CINETIQUE SPONTANEOUS PLANT AFTER THE  ABANDONMENTOF ACEREAL CHAMP,THE CASE OF THE REGION OUARGLA

Hafida TRABELSI; Ahmed CHAABENA; Aicha TOUATI

Hafida TRABELSI Laboratoire de Bioressources sahariennes, Préservation et valorisation. Université Kasdi Merbah-Ouargla (Algérie) 2. Département des sciences de la nature et de la vie, Université Kasdi Merbah-Ouargla (Algérie).
Ahmed CHAABENA Laboratoire de Bioressources sahariennes, Préservation et valorisation. Université Kasdi Merbah-Ouargla (Algérie) 2. Département des sciences de la nature et de la vie, Université Kasdi Merbah-Ouargla (Algérie).
Aicha TOUATI Département des sciences de la nature et de la vie, Université Kasdi Merbah-Ouargla (Algérie).

Keywords: Actionanthropic, Agroecosystem, Flora, Ouargla, Pivotabandoned

Abstract

Changing thefloristiccomponentisparticularlyinterestingin theagroecosystem.Inarid areas,the introductionofcropsunder pivot,inducedfloristic diversityissignificant.Ourwork liesintheimpactof introductionsof plant specieson the floristiccompositionof biodiversityafterthe establishmentof a cropunder pivotfollowed by a stop.For this,we usedthree pivotsat different agesof abandonment:01year,02years and3 yearsat theregion of HassiBen Abdallah inOuargla. Surveys conductedduringthe sampling period, fromthe month ofFebruary(2005)until March(2005),ledto inventory 22species distributedin 10botanical families.The analysis of resultshighlightedthe predominanceof the speciesBromus rubensinthreestudy sites,withavery highdegree of presence.In addition, stations1 and2 show alowfloristic diversitycompared tostation 3, whichreflectsa wide variation inthefloristiccomponent,it is probably relatedtothe ageof abandonmentandhuman actions.