author(s)
Raheleh Mehrabi, Haji Gholi Kami, Gholamreza Bagheri, Kalpana Pai, Farhad Alipour

abstract
Point of this study is to explore impact of biological systems particularly sorts of host plant on life and number of butterflies in particular territories. Butterflies are a gathering of insects which, getting affected by immediate impacts of atmosphere progressions, encounter a risk from different components in the nature, since they are potential bioindicator and one of paramount components of all environments furthermore closely connected with plants. Plants as butterfly's host respond first to the atmosphere changings and afterward to phytophagous insects and adjust themselves corresponding to conditions. In this study, local butterflies and their host plants were inspected once a month in a boundless zone encased among Alborz Mountain Range and Dasht-e-Kavir Desert, North of Iran, in 150 days from May 2009- September 2009. In these areas 65 species of plants belonging to 22 families have been archived, which concurring our results, blooms of family Asteraceae were basically visited by butterflies up to 70 separate butterflies' species, which demonstrates its imperative part in nourishment and survival of visitors, because of overall appropriation in different climate and having a paramount nectar hotspot for grown-up butterflies. Likewise, Pieris rapae was most plentiful guest for host plant, i.e. 46 host plant species. Based on this study, we accept that expanding butterflies' number brings about developing different sorts of fauna that feed from this bug and thus leads, enhancing ecosystems and bringing numerous favorable circumstances for individuals which might make arrangements for developing attractive plants in the future.