The word "niches" is correct and usable in written English.
You can use it to refer to an area of focus, specialization, or interest of a particular person or group. For example, "The school had a wide range of niches in which students could pursue their interests."
She compared their evolutionary radiations – or how species adapt to and fill ecological niches – to famous examples like Darwin's finches in the Galapagos or the cichlids of East Africa's lakes.
The boys were captivated by the medieval world around us, the priests with their ornate gold crosses, the tunnels linking the churches, and the macabre sight of human bones sticking out of coffins and carved niches in the rock face.
"Strategically, AudioBoo will get big by creating lots of niches, like news, radio and music," said Rock. "We'll never be entirely a music app, but if you think about the social audio around music, like rehearsals or backstage, that's an interesting business model".
There are a couple of empty niches in the entrance, where others are filled with decorative mosaic; is now the time to fill them in?
The ecosystem there is full of fascinating niches, and you can tailor your experience to your interests: I regularly talk to feminist bloggers, video game journalists, political reporters and comedy writers.
Winter literature has its own niches and sub-genres – children's books, festive chick-lit, Carol Ann Duffy's individually published poems.
"There are a lot of niches in the market," Tóth-Batizán added.
And, as Oz Shy, an Israeli academic and author of a new book on network economics points out, both niches are appropriate markets to be occupied by only a single company.
The industry is carved into niches, making it hard for integrated service providers to emerge.
Every year sees more new model niches created as manufacturers reach out with focused products, targeting a plethora of sub-markets.
The response of the volume car makers is to tailor cars for niches.
