Extreme Environmental Events as Ecological Reset Mechanisms in Animal Populations Under Drought, Fire, and Heatwave Disturbances

Abstract

Climate change is driving extreme events, such as droughts, wildfires, and heatwaves, that affect ecosystems and animal populations. This paper explores how these disturbances are components of the ecological reset, shaping animal behavior, population dynamics, and community structure. The information was gathered through long-term field observations, satellite imagery, and ecological modeling to understand how these events affected different animal species in both temperate and tropical ecosystems. These findings indicate that droughts and heatwaves decrease the availability of food and water. Still, the regeneration of habitats and species-richness through wildfires follows, due to the elimination of invasive vegetation and the formation of new niches. Statistical tests showed that rapid rebounds in a species after a disturbance are caused by decreased competition, whereas habitat loss leads to long-term declines in other species. As an illustration, the population of small mammals rose by 30 % in places that had just been cleared by fire in overgrown vegetation (F = 3.91, p < 0.05). The results are important in that bring out the duality of extreme events as destructive and regenerative. The research summarizes that although extreme environmental events are harmful in the short run, serve as agents of ecological reset, allowing the establishment of new species assemblages and the reestablishment of ecological stability. Research in the future should be aimed at knowing the long-term ecological impacts of these events, especially on species adaptation, genetic diversity, and ecosystem services. Also, resilience to such disturbances should be included in conservation and habitat management strategies to ensure that future climate extremes do not affect the ecosystems.