Predicting effects of climate change on the distribution of nectar and pollen plants species Teucrium polium L. and Thymus kotschyanus Boiss. & Hohen.

Plants producing nectar and pollen, producing abundant nectar and pollen strengthen the pollinator population and increses biodiversity and honeybee products. Teucrium and Thymus kotschyanus are among the most important species to produce vegetable nectar in Iran. These plants play a major role in producing honey and pollen in rangelands. In the present study, the potential distribution for T. kotschyanus and T. polium was assessed by using the MaxEnt model.  Firstly, 19 bioclimatic variables were extracted from chelsa data collection for evaluating the current weather condition and was modeled by max software. According to the results, the organic carbon content in the soil profile (orc) is the most important variable affecting the distribution of both species. In. T. kotschyanus not only the soil organic carbon but also the amount of sunlight (solar), deriest month (BIO14) and aspect are the most influential variable. In addition to the amount of aspect, annual rainfall (Boio12) and the weight percentage of sand particle are also considered to be the most important environmental factors in the distribution of T. polium and Thymus kotschyanus species. The results of this study can provide valuable information to identify the priority of areas and possible future shelters for the protection of T. kotschyanus.  T. polium. Species.