What are invasive species?

They can be animals, plants or other organisms that were initially transported by human action to locations outside their natural range and are able to survive, reproduce and spread causing negative impacts on the ecology of the new location, as well as on society and the economy. The spread of invasive alien species (IAS) is considered one of the main threats to the preservation of biodiversity and ecosystem services.


What characterises an invasive species?

The great diversity of invasive species implies that their characteristics are diverse. However, there are some characteristics that are more frequent and common to all organisms:

  • Rapid growth and/or great capacity for dispersal;
  • They compete more efficiently for available resources than native species;
  • In their place of origin they have a wide distribution, being adapted to diverse conditions;
  • Absence of predators and competitors where they are introduced. In the place where they are invasive, they have no natural enemies since they are displaced from their place of origin;
  • Production of a large number of seeds and/or new embryos (in the case of animal species), viable for long periods.
  • In the case of plants, they can reproduce vegetatively without the need to produce seeds for dispersal.

Main objectives:

The SEM Invasoras project, approved by the Environmental Fund of the Ministry of Environment and Climate Action, led by Guimarães City Council in partnership with the Laboratório da Paisagem, includes research, education and communication components
Education and awareness-raising on the ecological, social and economic impacts of IAS on ecosystems and how to prevent their spread.
Dissemination, communication on the relevance of transmitting knowledge about EEI.
Município de Guimarães
Laboratório da Paisagem
Fundo Ambiental
Ministério do Ambiente e da Ação Climática