How many species are there on Earth? Progress and problems
John J. Wiens
Abstract
How many species exist on Earth? Projections range from millions to trillions. A 2011 paper in PLOS Biology provided a comprehensive estimate of 9 million.
Topics & Concepts
BiologyEvolutionary biologyEarth (classical element)AstrobiologyComputational biologyAstronomyPhysicsSpecies Distribution and Climate ChangeMicrobial Community Ecology and PhysiologyIsotope Analysis in Ecology