Akwai dazuzzuka da yawa a duniya, inda babban nau'in shuke-shuke bishiyoyi ne. Dogaro da yanayi da yanayin yanayi, gandun daji iri daban-daban ne. Idan bishiyoyin coniferous suka mamaye shi, dajin coniferous ne. Irin wannan yanayin yanayin halittar an fi samunta ne a cikin taiga ta arewacin duniya, kuma a wasu lokutan ana samun ta a wasu lokutan a yankin na wurare masu zafi. Ana kuma kiran gandun daji Taiga boreal. Suna cikin Arewacin Amurka da Eurasia. Bishiyoyi suna girma anan cikin yanayin sanyi mai sanyi akan ƙasa podzolic.
Daga cikin yankuna masu haɗuwa, yakamata a rarrabe Meshchera Lowland, a kan yankin da Babban tan Ruwa na Dazukan Coniferous yake. Tana cikin Rasha - a cikin yankunan Ryazan, Moscow da Vladimir. Tun da farko, dazuzzuka dazuzzuka sun kewaye wani yanki mai girma daga Polesie zuwa Urals, amma a yau ƙaramin yanki ne kawai na wannan yankin ya tsira. Pines da Turai spruces girma a nan.
Asalin gandun dazuzzuka
Daji irin wannan ya samo asali ne daga zamanin Cenozoic a tsaunukan Asiya. Sun kuma rufe kananan yankuna na Siberia. A cikin Late Pliocene, saurin sanyi ya ba da gudummawa ga raguwar yanayin zafi, kuma conifers sun fara girma a filaye a cikin yanayin yankin, suna faɗaɗa wani muhimmin ɓangare na kewayon su. Dazuzzuka sun bazu a lokacin da ake samun rikice-rikice. A lokacin Holocene, iyakar dajin coniferous ya zurfafa zuwa arewacin Eurasia.
Flora na coniferous bel
Tsarin halittar daji na belin coniferous kamar haka:
- itacen pine;
- larch;
- fir;
- ci;
- itacen al'ul.
Akwai nau'ikan haɗuwa da bishiyoyi a cikin dazuzzuka. A Kanada da Amurka, zaku iya samun spruce fir da balsamic, Sitka da spruce na Amurka, Pine mai ruwan hoda. Junipers, hemlock, cypress, redwood da thuja suna girma anan.
A cikin dazuzzuka na Turai, zaku iya samun farin fir, Turawan Turai, itaciya da yew, itacen da ake da shi da baƙar fata. A wasu wurare akwai haɗuwa da manyan bishiyoyi. A cikin gandun daji na Siberian coniferous, akwai nau'o'in larch da spruce, fir da itacen al'ul, har ma da juniper. A cikin gabas mai nisa, Sayan spruce da larch, bishiyoyin kuril Kuril suna girma. Duk gandun dazuzzuka masu gishiri suna da bishiyoyi daban-daban. A wasu wurare, ciyawar dawa, euonymus da raspberries suna girma tsakanin conifers. Akwai lichens, mosses, tsire-tsire masu tsire-tsire a nan.
A sakamakon haka, Babban Belt na Coniferous Forests yanki ne na musamman wanda aka kirkira shi a lokacin pre-glacial kuma aka faɗaɗa shi a cikin lokuta masu zuwa. Canje-canjen yanayi sun shafi yankin rabar conifers da kebantattun gandun daji na duniya.
