dependent on their mother. Punch’s attachment to the stuffed orangutan reflects this need for attachment. That physical touch – warmth, softness, graspable limbs, a stable physical presence – can partially activate those same calming biological pathways, including the release of oxytocin which regulates stress and promotes feelings of safety. 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As Punch continues to integrate into his troop, I would expect to see some social testing by other members of the group to see how Punch responds- they may use mild aggression like open mouth threats or direct stares (which arethreatening is macaques), brief chases, and displacement from resources like food/resting spots. These will help clarify Punch’s rank and help form and maintain a stable hierarchy. Therefore, I hope to see Punch make at least a few strong social bonds (friends), to help defend him against more intense aggression. As long as he makes a few friends, he should begin to receive more affiliative behavior. Integration is usually gradual as these bonds form and strengthen and these skills develop. I would expect to see more play and grooming with conspecifics and less reliance on his stuffed orangutan as real social bonds start to form. Grooming is especially important for forming and maintaining social bonds and there are already videos showing Punch receiving some grooming from older monkeys, which bodes well for him. He also needs to respond in socially appropriate ways, like grooming others and showing submission to higher ranking individuals. Essentially, he needs to understand and follow the rules of Japanese macaque society. Q: What message do you have as people continue to root for Punch?  It's uplifting to see how much support Punch has gained across the world. And while Punch is clearly adorable and so vulnerable that you just want to love him and give him (or other monkeys like him) a home, it’s important to remember that more than anything else, he needs to live with other monkeys so that he can live a life that is true to his species and nature. Unfortunately, many people still have monkeys as pets. The illegal wildlife trade is a multi-billion-dollar industry, ranking as the fourth largest illegal trade after drugs, arms, and human trafficking. Within the United States, it is estimated that there are more than 15,000 nonhuman primates living in unsuitable conditions. Primates are intelligent, sentient beings that need complex communities and relationships to thrive. There currently is no federal legislation that protects primates from private ownership, but the Captive Primate Safety Act (H.R.3199/ S.1594) has been proposed to prohibit the private possession of nonhuman primates and the sale or transportation of nonhuman primates for the wild pet trade. If you're interested in connecting with Catherine and learning more about animal behavior,  let us help. Contact  Adam Lowenstein, Assistant Vice President for External Affairs at Florida Institute of Technology, at adam@fit.edu to arrange an interview today.

3 min

Ape Ancestors and Neanderthals Likely Kissed, New Analysis Finds

Kissing occurs in a variety of animals but presents an evolutionary puzzle: it appears to carry high risks, such as disease transmission, while offering no obvious reproductive or survival advantage. Despite kissing carrying cultural and emotional significance in many human societies, up to now researchers have paid little attention to its evolutionary history. In the new study, “A comparative approach to the evolution of kissing,” published this week in the journal Evolution and Human Behavior, the researchers carried out the first attempt to reconstruct the evolutionary history of kissing using a cross-species approach based on the primate family tree. The results indicate that kissing is an ancient trait in the large apes, evolving in the ancestor to that group 21.5 – 16.9 million years ago. Kissing was retained over the course of evolution and is still present in most of the large apes. The team also found that our extinct human relatives, Neanderthals, were likely to have engaged in kissing too. This finding, together with previous studies showing that humans and Neanderthals shared oral microbes (via saliva transfer) and genetic material (via interbreeding), strongly suggests that humans and Neanderthals kissed one another. “While kissing may seem like an ordinary or universal behavior, it is only documented in 46% of human cultures,” said Catherine Talbot, co-author and assistant professor in the College of Psychology at Florida Tech. “The social norms and context vary widely across societies, raising the question of whether kissing is an evolved behavior or cultural invention. This is the first step in addressing that question.” Matilda Brindle, lead author and evolutionary biologist at Oxford’s Department of Biology, said: “This is the first time anyone has taken a broad evolutionary lens to examine kissing. Our findings add to a growing body of work highlighting the remarkable diversity of sexual behaviors exhibited by our primate cousins.” To run the analyses, the team first defined what constitutes a kiss. This was challenging because many mouth-to-mouth behaviours look like kissing. Since the researchers were exploring kissing across different species, the definition also needed to be applicable to a wide range of animals. They therefore defined kissing as non-aggressive, mouth-to-mouth contact that did not involve food transfer. Having established this definition, the researchers collected data from the literature on which modern primate species have been observed kissing, focusing on the group of monkeys and apes that evolved in Africa, Europe and Asia. This included chimpanzees, bonobos, and orangutans, all of which have been observed kissing. They then ran a phylogenetic analysis, treating kissing as a ‘trait’ and mapping this to the family tree of primates. They used a statistical approach (called Bayesian modelling) to simulate different evolution scenarios along the branches of the tree, to estimate the probability that different ancestors also engaged in kissing. The model was run 10 million times to give robust statistical estimates. Stuart West, co-author and professor of evolutionary biology at Oxford, said, “By integrating evolutionary biology with behavioral data, we’re able to make informed inferences about traits that don’t fossilise – like kissing. This lets us study social behaviour in both modern and extinct species.” While the researchers caution that existing data are limited – particularly outside the large apes – the study offers a framework for future work and provides a way for primatologists to record kissing behaviors in nonhuman animals using a consistent definition.

3 min

Expert Insight: Dampening the Data Desert: A First Step Toward Improving Space Coast Climate Resilience

By Steven Lazarus Like many coastal regions, Florida’s Space Coast faces significant climate resilience challenges and risks. According to the National Oceanic and Atmospheric Administration (NOAA), Florida has over 8,000 miles of shoreline, more than any other state in the contiguous U.S. In addition, the 2020 census indicates that that there are 21 million Florida residents, 75-80% of which live in coastal counties. This makes our state particularly vulnerable to rising sea levels, which are directly responsible for a host of coastal impacts, such as saltwater intrusion, sunny-day (high-tide) flooding, worsening surge, etc. There is growing evidence that storms are becoming wetter as the atmosphere warms— increasing the threat associated with compound flooding, which involves the combined effects of storm surge, rainfall, tides and river flow. Inland flooding events are also increasing due to overdevelopment, heavy precipitation and aging and/or inadequate infrastructure. The economic ramifications of these problems are quite evident, as area residents are confronted with the rising costs of their homeowners and flood insurance policies. As the principal investigator on a recently funded Department of Energy grant, Space Coast ReSCUE (Resilience Solutions for Climate, Urbanization, and Environment), I am working with Argonne National Laboratory, Florida Tech colleagues, community organizations and local government to improve our climate resilience in East Central Florida. It is remarkable that, despite its importance for risk management, urban planning and evaluating the environmental impacts of runoff, official data regarding local flooding is virtually nonexistent! Working alongside a local nonprofit, we have installed 10 automated weather stations and manual rain gauges in what was previously a “data desert” east of the Florida Tech campus: one at Stone Magnet Middle School and others at local homes. “We think that a ‘best methods’ approach is proactive, informed and cost-effective. The foundation of good decision-making, assessment and planning is built on data (model and observations), which are critical to adequately addressing the impact of climate on our communities.” – steven lazarus, meteorology professor, ocean engineering and marine sciences Data from these stations are available, in real-time, from two national networks: CoCoRaHS and Weather Underground. The citizen science initiative involving the rain gauge measurements is designed to document flooding in a neighborhood with limited resources. In addition to helping residents make informed choices, these data will also provide a means by which we can evaluate our flood models that will be used to create highly detailed flood maps of the neighborhood. We are working with two historic extreme-precipitation events: Hurricane Irma (2017) and Tropical Storm Fay (2008)—both of which produced excessive flooding in the area. What might the local flooding look like, in the future, as storms become wetter? To find out, we plan to simulate these two storms in both present-day and future climate conditions. What will heat stress, a combination of temperature and humidity, feel like in the future? What impact will this have on energy consumption? The station data will also be used develop and test building energy-efficiency tools designed to help the community identify affordable ways to reduce energy consumption, as well as to produce high-precision urban heat island (heat stress) maps that account for the impact of individual buildings. The heat island and building energy modeling will be complemented by a drone equipped with an infrared camera, which will provide an observation baseline. We think that a “best methods” approach is proactive, informed and cost-effective. The foundation of good decision-making, assessment and planning is built on data (model and observations), which are critical to adequately addressing the impact of climate on our communities.

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