Invasive species causes and effects

Authorities use the same methods to eradicate water lettuce as they do water hyacinths. While pine rocklands are maintained by fire, Burma reed can reach 12 feet 3.

Invasive species causes and effects

Increasingly, an additional and more severe threat has been affecting the forest sector worldwide - invasive species. Invasive species are any species that are non-native to a particular ecosystem and whose introduction and spread causes, or are likely to cause, socio-cultural, economic or environmental harm or harm to human health.

The increasing global movement of people and products is also facilitating the movement of alien species around the world. These species may be unintentionally introduced to new environments in shipments of food, household goods, wood and wood products, new and used tires, animal and plant products, containers, pallets, internal packaging materials and humans.

In the absence of their natural predators, competitors and pathogens, they can prosper in new environments and spread at the expense of native species, affecting entire ecosystems.

Not all invasive species have been inadvertently introduced, however.

Invasive species causes and effects

Particularly challenging to natural resource management are non-native species that have been intentionally introduced into an ecosystem to provide economic, environmental or social benefits.

Many species of plants, trees and animals have been introduced outside their native ranges as ornamentals for gardening or for the pet industry. These species have escaped to become serious problems in forests and other ecosystems.

This is a considerable concern in the forest sector since many of the tree species used for agroforestry, commercial forestry and desertification control are alien or non-native to the area. It is vital to ensure that such species serve the purposes for which they were introduced and do not escape to cause negative effects on native ecosystems.

While the definitions and impacts of invasive species on the forest sector are still debated and need reviewing in the context of forest management, a number of initiatives, programmes and activities have been initiated. There is an overall lack of information on invasive species and the forest sector at the global scale.

Information sharing is necessary in the planning and implementation of any strategy for the management of invasive alien species. The FAO Forestry Department is addressing the pressing global issue of invasive species in the following ways. A review of forest insect pests and diseases including invasive species in both naturally regenerating forests and planted forests was carried out in 25 countries representing Africa, Asia and the Pacific, Europe, Latin America and the Caribbean and the Near East.

Profiles on a number of important pest species impacting forests and the forest sector worldwide were prepared. A publication on global forest health, including insect pests, diseases and invasives species has been prepared: Global review of forest pests and diseases.

With the financial support of the FAO-Netherlands Partnership Programme, the FAO Forestry Department has carried out a number of fact-finding studies to assess the extent and intensity of invasiveness by forest trees.

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The data gathered in the global review of the status of invasiveness of forest tree species outside their native habitat is available in database format. FAO has documented the benefits and drawbacks of Prosopis spp.

FAO offers assistance to countries not only in response to pest outbreaks and emergencies but also in establishing long-term prevention and forest protection strategies. FAO serves as a neutral forumbringing countries together to discuss technical and policy issues related to invasive species and the forest sector.

FAO has also helped establish regional networks dedicated to the issue of invasive species and the forest sector.Invasive species cause harm to wildlife in many ways. When a new and aggressive species is introduced into an ecosystem, it may not have any natural predators or controls.

It can breed and spread quickly, taking over an area. Aquatic invasive species pose an ongoing threat to the environment, economy, recreation, and human health and safely.

Invasive species causes and effects

These species are a direct driver of biodiversity loss, yet also hinder economic development, serve as vectors of disease, decrease the aesthetic value of nature, and prevent recreational activities. The Invasive Species Specialist Group (ISSG) is a global network of scientific and policy experts on invasive species, organized under the auspices of the Species Survival Commission (SSC) of the International Union for Conservation of Nature (IUCN);the Invasive Species Specialist Group, ISSG aims to reduce threats to natural ecosystems and the native species they contain by increasing.

An integral part of sustainable forest management is measures to protect forests from natural threats such as fire, insects and diseases. Increasingly, an additional and more severe threat has been affecting the forest sector worldwide - invasive species.

Invasive species are any species that is not native to a specific ecosystem (7). The majority of people believe that invasive species are harmful; causing economic damage, disrupting ecological food webs, and out competing native species for food and land.

Compared to other threats to biodiversity, invasive introduced species rank second only to habitat destruction, such as forest clearing. Of all 1, imperiled species in the United States, 49% are endangered because of introduced species alone or because of their impact combined with other forces.

Introduced species - Wikipedia