Ocean Tides

The land between low and high tide lines is known as the intertidal zone or littoral zone. This area is alternately covered and uncovered by the ocean's tides, creating a unique and constantly changing environment for marine life.

The red tide can occur in any month of the year. It is not yet clear what triggers the event.

The ocean is filled with unsolved mysteries and has continued to stump scientists with new discoveries everyday. One of the most puzzling issues is the phenomenon known as Red Tide. With records dating back to the mid 1800s, Red Tide has continued to frustrate researchers with the cause of this unusual event (About Red Tide 2005). Although Red Tide has occurred all over the world: Maine, Norway, Africa, Japan and even Oregon, I will be mainly concentrating on the Florida region in order to learn more about this catastrophic act of nature (Hunting Dangerous Algae 2002). First I will discuss some background information on Red Tide and give a brief description on how they can occur and which species are responsible for this disturbing phenomenon. Next I will concentrate on how Red Tide affects not only marine life, but our lives as well. With the wealth of information published about Red Tide, I will only be able to brush upon key aspects of it. With further research and education, someday we may be able to prevent some of the devastation caused by the Red Tide.

Red Tide is caused by a rapid population growth of microscopic plankton. These microscopic plankton release toxins that have severe affects on marine life and humans (Red Tide 2001). The toxins are Environmental chemicals' that can interfere with metabolism, nerve conduction, and the central nervous system (From Monsoons to Microbes 1999). The blooms mainly take place in coastal, warm waters.

Factors that promote red tide occurrences are

1. Warm temperatures

2. High nutrient content

3. Low salinity

4. Calm seas and

5. Rain followed by sunny weather.

As the plankton multiply and grow, they cause a discoloration in the water near the shoreline (Red Tide 2001). Often it turns a reddish-brown color, hence the name red tide. There have been occurrences where the water has turned a yellow, brown, or even a purple shade (Fish and Wildlife Research Institute 2005)

Scientist has summarized the development of Red Tide into four stages. The first stage is where the plankton is introduced into the area. Next is the growth stage where the population begins to multiply rapidly over a few weeks time span. As they reach the peak of growth they enter into stage three, maintenance. Here is where the bloom can either continue to live offshore or can be moved inshore by tides or strong winds. If the bloom moves closer to shore, nutrients are in greater abundance, which can cause the bloom to grow even larger. Finally, the bloom will eventually dissipate, ending the cycle (Red Tide 2001).

Red Tide occurs most often in the Florida region, particularly on the gulf side. Although there are thousands of microscopic species of plankton, one in particular resides only in Florida. The Karenia brevis is a dinoflagellate that was first identified in 1947 (Red Tide 2001). The Karenia brevis has caused most of the red tide occurrences within Florida's gulf waters. The organism is extremely fragile and can break easily when going through rough waves along beaches. They can be broken apart from the tides allowing the toxins to be released into the water (Literature review of Florida red tide 2003).

One of the newest developments in Florida's Red Tide research has been the connection between red tide and the dust storms from Africa. Scientists believe that the dust clouds that travel from the Saharan desert could be triggering these algae blooms. The iron is deposited into the water and then is used by the bacteria called Trichodesmium to fixate nitrogen. Since there is an abundance of nitrogen in the ocean, the water is more susceptible to creating toxic blooms (Dust from Africa 2005).

Organisms involved in Red Tide are not always harmful to the marine life, but unfortunately there is a great number that are. These harmful algal blooms (HABs) have caused death among fish, birds, manatees, and several other vertebrate species. Eating the toxic plankton, eating other organisms already infected with the toxins, or simply by exposure through the water can contaminate organisms (Effects of Florida Red Tide 2005). The toxins do not affect filter-feeding shellfish even though the toxins are concentrated in their organs. Other fish, however, are not so lucky and end up being victims to the powerful red tide (Literature review of Florida red tide 2003).

The death rate of fish during Red Tides has reached extreme numbers. Estimates are that over 100 tons of fish can be killed during a Red Tide in a single day (Literature review of Florida Red tide 2003).

Once the fish is infected, they begin to twist and swim in a corkscrew fashion. They begin to defecate and regurgitate as well as experience convulsions. Their body slowly begins to paralyze and prior to death they begin to experience respiratory failure. This process unfortunately can take from a couple of days to a full week before the organism eventually dies (Effects of Florida Red Tide 2005).

Manatee and dolphin mortality numbers are on the rise due to red tide toxins. In 1996 150 manatees along the Florida region were reported dead over a two-year period from a red tide occurrence (Hunting Dangerous Algae from Space 2002). This single red tide wiped out 10% of the Florida manatee population as well as 162 dolphins within Mexico's waters (START 2004). Along the shoreline of Siesta Key and Lido beaches, there have been at least 44 manatees that have died from coming into contact with red tide (Red Tide Toxins Hit Florida Beachgoers 2005). Although these numbers seem extreme it is the reality of Red Tide. In June 1987 to May 1988 one of the largest dolphin kills was reported along the Atlantic coastline. 740 bottlenose dolphins died from red tide during this period (Effects of Florida Red Tide 2005).

Red Tide has affected humans as well. The impact is both medical and economical. The diagnosis of Red Tides physical affects has been narrowed down into five different types of poisoning. 1. Amnesic Shellfish Poisoning (ASP). Symptoms are vomiting, headache, diarrhea, memory loss, seizure, or even coma. You can get this type of poisoning from eating a contaminated clam or mussel 2. Ciguatera Fish Poisoning (CFP). Symptoms for CFP are skin irritation, temperature reversal, hallucinations, and muscular and joint pain. 3. Diarrheic Shellfish Poisoning (DSP). Symptoms are chills, vomiting, nausea, and diarrhea. Scallops, mussels and short-necked clams cause DSP. 4. Neurotoxin Shellfish Poisoning (NSP). Symptoms for NSP are tingling of limbs, muscle aches, and dizziness. Clams, scallops, mussels, and oysters are all associated with NSP. 5. Paralytic Shellfish Poisoning (PSP). Symptoms are rash, fever, numbness of mouth, drowsiness, and vomiting (Shellfish Poisoning 2005). The earliest record of PSP was in the year of 1793 when a man died and four others were left ill (Saving the Oceans 1992)

From 1978 to 1987, half of the reported seafood poisonings were the result of Red Tide toxins (From Monsoons to Microbes 1999). Becoming contaminated with these toxins can be deadly unless you take necessary precautions. To treat most of the cases, you should go to your local hospital to get your stomach pumped or induce vomiting in order to get the toxins out of your system. If you cannot get to a hospital your best choice is to call the poison control center for further instructions. Eating contaminated shellfish tastes no different than if they were not contaminated. The only way to avoid a Red Tide poison is to be aware and cautious of when and where you eat shellfish (Red Tide 2001).

The economy has also been left to survive the blows of red tide. The West Florida shelf is a hot spot for fishing, aquaculture and tourism, all of which can be drastically affected by a surprise visit from a red tide. (Dust from Africa Leads to Large Toxic Algae Blooms 2005).

Tourism is one of Florida's most profitable businesses. Families don't want to attend a beach where they will suffer an irritating cough and itchy eyes. Restaurants suffer from the lack of tourism and locals refusing to eat out in order to avoid eating something that could be contaminated (Businesses pursue Red Tide solution 2004). Oyster harvesting is another huge business in Florida that is getting hit by HABs lately. On numerous occasions, Florida has had to shut down the oyster industry in Apalachicola Bay because of the threat of red tide contamination (Red tide threatens oyster harvest 2003).

Red Tide has created a large impact on our oceans and our lives. It's increasingly affecting our marine life and our own health and economic prosperity. Programs have been established to try and reduce the harmful effects of the Red Tide and keep people educated about this phenomenon. The next step in coming closer to solving the mystery is more research. Whatever is causing red tide, and the answer behind stopping it is out there. We just have to keep diving deeper for the truth.

there are 732 tides a year! That is about right. But, it depends if it is diurnal, twice a day so 365 x 2 = 730, minus 2 in leap years, 728. if tide is semi-diurnal, then there are 4 tides a day 1,460, and it can be mixed with 3 tides a day.

The sun and moon's gravitational pull on Earth's oceans causes tides. The moon's gravitational pull is stronger due to its proximity, creating two high tides and two low tides each day as the Earth rotates. The sun's gravitational pull also affects tides, with spring tides occurring when the sun, moon, and Earth align, creating higher high tides and lower low tides.

Prawns typically live in the intertidal zone, which is the area between the high and low tide marks. They are often found in sandy or muddy substrates where they can burrow and hide during low tide and forage for food during high tide.

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The highest high tides, known as spring tides, occur when the sun, moon, and Earth are aligned, causing gravitational forces to combine. The lowest low tides, known as neap tides, occur when the sun and moon are at right angles to each other, leading to gravitational forces partially cancelling each other out.

Neap tides in January 1989 would have occurred around the time of the third quarter moon, when the gravitational pull of the sun and moon partially cancel each other out. Neap tides are characterized by minimal tidal range and occur roughly every two weeks.

The rough idling, high and low idle, and stalling issues with your 1996 Mazda 626 LX could be caused by several factors such as a dirty or faulty idle air control valve, a vacuum leak, a malfunctioning throttle position sensor, or a clogged fuel filter. It is recommended to have a professional mechanic diagnose the problem to properly identify and address the issue.

High tides typically occur when the gravitational pull of the moon and the sun align, creating increased water levels along coastlines. This alignment happens twice a day and is influenced by various factors such as the Earth's rotation and topography of the coastline.

On Earth, ocean tides are caused by the moon. This is because the moon is pulling on the surface of the Earth and the water in the ocean which is closer to the moon is pulled upward. This upward surge causes high tide while on the opposite side of the Earth (where the moon is furthest from the water) there is a low tide.

High tides occur when the gravitational pull of the moon and sun cause ocean waters to bulge, creating a higher water level. Low tides happen when the gravitational forces are not directly aligned, resulting in a lower water level. The Earth's rotation also influences the timing and frequency of tides.

No, the tides do not occur simultaneously in Dover and Calais. The timing of high and low tides can vary depending on geographic location and other factors such as local currents and weather conditions.

The highest tides in the United States can be found in Anchorage, Alaska. The tides in Anchorage can vary by as much as 40 feet between high and low tide due to its location and unique geography.

The moon needs to be in line with the sun, creating a syzygy, for a spring tide to occur. A syzygy happens during a full moon and new moon when the gravitational forces of the sun and moon combine to produce higher high tides and lower low tides.

The next Proxigean Spring Tide is expected to occur on November 4, 2021. This event happens when the moon is closest to the Earth during its full or new moon phases, resulting in higher-than-usual tides.

During neap tides, the moon is positioned at a 90-degree angle relative to the sun, with the Earth in between. This alignment results in the gravitational forces of the sun and moon partially canceling each other out, leading to lower tidal ranges compared to during spring tides.

During high tide, hermit crabs typically retreat into their shells and seek shelter to avoid being washed away by the incoming water. They may remain hidden in burrows, under rocks, or in crevices until the tide recedes and it is safer for them to move around again.

You can typically catch more fish during high tide, as the rising water levels bring more food and nutrients closer to shore, attracting fish to feed. Conversely, during low tide, fish tend to move to deeper waters or sheltered areas, making it more challenging to catch them.

No, spring tides do not only occur in spring. Spring tides happen twice a month, around the new moon and full moon, when the sun, moon, and Earth are aligned. This alignment causes the gravitational pull of the sun and moon to reinforce each other, creating higher than normal tides.

The "spring" in "Spring Tide" is not related to the "spring" season of new growth.

As you may know, the gravities of the Sun and the Moon cause two high and two low tides every day as the Earth turns.

When the Sun and Moon are working together, at Full Moon and New Moon, the high tides are especially high and the low tides especially low. These are the Spring Tides, because the water "springs up" to its highest mark. When the pull of Sun and Moon are ar right angles (First and Last Quarter Moons), the variation in the tides is suppressed -- not-so-high highs and not-so-low lows. These are called "Neap" Tides, but I can't tell you how they got the word, "neap."

There are two Spring Tides every month, or more correctly, every lunation.

Florida typically experiences two high tides and two low tides each day, occurring approximately every 6 hours and 12.5 minutes. The exact timing of high and low tides can vary depending on the specific location along the coast of Florida. It is essential to consult local tide charts to determine the exact timing of tides for a particular area in Florida.

No, the intertidal zone is not in the bathyal zone. The intertidal zone is the area between high and low tides on the coast, while the bathyal zone is a deep-sea zone beginning at about 200 meters below the surface of the ocean.