Natural environmental disasters can shape the genetic make-up of not only humans but all animals. One disaster can change an entire population’s structure, allele frequencies, and outlook. Hurricanes are a type of natural disaster that can demonstrate two specific examples of genetics which are population bottlenecks and genetic drifts. A specific example of how bottleneck effects and genetic drift can occur in areas where hurricanes are prevalent in is Hurricane Katrina. When looking at Hurricane Katrina, the population bottleneck effect and genetic drift played important aspects in the state of Louisiana’s population, but more specifically in the city of New Orleans. A population bottleneck occurs when the parent population is reduced …show more content…
Hurricane Katrina caused allele frequencies in New Orleans and the state of Louisiana to change which can cause the new population to be genetically different than the pre-Katrina population. There was a 75% out-migration of people in the “toe” of Louisiana once Hurricane Katrina hit, but there was an influx of in-migration to the in-land counties of Louisiana. The areas in the “toe” were hit the hardest by Hurricane Katrina due to the large amount of flooding from the levee failure causing a larger volume of people to out-migrate. The people that out-migrated caused their allele frequencies to be a lot lower than before because they won’t be present in that population anymore. The areas that had a large influx of people were inland from the areas hit the worse. This would cause the genetic variation to increase in the inland areas which can result in new mutations. In terms of specific racial groups more than 175,000 African Americans left New Orleans after the storm and 75,000 never returned. The allele frequencies present in the African American communities will be completely different due to the 75,000 people not returning which would cause a reduction of the population size. The reduced population size will have some effect on the allele frequencies. Some alleles may no longer be present in the population if they were present in specific African Americans that are not a part of the New Orleans’s community anymore. Figure 2 demonstrates the New Orleans population by race and ethnicity before and after Katrina. The African American population was the majority racial group and even though a lot of people from that group left the effect is not as large. On the other hand, the Caucasian and Hispanic population grew after Katrina hit and these areas would see a larger change due to the population size being small. A change that could
New Orleans, Louisiana lies at the second lowest elevation among major cities in the United States. It is a city surrounded by water, making it almost like an island. To counter this dangerous combination of the low elevation along with the lakes, rivers and swamps surrounding it, the Army Corps of Engineers built a series of levees around the city to foster its protection. It is these very same levees however that might doom the city should a Category 3 hurricane ever hit. Our statistical analyses examined the current belief that there is a 39% probability that New Orleans will be hit by a major hurricane and based on the resulting Z-score, rejected that belief. We did find however that the probability, while not 39%, was still in the 30th percentile range, which should still be a major cause for concern among the leaders and residences of the city of New Orleans.
Rather than working with nature through multi-tiered flood control with spillways and reservoirs, levees disallowed the river to naturally flood, deteriorated the natural ecosystem, and ultimately weakened the city’s defenses against the hurricane (Kelman). Culture and society further interacted, as beliefs in man’s power over nature and racial discrimination promoted levee expansion and racial segregation, creating a city of racially differentiated risk (Spreyer 4). As a result, inundation mostly impacted the lower land neighborhoods that housed poor people of color. Society and nature interfaced in the application of levees that contained nature’s forces. Ultimately, nature won out: the hurricane overpowered the levees and breached the Industrial Canal, disproportionally flooding the mostly black, low-elevation neighborhoods of New Orleans (Campanella
On Friday evening, September 7, 1900, many of the 37,000 residents of Galveston, Texas, were settling down to dinner, few if any of them concerned about the steady 15 mph northerly wind rattling their windows. Within 48 hours, at least 8,000 of the townspeople would be dead, victims of the single worst natural disaster in U.S. history. Relatively few people are aware that the deadliest natural disaster in the United States was the hurricane that struck Galveston Island on September 8, 1900. One of the best resources that can be found to help fully understand the significance of this storm is Isaac's Storm: A Man, a Time, and the Deadliest Hurricane in History by Erik Larson.
In the late summer of 2005, a terrible tragedy occurred that changed the lives of many in the south-east region of the United States. A Category 3, named storm, named Hurricane Katrina, hit the Gulf Coast on the 29th of August and led to the death of 1,836 and millions of dollars’ worth of damage (Waple 2005). The majority of the damage occurred in New Orleans, Louisiana. Waple writes in her article that winds “gusted over 100 mph in New Orleans, just west of the eye” (Waple 2005). Not only was the majority of the damage due to the direct catastrophes of the storm but also city’s levees could no longer hold thus breaking and releasing great masses of water. Approximately, 80% of the city was submerged at sea level. Despite the vast amount of damage and danger all throughout the city, officials claimed that there was work being done to restore the city of New Orleans as a whole but many parts, and even the people, of the city were overlooked while areas of the city with higher economic value, and more tourist traffic, were prioritized along with those individuals.
On August 29th, 2005, Hurricane Katrina, the most expensive hurricane in American history, made landfall in Louisiana with winds of one hundred and twenty-seven miles per hour (“Hurricane Katrina Statistics Fast Facts”). The sheer magnitude of the amount of lives and property lost was enormous, and it was triggered simply by warm ocean waters near the Bahamas ("How Hurricane Katrina Formed"). Nature was indifferent to whether the raging winds and rain would die off in the ocean or wipe out cities; it only follows the rules of physics. A multitude of American authors has attempted to give accounts and interpretations of their encounters with the disinterested machine that is nature. Two authors, Stephen Crane and Henry David Thoreau, had rather contrasting and conflicting interpretations of their own interactions with nature.
Most of the destructions from the events of August 29th 2005, when Katrina Hit the City Of New Orleans, were not only caused by the storm itself; but also, by failure of the engineering of the levee system protecting the entire infrastructure of the city. The years of poor decision making and avoidance of the levee system led to one of the most catastrophic events in the history of the United States. Throughout our research, we have identified three key players in charge of the levee system design, construction and maintenance. These three organizations are the Unites States Corps of Engineers, the New Orleans Levee District and the Louisiana Department of Transportation. The consequences of the hurricane showed the organizations negligence in the design, construction and maintenance of the protective walls. Later independent sresearch showed that more than 50 levees and food walls failed during the passage of the hurricane. This failure caused the flooding of most of New Orleans and all of ST. Bernard Parish. The Unites States Corps of Engineers had been in charge of the of the levee system and flood walls construction since the 1936 flood act. According to the law, the Louisiana Department of Transportation is in charge to inspect the overall design and engineering practices implemented in the construction of the system. Once the levee systems were finished, they were handed over to the New Orleans Levee District for regular maintenance and periodically inspections. The uncoordinated actions of these three agencies resulted in the complete failure of a system that was supposed to protect the people of New Orleans. The evidence is clear that this catastrophic event did not happened by chance. The uncoordinated response of these...
Hurricane Katrina was the most expensive hurricane that hit the United States ever. The hurricane was the third strongest of the season, behind both Hurricane Wilma and Rita. The hurricane was the third strongest of the season, behind both Hurricane Wilma and Rita.
According to Hurricane Katrina At Issue Disasters, economic damages from Hurricane Katrina have been estimated at more than $200 billion… More than a million people were displaced by the storm… An estimated 120,000 homes were abandoned and will probably be destroyed in Louisiana alone (At * Issue). For this perspective, “Hurricane Katrina change the Gulf Coast landscape and face of its culture when it hit in 2005” (Rushton). A disaster like Katrina is something the victims are always going to remember, for the ones the lost everything including their love ones. Katrina became a nightmare for all the people that were surround in the contaminated waters in the city of New Orleans. People were waiting to be rescue for days,
Hurricane Katrina was one of the most devastating natural disasters to happen in the United States. The storm resulted in more then US$100 billion in damage when the cities flood protection broke and 80% of the city was flooded (1). The protection failure was not the only cause for the massive flooding, the hurricanes clockwise rotation pulled water from north of New Orleans into the city. 330,000 homes were destroyed and 400,000 people from New Orleans were displaced, along with 13,00 killed (1). Although the population quickly recovered, the rate of recovery slowed down as the years went on leading us to believe not everyone
New Orleans by far felt the biggest effect of Hurricane Katrina. Many people were rescued but had nowhere to go and the government was not prepared for the disaster. There was no plan for recovery. Communication failures were one of the major problems which included power failures and broken telephone lines. Homes were destroyed and many were left stuck on the roof of their broken homes. Most of the city’s major roads and buildings suffered extensive damage. Countless people were left unemployed and homeless. Above all, the worst effect caused by Hurricane Katrina was the final death toll of 1,836 people with 705 still reported
There comes a time in the world where the outcome of certain events can cause a huge social change, one of those events is Hurricane Katrina. The events that took place prior to, during and after Katrina although impact only a few places physically it was left in the minds of everyone in the world. There were many actions that could have taken place to prevent the damage of such a catastrophic event, however nothing was done. Hurricane Katrina, a category 3 hurricane struck Louisiana and parts of the Mississippi. New Orleans in particular, due to various reasons received the most damage. Katrina first started off as a small hurricane formed in the Bahamas as it moved towards Louisiana and Mississippi it became a category 5, which is the strongest it can become, then decreased to category 3 once it finally struck. The storm caused an incredible amount of damage that Hurricane Katrina was noted as the most destructive and costly natural disaster in US history. The death toll was 1,836 people with 200 bodies left unclaimed as well as over 700 people unaccounted for. Hurricane Katrina was a source of social change as people have learned from the impact it had on the mind and body of the citizens of New Orleans, the mismanagement and lack of leadership the government showed, and the substantial immediate and long term economic damage it caused the country.
On August 29, 2005, the third strongest and biggest hurricane ever recorded in American history hit the Gulf Coast at eight o’clock a.m. The interaction between a tropical depression and a tropical wave created a tropical storm later referred to as Hurricane Katrina (FAQS, 2013). Forming over the Bahamas, Hurricane Katrina gradually strengthened as it moved closer and closer to the Gulf of Mexico. Recorded on August 28th, 2005, Katrina jumped from a category three storm to a category five storm with maximum sustained winds up to 160 miles per hour. Although other hurricanes, such as Hurricane Rita and Hurricane Wilma, exceeded Katrina, this dominant storm was classified as the fourth most intense hurricane based its pressure capacity. Once Hurricane Katrina hit land, it was pronounced as a category four storm moving slowly. While people thought that the slow speed of this storm prevented trauma, records show that Katrina did more damage than any fast-moving storm could have ever achieved (Solanki, 2013). Katrina produced abundant debris. The debris was in such large quantity that if it was stacked together on a football field, the rubble would reach the elevation of ten and a half miles. The size of Katrina also caused 90,000 square miles to be affected. Once proclaimed a category three storm, Hurricane Katrina slowed to the speed of 155 miles per hour. At this point in time, Katrina proved to be the sixth most prevailing hurricane traced in history. (Solanki, 2013). Several different aspects of life were impacted by Hurricane Katrina such as availability of gasoline, economic issues, and the ability to have an adequate supply of drinking water (Solanki, 2013). Hurricane Katrina was a large storm ...
The book, Hurricane Katrina, states that Katrina was, “the most destructive natural disaster to ever hit the United States”(Rodger 4). Hurricane Katrina began as a tropical depression in the southeastern Bahamas on the twenty-third of August. The next day, Katrina strengthened into a Tropical Storm. As it moved through the Bahamas, the storm strengthened, and when it hit Florida on the 25th of August, the Tropical Storm had become a category 1 hurricane. The storm weakened as it went through Florida, but regained its strength when it went through the Gulf of Mexico. Hurricane Katrina became a category three storm on the 27th of August, and on the 28th it had strengthened to a category five with windspeeds over 170 mph. The storm landed in Plaquemines Parish, La. as a category 4 hurricane. As the storm moved northeast, New Orleans officials thought that they were in the clear. Little did they know, the levees holding both Lake Pontchartrain and Lake Borgne were not strong enough to withstand the amount of water and storm surge from Hurricane Katrina. These levees broke and nearly 20 p...
Hurricanes are powerful and destructive storms that involve great rain and wind. The United States of America has dealt with many hurricanes that have cost a great amount of damage. However, there is one hurricane that happened in 2005 that stands out among the others, Hurricane Katrina. Hurricane Katrina was one of the worst hurricanes to hit the United States, a category 5 on the Saffir/Simpson Hurricane Scale. An estimated 1836 people died because of the hurricane and the floodings that happened after (Zimmermann 1). Katrina initially beg...
Hurricanes occur all over the world, at different times, but commonly through June first and late November. However in late August 2005 a catastrophic hurricane struck. This was Hurricane Katrina. With winds traveling over one hundred miles per hour making it a category five on the Saffir- Simpson Hurricane Scale it was said to have cause billions of dollars’ worth of damage. Hurricane Katrina flooded nearly forty thousand homes, and killed at least two thousand people (“Hurricane”). An average category five hurricane has enough energy to power street lamps for more than twenty seven thousand hours (Williams 58). Knowing about Hurricane Katrina, and the devastation of the city in New Orleans would be beneficial. Also, general information on hurricanes can help civilians and people of higher authority better understand and prepare for damage that could once hit their town and community. Because experts know the general information on these storms they can help explain to the public why and how Hurricane Katrina and other hurricanes occur. Hopefully, in the future civilians will know and use this information to their advantage against hurricanes.