engleski

Invasive plants - what should we need to know about them?

Invasive species have imposed enormous economic and ecological costs upon ecosystems and the services they provide to humans. During the beginning of invasion precess they often consist of a small number of colonists, such that the cost of exluding colonists is trivial compared to dealing with the problem after populations become established and spread. Management of nonindigenous, invasive plant species is among the most challenging undertakings of natural resource managers. Numerous methods to document the spatial distribution of invasive plants are available to land managers. Successful management of invasive species often requires an integrative approach, which combines monitoring, research, control tools, preventive regulations and interagency coordination. Information on the distribution and abundance of nonnative plant species is particularry important for large conservation lands where new introduction or expansions of existing weed populations may be difficult to detect in a timelly and cost- effective manner. In order to prevent new introductions and the secondary spread of existing nonnative species to new ecosystems we requires predictive tools that can be used to help guide resource allocation and prioritize management activities. Early detection and rapid response strategies are difficult to implement, specially on shallow lake areas that contain complex networks of lakes and rivers with diverse uses and limited management resources.

invasive species ; spread ; management options

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