Video: Dab tsi yog hom keystone thiab vim li cas lawv tseem ceeb?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Keystone hom yog ib qho tseem ceeb rau lawv qhov tshwj xeeb ecosystem thiab chaw nyob , raws li lawv ua lub luag haujlwm suav tias tseem ceeb rau lub neej ntawm cov tsiaj uas sib koom lawv lub tsev. Lawv txhais tag nrho ecosystem . Yog tsis muaj nws cov keystone hom, ecosystems yuav txawv heev los yog tsis muaj nyob rau hauv tag nrho.
Hauv qhov no, hom keystone yog dab tsi?
hom keystone . [kē'stōn'] A hom nws lub xub ntiag thiab lub luag hauj lwm nyob rau hauv ib tug ecosystem muaj ib tug disproportionate cuam tshuam rau lwm yam kab mob nyob rau hauv lub system. A hom keystone feem ntau yog cov neeg tua tsiaj uas muaj zog tshaj plaws uas nws qhov kev tshem tawm tso cai rau cov neeg raug tsim txom tawg thiab feem ntau txo qis kev sib txawv.
Ib tug kuj yuav nug, yuav ua li cas hom pob zeb tseem ceeb nyob rau hauv tag nrho cov zaub mov web ntawm lub ecosystem? A hom keystone exerts top-down cawv nyob rau hauv qis trophic theem thiab tiv thaiv hom nyob rau theem qis trophic los ntawm monopolizing cov peev txheej tseem ceeb, xws li kev sib tw rau qhov chaw lossis tus tsim khoom tseem ceeb zaub mov qhov chaw. Daim ntawv no sawv cev rau ib lub pas dej hauv qhov kev piav qhia ntawm ecological kev sib raug zoo ntawm hom.
Dhau li ntawm no, dab tsi yog ib co piv txwv ntawm ib hom keystone?
Qee qhov piv txwv ntawm hom keystone suav nrog tus nyuj, prairie dog, thiab otter. Cov no yog hom keystone vim lawv muaj kev cuam tshuam loj heev rau lawv cov ecosystem, thiab tsis muaj lawv, tus ecosystem yuav hloov lossis raug kev txom nyem.
Puas yog tib neeg yog hom keystone?
Ecologists tau txheeb xyuas ntau yam hom keystone , txhais tau tias yog cov kab mob uas muaj kev cuam tshuam ntau dua ntawm kev cuam tshuam txog kev cuam tshuam ntawm lawv cov biomass. Ntawm no peb txheeb xyuas tib neeg tsiaj txhu raws li kev txiav txim siab dua lossis 'hyperkeystone' hom uas tsav txoj kev sib tshuam sib txuas los ntawm kev cuam tshuam rau lwm tus keystone cov neeg ua yeeb yam thoob plaws thaj chaw sib txawv.
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