what are the manta ray's effect to the ocean?
351606
Manta rays (Manta birostris) feed on plankton by filter feeding:  water coursing through their open mouths as they swim is strained for the various little critters floating in the water.  Filter feeding is quite common in marine environments, sustaining creatures as large as whale-sharks and basking sharks, and as small as barnacles and tube worms.\n\nBecause they are so large (average 'wingspan' of about 12 feet), not much preys on Manta Rays.  Large predators such as Tiger Sharks might take a few, but by far the largest predator on Manta Rays are humans.  They were virtually wiped out in many areas during the 90s by over-fishing, as their meat is apparently quite tasty, and their rough sandpapery skin is also useable for leather.\n\nVery little is known of the life of Manta Rays in the wild, and no one has successfully kept any alive in captivity for more than about a month (although they keep trying).
131167
Ah! that happens like one time per some 100 years!!!\nAnd besides, it will 75% chance hit the ocean! And no tsunami! And, the moon is a shield. It protects 15% of the hits! And theres a 5% chance that it will hit near you. So its a -5% chance you will "get scared" of a metor hitting Earth. I did the math!
89038
Also pressure from cold water sinking in some areas, thus causing it to rise in others, such as the Peruvian coastline (produces La Niña), the ac5tion of prevailing winds on both warm and oold surface waters.  Also water entering the oceans from large rivers such as the Amazon and Mississippi, and also salt concentration (dense water sinking).\n\nTidal currents are caused by the combined effects of the sun and the moon, the strongest when their effects combine.\n\nHeat and cold also affect water density, causing the ocean suface to be higher in hot areas and depressed in cold areas.\n\nGenerally these effects keep water circulating.  Some lack of movement is possible where all are missing from a given area, such as the Sargasso Sea.
68767
A tsunami is the movement of the entire water column from the floor of the sea to the surface.  In deep water, the visible effect may be as little as a surge in the surface.  A tsunami may pass under a ship without the ship even being aware of it.\n\nThe destructive effects of a tsunami do not occur until the ocean floor becomes shallow causing the water column to pile up and become the large wave that is associated with tsunamis.
198040
i think the in the seas near australia\nmany shark attacks have been reported from those parts
527030
The ocean water can get too hot and kill the animals that live in it because deadly algae and other things grow and kill dolphins and whales etc. Then fish will die and the food chain can go off wack and everything can get messed up and hurt the  animals.
552585
Oceanic currents are part of the global system of circulation that distributes the Sun's energy (including warmth) in the planet. Just like the wind currents transport warmer and colder air masses, oceanic currents distribute colder water from the poles to lower latitudes (cold currents are usually deep because cold water sinks under warmer water masses), and warm water from intertropical areas gets transported to higher latitudes (surface currents). \nOceanic currents also differ in their salinity (salt concentration) levels, which is also very important for aquatic organisms as well as for the global circulation, because salinity affects the freezing point of water. Therefore, oceanic currents affect the normal formation of ice, which also affects neighboring land masses and in turn alters the global circulation. \n\nThe influence of oceanic currents is especially important in coastal areas, but the amounts of energy transported by oceanic currents equals the transport by wind currents, and can affect temperature/precipitation balances throughout the world. El Niño (it's complete name is ENSO - El Niño Southern Oscillation) is a good example of the way a change in an oceanic current can alter land climate, e.g. causing droughts.\nAnother example is the Gulf Stream which "warms up" the North Atlantic Ocean and northeaster Europe.\n\nAbout the El Niño-La Niña cycle (ENSO):\nhttp://www.cdc.noaa.gov/ENSO/
1055387
deforestation removes the protective layers of the earth ,and the soil dries out by the sun ,if the land has been used for agriculture ,the now dry and dusty soil impregnated with agro chemicals (.including pesticides) ,are easily washed into the rivers by the rains.\nhere the mud effects aquatic life because the waters PH levels are  raised in acidity.\nwhich can affect sexuality as well as kill marine life.\nso most of the Damage is in the rivers and coastal areas and lagoons.\nby the time it all reaches the seas things are too diluted to have a marked difference.\n\nbut there are always limits to tolerance .\nif things go on long anough and in increasing quantities ,the life in the sea will also be affected .it already has with the red killer algae(Red tide),a result of chemical contamination
876174
A tsunami is a wall of water generated by an underwater earth-quake. It is not related to the atmosphere in any way, and has no impact on climate in any way.
97758
Nobody knows, and anybody who claims they do know are talking nonsense.\n\nPeople have put forwards lots of theories, from the pods trying to rescue sick members who have beached themselves to the effect of marine sonar or pollution. The problem is that no theory fits all the known records of beachings.\n\nWe can rule out all technological and therefore most human causes simply because whale beachings have been recorded regularly for the past 1000 years at least, and sporadically before that. Taking into account the extent of reportage and so forth before the popularisation of newspapers it appears that beachings haven't increased or decreased since Jesus was a boy. If pollution, sonar or other human pollution is having any effect on whales it isn't affecting beachings.\n\nThe idea that sick animals are beaching theselves and drawing in the rest of the pod seems slightly more plausible. The only problem is that several individuals becah themselves round the world every week and their pods don't follow them in. So why does it only happen sometimes? We then have the added problem that the beachings are quite often mass events. A beach will be deserted and then covered in whales half an hour later. That is highly implausible if it were caused by sick animals wandering onto the beach and the others wandering in after it. It seems to be a concerted effort. \n\nThe sick animal idea also doesn't account for the fact that whales that do float free either naturally or with humans assistance often beach themsleves again within days on  another beach.\n\n\nWhales probably beach themselves for lots of reasons. Sometimes it is because they simply don't see the beach until it is too late, sometimes they probably are trying to aid a comrade, sometimes the pod may have been posioned by human pollution or simply a red tide, sometimes they are chased onto the beach by charks or killer whales and so forth. Trying to assign one cause to whale beachings is like trying to assign one cause to cats getting stuck in trees or one cause to people having car accidents. Each case is unique with unique contributing factors.
16446
Since 70% to 75% of the Earth's surface is water, I would think it would make less of an impact than if they were just left on land.  There are so many billions of ocean creatures that would flourish off the food supply that would be provided by such a terrible catastrophe.
860854
The average Ocean pH is slightly on the caustic side.\n\nThis enables the growth of coral reefs which are basically composed of Calcium Carbonate.\n\nCoral reefs provide a haven for marine life which in turn provides food for not only for other marine life but also provides food for humans.\n\nDeforestation by Third World countries contributes to the increase of atmospheric Carbon Dioxide which in turn makes the oceans more acidic.\n\nThis is far more that all the carbon dioxide produced by world industry.\n\nThis, unfortunately, is either not known or not admitted to, by the "Kumbaya" wing of the Democrats or the Major Media.
92893
You need to concentrate your answer in the following areas:\n\n1) The effect of oceanic circulation.\n2) The role of water vapour as a greenhouse gas.\n3) The role of water as ice and cloud in increasing albedo\n4) The role of water in oxygen production, and hence the effect of oxygen on climte.\n5) The effect of life on albedo.\n6) The role of oceans as heat sinks and atmospheric buffers.\n\n\nWater also has a lot of small scale effects on climate of course, but I'm assuming you really do mean global climate.\n\n\n\n>>>>> countries which are surroended by large bodies\n>>>>> of water have more amount of rainfall than those \n>>>>> countries who are surrounded by land.\n\nNot at all. Australia and the Galapagos islands for example are surrounded by large bodies of water and both are primarily desert. Likewise Antarctica is surrounded by large bodies of water and is the driest place in Earth.\n\nIn contrast Switzerland and Paraguay are both completely landlocked countries that recieve large amounts of rainfall.\n\nWhile it is very broadly true that rainfall decreases with distance from the coastline there is ismply no way to extend this to making comparisons between countries or regions. Many coastal regions are far drier than many central continental regions. Ther are just  too many factors at play to make generlistaions about the effects of oceans on rainfall.
524594
They are caused by earthquakes, so are not influenced by the weather. For damage, see  http://www.tsunamispecialenvoy.org
1020525
Salinity will decrease a bit, but it won't be very significant.  \n\nLower salinity fish might move out of their environments and colonize other parts of the oceans.
262431
Actually many mammals were recorded as fleeing to higher ground before the tsunami, even before the water's edge starts receding (best way to tell if a tsunami is coming). The earth vibrates at a constant frequency, which is not noticeable to humans, but still effects us (a result of natural selection). Animals however can sense changes in the frequency, which is directly determined by local shifts such as the weather. That is why animals seem to have a certain prescience concerning the weather.
1071883
it already has had a major effect.  it caused all the hurricanes last summer to be so bad and killed thousands of people in the gulf coast region... i would say that is a major effect on people.