Species decline refers to the reduction in the population size or the number of individuals of a particular species. This phenomenon can occur due to various factors, including habitat loss, climate change, pollution, and overexploitation. When species decline, it can disrupt ecosystems and lead to a loss of biodiversity, which is essential for maintaining ecological balance. Conservation efforts are crucial to address species decline. These efforts may include protecting habitats, implementing sustainable practices, and creating laws to prevent overfishing or poaching. Organizations like the International Union for Conservation of Nature (IUCN) work to assess the status of species and promote strategies to help them recover and thrive.