Research regarding the alien plant species in the Satu Mare County

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Article Title:	Research regarding the alien plant species in the Satu Mare County
Authors:	Monica Marian, Camelia Varga, Leonard Mihaly Cozmuta, Lucia Mihalescu, Oana Rosca, Anca Mihaly Cozmuta
Affiliation:	Universitatea de Nord Baia Mare
Abstract:	Alien (non-native) species biological invasions are widely recognized as a serious threat to environments and economies throughout the world. Alien invasive plants are becoming recognized by some authorities as another component of global environmental change. The decrease in biological diversity is a concern among many ecologists, and invasive plants are seen as a threat to ecosystem health. In studying invasion ecology, an introduced species should be treated as an alien to the natural ecosystem because it would not be there without human intervention. Alien invasive plants have become firmly naturalized in most habitats of Europe and Romania. Often, the spread of alien species also poses an increasing risk to human health and socio-economic values. In this paper, a list of alien plant species recorded from Satu Mare county in the last years is presented. These species are discussed regarding their impact to the ecosystems, immigration modes, invasive status, geographical origins, dispersal mechanism, their distribution, main infestation sites etc. The most dangerous alien species for semi-natural and natural habitats in the investigated territory are identified.
Keywords:	alien species, invasive species, non-native, environmental change, ruderal communities, xenophytes, hemerophytes
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*Correspondence:	Lect. Dr. Monica Marian, Universitatea de Nord Baia Mare, Facultatea de Stiinte, Catedra de Chimie-Biologie, Strada Victoriei nr. 76, Baia Mare. Tel 0722 192059. e-mail: moni_marian@hotmail.com