Invasive Species Invasive, alien species, those which colonise, expand and out compete native species (Smith & Smith, 2009), are a major threat to our habitats, terrestrial and aquatic species, and biodiversity. Agricultural and leisure industries are affected as well as conservation welfare and the continued wellbeing of man, flora and fauna. Whole ecosystems can be distorted and the economic cost of awareness, prevention and eradication systems is substantial. Most invasive species have been introduced by mandeliberately or otherwise. As an island, Ireland has been subjected to less invasive species than larger nearby land masses e.g.
In Florida, it was first recorded in 1765; its introduction is linked to early shipping commerce between Florida and South America. Today, water-lettuce is commonly found in the central and southern portions of the state, but new infestations of water-lettuce have been found in North Florida's spring-fed rivers and lakes. What environmental issues is the water lettuce causing? Pistia stratiotes mats clog waterways, making boating, fishing and almost all other water activities, impossible. It also degrades water quality by blocking the air-water interface and greatly reducing oxygen levels in the water, eliminating underwater animals such as
A species is considered to be an exotic species once it has been brought into an area that it was not established in previously by humans, either by accident or intentionally (Richardson et al. 2000, and Alston and Richardson 2006). Once a species has been brought into a new area, it is only if that species can create a large number of offspring that can survive far away from the parents whether humans try to interfere or not can it be considered to be an alien invasive species (Richardson et al. 2000). Contributing factors for seed dispersal Invasive plants that can use birds as their main form of dispersal are the species that can quickly become problematic (Gosper et al.
They pull down trees and break up thorny bushes, which help to create grasslands for other animals to survive. During the dry seasons, elephants use their tusks to dig for water. This not only allows elephants to survive in dry environments, it also provides water for other animals that share harsh habitats. They create trails that act as fire breakers and water run offs. Other animals, including humans, depend on the openings elephants create in the forest and brush and in the waterholes they dig.
The African Elephant makes far more abiotic differences in their environment by creating things like lakes while the Tiger Shark has mainly biotic factors and many of there changes in the ecosystem are a result of them eating fish and turtles and less about them shaping the land. The Elephants and the Alex Hajdukiewicz Keystone Species
Nutrient pollution coming from agricultural runoff and other fertilizers allows for the growth of species that upset the balance of the ecosystem such as Cattail, harmful algae bloom, and duckweed. The sulfur in the agricultural fertilizers leads to accumulation of toxic mercury in fish, birds, and mammals. Also, exotic animals or invasive species displaced native and threatens to disrupt the ecosystem balance. The purpose of this experiment is to determine how the water quality affects the Everglades ecosystem and how water pollution impacts different species. Urbanization is a big threat that contributes to poor water quality in water pollution.
Many Americans believe that elephant poaching is decreasing each year, however, the population statistics continue to worsen. In Using Poaching Levels and Elephant Distribution to Assess the Conservation Efficacy of Private, Communal and Government Land in Northern Kenya, researchers write, “Over-hunting of wild animals is a primary driver of species decline.” (Festus W. Ihwagi et al.) While humans can be a positive influence by depleting certain animals where overpopulation is a concern, they also contribute a lot of harm. According to Early Age Reproduction in Female Savanna Elephants (Loxodonta Africana) After Severe Poaching, Owens, M. J. and D. Owens write that in 1970, Africa had an estimated 1.3 million elephants on the savannah. By
There is a lot of phosphorus in runoff during rain from farmlands and caused huge invasion by cattails. Phosphorus was in a concentration of 500 ppb. The dense cattails make birds and alligators unable to nest. Some invasive plants outcompete native plants. Other invasive plants are Melaleuca, Old World climbing fern, Australian Pine, Brazilian Pepper, and Seaside Mahoe.
Trees at the perennial river site were in general more healthy had larger diameters, and more individuals of mistletoe. This trend suggests that Big Leaf Mistletoe has a reliance on water to grow access to grow. Furthermore we found that different species of trees were effected significantly different by the mistletoe, as some species tended to have more infection such as the sycamore and others had none such as the juniper. These results help define a niche for these tree feeding parasites. This is important as many different species of Mistletoe interact with environments differently, some acting as keystone species helping the environment thrive with diversity; and some are detrimental killing the trees and ecosystems.
In areas where it has become established, invasive species have been shown to rapidly displace indigenous species through competitive omission, to the extent that some populations have become locally extinct. Few studies have assessed the potential of invasive species to transmit diseases into novel aquatic
We will describe here some pests in Southwest Florida that are quite deadly and should always be avoided. Cockroaches We start with the most common pests that are perhaps present in all parts of the worlds. Cockroaches are the most common pests near beaches and
To counter this, scientists are breeding Florida Panthers with Texas Cougars to create more diversity to create healthy systems. -”Panther Helpful Websites” by SES Community Capra explains that diversity must be used to create a more resilient community. For example a “community lacking diversity, such as monocropping agriculture devoted to a single species of corn or wheat, a pest to which that species is vulnerable can threaten the entire ecosystem” (25). If agriculturists would grow many different types of crops making the network more complex, there will be less of a chance of the entire harvest being
The Nutria is a large rodent and its native habitat is South America. They are predominantly found in rivers, marshes that are fresh, several types of wetlands, and on some occasion’s swamps. Nutrias were imported to the United States because of their fur. They were eventually released into the environment and are reported to have spread to many parts of Maryland (Kendrot). These animals are detrimental to the marshes in Maryland, and need to be prevented from spreading more before the damage done becomes irreversible.
It originated from Africa and was first presented to Florida as being a pet. These snails have more than 500 host plants, and if they became native to Florida it would potentially devastate Florida’s agriculture. To remove the snail yo have to search around houses and plants and hand remove them from the environment.They are found around houses because