ABC WPLG Local 10 anchor / reporter Louis Aguirre donned a wetsuit, mask, and snorkel to visit the Coral City Camera with Colin the day after the University of Miami’s Rescue a Reef program transplanted endangered elkhorn corals alongside the staghorn corals they transplanted last year. Watch the feature above / read the story @ https://tinyurl.com/ynaxu428

Rescue a Reef explains what they hope to achieve in this exciting new chapter in Coral City:

‘One year ago, the Rescue a  Reef team from the University of Miami outplanted colonies of staghorn coral (Acropora cervicornis) at the Coral City Camera to create a public-facing restoration site and better understand how corals adapt to urban environments. We were thrilled with their success! To expand on this small-scale experiment, we outplanted twenty-five colonies of elkhorn coral (Acropora palmata) at the CCC and will monitor their growth, productivity, and resilience over the next year! The new corals consisted of five different genotypes that were put through heat stress testing by UM and the Shedd Aquarium, and included some of the most successful in the face of rising temperatures. This experiment was designed to be a springboard for expanded research and explore novel ways to garden and restore corals in urban environments. Along with a greater understanding of our Coral City, we hope that having a public-facing coral restoration site will help communities make a stronger connection with corals and give them more incentives to fight to protect them!’

Update 4/22/24: ABC WPLG Local 10 has named Colin a ‘Don’t Trash Our Treasure’ most treasured citizen for his work with the Coral City Camera.

As reported in the Miami New Times, in June 2022, a combination of heavy rains and an ancient crumbling seawall in the process of reinforcement along Star Island’s southwest corner resulted in its collapse. The collapse was discovered by our colleagues at NOAA who arrived there by boat to study the nature and resilience of the urban corals in North Biscayne Bay. This is in addition to sites on the north and south side of the MacArthur Causeway and the east end of PortMiami near the Coral City Camera. Brain corals from these sites were analyzed and published ‘Molecular Mechanisms of Coral Persistence Within Highly Urbanized Locations in PortMiami’ in 2021, the first paper of its kind to offer an explanation for the success of these corals compared to their offshore counterparts. 

Coral Morphologic first began exploring these urban habitats after documenting an unusual Acropora sp. inside Government Cut in 2009 which totally upended the idea of what an ‘ideal’ habitat was for these endangered stony corals. We subsequently started exploring areas deeper in North Biscayne Bay and found surprisingly robust populations of reef building corals. When a historic cold snap in January 2010 left them unphased (while the Florida Keys nearshore corals were all but wiped out), we began to suspect that the corals in these habitats were truly special, and scientifically valuable for research. 

Colin first observed the Star Island seawall on Feb 14th 2013 when Gloria Estefan’s son Nayib asked him to document the marine life living along their riprap seawall (she was so happy to learn how healthy it was!). He was amazed by the life on these rocks, and how many more fish there were around them then on the neighboring seawall that lacked riprap. But upon closer inspection there were several very large Orbicella faveolata encrusted directly on it and multiple large brain corals at the base of it. This seawall at 40 Star Island Drive was likely the oldest seawall in Miami, possibly dating back to its development in the 1920s. 

When the SCTLD (Stony Coral Tissue Loss Disease) outbreak took off in 2015 we observed that these urban corals seemed to be more resistant to it, and would often survive with partial mortality. With these anecdotal observations, Dr. Ian Enochs of NOAA reached out to us about setting up a formal investigation to see how these corals might differ from their offshore counterparts.

In early 2020 with the launch of the Coral City Camera, the CURES (Coral Urban Research Experimental Site) nursery was set up within view at the east end of Port Miami where research continues to this day (and now serves as an experimental research site for Rescue a Reef to ‘stress adapt’ their corals to help find more resilient strains that will be useful in the restoration of Miami’s nearshore reefs). 

After NOAA and the University of Miami performed the rescue of the corals at 40 Star Island in July, they repatriated a number of them to an offshore ‘Spawning Hub’ on Rainbow Reef where they will be able to spawn with other members of their species and hopefully provide some other their resilient genetics and microbiome to the next generation. Fifteen colonies and fragments of corals were also brought to the Coral City Camera site at PortMiami where they were cemented down by UM scientists. Several weeks later, all these transplanted corals have survived and appear to be settling in nicely to their new urban coral community.

Update 11/2/22: Watch a follow-up feature on the seawall collapse and coral rescue with ABC WPLG Local 10 anchor / reporter Louis Aguirre:

On June 23rd, 2021 fifteen colonies of five different genotypes of endangered staghorn corals (Acropora cervicornis) were transplanted to the rubble zone in front of the Coral City Camera by Rescue a Reef, a citizen science program based at the University of Miami. The goal of this experiment was to try and identify stress-tolerant strains of staghorn corals to better inform Rescue a Reef of the strains best suited for near-shore habitats. We anticipated that not all the strains would survive (or perhaps none would survive), but given that this was a science experiment using clones, any mortality would be offset by the fact that dozens to hundreds of more clones exist in Rescue a Reefs offshore coral nurseries. The results greatly exceeded our best expectations!

As far as we are aware, this is the longest continuous in-situ growth timelapse of corals ever made!

This timelapse begins on June 28, 2021, just a few days after transplantation and replacing the CCC (which slightly altered the perspective). Over the course of the next several weeks, tissue die-off progressed rapidly across many of the colonies (Seen as bright white skeleton before being overgrown with brown algae). However, after a month of acclimation, the staghorn corals stabilized and adapted to their new Anthropogenic habitat despite water temperatures exceeding 90 (32C) in August and September (but no significant coral bleaching was observed!). Over the course of this time, the perspective shifts slowly as the Camera slowly subsides in the sediment and leans away from the rubble zone (due to the powerful currents in the area).

Ongoing research with University of Miami, NOAA, and Penn State University is now looking into the microbiomes of these staghorn corals to compare how they may have changed from their offshore clones. We observed on a night dive in September of 2021 while filming the ‘Coral City Fluorotour‘ that these staghorn corals were expressing fluorescent green proteins which is unusual for the species, and isn’t observed in their offshore counterparts. Unlocking the secrets of these urban-adapted ‘super corals’ is just the next step in understanding their remarkable resilience. Perhaps the site around PortMiami is ideal for evolutionarily assisting and stress-adapting corals before out-planting to the beleaguered nearshore reefs around Miami.

Just as the new coral growth is interesting to watch, equally interesting is to witness the erosion and disappearance of the dead staghorn branches of the colony closest to the Camera. This erosion occurs from the parrotfish whose powerful beak-like teeth can rasp the surface layer of algae while crunching the limestone skeleton (and then pooping sand). The club-tipped finger coral (Porites porites) in the lower right corner of the view is also interesting to observe over the year, as the parrotfish are fond of eating the healthy branch tips, rendering them very club-like in Coral City!

Playback speed is at 15 frames (days) per second (about one month per 2 seconds).

We are proud to present Coral City Flourotour, our first short film in 3 years, and our first in-ocean filming project using techniques developed in the CM lab / studio. Coral City Flourotour documents the highly fluorescent corals living near the Coral City Camera site at PortMiami.

These urban corals are not just survivors, but pioneers who have self-recruited to the boulder shoreline deployed to the Port in 2010. Some of the larger brain corals featured were previously transplanted from other urban habitats by Miami-Dade County DERM. Coral Morphologic has documented 27 of Florida’s 48 stony coral species living at this site, as well as more than 170 species of fish documented via the CCC.

Critically endangered staghorn corals (Acropora cervicornis) were transplanted to the site in June 2021 by University of Miami’s Rescue a Reef program. The fluorescence survey conducted in this film revealed they’ve activated fluorescent proteins which are not normally expressed in offshore waters. Scientists from UM and NOAA are now seeking to understand what changes these corals have undergone adapting to life in such an anthropogenically-altered environment, as it may have larger implications related to the restoration of Floridian and Caribbean reefs. Recently published research by NOAA has discovered the corals living in these urbanized environments have made important adaptations that enable them to thrive in Miami’s coastal waters.

Special Thanks to Bridge Initiative, Bas Fisher Invitational, PortMiami, Biscayne Bay Pilots, Miami-Dade County, NOAA AOML, Rescue a Reef