EDGE :: Coral Reef Species Information
Surveys will be carried out at two different depths to compare EDGE coral depth preference, to provide information to the government on the effectiveness of MPAs, for EDGE corals. Mitochondrial and Nuclear Genes Suggest that Stony Corals are Monophyletic but Most Families of Stony Corals Are Not (Order Scleractinia, Class Anthozoa, Phylum Cnidaria)
9:07PM PDT on Oct 6, 2013 Cuba has healthy reefs because of the boycotts, they reverted to organic farming where there is none of the agribusiness style monoculture sediment and pesticide runoff. What amazes me are how few garbage cans they have and no recycle bins! August 9 flag as inappropriate why is this inappropriate? submit cancel Submitting..
WWF - Coral reefs: threats
Some pollutants, such as sewage and runoff from farming, increase the level of nitrogen in seawater, causing an overgrowth of algae, which 'smothers' reefs by cutting off their sunlight. Major threats to coral reefs and their habitats include: Destructive fishing practices: These include cyanide fishing, blast or dynamite fishing, bottom trawling, and muro-ami (banging on the reef with sticks)
Types of Coral Reefs: Atolls, Barrier Reefs, Fringing Reefs
This is especially true in the Caribbean region, where some of the fringing reefs are separated from shore by open waters that may reach 6-8m in depth and extend a kilometer or more from shore. The evolution of main types of coral reefs, as first proposed by Charles Darwin Darwin spent most of his coral reef explorations in the IndoPacific region, and viewed the three types of coral reefs he described as simply different stages in the geological 'evolution" of Pacific oceanic islands
Unfortunately, corals in areas more affected by human pollution, fishing, and sediment runoff had not recovered by 2006-2007 when we completed our field work suggesting that pollution exacerbates the effects of warming. To help the damage portions of the lagoon recover, Okamoto has been placing grooved ceramic disks in locations where they can serve as shelter for coral larvae when the reef corals spawn
EDGE :: Coral Reef Species Information
Research has been conducted into crown-of-thorns starfish outbreaks to understand their biology, spread and impact so that action can be taken to prevent or minimize future outbreaks. These habitats typically have high levels of suspended material in the water column and coral polyps remain extended throughout the day in order to best utilize these food resources
Coral Reefs - Marine Habitat Profile
The largest and most well-known example of a tropical reef is the Great Barrier Reef in Australia.Cold Water Corals:The more well-known tropical reefs are found in water ranging in temperatures from about 68-84 degrees Fahrenheit. Fishing: There are fishing techniques that can harm coral, such as cyanide fishing (divers squirt cyanide on the reef to stun fish, which are then caught for the tropical fish trade or for consumption) and blast fishing (fishermen use explosives, which destroy the coral)
Between 40 and 50 percent of all drugs currently in use, including many of the anti-tumor and anti-infective agents introduced during the 1980s and 1990s, have their origins in natural products. Because these compounds often come from rare or slow-growing organisms or are produced in minute quantities, collecting a target species in sufficient amounts for continued production of a new medicine may be unrealistic
WWF - Coral reefs
As thousands of communities across the world will tell you, coral reefs are essential not only to ocean health, but also to human health and well-being. Some pollutants, such as sewage and runoff from farming, increase the level of nitrogen in seawater, causing an overgrowth of algae, which 'smothers' reefs by cutting off their sunlight
Coral reef - definition of coral reef by The Free Dictionary
(Physical Geography) a marine ridge or reef consisting of coral and other organic material consolidated into limestonecoral reef A mound or ridge of coral skeletons and calcium carbonate deposits
Coral Reef Protected Areas: A Guide for Management
While often not distinguished, education and outreach activities can have distinctly different messages and concepts and be widely applied for different circumstances. At a scale of 1:5000, many reef features are visible, and if the photos are taken during calm and clear conditions, water clarity may allow resolution of major features to a depth of 60 feet or more
Coral reefs and climate change
Local Threats and Integrative Reef Management In addition to the global and regional effects of climate change, there are several localized threats and impacts to coral reef ecosystems. Climate Change and Coral Loss There are many causes of local and global coral loss but human-induced climate change is one of the main and undeniable threats
How and why do scientists survey corals reefs? There are many different ways for scientists to survey coral reefs and the different types of species that are found there. Some of these conservation organisations work locally, while other organisations have developed global initiatives such as Reef Check and the International Coral Reef Initiative, allowing scientists to share and compare the data they collect
Coral Reef Atlas
Tourism can become a force for good, giving an added value to reefs in the eyes of the local communities, and often providing a direct income, through park fees, for the management of marine protected areas. "UNEP, as secretariat to the Global Programme of Action for the Protection of the Marine Environment from Land-based Sources is trying to co-ordinate an integrated response to this problem
Coral bleaching occurs as coral tissue expels zooxanthellae, a type of algae that resides in the structure of the coral, and is essential to the coral's survival. Coral reefs -- the "rainforests of the oceans" -- support a variety of sea life and provide resources of significant economic importance such as fishing and recreation
NOAA's Coral Reef Conservation Program: Biodiversity
In terms of biodiversity, the variety of species living on a coral reef is greater than in any other shallow-water marine ecosystems and is one of the most diverse on the planet, yet coral reefs cover less than one tenth of one percent of the ocean floor. At several sites in the northeast Atlantic, 92 percent of fish species were associated with communities of Lophelia deep-sea corals rather than the surrounding seabed
NOAA CoRIS - What are Coral Reefs
Varying in width from 20 or 30 meters to more than a few thousand, the reef flat may range from only a few centimeters to a few meters deep, and large parts may be exposed at low tide. If these algal cells are expelled by the polyps, which can occur if the colony undergoes prolonged physiological stress, the host may die shortly afterwards
Coral Reef Info
The coral reef community lives only on the surface veneer of the reef, on top of already existing skeletal material left behind by previous reef-builders. The more technical definition of "coral reef" includes an additional geological requirement that the reef organisms produce enough calcium carbonate to build the physical reef structure
But by mimicking the nooks and crannies of real coral reefs, this Autonomous Reef Monitoring Structure (ARMS) attracts crabs, shrimps, worms, urchins, sponges, and many other kinds of marine invertebrates. Fish play important roles on coral reefs, particularly the fish that eat seaweeds and keep them from smothering corals, which grow more slowly than the seaweeds
Coral Reef Adventure
From natural poisons that can be used as painkillers to natural sunscreen compounds in corals that can prevent sunburns, researchers are finding numerous benefits to humans in coral reefs. Corals can survive occasional bleaching incidents, but they cannot recover from repeated or prolonged stress because they depend on the symbiotic algae for nutrition
Photo by Don Hesler Porcupinefish Photo by Don Hesler When confronted by a predator, the porcupine fish can inflate its body, which projects a prickly surface of spines. Stonefish, Thailand Photo by Don Hesler The Indo-Pacific Stone Fish, Synanceja horrida, is a member of the family Scorpaenidae and lives cryptically beneath rocks and within crevices
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