October 2015, № 10 (185)

Pikalova E.V. BIOLOGY AND DISTRIBUTION OF THE MAIN HOTBEDS OF AMBROSIA TRIFIDA L. IN THE ORENBURG REGIONIn article results of researches of invasive species Ambrosia trifida L. are given. The features of the biology and distribution of ambrosia are shown. The study of biological features of Ambrosia trifida L. plays an important role in the understanding of its invasive success in the new habitats.The morphometric parameters plants of ambrosia are characterized by high values of coefficient of variation, but in comparison with neighboring regions the level of variability of morphometric parameters is relatively low. The lowest values of most morphometric parameters marked in cenopopulation Krasnoyarka. Accordingly, the lowest values of coefficient of variation in the populations, located along the roads, and highest — in the populations, occupying the floodplain habitats, ravines, croplands. Among the indicators of morphometrics greatest variation have plant height, sheet width, length of the root, number of lateral branching, and among generative organs — the length of the inflorescence. Also it is established, this spesies on the territory of the Orenburg region is anthropotolerant, populating various synanthropic habitats, moreover, the seizure of new territories is proceeding successfully. There is an active introduction of spesies in natural communities or disturbed community with displacement of indigenous species, that brings to so-called to "floristic pollution of the territory". Lists new centers of localization on the territory of the Orenburg region and compiled a list of hotbeds, need control. A total of reliably detected ninety one of cenopopulation. The reason for such wide distribution of A. trifida can serve as a violation of the processes of self-regulation of ecosystems under the influence of anthropogenic impact. A map of the distribution of species is made. Further extention of Ambrosia trifida secondary areal in the region is predicted.Key words: invasive species, cenopopulation, Ambrosia trifida L., coefficient of variation, morphometric parameters.

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About this article

Author: Pikalova E.V.

Year: 2015

Editor-in-chief

Sergey Aleksandrovich
MIROSHNIKOV

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