title: Biodiversity and importance of floating weeds of Dara Ismail, Khan District of KPK, Pakistan.
abstract: The present paper is based on the results of taxonomic research work conducted in Dera Ismail Khan District of KPK, Pakistan, during 2005 - 2007. The area was extensively surveyed in order to collect floating aquatic weeds. From the study area 11 floating aquatic weed species belonging to 9 genera and 9 families were collected and identified in the light of available literature. These plants include Bryophytes: 1 species, Ricciocarpus natans (L.) Corda; Pteridophytes: 2 species, Azolla pinnata R.Br. and Marselia quadrifolia L., and Spermatophytes: 8 species, Lemna aequinoctialis Welw., L. gibba L., Marselia quadrifoliata L. Nelumbo nucifera Gaerth., Nymphoides cristata (Roxb.) O. Ketze. Nymphoides indica (L.) Kuntze:, Pistia stratiotes L. Potamogeton nodosus Poiret and Spirodela polyrrhiza (L.) Schleid. Floating weeds on one hand cause serious problems and on the other hand they are used for various purposes. Data inventory consists of botanical name, family, major group, habit and habitat, flowering period, availability, distribution in D.I.Khan, Pakistan and world, beneficial and harmful effects. Key to the floating aquatic species of the area was developed for easy and correct identification and differentiation.
authors: University of Wensam College, Gomal University Dera Ismail Khan KPK, Pakistan. skhan.marwat@gmail.com
authors: Sarfaraz Khan
authors: SK
authors: Marwat
authors: Mir Ajab
authors: MA
authors: Khan
authors: Fazal-ur-Rehman
authors: Mushtaq
authors: M
authors: Ahmad
authors: Muhammad
authors: M
authors: Zafar
mesh_terms: D059001:Aquatic Organisms / Q000145:classification*; D044822:Biodiversity; D006801:Humans; D010154:Pakistan; D057685:Plant Weeds / Q000145:classification*; D014873:Water Pollutants / Q000032:analysis / Q000633:toxicity
chemical_list: D014873:Water Pollutants