Lionfish - A problematic invasive species

You can forget about such trivialities as the amberjack or snapper. Over one hundred divers have managed to bring in more than five hundred Indo-Pacific red lionfish during the first group effort to help decrease the numbers of this wily invader which has set its sights on the Florida Keys National Marine Sanctuary.

The first of three such get togethers, cleverly dubbed lionfish derbies, brought in some twenty-seven teams which were all gun ho on earning the sweet cash and prizes being dangled in front of them to bring in the most, biggest, and mot tiny lionfish. The big enchilada, one thousand dollars, was given to the group which managed to snare in one hundred and eleven lionfish.

The next “derby” is shceduled to take place this coming October 16th, weather permitting, at Keys Fisheries restaurant in Marathon, and the final event is said to be November 13th at the Hurricane Hole Marina in Key West.

A representative of the Reef Environmental Education Foundation, Lad Akins, has commented that the lionfish are being released inadvertently by pet owners into the Atlantic, and since they have no natural enemies, they are free to breed and take over.

These lionfish have become quite an item, them being offered up in restaurants and such to help keep them down.. Only time will tell if we are winning the battle, or losing…

Elkhorn Coral

An accidental find just off of Key Largo has lead to farms being created for delicate, yet ever so important, species of coral.

Just over 30 feet below the calm waters above the colorful reef off of Key Largo, Ken Nedimyer proudly displays a small slate which reads “Let’s plant corals.”

Along with a team of volunteer divers, they quickly get to work and utilize epoxy putty to help tiny bits of staghorn coral gain a foothold in the great big ocean.

In the vast expanse of ocean just off of Key Largo, Fort Lauderdale, and a few other choice locations, Nedimyer, an accomplished collector of tropical fish from Tavernier, along with researchers and his hodgepodge group of volunteers, are getting to work and raising groups of rare coral species to help repopulate the rapidly depleting reefs of the southeastern United States.

“These are my little children,” 54 year old Nedimyer, commented later that same day, explaining that the endangered coral which he has been cultivating on slabs of concrete, grows much like delicate saplings in an aquatic underwater offshore nursery.

Elkhorn and staghorn corals are classified as undersea architects, they create structures in the reef which then in turn support a myriad of sea lifeforms such as sponges, fish, lobsters, and many others. These reefs have really taken a beating from things like global warming, disease, and many other stresses over the past three decades, and have declined to just a few sparse patches in the warm waters that run from southern Palm Beach County to the islands of the Caribbean.

However, in an exciting turn of events, staghorn coral was found growing in an undersea farm for commercial aquarium rock, and researchers have now begun to raise these diffent species of coral in nurseries located offshore with the ultimate goal of transplanting them back into the wild.

The Obama administration, through economic stimulus money, has been financing the expansion of the $3.4 million project. It is hoped that this will create 57 full time jobs, commented Tom Moore, who is a representative of the National Atmospheric and Oceanic Administration’s Habitat Restoration Center in St. Petersburg.

Healthy reefs lead to more jobs in the tourism industry, increase the habitat for fisheries, and even provide much needed protection from weather patterns such as hurricanes, Moore continued.

Today there are now a row of 10 such coral nurseries which stretch from Fort Lauderdale to the U.S. Virgin islands, which are cultivating new stands of both the elkhorn and staghorn coral.

“These are two of the most important species of coral,” explained the marine science program manager for The Nature Conservancy, James Byrne. The Nature Conservancy is an ecologically minded group of individuals corporations that have applied for the federal money and is coordinating the work. “The staghorn coral provides very important habitat for juvenile fish, and elkhorn coral is one of the most important reef builders.”

It is nice to see that a group has taken an interest in the “reforestation” of the seas, as well as on land. The ocean is crucial to our world’s survival.. Nice to know someone has remembered that.

As part of a reef restoration study, researchers removed 20 specimens of the Caribbean giant barrel sponge from the Conch Reef off of Key Largo, Florida and then re-attached them using sponge holders consisting of polyvinyl chloride piping. The sponge holders were anchored in concrete blocks set on a plastic mesh base. Some sponges were reattached at a depth of 15 meters and some further down at 30 metres.

Venus Flower Basket sponge. A deep sea glass species.

The results of the study now show that sponges are capable of reattaching themselves to reefs if we help them by keeping them properly secured during the recuperation period. After being held stationary by sponge holders for as little as 6 months the sponges had reattached themselves to the Conch Reef. Of the 20 specimens reattached in 2004 and 2005, 62.5 percent survived at least 2.3-3 years and 90 percent of the sponges attached in deep water locations survived. During the study period, the area endured no less than four hurricanes.

This is very good news for anyone interested in reef restoration, since the new technique can be used to rescue sponges that have been dislodged from reefs by human activities or storms. Each year, a large number of sponges are extricated from reefs by human activities such as vessel groundings and the cutting movements of chains and ropes moving along with debris in strong currents. Severe storms can also rip sponges from the reef, which wouldn’t be a problem if it weren’t for the fact that so many sponges are also being removed by human activities. When combined, storms and human activities risk decimating sponge populations. Old sponges can be hundreds or even thousands of years old and their diameter can exceed 1 meter (over 3 feet). Sponges of such an impressive size and age can naturally not be rapidly replaced by new sponges if they die.

Sponges can survive for quite a while after being dislodged but is difficult for them to reattach themselves to reefs without any help since they tend to be swept away by currents and end up between reef spurs on sand or rubble, where they slowly erode and eventually die.

“The worldwide decline of coral reef ecosystems has prompted many local restoration efforts, which typically focus on reattachment of reef-building corals,” says Professor Joseph Pawlik of the University of North Carolina-Wilmington, co-author of the study. “Despite their dominance on coral reefs, large sponges are generally excluded from restoration efforts because of a lack of suitable methods for sponge reattachment.”

The results of the study, which were published in Restoration Ecology, show that we can help the sponges to survive by using the new technique. Earlier attempts were less successful since they relied on cement or epoxy; two types of adhesives that do not bind well to sponge tissue.