باریک برگ‌های بیگانه ایران و وضعیت تهاجمی آنها

Invasive alien plants can have a detrimental impact on the biodiversity and economic aspects of the new region. Knowing the characteristics of these plants is important for making decisions and applying a successful management strategy. The latest surveys introduced 311 species as alien plants in Iran, and in this list, plants from the poaceae family had the highest portion. Many studies showed that alien grasses have a high risk of invasion in both agricultural and natural ecosystems. In this survey, the number of alien grasses, their invasive status and some other characteristics were investigated. The results showed that out of 34 alien grasses investigated, 22 are naturalized, 11 are casual and 1 is invasive. The photosynthetic pathway of most of them (27 species) was C4, while the proportion of annual and perennial species was equal with annuals. 23 species of alien grasses in Iran are known as weeds in agricultural production areas, and in addition to reducing agricultural production, due to human intervention, they have a high potential for emergence and invasive in natural areas. Itchgrass (Rottboellia cochinchinensis) has been identified in the margins of sugar cane fields in Khuzestan for more than a decade and has been proposed as an invasive weed. Considering the high potential of these plants to become invasive and their competitive ability, especially with global warming, it can be predicted that we will face a high proportion of these kinds of plants in the future. Applying management plans and removing primary infestation and continuous monitoring will be sustainable management options for these species.