The term for an ecosystem characterized by low rainfall is a desert. Deserts are defined by their arid conditions, which typically receive less than 250 mm (10 inches) of precipitation per year. This limited water availability shapes the fauna and flora in such ecosystems, resulting in specialized adaptations among plants and animals for survival under extreme conditions. For example, many desert plants, like cacti, have developed water conservation strategies, while animals may be nocturnal or burrowing to escape heat during the day. Deserts are diverse and can be found across continents, including the Sahara and the Mojave.