Vernal pools are seasonal wetlands that fill with water during the wet season and dry up during the dry season. These pools are typically found in regions with mediterranean climates, such as California, where there is a distinct wet and dry season. Vernal pools are important habitats for a variety of plant and animal species, many of which are specialized to survive in the unique conditions of these pools. Research in this area often focuses on the ecology and conservation of vernal pools, including the species that rely on them, the factors that influence their biodiversity, and the threats they face from human activities such as development and agriculture. Additionally, researchers may study the hydrology of vernal pools, the characteristics that make them unique habitats, and strategies for their conservation and restoration.