The issue of what exactly defines a vacant niche and whether they exist in ecosystems is controversial. The subject is intimately tied into a much broader debate on whether ecosystems can reach equilibrium, where they could theoretically become maximally saturated with species. Given that saturation is a measure of the number of species per resource axis per ecosystem, the question becomes: is it useful to define unused resource clusters as niche 'vacancies'?
Read more about Vacant Niche: History of The Concept, Definitions, Potential Causes of Vacant Niches, Demonstration of Vacant Niches, Consequences of The Nonsaturation of Niche Space, Relative Frequency of Vacant Niches in Various Groups of Animals and Plants, Criticisms of The Concept
Famous quotes containing the words vacant and/or niche:
“Your honesty is not to be based either on religion or policy. Both your religion and policy must be based on it. Your honesty must be based, as the sun is, in vacant heaven; poised, as the lights in the firmament, which have rule over the day and over the night.”
—John Ruskin (1819–1900)
“Fact is Our Lord knew all about the power of money: He gave capitalism a tiny niche in His scheme of things, He gave it a chance, He even provided a first instalment of funds. Can you beat that? It’s so magnificent. God despises nothing. After all, if the deal had come off, Judas would probably have endowed sanatoriums, hospitals, public libraries or laboratories.”
—Georges Bernanos (1888–1948)