This blog is DONE BY:

Names of pupils: Muhammad Danial Bin Mohd M,
Rudy Mikhal Bin Hardi

Class: Primary 5/3

Teacher-in-charge: Miss Emmeline Yu

Email: yu_minli_emmeline@moe.edu.sg

School: Dazhong Primary School

Our feelings AFTER we completed our blog

I am Rudy. After we completed the project, my feelings were happy of course! I had enjoyed this project. This is all i got........Yay me!!!

I(Danial) am back. After we done this blog, well I feel great! It is really good to be able to do this!

Our feelings BEFORE we started this blog

Hi I am Rudy. My feelings before we started this blog was very angry. It was because I quarrelled with my partner,Danial. On the first day, I did not care about the quarrel I had with Danial. I am only cared about doing the project properly. I know that our project was to search and find more information about coral reefs. I felt very lucky that Miss Yu chose me to do this project.Yay!!!

Hi, I am Danial. I had a fight with Rudy at the start of the project because I am a very sensitive person. Nevermind about the quarrel, because I just want to do this blog for environment for the Coral Reefs well. I feel very lucky to get choosen for this project.

(MIss Yu: Don't worry, the boys did manage to cool down and talk to each other again, and both of them continued happily with their project!)

Searching...Typing...Publishing

How do Coral Reefs reproduce?

Source: http://www.iyor.org/reefs/


Many coral species reproduce once or twice each year. Most coral species spawn by releasing eggs and sperm into the water, but the period of spawning varies from one species to another. When an egg and a sperm meet they form a larva known as a planula. The baby coral looks like a little tiny jellyfish and floats around near the surface at first, and then in the water column until it finds a suitable space to call home - usually a hard surface to attach to. Other limited distribution coral species are brooders. This is where only male gametes are released into the water, then taken in by female coral animals containing egg cells. Fertilization occurs inside the female coral, and a small planula develops inside it. This planula is released through the mouth of the female coral and drifts or crawls away to settle elsewhere and grow into a new colony.


Coral spawning happens at the same time each year and appears to be related to the lunar cycle. This allows scientists and divers the opportunity to observe this magnificent phenomenon, along with all the fish and predators that come to feed on them.

Where are coral reefs found?

Source: http://www.iyor.org/reefs

Coral reefs are found throughout the oceans, from deep, cold waters to shallow, tropical waters. Temperate and tropical reefs however are formed only in a zone extending at most from 30°N to 30°S of the equator; the reef-building corals prefering to grow at depths shallower than 30 m (100 ft), or where the temperature range is between 16-32oc, and light levels are high.



Based on current estimates, shallow water coral reefs occupy somewhere between 284,000 and 512,000 km2 of the planet (cold-water (deep) coral reefs occupy even more area). If all the world's shallow water coral reefs were crammed together, the space would equal somewhere between an area of land ranging from the country of Ecuador (the low estimate) to Spain (the higher estimate). This area-about 198 thousand square miles in an ocean of 140 million square miles-represents less than 0.015 percent of the ocean. Yet coral reefs harbor more than one quarter of the ocean's biodiversity. That's an amazing statistic when you think about it: no other ecosystem occupies such a limited area with more life forms.

Animals need the oceans too!

Animals which need the oceans:

Sea Otter

SeaGull

Seal

Whale

Aren't these animals cute? We must try our best to save the oceans as we will be saving these animals too!

Please help to protect the oceans and coral reefs!!

We need the oceans and reefs..

Source: Live Search

These two pictures show the beach where we can play and have fun! Aren't they beautiful? Can you imagine if our oceans and reefs are being destroyed? We will not have such beautiful beaches to have fun! It is really important that we protect our oceans and coral reefs!

Pictures of corals

The oceans are so beautiful

Status of and Threat to Coral Reefs

Source:http://www.iyor.org/reefs/status.asp

Why are coral reefs threatened?

The majority of reef loss or damage is not deliberate. Coral reefs are being degraded by an accumulation of stresses arising from human activities. In simple terms, stresses can be grouped by the actions of people extracting material from, and placing materials upon, coral reefs. Over-fishing, pollution and coastal development top the list of chronic stressors. In many situations chronic stresses are overwhelming the resilience, (or the capacity for self-repair), of reef communities. Some coral reefs are covered with sand, rock and concrete to make cheap land and stimulate economic development. Others are dredged or blasted for their limestone or to improve navigational access and safety. In addition to this, long-term changes in the oceans and atmosphere (rising sea temperatures and levels of CO2), and acute stresses from highly variable seasons, severe storms, earthquakes and volcanic eruptions also affect coral reefs.

So what are the different things we are doing to damage coral reefs?

-Over-fishing: Increasing demand for food fish and tourism curios has resulted in over fishing of not only deep-water commercial fish, but key reef species as well. Over-fishing of certain species near coral reefs can easily affect the reef's ecological balance and biodiversity. For example, over-fishing of herbivorous fish can also lead to high levels of algal growth. From subsistence level fishing to the live fish trade, inadequate fisheries management is forcing the decline of fish stocks. Choose seafood products that come from certified, well-managed and sustainable fisheries. Certified products are available at most supermarkets - check out the product label, or visit: www.fishonline.org.

-Destructive fishing methods: Fishing with dynamite, cyanide and other methods that break up the fragile coral reef are highly unsustainable. Dynamite and cyanide stun the fish, making them easier to catch. Fishermen say they have no other option if they are to compete with trawlers and overcome a smaller supply of fish because of previous over-fishing. These practices generally do not select or target particular fish species and often result in juveniles being killed in the process. Damaging the coral reef habitat on which the fish rely will also reduce the productivity of the area, with further impacts on the livelihoods of fishermen.

-Unsustainable tourism: Tourism generates vast amounts of income for host countries. Where unregulated however, tourism pressures can cause damage to the very environment upon which the industry depends. Physical damage to the coral reefs can occur through contact from careless swimmers, divers, and poorly placed boat anchors. Hotels and resorts may also discharge untreated sewage and wastewater into the ocean, polluting the water and encouraging the growth of algae, which competes with corals for space on the reef.

-Coastal development: The growth of coastal cities and towns generates a range of threats to nearby coral reefs. Where space is limited, airports and other construction projects may be built on land reclaimed from the sea. Sensitive habitats can be destroyed or disturbed by dredging activities to make deep-water channels or marinas, and through the dumping of waste materials. Where land development alters the natural flow of water, greater amounts of fresh water, nutrients and sediment can reach the reefs causing further degradation. Within the last 20 years, once prolific mangrove forests, which absorb massive amounts of nutrients and sediment from runoff caused by farming and construction, have been destroyed. Nutrient-rich water causes fleshy algae and phytoplankton to thrive in coastal areas in suffocating amounts known as algal blooms. Coral reefs are biological assemblages adapted to waters with low nutrient content, and the addition of nutrients favours species that disrupt the balance of the reef communities.

-Pollution: Coral reefs need clean water to thrive. From litter to waste oil, pollution is damaging reefs worldwide. Pollution from human activities inland can damage coral reefs when transported by rivers into coastal waters. Do your bit - do not drop litter or dispose of unwanted items on beaches, in the sea, or near storm drains.

-Global Aquarium Trade: It is estimated that nearly 2 million people worldwide keep marine aquariums. The great majority of marine aquaria are stocked with species caught from the wild. This rapidly developing trade is seeing the movement of charismatic fish species across borders. Threats from the trade include the use of cyanide in collection, over-harvesting of target organisms and high levels of mortality associated with poor husbandry practices and insensitive shipping. Some regulation is in place to encourage the use of sustainable collection methods and to raise industry standards.

How are corals affected by climate change?

-Coral Bleaching: Coral bleaching occurs when the symbiosis between corals and their symbiotic zooxanthellae breaks down, resulting in the loss of the symbionts and a rapid whitening of the coral host (thus the term "bleaching"). This is a stress response by the coral host that can be caused by various factors, but more severe and frequent cases are being caused by a rise in sea surface temperature (SSTs). If the temperature decreases, the stressed coral can recover; if it persists, the affected colony can die.

The impacts from coral bleaching are becoming global in scale, and are increasing in frequency and intensity. Mass coral bleaching generally happens when temperatures around coral reefs exceed 1oC above an area's historical norm for four or more weeks. Sea surface temperature increases have been strongly associated with El Niño weather patterns. However, light intensity, (during doldrums, i.e. flat calm conditions), also plays a critical role in triggering the bleaching response. If temperatures climb to more than 2o C for similar or longer periods, coral mortalities following bleaching increase.

Mass coral bleaching was not documented in the scientific literature before 1979; however, significant mass bleaching events have since been reported in 1982, 1987, 1992 and the strongest sea surface warming event ever recorded occurred in 1998, where an estimated 46% of corals in the western Indian Ocean were heavily impacted or died. In 2005 sea surface temperatures in the Caribbean were the highest reported in more than 100 years, and there was also significant coral bleaching following this warming. This year, coral bleaching is being reported in several locations around the world. If sea surface temperatures continue to rise, then the frequency and severity of coral bleaching will also increase, likely affecting the ability of coral reefs, as we have known them, to adapt and to provide many of the services that people rely upon.

-Rising sea levels: Observations since 1961 show that the average temperature of the global ocean has increased even at depths of 3000m (IPCC report), and that the ocean has been absorbing more than 80% of the heat added to the climate system. Such warming causes sea level rise and creates problems for low lying nations and islands.

-Ocean Acidification: This is the name given to the ongoing decrease in the pH of the Earth's oceans, caused by their uptake of anthropogenic carbon dioxide from the atmosphere. Although the natural absorption of CO2 by the world's oceans helps mitigate the climatic effects of anthropogenic emissions of CO2, it is believed that the resulting decrease in pH, (i.e. making the water acidic), will have negative consequences, primarily for oceanic calcifying organisms such as coral reefs.

What other causes are damaging coral reefs?

-Coral Disease: During the last 10 years, the frequency of coral disease appears to have increased dramatically, contributing to the deterioration of coral reef communities around the globe. Most diseases occur in response to the onset of bacteria, fungi, and viruses. However, natural events and human-caused activities may exacerbate reef-forming corals' susceptibility to waterborne pathogens.

More information is needed to identify the mechanisms by which most diseases kill their hosts, and how they are transmitted. The onset of coral disease has been shown to spread following coral bleaching events, so the evidence of a connection between warmer-than-normal water and coral disease is growing stronger. There is also evidence to indicate that low water quality increases incidence. It is critical that governments and managers continue their efforts to reduce (or stop) the effects of other major reef threats (sediments, pesticides, nutrients, over-fishing, etc.) while this scientific information is gathered, if we are to give coral reefs a fighting chance of survival.

-Crown of Thorns Starfish (COTs): The Crown of Thorns Starfish is a voracious coral reef predator. Populations of the COTs have increased since the 1970s and large outbreaks of starfish can occur wiping out huge tracks of coral reef. Few animals in the sea are willing to attack the spiny and toxic crown-of-thorns starfish, but some shrimp, worms and species of reef fish do feed on larvae or small adults. The decline of these predators, through over-harvesting and pollution, is one factor contributing to the rise in the population of the starfish.

-Alien invasive species: Species that, as a result of human activity, have been moved, intentionally or unintentionally, into areas where they do not occur naturally are called "introduced species" or "alien species". In some cases where natural controls such as predators or parasites of an introduced species are lacking, the species may multiply rapidly, taking over its new environment, often drastically altering the ecosystem and out-competing local organisms. The damage caused by invasive species can be devastating, through alteration of ecosystem dynamics, biodiversity loss, reduction of the resilience of ecosystems, and loss of resources, with environmental, economic as well as socio-cultural impacts.

What benefits do coral reefs have?

Source: http://www.iyor.org/reefs/benefits.asp

Coral reefs are often called the rainforests of the sea, both due to the vast amount of species they harbour, and to the high productivity they yield. Aside from the hundreds of species of coral, reefs support extraordinary biodiversity and are home to a multitude of different types of fish, invertebrates and sea mammals. Covering less than one percent of the ocean floor, reefs support an estimated twenty-five percent of all marine life, with over 4,000 species of fish alone. Reefs provide spawning, nursery, refuge and feeding areas for a large variety of organisms, including sponges, cnidarians, worms, crustaceans (including shrimp, spiny lobsters and crabs), molluscs (including cephalopods), echinoderms (including starfish, sea urchins and sea cucumbers), sea squirts, sea turtles and sea snakes.

Reef structures play an important role as natural breakwaters, which minimize wave impacts from storms such as cyclones, hurricanes or typhoons.

Also, their beauty makes coral reefs a powerful attraction for tourism, and well managed tourism provides a sustainable means of earning foreign currency and employment for people around the world, even in remote areas of developing countries.

Several attempts have been made to estimate the value of coral reefs in terms of dollars. Benefits from coral reefs can be categorized into 2 types: "direct use values" (fisheries and tourism industry), and "indirect use values" (benefit derived from coastline protection). According to a United Nations estimate, the total economic value of coral reefs range from US$ 100,000 to 600,000 per square kilometre per year (Source: UNEP-WCMC. (2006). In the front line: shoreline protection and other ecosystem services from mangroves and coral reefs. UNEP-WCMC, Cambridge UK. 33pp. Available online at http://www.unepwcmc.org/resources/publications/UNEP_WCMC_bio_series/24.cfm )

In summary, healthy coral reefs provide:

- Habitat: Home to over 1 million diverse aquatic species, including thousands of fish species.

- Income: Billions of dollars and millions of jobs in over 100 countries around the world.

- Food: For people living near coral reefs, especially on small islands.

- Protection: A natural barrier protecting coastal cities, communities and beaches.

- Medicine: The potential for treatments for many of the world's most prevalent and dangerous illnesses and diseases.

What are Coral reefs?

Source: http://www.iyor.org/reefs/

Hard corals extract abundant calcium from surrounding seawater and use this to create a hardened structure for protection and growth. Coral reefs are therefore created by millions of tiny polyps forming large carbonate structures, and are the basis of a framework and home for hundreds of thousands, if not millions, of other species. Coral reefs are the largest living structure on the planet, and the only living structure to be visible from space.


As we currently know them, coral reefs have evolved on earth over the past 200 to 300 million years, and over this evolutionary history, perhaps the most unique feature of corals is the highly evolved form of symbiosis. Coral polyps have developed this relationship with tiny single-celled plants, known as zooxanthellae. Inside the tissues of each coral polyp live these microscopic, single-celled algae, sharing space, gas exchange and nutrients to survive.

This symbiosis between plant and animal also contributes to the brilliant colors of coral that can be seen while diving on a reef. It is the importance of light that drives corals to compete for space on the sea floor, and so constantly pushes the limits of their physiological tolerances in a competitive environment among so many different species. However, it also makes corals highly susceptible to environmental stress.

Coral reefs are part of a larger ecosystem that also includes mangroves and seagrass beds. Mangroves are salt tolerant trees with submerged roots that provide nursery and breeding grounds for marine life, that then migrate to the reef. Mangroves also trap and produce nutrients for food, stabilise the shoreline, protect the coastal zone from storms, and help filter land based pollutants from run off. Seagrasses are flowering marine plants that are a key primary producer in the food web. They provide food and habitat for turtles, seahorses, manatees, fish and foraging sea life such as urchins and sea cucumbers, and are also a nursery for many juvenile species of sea animals. Seagrass beds are like fields that sit in shallow waters off the beach, filtering sediments out of the water, releasing oxygen and stabilising the bottom.

What are corals?

Source: http://www.iyor.org/reefs

Corals are invertebrate animals belonging to a large group of colourful and fascinating animals called Cnidaria. Other animals in this group that you may have seen in rock pools or on the beach include jelly fish and sea anemones. Although Cnidarians exhibit a wide variety of colours, shapes and sizes, they all share the same distinguishing characteristics; a simple stomach with a single mouth opening surrounded by stinging tentacles. Each individual coral animal is called a polyp, and most live in groups of hundreds to thousands of genetically identical polyps that form a 'colony'. The colony is formed by a process called budding, which is where the original polyp literally grows copies of itself.

Coral are generally classified as either "hard coral" or "soft coral". There are around 800 known species of hard coral, also known as the 'reef building' corals. Soft corals, which include seas fans, sea feathers and sea whips, don't have the rock-like calcareous skeleton like the others, instead they grow wood-like cores for support and fleshy rinds for protection. Soft corals also live in colonies, that often resemble brightly coloured plants or trees, and are easy to tell apart from hard corals as their polyps have tentacles that occur in numerals of 8, and have a distinctive feathery appearance. Soft corals are found in oceans from the equator to the north and south poles, generally in caves or ledges. Here, they hang down in order to capture food floating by in the currents that are usually typical of these places.

Beach Cleanup Completed by Our School

This Beach Cleanup that Dazhong Primary School did for our Community Involvement Program(CIP).

Our school would like everybody to save the reefs by not the littering in the sea because you know what? The reefs are dying!!!

International Year of the Reef (IYOR) 2008

Source: http://www.iyor.org/about/default.asp

Background information

Ten years ago, 1997 was declared the International Year of the Reef (IYOR). The first IYOR campaign was initiated in response to the increasing threats and loss of coral reefs and associated ecosystems, like mangroves and sea grasses.

IYOR 97 was a global effort to increase awareness and understanding of coral reefs, and support conservation, research and management efforts. IYOR 97 proved to be very successful, with over 225 organizations in 50 countries and territories participating, over 700 articles in papers and magazines generated, hundreds of scientific surveys undertaken, and catalyzed conservation and policy initiatives, as well as numerous local and global organizations dedicated to coral reef conservation. More information on IYOR 97 can be found here: http://www.publicaffairs.noaa.gov/coral-reef.html

Recognizing that ten years after IYOR 97 there continues to be an urgent need to increase awareness and understanding of coral reefs, and to further conserve and manage valuable coral reef and associated ecosystems, the International Coral Reef Initiative designated 2008 as the International Year of the Reef (IYOR 2008).

IYOR 2008 will:

- Strengthen awareness about the ecological, economic, social and cultural value of coral reefs and associated ecosystems

- Improve understanding of the critical threats to coral reefs and generate both practical and innovative solutions to reduce these threats

- Generate urgent action at all levels to develop and implement effective management strategies for conservation and sustainable use of these ecosystems.