Florida Reef
The Florida Reef (also known as the Great Florida Reef, Florida reefs, Florida Reef Tract and Florida Keys Reef Tract) is the only living
The densest and most spectacular reefs, along with the highest water clarity, are found to the seaward of Key Largo (in and beyond John Pennekamp Coral Reef State Park) and Elliott Key (the northernmost 'true' Florida Key) where the two long keys help protect the reefs from the effects of water exchange with Florida Bay, Biscayne Bay, Card Sound and Barnes Sound. The bays and sounds (all between the Florida Keys and the mainland) tend to have lower salinity, higher turbidity and wider temperature variations than the water in the open ocean. Channels between the Keys allow brackish water from the bays to flow onto the reefs (especially in the middle Keys), limiting their growth.[3]
Reef structure and communities
The Florida Reef consists of two ridges separated from the Florida Keys by the
Almost 1,400 species of marine plants and animals, including more than 40 species of
The
Second is the patch reef community. Patch reefs form in shallow water (three to six meters deep), some in Hawk Channel and some on the outer reef, but mainly on White Bank between Hawk Channel and the outer reefs. Patch reefs start from corals growing on a hard bottom, but grow upward as new corals establish themselves on the skeletons of dead corals. Most of the structure of patch reefs is formed from star (
Third is the bank reef community. Bank reefs are larger than patch reefs and are found on the outer reefs. Bank reefs consist of three zones. The reef flat is closest to the keys, and consists of
Other common species of hard coral found on the Florida Reef include
Individual reefs
Notable individual reefs in the Florida reef system include:
- 9-foot Stake (reef)
- Alligator Reef
- Ajax Reef
- Carysfort Reef
- Cheeca Rocks (reef)
- Coffins Patch (reef)
- Conch Reef
- Crocker Reef
- Davis Reef
- Dry Rocks (reef)
- Eastern Dry Rocks (reef)
- Eastern Sambo (reef)
- French Reef
- Grecian Rocks (reef)
- Hen and Chickens (reef)
- Looe Key
- Marker 32 (reef)
- Molasses Reef
- Newfound Harbor Key (reef)
- Pacific Reef
- Pickles Reef
- Rock Key (reef)
- Sand Key (reef)
- Snapper Ledge (reef)
- Sombrero Key (reef)
- Tennessee Reef
- The Elbow (reef)
- Turtle Reef
- Western Sambo (reef)
Threats to the reefs
Nearly 25% of all ocean life thrives on coral reefs, making these fragile habitats a necessity to ocean ecosystems.[citation needed] Plant and animal life on coral reefs are quickly being destroyed due to pollution, overfishing, and climate change.[citation needed] Animals known as polyps, which create the fundamental structure of a reef, die from ingesting tiny bits of trash floating throughout the ocean called microplastics. Overfishing is also threatening reef fish populations, which feed on the algae that will smother corals. Fluctuating ocean temperatures caused by global warming presents the largest threat to coral reefs. The sudden warming or cooling of the water stresses the corals, causing them to lose their nutrients and turn white, a process known as bleaching. With the destruction of these complex yet fragile ecosystems comes a wide range of global consequences such as extinction of marine species, endangerment to the fishing industries, and severe coastal erosion.
In common with coral reefs throughout the Caribbean and the world, the Florida Reef exhibits some signs of stress and deterioration. Precht and Miller state that the numbers of Elkhorn and Staghorn corals (Acropora ssp.) are declining to an extent that is unprecedented in several thousand years. Between 1981 and 1986, Staghorn corals declined by 96% at Molasses Reef. Between 1983 and 2000 at Looe Key, Elkhorn corals declined by 93% and Staghorn corals by 98%. A joint reef monitoring program conducted by the United States Environmental Protection Agency, Florida Marine Research Institute and National Oceanic and Atmospheric Administration recorded a loss of 6% to 10% living corals at 40 sampling stations from 1996 to 2000.[10]
Elevated temperatures can damage coral reefs, causing coral bleaching. The first recorded bleaching incident on the Florida Reef was in 1973. Incidents of bleaching have become more frequent in recent decades, in correlation with a rise in sea surface temperatures. In July 2023, recordbreaking early and rapid warming resulted in widespread coral bleaching and death.[11] Rescue efforts, such as relocating corals to tanks or to deeper waters have helped some bleached corals recover. Oceanographer Jamison Grove at the NOAA stated that these efforts must be accompanied by reductions in greenhouse gas emission to save the reef.[12] White band disease has also adversely affected corals on the Florida Reef.[13] While hurricanes often can cause localized damage to Elkhorn and Staghorn corals, Precht and Miller state that the severe and widespread loss of those corals on the Florida Reef cannot be attributed to hurricane damage. Other possible causes of the losses of corals on the Florida Reef include epizootic diseases, eutrophication, predation, sedimentation, overfishing, ship groundings, anchor dragging, commercial lobster and crab traps moved by storms, pollution, development on the Keys, growing numbers of visitors to the Keys and the reefs and the growth of seaweed on the coral.[14]
The long-spined sea urchin (Diadema antillarum), which browses on seaweed on and around reefs, was sharply reduced in numbers on the Florida Reef (and throughout the Caribbean) in the 1980s. While populations of this sea urchin have somewhat recovered elsewhere, its numbers are still very low on most of the Florida Reef, with the exception of the Dry Tortugas. As a consequence, there has been no effective check of the growth of seaweed on reef corals. However, the severe die-off of Elkhorn and Staghorn corals occurred before the die-off of the sea urchins, so that the proliferation of seaweed following the loss of the sea urchins was not the cause of the die-off of the corals, but may be retarding recovery by the corals.[15]
Another threat to the Florida Reef is the ongoing
A perceived deterioration of the reefs became a concern in the 1950s. Early attempts to protect the reefs led to the establishment in 1960 of a protected area that became John Pennekamp Coral Reef State Park. The creation of Biscayne National Monument (which later became Biscayne National Park) in 1968 protected the northern part of the Florida Reef. In 1990 the Florida Keys National Marine Sanctuary was established, bringing all of the Florida reef into federal or state protection.[17]
Human use
Human use of the reefs has grown tremendously in the past century. One measure of the growth is that registrations for recreational boats in Monroe County increased by 1000% from 1964 to 2006.[18]
Recreational use of the Florida Reef and surrounding waters is popular and important to the economy of southern Florida, and in particular, of Monroe County. In 2000-2001 artificial and natural reefs in South Florida[19] and Monroe County had 28 million person-days of recreational use by residents and tourists, including scuba diving, fishing and viewing (as, for example, by snorkeling). These activities generated $4.4 million in sales, generated almost $2 million in local income and provided more than 70,000 full- and part-time jobs. The estimated asset value of the reefs was $8.5 billion. About two-thirds of the activity was related to natural reefs.[20]
In Monroe County for the period of June 2000 to May 2001 almost 5.5 million person-days of reef related activities resulted in $504 million in sales, which generated $140 million in income for 10,000 full- and part-time jobs. Almost two-thirds of the activity was by residents, and about half the activity involved fishing, with one-third involving snorkeling and one-sixth scuba diving. [21]
In Dade County for the period from June 2000 to May 2001 a little over 6 million person-days of reef related activities resulted in $1,297 million in sales, which generated $614 million in income for 19,000 full- and part-time jobs. The activity was about evenly split between residents and tourists. As in Monroe County, about half the activity involved fishing, with one-third involving snorkeling and one-sixth scuba diving.[22]
In a more general sense, the reef acts as a layer of protection for human settlements against tropical storms, hurricanes, and erosion.[12]
Shipwrecks and lighthouses
The Florida Current (which merges with the Antilles Current near the northern end of the barrier reef to form the Gulf Stream) passes close to the Florida Reef through the Straits of Florida. Ships began wrecking along the Florida Reef almost as soon as Europeans reached the New World. From early in the 16th century Spanish ships returning from the New World to Spain sailed from Havana to catch the Gulf Stream, which meant they passed close to the Florida Reef, with some wrecking on the reefs. In 1622, six ships of the Spanish treasure fleet, including the Nuestra Señora de Atocha, wrecked during a hurricane in the lower Keys. In 1733, 19 ships of the Spanish treasure fleet wrecked during a hurricane in the middle and upper keys. In the 19th century the Straits became the major route for shipping between the eastern coast of the United States and ports in the Gulf of Mexico and the western Caribbean Sea. The combination of heavy shipping and a powerful current flowing close to dangerous reefs made the Florida Reef the site of many wrecks. By the middle of the 19th century ships were wrecking on the Florida Reef at the rate of almost once a week (the collector of customs in Key West reported a rate of 48 wrecks a year in 1848).[23] Between 1848 and 1859 at least 618 ships were wrecked on the Florida Reef.[24] The Assistant United States Coast Surveyor reported that in the period from 1845 through 1849 almost one million (United States) dollars worth of vessels and cargos were lost on the reef.[25] The chief motivation for the Florida Railroad, the first railroad to connect the Atlantic and Gulf coasts of Florida, was to allow goods to be transferred between ships in the Atlantic and in the Gulf of Mexico, thus avoiding the dangerous passage along the Florida Reef. Salvaging wrecks on the reefs was the principal occupation in the Florida Keys through much of the 19th century, helping make Key West the biggest and richest city in Florida for a while.[26]
Some of the reefs in the Florida Reef are named after ships that wrecked on them. Fowey Rocks is named after
Soon after the United States acquired Florida from Spain in 1821, it began building
In order to provide better charts for ships sailing along the Florida Reef, the Florida Keys, including the reef, and the waters to the west of the Keys, including Biscayne Bay and Florida Bay, were surveyed in the 1850s. The
Notes
- ^ The biggest coral reef in the continental U.S. is dissolving into the ocean Accessed May 6, 2016
- ^ Florida's Coral Reefs Florida Department of Environmental Protection Accessed December 14, 2010.
Florida Keys Conservation: National Marine Sanctuary Ichthyology at the Florida Museum of Natural History Archived 2010-11-23 at the Wayback Machine Accessed December 14, 2010
Precht and Miller:243
Marszalek et alia:224 - ^ U.S. Geological Survey Circular 1134 - Florida Reef Tract Accessed December 16, 2010
Precht and Miller:243
Marszalek et alia:228 - ^ U.S. Geological Survey Circular 1134 - Florida Reef Tract Accessed December 16, 2010
- ^ U.S. Geological Survey Circular 1134 - Florida Reef Tract Accessed December 16, 2010
- ^ Hardbottom Community Ichthyology at the Florida Museum of Natural History Accessed December 15, 2010
- ^ Patch Reef Community Ichthyology at the Florida Museum of Natural History Accessed December 15, 2010
Marszalek et alia:224, 227 - ^ Bank Reef Community Ichthyology at the Florida Museum of Natural History Accessed December 15, 2010
- ^ Common Corals of Florida Ichthyology at the Florida Museum of Natural History Accessed December 15, 2010
Coral Reefs Geographical Distribution Ichthyology at the Florida Museum of Natural History Accessed December 15, 2010 - ^ Precht and Miller:241, 246, 267
- ^ Lindsey, Rebecca (July 28, 2023). "NOAA and partners race to rescue remaining Florida corals from historic ocean heat wave". Climate.Gov. Retrieved August 10, 2023.
- ^ a b Kozin, Daniel; Lee, Wilfredo; Frisaro, Freida (August 9, 2023). "High ocean temperatures are harming the Florida coral reef. Rescue crews are racing to help". AP News. Retrieved August 10, 2023.
- ^ "The Disease Threatening Coral Reefs In Martin County". Stuart Magazine. Retrieved 2019-06-14.
- ^ Precht and Miller:243-44, 245, 247-48, 249
The State of Coral Reef Ecosystems of the Florida Keys Accessed December 17, 2010 - ^ Large-scale surveys on the Florida Reef Tract indicate poor recovery of the long-spined sea urchin Diadema antillarum Accessed December 17, 2010
Precht and Miller:249
The State of Coral Reef Ecosystems of the Florida Keys Accessed December 17, 2010 - ^ U.S. Geological Survey Circular 1134 - Coral Reefs and Sea Level Accessed December 16, 2010
- ^ Precht and Miller:266
- ^ The State of Coral Reef Ecosystems of the Florida Keys Accessed December 17, 2010
- ^ "The World Of Artificial Reef Systems Off South Florida's Shores". Palm Beacher Magazine. Retrieved 2019-06-14.
- ^ NOAA Coral Reef Conservation Program - Tourism and Recreation Accessed December 17, 2010
- ^ Socioeconomic Study of Reefs in Southeast Florida - Monroe County Accessed December 17, 2010
- ^ Socioeconomic Study of Reefs in Southeast Florida - Miami-Dade County Accessed December 17, 2010
- ^ Viele. Pp. 54-5
- ^ Langley and Parks:5
- ^ Blank:63
- ^ Viele 2001:3-14, 54-5, 166
Turner:27-8
Burnett:105
Facts about Monroe County Archived 2010-07-24 at the Wayback Machine Accessed December 17, 2010 - ^ Viele 1999:26-31, 92-94
- ^ "Historic Light Station Information and Photography: Florida". United States Coast Guard Historian's Office. Archived from the original on 2017-05-01.
- ^ Viele 2001:140, 154-59
United States Coast Guard Historic Light Station Information & Photography - Florida - American Shoal Light Accessed December 16, 2010 - ^ Blank:61-66
- ^ Agassiz, Louis. (1880) "Report on the Florida reefs." Memoirs of the Museum of Comparative Zoology VII:1. Harvard College. Accessed December 14, 2010
References
- Blank, Joan Gill. (1996) Key Biscayne. Sarasota, Florida: Pineapple Press, Inc. ISBN 1-56164-096-4
- Burnett, Gene. (1991) Florida's Past: People and Events That Shaped the State. Volume 3. Sarasota, Florida: Pineapple Press. ISBN 1-56164-117-0
- Langley, Wright and Arva Moore Parks (editors). (1983) "Diary of an Unidentified Land Official, 1855: Key West to Miami." Tequesta: The Journal of the Historical Association of Southern Florida. Number XLIII. Found at [1] Accessed December 19, 2010
- Marszalek, D. S., G. Babashoff, Jr., M. R. Noel and D. R. Worley. (1977) "Reef Distribution in South Florida." Proceedings, Third International Coral Reef Symposium. Rosenstiel School of Marine and Atmospheric Science, University of Miami. Found at [2] Accessed December 18, 2010
- Precht, W. F. and S. L. Miller. (2007) "Ecological Shifts along the Florida Reef Tract: The Past as a Key to the Future." In R. B. Aronson. (Editor) Geological Approaches to Coral Reef Ecology. Found at [3] Accessed December 16, 2010
- Turner, Gregg. (2003) A Short History of Florida Railroads. Charleston, South Carolina: Arcadia Publishing. ISBN 0-7385-2421-2
- Viele, John. (1999) The Florida Keys: True Tales of the Perilous Straits. Sarasota, Florida: Pineapple Press, Inc. ISBN 1-56164-179-0
- Viele, John. (2001) The Florida Keys: The Wreckers. Sarasota, Florida: Pineapple Press, Inc. ISBN 1-56164-219-3
External links
- "Coral reefs in Florida." The Encyclopedia of Earth
- "Florida's large artificial reef system" CCCarto
- Florida Fish and Wildlife Conservation Commission: Unified Reef Map
25°06′N 80°24′W / 25.1°N 80.4°W
- PMID 25708511.
- PMID 23951056.
- ^ "NOAA Coral Reef Conservation Program". coralreef.noaa. NOAA. Retrieved 13 April 2016.
- ^ Stevens, Alison Pearce. "Corals Dine On Microplastics". EBSCO. ." Science News For Students. Retrieved 13 April 2016.