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What (who) is vacant hours - definition
Vacant niches; Vacant ecological niche
![[[Introduced species]], such as the [[common brushtail possum]], are often free of many of their normal parasites.](https://commons.wikimedia.org/wiki/Special:FilePath/Brushtail possum.jpg?width=200 "[[Introduced species]], such as the [[common brushtail possum]], are often free of many of their normal parasites.")
Great Hours
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![Theophany of the Lord]].](https://commons.wikimedia.org/wiki/Special:FilePath/Kreshenie.jpg?width=200 "Theophany of the Lord]].")
RELIGIOUS CELEBRATION
Great Hours
The Great Hours, also called the Royal Hours, are a particularly solemn celebration of the Little Hours in the Eastern Orthodox and Eastern Catholic Churches. The Royal Hours is celebrated only three times a year: on the Eve of the Nativity, the Eve of Theophany,If the Eve of Nativity or Theophany falls on Saturday or Sunday, the Royal Hours are chanted on the preceding Friday, and on that Friday it is not permitted to celebrate the Divine Liturgy.
Royal Hours
RELIGIOUS CELEBRATION
Great Hours
The Royal Hours, also called the Great Hours or the Imperial Hours, are a particularly solemn celebration of the Little Hours in the Eastern Orthodox and Eastern Catholic Churches. The Royal Hours are celebrated only three times a year: on the Eve of the Nativity, the Eve of Theophany,If the Eve of Nativity or Theophany falls on Saturday or Sunday, the Royal Hours are chanted on the preceding Friday, and on that Friday it is not permitted to celebrate the Divine Liturgy.
Turin–Milan Hours
![Baptism of Christ]]'' below, by "Hand G", Turin](https://commons.wikimedia.org/wiki/Special:FilePath/14th-century painters - Les Très Belles Heures de Notre Dame de Jean de Berry - WGA16014.jpg?width=200 "Baptism of Christ]]'' below, by \"Hand G\", Turin")
![The ''Finding of the [[True Cross]]'' probably by Hand G, Turin](https://commons.wikimedia.org/wiki/Special:FilePath/Jan van Eyck 094.jpg?width=200 "The ''Finding of the [[True Cross]]'' probably by Hand G, Turin")
![crucifixion]] by Hand H, Turin](https://commons.wikimedia.org/wiki/Special:FilePath/Meister 'H' des Turin-Mailänder Gebetbuches 001.jpg?width=200 "crucifixion]] by Hand H, Turin")
![Page from the French phase of work in the Paris ''Très Belles Heures'' by the [[Master of the Parement]] or his workshop. The borders have had small images added by the miniaturist](https://commons.wikimedia.org/wiki/Special:FilePath/Meister des Paraments von Narbonne (Umkreis) 001.jpg?width=200 "Page from the French phase of work in the Paris ''Très Belles Heures'' by the [[Master of the Parement]] or his workshop. The borders have had small images added by the miniaturist")
ILLUMINATED MANUSCRIPT
Turin Hours; Hours of Turin; Très Belles Heures de Notre-Dame; Milan-Turin Hours; Milan hours; Turin-Milan Hours
The Turin–Milan Hours (or Milan–Turin hours, Turin Hours etc.) is a partially destroyed illuminated manuscript, which despite its name is not strictly a book of hours.
Wikipedia
Vacant niche
The issue of what exactly defines a vacant niche, also known as empty 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'?
