How much plankton is in the sea and How does so much plankton exist in the sea?
147319
There used to be a larger content of biomatter in sea water than there is currently, but it is safe to assume that a millilitre of sea water will contain organisms visible under the microscope. Chemically, this is the total organic carbon content of the water.\n\nThe main reason why there is so much life is the presence of great amounts of dissolved calcium hydrocarbonate, which will offer plants (algae) the matter to expand and which can be transformed by beast life.
293000
Hard question to answer.  i seem to remember a professor talking on this very subject so i will try and do him justice.\n\n1) surface tension of the phosopholipid bilayer cannot remain bound together once a cell reaches a certain size. another factor is genetic. the genome (depending on the cell type) has a pre determined size. once it is reache a phenominon called apoptosis or cellular suicide is activated bringing a wierd meaning to the welfare of the many outways the welfare of the one. anther aspect is environment.  depending on the cell and the environment it finds itself in, it must compete for for food.  larger cells need more food.  If the food source of the environment is scarce then it wil die as a result of starvation.  in biologic systems immune resppnse may play a significant factor in making the environment too hostile for life.  However lare single cell organisms do exsist.  I will not hand you the answer but I will give you a hint.  Look to Marine life..  good question!
622198
Phytoplankton are not plants, they are protists and belong to an entirley different kingdomto the plants. Moreover they are not a plant but hundreds of thousands of species of different species.\n\nThe most numerically abundant plant species on the planet is common wheat, Triticum aestivum. Thanks to human agriculture there are hundreds of millions of hecatres of the world covered with just this plant.\n\nThe most abundant plant species by mass are various widespread tree species. These are very hard to calculate precisely but Eucalyptus crebra, a type of Australian gum tree, is usually considered to have the highest biomass of any single species on Earth today.
248445
Primaraly sharks, I have actually seen a preserved Oarfish and it's tail was missing as if bitten of by a shark. The Oarfish is exceptionally rare and live upto 3000 feet deep! The Oarfish can be anywhere from 10 to 50 feet long, and weigh as much as 600 pounds. It lives in the tropical waters of the world (such as the gulf of mexico) and only venture ashore when sick or dying. I remember seeing a photo of a 23ft long Oarfish that washed ahore near a naval training base it was phenomenal. The Oarfish may have been the cause of the infamouse "sea serpents" that early sailors spoke of.It eats small fish, jellyfish, and zooplankton.It is of no danger to humans, and of no commercial value (thank goodness) because it's meat is rather gelatinous. I hope to see a live one some day because it is so mysterious: only until recently was a live one photographed in it's natural habitat. I truly hope I have aided you some form thank you for the oppurtunity to answer your question!
64688
How salty the ocean is, however, defies ordinary comprehension. Some scientists estimate that the oceans contain as much as 50 quadrillion tons (50 million billion tons) of dissolved solids.\nIf the salt in the sea could be removed and spread evenly over the Earth's land surface it would form a layer more than 500 feet thick, about the height of a 40-story office building.
440867
Many of the microorganisms in the pond water are actually plants.\n\nThe microscopic organisms living in the water column are usually refered to as plankton.  The phytoplankton are the microscopic plants, while the zooplankton are the microscopic animals.  The phytoplankton are the majority of the mass, mostly single celled algae and diatoms.
54541
We don't really know how many creatures live in the sea, so it would be impossible to guess how much cubic space would be made available by the removal of the animals. \n\nStill, there is so much water that the ratio of water to earth would still be approximately 3/4.\n\nAll Water on Earth:\n\nOceans__________________97.24%\nAll ice caps/glaciers________2.14%\nGroundwater______________0.61%\nFreshwater lakes__________0.009%\nInland seas/salt lakes______0.008%\nSoil Moisture_____________0.005%\nAtmosphere______________0.001%\nAll rivers_________________0.0001%\nTotal____________________100%
1115492
328 million gallons is a gross under estimate. If your estimate of suface area of 68 million square miles is correct.... and thre is 5280 feet in a mile... and 7.48 gallons (US liquid measurement)per cubic foot... that would mean there is 208.5 MILLION gallons of water in 1 square mile of ocean that was only 1 foot deep.\n\nA cubic mile of water contains 1,101,040,680,960 gallons of water... so IF the estimate of 68 million square miles of ocean is correct, and the ocean were and AVERAGE of 1 mile deep (and I assure you its deeper)  then there would be 74 million of TRILLIONs of gallons of water in the ocean... to spell that out ... 74,870,766,310,000,000,000 gallons of water in a body of water 68 million square miles in area and 1 mile deep... again.. this is if the estimates give were correct.\n\nHowever the given estimates are not correct... the ocean covers approximately 140 million square miles and has an average depth of 12,220 feet. which is just over 2 miles... so the actual calculation should look like this.... 5,280 x 5,280 x 12,220 x 140,000,000 x 7.48  giving you  a whopping 356,753,863,100,000,000,000 gallons of water contained in the worlds oceans... APPROXIMATELY\n\n... I had better get a best answer for this....
1033374
in some parts of the ocean it can be miles deep. the ocean covers 2/3 of the earth, and we find new species in it all the time. there are still many primitive species alive today, such as the shark and the horseshoe crab. they are species that are millions of years old. i think that there could be many more dinosaur related species yet to be discovered. it's completely possible.
1052027
I know some guys that work for NOAA and do fisheries statistics on the open water in the Pacific.  They ride along on commercial fishing vessels and count the different types and varieties of fishes and then plug their numbers into a preformatted excel program that has been designed to estimate population sizes based on biostats of the fishes (weight, age, color, etc).  I'll have to ask them next time I see them how their sampling model reflects population sizes.\n\nEDIT\n\nSo I ran into today, he said they measure the amount of area they cover in square miles and the amount of fish they take in said area.  Then they extrapolate to the whole Pacific Ocean.  He said that although it isn't an exact method, the year to year population averages of all the different fish populations don't vary much, even though they cover different areas and different sized areas each year.
7107
Well mostly the difference in colour of the oceans is due to the muddy and unclear waters. no waters have colour. But it is just the colour of reflection. Please see the site i am listing below. It is a q & a type forum only!!\n\n\nYou may get your answer here too!!\n\nWe see the water  great masses, seas, lakes, rivers, with colors: blue,  green, gray, \nsometimes brownish. But if one picks up a pot of that water the aspect is not colored.  \nSo the color is an optical phenomenon that is observed only when a large volume of water \nis considered and it depends on several things:\n-The water reflects the sky, so its color depends upon the sky colour at that time, and if \nit has white or grayish clouds.\n-At other hand  the water colour depends also from the material that is found  mostly into \nthe sea  water.\nThere are life there…animal and vegetal, a lot,included the  phytoplankton, microscopic \nplants that either float or are suspended there.  And of course there are  dissolved and \nsuspended also inorganic and organic matter coming from the sea floor and from rocks.   \nColor is the result of  optical interactions from the incident  solar light and the \nbillions of microscopic particles present.\nWhen the light of the sun reaches the sea surface different phenomena happen, part is \nreflected, part is absorbed and some is scattered. These phenomena happens with the water \nitself, the dissolved organic and inorganic matter and the suspended particles.\nThe colour of sea water depends upon  the distribution of these facts. It is blue for clear \nocean water and shifts to darker for less transparent or more turbid waters, and depends \nalso from the depth and transparency of the considered layer of water. And that colour can \nbe seen from space! That is why our planet Earth is called the "blue planet". Isn´t that \nwonderful?\nAnd thanks for asking NEWTON!
823698
too many nitrates is not good, because then you get a ton of algae growth and the algae uses up all of the oxygen causing the other organisms to die\ndont know bout the other question
446332
Depends entirely on the species of star fish.\n\nThere are about 1800 different species of sea star (Echinoderms of the Class Asteroidea) and they occur in all of the world's oceans.  Some are adapted to live in warm, coastal seas and coral reefs, others prefer deep, dark cold environs.\n\nThere are even some that are found around the super-heated waters of the deep sea hydrothermal vents also known as 'black smokers'.
221741
The density of seawater:\n\nhttp://hypertextbook.com/facts/2002/EdwardLaValley.shtml\n\nThe density of ice:\n\nhttp://www.elmhurst.edu/~chm/vchembook/122Adensityice.html\n\nThe figures for the world's volume of freshwater are available on a number of sites and in various texts.  Suffice to say that about 97% of the world's water is oceanwater, and some 80-90% of what's left over is frozen in the ice sheets.\n\n''With ice being significantly less dense than water will melted glaciers and ice mass really cause the ocean to rise? And even if that is so, would the volume of ice melting have to be incredibly dramatic to cause even a small rise?''\n\nDefinitely.  Sea ice will not contribute to rising sea level, but ice sequestered in glaciers will, because it was ultimately derived from the ocean.  The volume of melting would not have to be dramatic to make life interesting; if Greenland alone melted, that would raise sea level by some 20 feet.  A much smaller rise over the next century, of one to three feet, would still be disastrous for the most low-lying areas of the globe.
856576
Studies have shown that the mineral iron (but only in the proper amounts) can lead to increased blooms of many (though not all) kinds of phytoplankton (e.g. Boyd et al., 2000). Iron is primarily made available to oceanic phytoplankton through the deposition of atmospheric dust on the sea surface. Oceanic areas adjacent to arid parts of continents thus typically have abundant phytoplankton (e.g., the western Atlantic Ocean, where trade winds bring dust from the Sahara Desert in north Africa). It seems a paradox that arid land areas may actually contribute to increased plant life proliferation in the world's oceans. It has been theorized (but never actually attempted) that large-scale 'seeding' of the world's oceans with iron would generate such massive blooms of phytoplankton so as to draw enough carbon dioxide out of the atmosphere to counteract the Greenhouse Effect (or global warming) (Martin, 1990).
93113
Where they live:  "There are about 1,800 living species of sea star, and they occur in all of the Earth's oceans. The greatest variety of sea stars are found in the northern Pacific Ocean."\n\nWhat they eat:  "Some species take advantage of the great endurance of their water vascular systems to force open the shells of bivalve molluscs such as clams and mussels, and inject their stomachs into the shells. Once the stomach is inserted inside the shell it digests the mollusk in place."\n  \nGood luck! :)
128379
The most basic ground rule is that as energy flows from one trophic level (prey) to the higher level (predator) that about 90% of that energy is lost due to respiration.  So if 100 units of energy from phytoplankton are passed to zooplankton and then to small fish you would only get a 1 unit increase in the energy store in the small fish.  So the highest trophic levels have much less energy and are typically large organisms that are not very abundant.