Assessment of the key evolutionary traits that prevent extinctions in human-altered habitats using a spatially explicit individual-based model

Identifying key evolutionary strategies that support population persistence remains a challenging task for biodiversity conservation. Here we assess if animal adaptations to cope with low densities (i.e. that facilitate mate-findings or promote spatial aggregation of individuals) can allow species to persist in human-altered habitats. A spatially explicit and individual-based model was developed to assess if, and under what circumstances, such adaptations maintain population viability. The model was parameterised with data from the movement and demography of the spur-thighed tortoise (Testudo graeca) and simulated scenarios with differences in adult survivorships, initial population sizes and habitat alterations. Habitat alterations reduced population viability, and extinction rates were dependent on population characteristics and mate-finding distance. In contrast, philopatry around the birthplace did not prevent extinctions. Our results highlight the importance of considering specific spatial traits of species when assessing their vulnerability to human habitat alterations.Financial support was granted by the Spanish Ministry of Economy, Industry and Competitiveness, and by the European Regional Development Fund (ID: CGL2012-33536-MINECO/FEDER, UE, CGL2015-64144-MINECO/FEDER, UE). E.G. and R.C.R.C were supported by the Regional Valencian Government with a postdoctoral and predoctoral grant respectively (APOSTD/2015/048 and ACIF/2010/133). A.S.A. was supported by a Vicenç Mut contract co-funded by the Regional Government of the Balearic Islands and the European Social Fund (PD/003/2016). A.S.A and J.D.A were supported by a Ramón y Cajal contracts (RYC-2017- 22796 and RYC-2017-22783 respectively) co-funded by the Spanish Ministry of Science, Innovation and Universities, the State Research Agency and the European Social Fund