Lub paj paj yog dab tsi?
Lub paj paj yog dab tsi?

Video: Lub paj paj yog dab tsi?

Video: Lub paj paj yog dab tsi?
Video: npauj kub xyooj xav ua lub paj muaj muaj zib 2024, Hlis ntuj nqeg
Anonim

Paj yeeb yog tsim los ntawm feem ntau nyom, sedges (grasslike nroj tsuag ), thiab lwm yam flowering nroj tsuag hu ua forbs (e.g. coneflowers, milkweed). Mesic Prairie : Qee cov dej, nruab nrab-ntev av lossis xuab zeb loam av, dej ntws zoo. Cov cheeb tsam no yog cov nyom siab siab: loj bluestem thiab Indian nyom.

Tseem yuav paub yog, dab tsi yog 3 hom nroj tsuag nyob rau prairies?

Hom nroj tsuag yog paj yeeb cordgrass (tseem hu ua ripgut lossis slough nyom), xiav chij, swamp milkweed, thiab ntau hom sedges thiab rushes.

Ib sab saum toj no, yuav ua li cas prairies? Paj yeeb yog ib qho kev tsim kho tshiab tshaj plaws hauv North America, tsim tom qab lub sijhawm Pleistocene glaciation. Kwv yees li 18,000 xyoo dhau los, feem ntau ntawm Illinois tau npog los ntawm cov dej khov. Raws li cov glaciers melted, thaj av tau npog thaum xub thawj nrog tundra hom zaub, ces los ntawm spruce forests.

Kuj paub yog, dab tsi yog nyob rau hauv ib tug prairie?

Paj yeeb yog cov ecosystems suav hais tias yog ib feem ntawm cov nyom nyom, savannas, thiab shrublands biome los ntawm ecologists, raws li cov huab cua zoo sib xws, nag los nag, thiab muaj pes tsawg leeg ntawm cov nyom, tshuaj ntsuab, thiab cov nroj tsuag, ntau dua li cov ntoo, raws li cov nroj tsuag tseem ceeb.

Dab tsi yog prairies siv rau?

A paj yeeb yog ib qho ecosystem uas feem ntau yog tiaj tus thiab dominated los ntawm herbaceous nroj tsuag, tshwj xeeb tshaj yog cov nyom. Ntau yam ntawm paj yeeb ntawm lub ntiaj teb no yav tas los siv rau grazing lub hom phiaj, tab sis vim hais tias grassland av yog tob thiab nplua nuj nyob rau hauv cov as-ham, ntau thiab ntau grasslands raug cultivated.

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