It is important that coral reefs recover once they have been damaged, some of the consequences are; less diverse reef communities, decline in fisheries, tourism and coastal protection (Hoegh-Guldberg et al, 2007). There are 5 potential predictors for how well a coral reef will recover after bleaching (Graham, Nash & Kool, 2011). Firstly, the reef characteristic, if the skeleton of the reef is still present it is likely to maintain ecological processes and therefore recover rapidly (Graham, Nash & Kool, 2011). Secondly, the connectivity of the reef, high connectivity of coral reefs is important for recovery, isolated reefs are more likely to have a slow recovery (Graham, Nash & Kool, 2011). Thirdly, the ecological characteristics of the reef,
Corals under stress due to changes in PH levels or temperature of the water will expel the algae (zooxanthellae) living within their tissues causing the coral to turn completely white. This is called coral bleaching. Another cause of coral bleaching is produced formation water, an effluent of offshore oil and gas industries that cause significant bleaching ( White et al .2012) .When a coral bleaches, it is not dead. Corals can survive a bleaching event, but they are under more stress and are subject to mortality. Mortality amongst corals has appeared to be the breakdown of the symbiotic association between the zooxanthellae and the coral host.
Dr Tracy Ainsworth stated “it is very likely that these microorganisms play a vital role in the capacity of coral to recovering from bouts of bleaching caused by rising temperatures.” Corals rely on these good bacteria’s crucially although we don’t yet understand these microbe’s ell enough to know how they influence coral survival, which is vital in maintaining the food web of the Great Barrier Reef. These good bacteria as well as other decomposers break down dead organics material and turn nutrients to the sediment. This energy is then obtained by the producers and the cycle begins
However, all bioluminescence are utilized for similar reasons as it allows marine species to communicate, attract prey and mate at the depths of the ocean. The way for marine creatures to control the luminescent light is by the density of the bacterial population to form colonies. When a certain density of bacteria is reached, this cause the luminescent light produced. If creatures want to shut down the luminescent light, bacteria will be released out. However, the density of the bacterial populations is influenced by the oxygen and nutrient provided by the host that can result in slower growth rates if oxygen and nutrient levels are not maintained.
If the A.tenebrosa was not able to withstand the strength of the ocean’s waves as they crash into the intertidal zone then the organism would be swept away with the tide off the rocks. The final abiotic factor that I wish to discuss effecting the actinia tenebrosa is light intensity. Light intensity caused from the sun has a large effect on this species. The A.tenebrosa, if exposed to high levels of light intensity, would dry out rather quickly due to the intensity of heat and light from the sun. To avoid this the A.tenebrosa lives under crevices, gullies or other rocks which are damp and usually shaded to avoid desiccation caused by the sunlight.
This will lead to cell function disruption where essential organs are dehydrated and are unable to metabolize. Therefore, the sea star is considered as a poor osmoregulator as it cannot adapt to different level of salinity. Osmosis is important to regulate water equilibrium allowing nutrients to be absorbed and wastes to be removed from
There are withal hindrance reefs, which are related to bordering yet dissevered from terrain with a tidal pond. The quantity of hindrance reefs is extraordinarily augmenting because of ecumenical warming, in light of the host of the water 's level. Hindrance reefs develop best where the area is sinking a greater number of speedy than the dihydrogen monoxide. The most well-known obstruction reef is the Great Barrier Reef in Australia, which compasses more than 2,000 kilometers. The third kind of coral reef is the atoll.
A. Underwater leaves: This kinds of leaves often exist on the plants whose whole body grow underwater in the water stream. As some region in water stream is deep, which is about 4-5metres, so the light diffused to the bottom is few. In order to absorb sufficient defused light, this kind of leave is very thin and just appear as strands of algae so as to increasing the surface area for absorbing maximum amount of sun light. B.
Away from earth it is usually a gas. This moisture is a blessed treasure, and it is our basic duty to preserve it.” This means that we need to have marine biologists to help preserve the water and the world below it. Being a marine biologist means that you are willing to help not just animals but the world and the water we drink. As a marine biologist there are many opportunities and many risks to take. I know that when I grow up I want to become a marine biologist to help the Earth.
Grazer species Grazer species are especially important in coral reefs. Their principal tasks include the modification of primary production to fish-based trophic pathways, the mediation of competition between corals and microalgae, and the provision of an appropriate settlement base for new corals (Hughes 1994). Thus, coral reefs without grazer species often end up covered by algae. Due to the degradation of coral reefs, populations of reef fish that perform key ecological functions such as grazer species decline, which then initiates a positive feedback and causes more coral reef degradation (Pratchett et al. 2014).