Video: Dab tsi yog hom dispersal?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Muaj tsib lub ntsiab hom ntawm noob kev faib tawm : lub ntiajteb txawj nqus, cua, ballistic, dej, thiab los ntawm tsiaj. Qee cov nroj tsuag yog serotinous thiab nkaus xwb cais tawm lawv cov noob nyob rau hauv teb rau ib puag ncig stimulus.
Tsuas yog li ntawd, peb hom dispersal yog dab tsi?
Cov tib neeg ntawm cov pej xeem tuaj yeem faib rau hauv ib qho ntawm peb Cov qauv yooj yim: lawv tuaj yeem ua tau ntau dua lossis tsawg sib npaug sib nrug (uniform kev tawg ), dispersed random yam tsis muaj kev kwv yees (random kev tawg ), los yog pawg hauv pab pawg (clumped kev tawg ).
Tsis tas li ntawd, dispersal pejxeem yog dab tsi? Kev faib tawm ntawm pej xeem . Tus txheej txheem los ntawm cov pab pawg neeg ntawm cov kab mob nyob nthuav dav qhov chaw lossis thaj tsam uas lawv nyob. Dispersal ua haujlwm thaum ib tus neeg muaj kab mob tawm hauv qhov chaw uas lawv tau nyob yav dhau los, lossis hauv qhov lawv yug los, thiab nyob hauv thaj chaw tshiab.
Ib sab saum toj no, muaj pes tsawg hom dispersal muaj?
Muaj ob hom dispersal : active thiab passive. Active kev tawg yog thaum cov kab mob txav los ntawm ib qhov chaw mus rau lwm qhov yam tsis muaj kev pab, xws li puav, noog, thiab npauj npaim. Passive kev faib tawm yog thaum cov kab mob xav tau kev pab txav ntawm qhov chaw mus rau qhov chaw, xws li cov noob, dandelions, lossis burrs.
Dab tsi yog dispersal los ntawm cov tsiaj?
Tsiaj dispersal Tsiaj cais tawm noob nyob rau hauv ntau txoj kev. Txiv hmab txiv ntoo yog digested los ntawm tsiaj , tab sis cov noob dhau los ntawm txoj hnyuv, thiab poob rau hauv lwm qhov chaw. Ib txhia tsiaj txhu faus cov noob, zoo li squirrels nrog acorns, kom txuag tau tom qab, tab sis yuav tsis rov qab mus tau cov noob. Nws tuaj yeem loj hlob mus rau hauv cov nroj tsuag tshiab.
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