How do wetlands like estuaries help humans?
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Wetlands are essential to maintain the balance of the hydrologic cycle; they offer large surface areas of water and thus regulate the amount of water that flows, evaporates and eventually falls down again as rain. In addition, a wetland such as an estuary is the boundary between the sea and the land; they can buffer the influence of the tides and sea currents, and are usually very productive areas (that is, if pollution does not degrade them).\nEspecifically for the San Francisco area, here´s a link to the site for the San Francisco Bay reserve, they discuss the benefits and problems of the area:\nhttp://nerrs.noaa.gov/SanFrancisco/welcome.html\n\nand the local Wetlands Regional Monitoring Program:\nhttp://www.wrmp.org/\n\nand
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Delta\nA delta is a landform where the mouth of a river flows into an ocean, sea, desert, estuary or lake, building outwards (as a deltaic deposit) from sediment carried by the river and deposited as the water current is dissipated. Deltaic deposits of larger, heavily-laden rivers are characterized by the river channel dividing into multiple streams (distributaries), these divide and come together again to form a maze of active and inactive channels\n\n Estuaries\nEstuaries are aggrading depositional sedimentary bodies at the mouths of rivers. Many present river mouths became estuaries after the post-glacial sea-level rise inundated the former deltas. When that happened, fluvial channels became subject to tidal influence. Especially in meso- and macro-tidal regimes, the fluvial processes became subordinate to marine redistribution and tide-dominated estuaries could form.
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humans- stress,health, emotional effects, financial effects, humanity comes intoplay here with people helping people\n\nenviroment- new growth, polution(the ash in the sky), migration of wildlife(have 2 move to find food),
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to maximize surface area for the collection of sunlight and minimize weight and material used. also, yes it helps transport water and nutrients.
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Fresh water creates a hypotonic environment for aquatic organisms. This is problematic for some organisms, whose cell walls will burst if excess water is not excreted. Some protists accomplish this using contractile vacuoles,[2] while freshwater fishes excrete excess water via the kidney.[3] Although most aquatic organisms have a limited ability to regulate their osmotic balance and therefore can only live within a narrow range of salinity, some fishes have the ability to migrate between fresh water and sea water.\n\nAs with many aquatic animals, most fishes release their nitrogenous wastes as ammonia. Some of the wastes diffuse through the gills into the surrounding water. Others are removed by the kidneys, excretory organs that filter wastes from the blood. Kidneys help fishes control the amount of ammonia in their bodies. Saltwater fish tend to lose water because of osmosis. In saltwater fish, the kidneys concentrate wastes and return as much water as possible back to the body. The reverse happens in freshwater fish, they tend to gain water continuously. The kidneys of freshwater fish are specially adapted to pump out large amounts of dilute urine. Some fishes have specially adapted kidneys that change their function, allowing them to move from freshwater to saltwater
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It helps with the environment in many different ways such as increasing the annual rainfalls, keeping the environment cool, and decreases the ratio of wind evaporation which saves the atmosphere from becoming dry. This provides immunity to inhabitants of such areas from chest and respiratory diseases. The tree helps in stabilizing canal banks and preventing soil erosions
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Depending on the location of landfall, there can be numerous effects on the environment. In general, you can expect severe damage to trees and plants which will affect wildlife habitat for some time. Plant life is easily defoliated and trees uprooted during high wind/rain events.\n\nAnother possible impact could be pollution to the surface and groundwater. Storm surge and heavy rains can easily cause water treatment plants to overflow and contaminate fresh water sources. Near by agricultural lands could also cause water contamination if the become flooded. Pollution would impact fish and other animals that depend on the fresh water supply.\n\nCoastal areas, including coral reefs and sand quality, are usually devastated by hurricanes too. Damage to corals can cause an imbalance to coastal ocean aquatic life.\n\nThere are many affects of hurricanes on the environment and people, but above just describes a few. Doing a key word search for "coastal hurricane impacts" or "hurricane impact on ecosystem" might give you more information
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To keep the human population alive and going
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environmentalist, conservationalist, and ecologist would all study wetlands.
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Chesapeake Bay-nutrient pollution:\nLike other aquatic animals in Chesapeake Bay, blue crabs are vulnerable to summer's low oxygen conditions. ...nutrient pollution from farms, sewage treatment plants, homes and the exhaust from cars fuels algal blooms that remove oxygen from the water. When they are trapped in crab pots,  crabs often die from low oxygen levels. Also, pollution has reduced seagrass, which is crab habitat.\nhttp://www.chesapeakebay.net/info/blue_crab.cfm\nww.nationalgeographic.com/xpeditions/ lessons/14/g68/chesapeakescienceteacher68.pdf\n\nOil spill: non-point oil pollution can get into coastal waters and kill crabs.\nhttp://www.oceanservice.noaa.gov/education/kits/pollution/media/supp_pol012b.html\n\nFiddler crabs in marshes: \nHeavy metals such as mercury, copper, and zinc are toxic to fiddler-crabs. So are pesticides.\nhttp://www.amnh.org/nationalcenter/youngnaturalistawards/2000/gaurav.html
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most plants that require fertile soil and alot of water live in a delta. human like to live in delta because they can grow good crops. so other animals that feeds on the crops like the grasshoppers live on the delta. There is really no fish that live in a delta because it is where a river meets the ocean and neither salt water nor fresh water fish want to leave their habitat and go to the other side. (just think about the beach, you dont see any fish)
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Take your pick:\n\nbirds leave viable seeds in their droppings\nseeds drift in wind\nseeds catch on fur / clothing, and drop off, later\nseeds are found to be useful to humans, and we spread them\nwater (eg coconuts float, landing on distant shores, and sprouting)\n\nI am sure there are other ways...
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There is no corolation with oceans having high and low tides and blood pressure.  Moving water, however, does create negative ions which have been proven to make people feel better.  May be a distant thought behind that.\n\nSome people call the rise and fall of blood bressure "tides."  This may be where you have heard of a relation.
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Why not have enough for both? Why not make both? Instead of using money on stupid sh*t (you can think of a lot of things are money is going to waste on), we can make more swamps to control floodings, and it will also help out our eco system.
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It provides a cover for the animals and nutrients that reside there, so that in hot, dry weather, or rainy storms there is covering to keep things from seeping out.\nIt also provides a habitat for many creatures.
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The Mississippi River drains most of the North American continent and carries a huge sediment load of clay, silt, sand, and even gravel sized clasts all the way to its mouth. As the river opens into the ocean at the delta the velocity of the water slows and the ability of the river to carry sediments decreases, creating a huge sediment buildup at the mouth of the river. Other processes near the mouth of the river that gradually build the delta and coastal wetlands are from periodic flooding of the river. When the river flows over its banks during flood it carries these sediments out onto the flood plain where they settle out of the water. This process has been going on for millions of years and has built much of the coastal area of Louisiana, just as other rivers along the Gulf Coast have built the Texas shoreline and progressively moved it forward into the Gulf. \n\nThe Mississippi has not always been contained by levee systems, and when allowed to flow naturally the mouth of the river has migrated back and forth across the Louisiana coastal plain. At present there is speculation that the river, if allowed, would begin flowing across the Achafalaya area rather than taking the path it now takes to the sea. \n\nYou might be interested to know that the sediment pile created by the Mississippi River is over 30,000 feet deep along the Louisiana coastline.
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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.