Coral reefs and island formation 500 million people worldwide depend on reefs, 30 million are totally dependent on them for food. Corals, with their stunning myriad of colors and depth, often introduce a whole new level of aesthetic to your tank. They closely border the coastline or are separated from it by a narrow stretch of water. Pdf slides of all the environment videos, 700 slides for free video lectures and st. Background information reef types bathymetric features of the oceans floor coral reef geomorphology.
Just as there are different types of corals, there are different types of coral reefs. Corals and coral reefs a free powerpoint ppt presentation displayed as a flash slide show on id. Phylum cnidaria class anthozoa corals, sea anemones, sea pens. Powerpoint presentation for duel enrollment enc 1101 class. Even the coral are like buildings full of small animals called polyps. Threats to coral reefs natural and human threats from nature unusually strong waves such as those from a hurricane water temperature changes dramatic changes in saltiness of water predators, such as snails and crown of thorns starfish overgrowth of algae coral eating snails crown of thorns starfish threats from humans pollution sediments block light from zooxanthellae chemicals either poison. Vaughan 1917 has defined coral reef as a ridge or mound of lime stone, the upper surface of which is near the.
They have some similarity to the advanced stages of the fringing reefs though they contrast primarily in size. Fringing reefs lie near the shores of islands or continents. Their bright, vivid colors can be seen in tropical ocean waters around the globe. Teacher will need to source material on threats to reefs and management solutions. This is the most common type of coral reef and are continuous with the land mass. Reefbuilding corals have evolved an essential symbiotic relationship with a type of brown algae called. Fringing reefs are the most common type of reef that we see. Aug 23, 20 for reef tank owners, adding corals to your tank is one of the most exciting experience. Coral have different structures that function to enable its survival. Ppt corals and coral reefs powerpoint presentation.
Mar 25, 2015 distribution of coral reefs in various oceans persian gulf and red sea contain a small percentage of worlds coral reefs indian ocean24% of the worlds coral reefs. In the last few decades, over 35 million acres of coral reefs have been obliterated. These bind together coral, sand and pieces of rubble to form a more solid structure known as the reef. Types of corals types of reefs is the property of its rightful owner. Volcanic island with a welldeveloped barrier reef lagoon system. Coral reefs are found in shallow waters of the ocean. It can be attached to the shore or there may be a narrow strip of water called a lagoon or channel between the land and the coral reef.
However, with the many different types of corals available, it can be quite the daunting tas. Types of coral reefs and its distribution slideshare. Barrier reefs are some of the most wellknown types of coral reefs and are located in varied regions of the world. These do best in areas with little rain and low land run off. They cover less than one percent of earths surface, but are home to one quarter of known marine fish species. Coral reefs are one of the most biologically diverse ecosystems in the world they occupy less than 1% of the ocean floor, but are inhabited by at least 25% of all marine species. Reefs protect coastlines from storms and erosion and provide habitat, spawning and nursery grounds for economically important fish species.
Instructional objectives i can describe the living conditions coral reefs need to develop and survive. A coral reef may grow into a permanent coral island. Fringe reef fringe reefs grow close to the shore line. Most coral reefs are built from stony corals, whose polyps cluster in groups. Coral reefs are the most diverse of all marine ecosystems. Such fringing reefs are found along sakau island, southern florida, mehetia island of society group of islands etc.
Hard corals remove calcium from surrounding seawater and use this to create the carbonate structures that form the reefs. Coral is a general term used to describe several different groups of animals in the phylum cnidaria. Coral reefs and climate change coral reef ecological. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Coral reefs are full of many types of plants and animals. Corals and coral reefs is the property of its rightful owner. The three main types of reefs are fringing reefs, barrier reefs and atolls veron, 2000. Dec 08, 2016 powerpoint presentation for duel enrollment enc 1101 class. Barrier reefs follow coastline but are separated by lagoons. Its home to countless species of colourfull fish, molluscs and starfish, plus turtles, dolphins and sharks. Coral reefs are important recreational resources for most of the worlds people having the privilege of living near them. Lesson looking at the importance and protection of coral reefs around the world. Threats to coral reefs natural and human threats from nature unusually strong waves such as those from a hurricane water temperature changes dramatic changes in saltiness of water predators, such as snails and crown of thorns starfish overgrowth of algae coraleating snails crown of thorns starfish threats from humans pollution sediments block light from.
This relationship with land is used to categorize the different types of coral reef. Scientists estimate that there are one to eight million undiscovered species living in and around the reef. Such losses often have a ripple effect, not just on the coral reef ecosystems themselves, but also on the local economies that depend on them. Disturbances affecting coral reefs include human caused and natural events. Ppt types of corals types of reefs powerpoint presentation. Detailed explanation about how the three different types of coral reefs are formed. Types of reefs there are three main types of reefs. Iucn international union for conservation of nature ecosystems and livelihoods group asia, iucn. The great barrier reef has more than 2,600 kinds of coral altogether. Additionally, certain types of fishing gear can inflict serious physical damage to coral reefs. Coral belongs to the class anthozoa in the animal phylum cnidaria, which includes sea anemones and jellyfish. Barrie r reefs are similar to fringing reefs in that they also border a shoreline.
Within the group of coral species used for jewellery there is also a wide range of habitat conditions. Coral reef, ridge or hummock formed in shallow ocean areas by algae and the calcareous skeletons of certain coelenterates, of which coral polyps are the most important. For both coral types, over time they form extensive reefs. Called rainforests of the sea, these coral reefs are home to a quarter of all marine species, provide habitat and breeding ground for commercially important species, provide natural buffers to the coastlines from erosions, and contain the highest. Introduction to the different types of corals coral. Coral reefs its types and distribution rehana raj dfk 7 i ph. Hence, these are supposed to be the principal builders of coral reefs though there are certain other contributors also. Called rainforests of the sea, these coral reefs are home to a quarter of all marine species, provide habitat and breeding ground for commercially important species, provide natural buffers to the coastlines from erosions, and contain the highest biodiversity of. This creates a lagoon of open, often deep water between the reef and the shore. There are a multitude of coral species found in the world, and they live in very different habitats and depths. Thirtytwo of the 33 animal phyla are found on coral reefs, compared with nine in tropical rain forests. Iucn international union for conservation of nature coral reefs. The largest coral reefs off the coastal platforms but parallel to them are called barrier reefs fig. Local communities often support coral reef conservation in order to raise income potential associated with tourism andor improved resource levels.
Types of coral reefs coral reefs are broken down into 3 main categories. The impacts from unsustainable fishing on coral reef areas can lead to the depletion of key reef species in many locations. Introduction to coral reefs introductionrationale coral reefs are known as the rainforests of the sea. Though they may look like colorful plants, coral are in fact made up of tiny animals called polyps. Queensland, australia unesco world heritage site inscription. Fringing reef barrier reef atoll by using hand drawn diagrams and images to four kinds of coral reef tiny coral polyps build the massive structure of the reef. They teem with life, with perhaps onequarter of all ocean species depending on reefs for food and shelter. A fringing reef is a reef that forms around a land mass. Their most distinguishing feature is that they are isolated from the shores by a lagoon of considerable depth.
Beyond their brilliant appearance lies a hidden significance. Nov 15, 2019 the three main types of coral reefs are fringing, barrier, and atoll. Most of the substantial coral reefs found today are between 5,000 and 10,000 years old, according to coral. Barrier reefs are the largest, most extensive, highest and widest reefs of all types of coral. The great barrier reef check out great barrier reef marine park authority to see whats going on. Coral reefs can have different sizes, shapes, and colors. Background information reef types bathymetric features of the oceans floor coral reef.
Distribution and conditions of coral reef formation 3. Introduction to the different types of corals coral forum. If so, share your ppt presentation slides online with. Aug 17, 2017 coral reefs theory, types, formation 1. This website and its content is subject to our terms and conditions. Reef types quiz reef types this lesson is a part of the reef types unit, which explains bathymetric features of the ocean floor and how this relates to coral reefs.
Other types apart from an atoll, fringing reef and a barrier reef, other coral reefs remain. Atolls usually form when islands surrounded by fringing reefs sink into the sea or the sea level rises around them these islands are often the tops of underwater volcanoes. Coral reefs are home to over 25 percent of all marine life and are among the worlds most fragile and endangered ecosystems. Scientists generally divide coral reefs into four classes. General characteristics coral reefs are built from the remains of stony. This kind of association where two different kinds of organisms benefit from each other is called a mutualistic association.
The polyps live together and work together to build the coral that is their home. The three main types of coral reefs are fringing, barrier, and atoll. Below is a summary of what is included in the entire unit. Reef types great barrier reef national oceanic and. Coral reefs threats and conservation in an era of global change bernhard riegl,a andy bruckner, b steve l.
This type of reef grows seaward directly from the shore. They form borders along the shoreline and surrounding islands. Distribution of coral reefs in various oceans persian gulf and red sea contain a small percentage of worlds coral reefs indian ocean24% of the worlds coral reefs. Sea turtles, jellyfish, sharks, and dolphins all live in coral reefs. Dodgea anational coral reef institute, nova southeastern university, dania, florida, usa bkhaled bin sultan living oceans foundation, landover, maryland, usa cbishop museum, honolulu, hawaii, usa. This 14slide ppt discusses where coral reefs are located, basic information about coral reefs and problems facing coral reefs today. Coral reefs basic information, types, exampal, condition for formation powerpoint ppt presentation free to view. These invertebrates can range from the size of a pinhead to a bit. Through a powerpoint presentation, students are introduced to coral reef habitats, reef zones and types of coral common in hawaii. Due to their unique complexity and diversity, coral. Schools of colorful pennantfish, pyramid, and milletseed butterflyfish live on an atoll reef in the northwestern hawaiian islands.
All together, it covers an area about half the size of texas a coral reef is home to alot of sea animals and plants. Fringing reefs grow near the coastline around islands and continents. Dodgea anational coral reef institute, nova southeastern university, dania, florida, usa bkhaled bin sultan living oceans foundation, landover, maryland, usa. Fringing reefs fringing reefs are coral reefs that grow in shallow waters. They are separated from the shore by narrow, shallow lagoons.
Ppt corals and coral reefs powerpoint presentation free. In the modern era, coral reefs passes and channels provide safe navigation chan nels for boats, and harbors are often sighted on reefs because they provide natural protection from. Zooxanthellae algae require sunlight for photosynthesis, and coral reefs usually begin to form in clear, shallow waters near land because water gradually filters out sunlight with depth. Often called the rainforests of the sea, coral reefs are home to a spectacular variety of organisms. Types of coral reefs there are three main types of coral reefs.
The year in ecology and conservation biology, 2009 coral reefs threats and conservation in an era of global change bernhard riegl,a andy bruckner,b steve l. Iucn international union for conservation of nature. Lesson 1 an introduction to the coral reef habitat lesson at a glance students create concept maps to determine the basic needs of organisms for survival. Types of reefs and reef formation university of hawaii. A coral reef is an underwater ecosystem characterized by reefbuilding corals. This would be great to use for an ocean unit as the graphics are visually stimulating. Jun 29, 2015 to download environment pdf slides click here. Coral reefs and climate change free download as powerpoint presentation. This is a remarkable statistic when you consider that reefs cover just a tiny fraction less than one percent of the earths surface and less than two percent of the ocean bottom. A coral reef, in fact, is a ridge of limestone whose upper surface is just below the sea surface and it is exposed at low tides. For reef tank owners, adding corals to your tank is one of the most exciting experience.