This is the 18491st most frequent Russian word.
ямальская
"Yamalskaya" refers to something related to the Yamal region or Yamal Peninsula in Russia.
In this sentence, "ямальская" is used as an adjective describing 'природа' (nature), indicating that the nature being referred to is related to the Yamal region.
Ямальская природа славится своей суровой красотой.
Yamalian nature is famous for its harsh beauty.
Here, "ямальская" modifies 'традиция' (tradition), signifying that this tradition belongs to or originates from the Yamal area.
Это ямальская традиция, которой мы гордимся.
This is a Yamalian tradition that we are proud of.
In this use, "ямальская" describes 'кухня' (cuisine), specifying that the cuisine in question is from the Yamal region.