There are three main types of reefs; fringing reefs, barrier reefs, and atoll reefs. Fringing reefs are the most common of the three as they grow directly from shore, surrounding the islands like borders along the shoreline. When a fringing reef continues to grow upwards from a volcano island that has sunken entirely below sea level, an atoll is formed. Atoll reefs are circular/oval shaped and has an open lagoon in its center. Barrier reefs are quite similar to fringing reefs as they also border a shoreline, but what makes it different to a fringing reef is that they don’t grow directly from the shore, but are separated from land by an expanse of deep water. This creates a lagoon of deep water between the shore and the reefs.
Hard corals or stony corals are primary reef building/hermatypic corals that have rigid skeletons made of calcium carbonate (CaCo3), which in crystal form is know as aragonite. Colonies of hard corals have many polyps cemented together by the calcium carbonate skeletons they create, and a layer of tissue covers the skeleton and connects coral polyps for distr...
Around the world, their are beautiful places called “the seven wonders of the natural world”. These sites are fantastic because of there fascinating views and the fact that they were naturally made, not by humans. One of these seven natural wonders of the natural world is the Great Barrier Reef. The Great Barrier Reef is located off the coast of Queensland, Australia. The Great Barrier Reef was formed by corals growing on submerged islands. The sea level then continued to rise, “leading to more corals growing and forming.” (Zimmerman). The Great Barrier Reef is “a mosaic of 2,900 individual reefs” and can be “seen from space and is not only the world's largest coral reef system but also the largest structure
In absence of calcium carbonate, coral and shellfish can’t survive. The ecosystem of ocean depends on these organisms because they offer a large source of food at the bottom of the food chain. They need to be abundant in order t...
Almost every one of us have heard and most of you have seen the Coral reefs but did you know what actually these are:
There are two kinds of Coral reefs, warm, shallow water reefs that require lots of sunlight and cold, deep ocean water reefs. All natural reefs are a combination of sedimentary rock and calcium carbonate. When we think of coral reefs we imagine the bright, sunny, white sand beaches of the Caribbean but the deep water reefs are inhabited by cold water coral. These coral reefs are created by carbonate secreting animals like black coral, hard coral and octocoral which are the type of coral you will find in the gulf (Georgian). Invertebrates such as algae, sponges and bryozoans, bivalves are some different types of organisms that build these reefs as well. Each of these reef builders are an important part of the reef ecosystem (Science).
Believe it or not the current pop culture surrounding the reef is environmental protection. This mean that people are trying to protect and cleanse the reef of toxic waste and such. And the reason that comes to mind as to why they are protecting the reef is because they would want to preserve such a mythical place from the bottom of their
Coral reefs are systems of large, underwater structures that are composed of the mineralized bodies of corals. These corals are a class of marine invertebrates known as Anthozoans, and belong to the phylum Cnidaria, and are thus related to sea anemone and jellyfish. Each individual coral animal is only a few millimeters in diameter, and a few centimeters in length. Due to their sessile nature, and their ability to reproduce asexually, they are able to construct, over many generations, massive colonies of genetically identical individuals. Additionally, they secrete a hard exoskeleton of calcium carbonate to support and protect their bodies, and it is from this process that the colony constructs what is known as a single coral “head.”
The reef is the is “also the largest structure on Earth made by living organisms” (Zimmermann). The Great Barrier Reef has many different types of reefs. Nearby Lizard Island, Great Barrier Reef Marine Park and Swain Reefs is a cresentic reef. A cresentic reef “shaped like crescents” (Zimmermann). The crescentic reefs are commonly found in the middle of the reef system. Bordering Cape York Peninsula, Princess Charlotte Bay and Cairns flat reefs can be found. Planar reefs which are the same as flat reefs can be found in the north and south parts Cape York Peninsula, Princess Charlotte Bay and Cairns. To the north of the Great Barrier Reef, the reef is twisty and narrow. When a reef is twisty and narrow, it is called a ribbon reef. The south of the Great Barrier Reef is a fringing reef. The south of the reef is very unusual, due to the fact the fringing reef is attached to the Whitsunday islands. Usually fringing reefs are not attached to any islands. Also, found all over the reefs are lagoonal reefs
Over the last century, [it is evident that] the current levels are beginning to impact organisms that make their shells out of the minerals aragonite and calcite…” (Bralower) “Coral reef[s] are highly vulnerable to ocean acidific...
A coral reef is a ridge formed in shallow ocean water by accumulated calcium-containing exoskeletons of coral animals, certain red algae, and mollusks. Coral reefs are tropical, forming only where surface waters are never cooler than 20° C (68° F).
Coral Reefs are said to be the “tropical rainforest” of the sea. They are home to over 25% of all marine life (http://coralreefalliance.org.stories/storyReader$77). Over the past few decades they have been subjected to destructive anthropogenic practices. Some of the major threats to coral reefs include sedimentation, water pollution, harmful recreational activities, and global warming. All of these things cause stress on corals and can potentially cause mortality. Corals are made up of two parts, a polyp and zooxanthellae. A polyp is a calcerous body that grows from a hard part of the ocean floor. Zooxanthellae is a photosynthetic algae which lives in the polyp and provide energy for themselves and the coral. In many cases, corals undergo “bleaching,” which is a process where corals lose the zooxantheallae or chlorophyll pigment, and turn white (Wilkinson et all). After bleaching corals can survive for several months. It is possible for corals to recover by hosting more zooxantheallae, but it can take between 5 and 50 years for them to recover completely (Wilkinson et all, 1999).
Coral reefs are limestone ridges built by tiny, coral animals called coral polyps. These reefs form when a single, free-swimming coral larva attaches itself to a rock or another f...
Soft corals are grouped in the phylum Cnidaria, class Anthozoa, and order Alcyonacea. Their distinguishing characteristic is that their polyps always bear eight tentacles which are on both edges fringed by rows of pinnules (Fabricius and De’ath, 2002). The common name “soft coral” comes from the fact that they have no massive external skeleton as compared to the more commonly studied hard corals.
The corals use these products to make proteins, fats, and carbohydrates, and produce calcium carbonate. The calcium carbonate is what the coral uses to make its hard skeleton. The coral reefs of the world are of vast importance because they host 25% of all marine life on the planet.
These reefs provide a house for many species. If the coral reefs were to become
There are examples of corals reefs found all over the Earth in tropical environments. These reefs are divided into three categories; fringing, barrier, and atolls. Fringing coral reefs are relatively close to land and unlike other reefs they do not have a lagoon area. These reefs are frequently found in the Caribbean. In the Caribbean, the Netherlands Antilles is a popular hot spot for diving is Bonaire. At this cor...