Effect of Climate Change on Distribution of an Endangered Medicinal Plant (Fritillaria Imperialis L.) in Central Zagros, Iran
Authors
Abstract
Climate change has a great impact on the species distribution range and many
endangered plant species. Fritillaria imperialis as a species that is native to Central
Zagros, Iran is a medicinal plant with great ecological and commercial profits. Its
population has decreased considerably and the species would be endangered in later
decades. Understanding the habitat needs of this species, evaluating habitat conditions, and
forecasting its potential habitat are important for protecting F. imperialis. The presence of
F. imperialis points recorded from our field surveys in Chaharmahal-va-Bakhtiari province
as a part of Central Zagros, Iran in spring 2017. In order to model its distribution based on
correlation analysis, two topographic variables and eight bioclimatic ones as the input of
Maximum Entropy model (MaxEnt) were used. The results showed that temperature
seasonality (55.1%) and precipitation of driest quarter (22.9%) were important factor
drivers of F. imperialis suitable habitat. The accuracy of the maximum entropy model in
predicting the distribution of the studied species was high (AUC=0.91) as 2.33% (37986
ha) in Chaharmahal-va-Bakhtiari Province for the F. imperialis, which has had suitability.
About 18% and 16.5% of F. imperialis habitats in the area may be lost due to climate
change by 2070 under two climate warming scenarios (RCP4.5 and RCP8.5, given by the
IPCC). As shown by the model, under the current climatic conditions, the suitable habitat
would be rendered to an unsuitable one in the future resulting in local extinction. The
results of this study can be used to identify sites with high extinction probability of F.
imperialis and protect susceptible habitats against the effects of climate change.
