Flora and vegetation study on Hairy Beggarticks (Bidens pilosa L.) plant in Egypt
Israa M. IsmaelDena M. Baraka, Ahmad A. khalaf Allah, Reham M. Mohammad
Bidens pilosa L. is an (Asteraceae) plant that originated from South America and can be found in almost all countries from tropical and subtropical regions. There are 231 sampled stands that used in this research to study the surrounded habitats of B. pilosa (floristic analysis, habitat characterization and vegetation analysis). In floristic analysis there are 113 species associated with Bidens pilosa L. which studied with their families, life forms, duration, nation distribution and floristic categories are presented in. Also it deals with environmental services and economic goods of B.pilosa and the species that associated with it. It was found that Poaceae (Gramineae) had the highest number of associated species with B. pilosa (25 species), also Therophytes were the dominant life form and an annual were the dominant duration (habitat). The environmental services segetals had the highest number of associated species (39 species representing 34.5% of the total species). The economic goods medicine had the highest number of associated species (68 species = 60.2% of the total recorded species). A total of 113 species were recorded in the 231 sampled stands representing 12 different habitats in the study area were studied in habitat characterization. In addition, the number of species in each habitat and the number of habitats which a species found in it. It was found that the Canals and ditches habitat had the highest number of species (80 species representing 70.8% of the total recorded species). The application of TWINSPAN on the cover estimates of 113 associated species recorded in the 231 sampled stands of Bidens pilosa, lead to the recognition of 13 vegetation groups. These groups showed a reasonable segregation along the habitats DECORANA. The vegetation groups are named according to first and second dominant species associated with B. pilosa. The presence of B. pilosa 100% in all vegetation groups, while cover varied from one group to another.