Introduction
Alien and invasive plants (AIPs), classified as biological invaders, negatively affect water sources as (Ghahramanzadeh, 2013). The NEMBA Alien and Invasive Species Regulations (Notice number 864 of 29 July 2016 in Government Gazette 40166) aim to: Prevent the unauthorised introduction and spread of alien and invasive species to ecosystems and habitats where they do not naturally occur, Manage and control alien and invasive species, to prevent or minimise harm to the environment and biodiversity; and Eradicate alien and invasive species from ecosystems and habitats where they may harm such ecosystems or habitats.
The NEMBA Alien and Invasive Species Regulations further categorise the various invasive species, as listed in the National List of Invasive Species, as falling within Category 1a, 1b, 2 and 3.
AIPs in South Africa cover a vast area of the land surface and is continuing to spread at a rapid pace (Blanchard & Blignaut, 2011). Woody AIPs negatively and certain areas detrimentally affect biodiversity especially faunal and floral Species of Conservational Concern (SCC), water sources, land use and productivity (Mugido et al., 2014). Some of the woody species include but not limit to Acacia mearnsii (Black Wattle), Acacia saligna, Eucalyptus sp. These species have a total evaporation (TE) of 895 mm in the Western Cape. The native and indigenous vegetation, in contrast, have an TE of 520 mm (fynbos) and TE of 575 mm (thickets), this indicates that AIPs use more water than native vegetation to the area does (Meijninger & Jarmain, 2014). Van Wilgen, Cowling and Burgers (1996) estimated a 30% loss of water supply to the City of Cape because of the increased AIPs proliferation and the increase usage of water by these AIPs. Controlling of AIPs within the catchment area of the water supply could have lessened the water shortage that the City of Cape Town is experiencing currently. The invasion of AIPs is a severe threat to the sustainability of agricultural activities, which are water intensive. This is not limited to the agricultural sector, but also includes other industries using water as one of their key inputs. AIPs proliferation has both economic and environmental implications (Lenda,
An invasive species is a species that comes out of its natural environment, and enters another. These animals are usually very bad for the ecosystem and may cause an unbalance. These animals usually come in with many competitive advantages and can easily dominate any competition. This will give them the ability to eat as much as they would like without being threatened in any way. This could possibly diminish many populations and end an entire ecosystem.
Invasive species are very common all over the world. Invasive species are an organism that lives in an ecosystem in which they don’t belong. Invasive species are not only dangerous to people, but also the ecosystem and must be removed.
One environmental issue that the great lakes watershed has been exposed to is invasive species. An invasive species is any organism that is foreign to an ecosystem and causes harm (United States Environmental Protection Agency, 2016). In ordered to be classified as foreign they do not have to be from a different country but they just must be a non-native to an established ecosystem. Some of the species travel at their own will but they primarily spread through human activities unintentionally. As we import and export goods, or travel, some uninvited species may ride along and travel to new places. Organisms can be stowed away in ships or products like wood. Some ornamental plants may
Issue: The environmental issue that I have chosen is the impact that invasive species have on the environment. The impact that invasive species have on the environment is vast, yet little is done about it. This issue is extremely important and will impact the world for generations to come. In this paper, I hope to learn about the effect they have on environment and what we can do about it.
Biodiversity boots ecosystem productivity where every little species plays an important role in maintaining a healthy community. Maintaining a viable habitat requires lots of efforts, determination and frequency. Invasive plants are a major threat to our natural environment. These invasions change the natural diversity and balance of ecological communities. They threaten the survival of many plants and animals. They are excellent at surviving and reproducing which out-compete the native plants. Understanding these huge consequences let us understand why volunteer activities like this are so helpful and needed. They play a huge part in contributing to our environment in many positive ways. Removing these invasive plants are helping a lot in restoring the habitat and giving native plants greater chance for survival. As time went by, these efforts will slowly help cleaning our atmosphere, providing our environment with fresh air and improve health effects in human (Sagoff,
Invasive species are organisms that harm a new environment that they are not native to. Many invasive species like Eurasian milfoil are easily able to reproduce and can do so fast. Due to this, the limited space in a body of water or area of land is quickly taken over by the invasive species so other native plants face the risk of death or even extinction. Overall, these invasive species can do great harm to an ecosystem or an economy, causing problems that are destructive to numerous organisms.
Invasive species have been brought into the United States, some on purpose to help fill a needed use and then latter getting out of control and creating a mess of what they have done to waterways,
The book entitled, “Ecology of Weeds and Invasive Plants”, opens with a quote from Dr. A. S. Crafts saying, “in the beginning there were no weeds.”. This quote causes one to stop and think about it. What Dr. Crafts meant by this quote was that even though plants have existed for many years, weeds did not exist before humans began to travel about. With all the traveling that humans do the problem of invasive plants has grown tremendously (Radosevich, 1). The impact that invasive species have on the environment is often overlooked or thought of as unimportant. The issue is vast, yet little is done about it. The problem with invasive species is extremely important and will impact the world for generations to come. This paper will explain what invasive species are, show the negative impacts invasive species have on the environment, and what we can do about this issue.
Park Protection: This aims to protect water streams and protection of human life and adjacent land from fire. Control of introduced plants and animals.
An invasive species is an organism that is alien to an ecosystem. An invasive species also thrives and is able to reproduce in the new environment. The organism can range from a pathogen to an animal both of which can cause ecological or human harm
Influence on ecosystems range from human causes like the bulldozing of a forest to natural causes like a fire or a flood. In recent times, the introduction and spread of invasive species has transformed native communities rapidly and, in some cases, created irreversible damages. In the Earth’s history, changes have often occurred in the ecosystems. For example, glaciers and the retreat of glaciers cause wide-spread changes. However, although change is a constant in ecosystems, animals and habitats often cannot adapt to the rapid alterations of non-natural stresses. Harm to the environment from the introduction of invasive species occurs through changes in the habitat and declines in the native species. Invasive species
• invasion of non-native species (which are often introduced inadvertently via shipping or intentionally via illegal trade in exotic species);
The biodiversity effects of non-native invasive species have been described as “immense, insidious and usually irreversible” (Veitch and Clout, 2002). There is significant evidence proving that invasive species can cause severe economic, environmental and ecological damage (Mack et al., 2000). A lot of time and research has been devoted to dividing the world into regions with distinctive habitats and species. Numerous pathways, mostly anthropogenic, are breaking down these realms and facilitating the ecological and biological invasion of non-native species.
Furthermore, the restriction can also impact the entire habitat and the organisms in the habitat. For instance, if we were to restrict the introduction of species we wouldn’t have to fix the damages that were left from agriculture, forestry, and other human enterprises. For example, in Asia there was a chestnut blight fungus tree that was introduced in America which left a disaster for many animals, such as ten species of moths that lived on the chestnut tree’s had became extinct. If we were to restrict the introduction of species the ten moths didn’t wouldn’t be extinct in this case. The cost of fixing these environments are approximately cost $137 billion a per year
Invasive species are organisms that are not native to an ecosystem and cause harm to it. These organisms are capable of bringing about a great deal of damage to the ecosystems they are foreign to. This can range from disrupting the growth of the environment it has taken over to completely decimating other species. The introduction of invasive species to new environments often involves humans. The way that invasive species are introduced to a new environment varies greatly. Invasive species may be introduced by something as simple as humans accidentally tracking species into a new environment from the bottom of their shoes, or something bigger like destroying an ecosystem to clear the land, forcing the species that lived there to flee to a new ecosystem that can be disrupted by the presence of a new species.