Ukuze kunqunywe inani le- izinhlobo de izihlahla ezikhona emhlabeni, kulula ukubheka uhlu lwamahlathi. Ngokusho kwedatha yakamuva, kunenqwaba yedazini izinkulungwane zezihlahla ezikhula emhlabeni wonke. Okuthile okungaphezu kwe- 60.000 amakilasi Yezihlahla zikhona emahlathini, emapaki nakwezinye izindawo lapho kungatshalwa khona izihlahla.
Iningi lalezi izinhlobo Zitholakala eSouth America. Izihlahla zingahlukaniswa ngezigaba ezimbili, lezo eziseqenjini le- ukuzivocavoca nalabo abavela angiosperms. AmaConifers afaka ukuhlukaniswa kokuqala. Lezi izihlahla ezihlala ziluhlaza ezihlala ziluhlaza unyaka wonke. Eqoqweni lesibili kukhona ezinye izinhlobo.
I-Los izihlahla kuqinisekisa imisebenzi eminingi ku-ecosystem. Ziwumthombo womoya-mpilo. Amanye asetshenziselwa amalungiselelo okwelapha kanti amanye asetshenziselwa ukondla y ukwakhiwa. Ngokuya ngohlobo lwazo, ziziphatha ngokuhlukile. Ezinye zikhula endaweni enelanga, ezinye zikhetha inhlabathi eyomile, ezinye zifuna indawo sombra.
Izihlahla zine- impilo ende inelukuluku impela, ngoba abanye baya emashumini ambalwa eminyaka kanti abanye bafinyelela emakhulwini eminyaka yokuphila.