North American jeji, ko Mene ne wani daji?

Prairie na Great filayen North America ne wani ɓangare na nahiyar, da su ci gaba da Turawa dauki game da 4 kilomita dubu tsawo da kuma 800 kilomita fadi. Hinterland wuri da kuma kariya daga yamma da Rocky Mountains sa hazo yanayin siffofin da iyaka ciyayi. To, abin da yake cikin daji? Hakika, wannan steppe. Sunan da suka samu daga Faransa natsuwa. Ma'anar kalmar "daji" - fadamun. Geographically suke located in gabas na Great tuddanta, a tsakiyar yamma, Amurka da kuma Canada. A arewa na daji da ke da iyaka Pine gandun daji, a yamma - da duwãtsu a gabas - tare da gandun daji-steppe, kuma a kudu suna motsi a cikin Savannah da kuma Semi-hamada. The adadin hazo a North American matakan rage-rage a cikin shugabanci daga gabas zuwa yamma. A mafi m zones suna located a cibiyar. Saboda haka, a cikin daji ciyayi ne iri-irin, shi ne located in uku m makada: tsayi, gauraye da nizkotrave.

Relief na North American prairies

Mene ne wani daji na Great sararan kasa cikin sharuddan taimako? Wannan yanki kara tare da Cordillera. Yana da wani fairly lebur surface da kananan m yankunan. A gaskiya, wannan tudu low tudu, wanda yake a ci gaba da Western filayen gabas zuwa yamma. A talakawan tsawo na wannan sashi ne a cikin 1.5 kilomita saman teku matakin. River zuwa gabas da kuma kauce wa kasance a cikin kwari na biyu koguna: Missouri da Mississippi. Da zarar wannan yanki an tsoho teku kasa, daga abin da aka hada da adibas. Prairie za a iya raba hudu physiographic yankuna: uku plateaus - Edwards, Missouri, Llano Estacado - da kuma tsakiyar ɓangare na Great filayen.

sauyin yanayi

Ainihin bangaren na dukan sauyin yanayi a North America - shi ne ya kwarara daga iska ɗauke da danshi daga tekun Pacific. Amma da daji ruwa kusa da kuskure - shi ya zauna a cikin Rocky da kuma Cascade Mountains da kuma Sierra Nevada. Dry iska sunã gaggãwa ta hanyar steppe ba tare da cikas ba, fãce da ya kwarara daga gumi Gulf of Mexico. wadannan tarurruka kawo karshen tare da bazara saukar aradu da hadari, in winter - nauyi snowfalls. A general, da prairies ne halayyar m tsananin iska. A zafin jiki a nan Continental - bambanci. Summer - wani talakawan na 20-25 digiri Celsius a cikin hunturu - -25. Frosts kuma -50 digiri. A gabas da sauyin yanayi ne mafi m - a cikin shekara iya fada zuwa 600 mm na ruwan sama. A yammacin ɓangare na drier, shi ne na kullum ba ya wuce 300 mm. Aƙalla kowane shekara biyar a kan prairies akwai gobara. Amma da wuta aka tseren, kamar yadda mai mulkin, sosai da sauri, ba tare da yawa rauni ƙasar.

A Flora na daji

Mene ne wani daji cikin sharuddan Flora? Halitta da ciyayi - steppe da steppe. Da farko bayyana ta ciyawa-makiyayar da kuma Aspen kuma Birch Ashtarot. Wannan sashi an located tare da Canada iyaka. Bugu da ari kudu a chernozem ƙasa kafa kai tsaye daji. Ga akwai low bushes (mesquite da itacen ƙirya) da kuma undersized da baki ciyawa murfin. A mafi kudancin yankunan bayyana yucca, cacti da agaves. Ciki akwai daji gandun daji samuwar. A arewa - Birch. A kudu - itatuwan oak, mesquite, itacen kuma Juniper. A halin yanzu daji Flora shigarsu canje-canje a matsayin tati ga mafi part ci gaba da manoma da kuma a kai a kai noman.

The dabba duniya daji

Animals Prairie ban sha'awa, amma, kazalika da ciyayi, ba su bambanta ba bambancin. daji karnuka - zumunta na gina jiki sun fi na kowa. Its sunan da suka samu saboda Shusha Barking sauti da cewa wuce juna hadari sakonni. Live daji karnuka a manyan mazauna. Suna zaune a burrows wajen rikitarwa tsarin. Dwellings za a iya located a zurfin of 5 mita. Wadannan halittu suke abinci ga na gida da yara: Blackfoot ferrets, daji shaho, coyotes, badgers, rattlesnakes da zomo owls. A can baya mun rayu a cikin daji da yawa Garkunan bauna. A wani lokaci da suka kasance a kan gab da karewa saboda m farauta a gare su. Don kwanan wata, wadannan manyan dabbobi an kare doka. Har yanzu isasshe yawa coyotes. Daga cikin tsuntsaye za a iya lura daji takaddamarsu, Canada geese da geese.

Fadada na daji gobara da kuma gudummawar da bison

Wa ya sani, watakila a yau, babu wanda zai zama babu tambaya game da abin da daji, idan ba duk gobara ne guda bauna. Masana kimiyya yi imani da cewa a cikin wadannan wurare na dogon lokaci da zai kara da gandun daji, bisa ga ƙasa, da yanayin damina na yankin. Da gobarar daji da cewa ya ƙone dukan abin da ya ga ƙasa, da na shanu da dabbobi don overeat da kuma gaba daya tattakewa matasa harbe, ya yi da abin zamba. Masana kimiyya yi nasu karshe dangane da irin wannan tafiyar matakai a Afirka, inda giwaye kuma taimakawa wajen yaduwar steppe ciyayi. Kuma haka kafa cikin sararin daji ... Dubi photo - yadda kyau ita!