Halitta da yankunan Arewacin Amirka: siffofi da bayani dalla-dalla

Halitta da yankunan Arewacin Amirka a cire tare da meridians, saboda a kowane yanki na nahiyar na da damar da za su samar da wasu masana'antu. A zurfi da na halitta yanki ne, da more shi yana a miƙe tare da Meridian. Gaskiyar cewa topography gubar zuwa canje-canje a cikin rabo na zafin rana da kuma danshi ba kawai daga arewa zuwa kudu, amma kuma daga yamma zuwa gabas.

Halitta da yankunan Arewacin Amirka, dake a yankin na Greenland da Canada tarin tsiburai, kira Arctic Hamada. Tun da yanayin damina ne sosai matsananci, wannan gudummawar da wani sosai matalauta misali na Flora da fauna. A yankunan da ba su shagaltar da kankara, shi za a iya gani kawai mosses da lichens. Kusan dukan dabba duniya na zaune a cikin teku.

A yanzu arewa na nahiyar ne tundra zone. Tun da akwai ko da yaushe zafi, da ƙasa suka Scotland. Kusan daukacin yankin da aka rufe da mosses da lichens. Amma ga bishiyoyi, da Dwarf Birch kuma alder ba ya isa wani tsawo na fiye da 5 cm.

The m zuwa kudu, da na halitta yankunan Arewacin Amirka dubi ƙara tundra. An dauke da wani tsaka-lokaci da kuma halin da alternating gandun daji da kuma tundra yankunan. an kuma halin da wurin alder da Willow thickets. Kawai a cikin yankin na gudãna fara bayyana spruce kuma larch.

Halitta yanki na coniferous gandun daji da aka located kara kudu. Ga za ka iya duba da matsananci da dogon hunturu da kuma bazara - a takaice da kuma dumi. Game da ƙasa danshi da iska, tun da wuri ne halin da low matakan da danshin da kuma zafi a nan fiye da kima.

Materials, North American zone halin tsaka-bulan. Saboda haka, tsakanin coniferous da deciduous gandun daji shi ne yankin na gauraye gandun daji.

Kuma riga a cikin ƙasa na Appalachian yanki wakilta broadleaf gandun daji, wanda aka halin da dama nau'in bishiyoyi. Amma ga dabbobi, akwai mutane da yawa barewa, porcupines, Bears baribalu da possums, wanda su ne kawai wakilan da marsupials a dukan nahiyar.

Amma ga lebur yankunan nahiyar, akwai gandun daji-steppe zone. Gabashin ake kira daji, saboda shi yana da mafi girma mataki na danshi. Yau, da wannan yankin da aka cikakken hatsi saboda shi ne halin da daidaici da ƙasa, m yanayin damina da kuma kyau baki gona.

North America, inda halitta yankunan da ake located da kyau a kan yankin iko, shi ne halin da gaban da steppe zone a cikin tsakiyar ɓangare na nahiyar. A nan, da babban adadin zafi ne kawota, amma wannan ba wani isasshen adadin danshi ne sakamakon.

Amma ga gabashin ɓangare na subtropical zone, akwai girma gauraye gandun daji, wakilta yawa jinsunan conifers, Dwarf dabĩno da shrub jinsunan Evergreen itacen oak.

Idan muka magana game da Pacific Coast, aka mamaye gandun daji da kuma katako sarƙaƙƙiya. A kasa ne ruwan kasa, da kuma suka yi girma mai yawa rare jinsunan Evergreen itacen oak, wanda aka riga aka sani kafin Ice Age.

Halitta yankunan of America, mamaya da sashin Florida da kuma California ake kira subtropical da kuma wurare masu zafi. A zones ake alternated juna Meridian. A ciki part aka cikakken shagaltar yankunan Savannah da Woodland. Game da Atlantic bakin teku a fili, shi ne yalwa moistened cinikin iskõki, domin shi ne ainihin babban yawan wurare masu zafi da gandun daji.

A Cordillera mafi fili wakilta high-tsawo zone.