Authors: Sillero, Neftalí; Arenas-Castro, Salvador;

COVID19 lock-downs had a strong effect on the environment and biodiversity. The most visual effect was the occurrence of wildlife in the middle of urban settlements. However, the true effects on species is not well known. Our questions are: Were lock-downs long enough to increase habitat suitability? Which is the temporal lag for detecting significant habitat suitability improvements? Here, we applied a recent developed framework to analyse trends on species' habitat suitability over time by modelling the species distributions with temporal series of environmental variables obtained from satellite remote sensing. We analysed the trends on habitat suitability for several species of vascular plants, amphibians, reptiles, birds, and mammals, before, during, and after the first lock-down in Portugal and Spain, from 01/12/2019 a 31/08/2020. We modelled the species distribution with Maxent presence-background algorithm. We obtained five environmental variables (Albedo, Evapotranspiration, LST, NDVI, and Surface reflectance) from MODIS with periodicity of 8 days. We analysed the habitat suitability trends with the Mann-Kendall test. Preliminary results show an increment on habitat suitability around March of 2020, approximately at the middle of the lock-down, with a subsequence decrease, for most of the species.