Video: Dab tsi yog cov ntsiab lus ntawm pej xeem dynamics?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Tom qab tag nrho, pej xeem Kev hloov pauv yog txiav txim siab thaum kawg tsuas yog plaub yam: yug, tuag, kev tsiv teb tsaws chaw, thiab kev tsiv teb tsaws chaw. Qhov no pom tseeb simplicity yog dag. Nws yog ib qho yooj yim rau underestimate qhov nyuaj ntawm biotic thiab abiotic kev sib cuam tshuam hauv lub ntiaj teb ntuj uas tuaj yeem cuam tshuam cov plaub no. pej xeem tsis muaj.
Ib yam li ntawd, koj tuaj yeem nug, dab tsi yog cov ntsiab lus ntawm cov pej xeem?
Feem ntau cov ntsiab lus ntawm cov pejxeem muaj xws li hnub nyoog, poj niam txiv neej, thiab haiv neeg, tab sis kuj muaj lwm yam. Cov kws tshawb fawb feem ntau sau cov ntaub ntawv ntawm hnub nyoog thiab poj niam txiv neej rau hauv kab kos, hu ua pej xeem pyramids, uas pab peb to taub pej xeem kev loj hlob.
Tsis tas li ntawd, plaub yam dab tsi uas cuam tshuam rau pej xeem muaj zog? ib tug natural pej xeem uas tag nrho plaub yam uas cuam tshuam rau pej xeem Qhov loj me (kev tuag, kev yug me nyuam, kev tsiv teb tsaws chaw, thiab kev tsiv teb tsaws chaw) tab tom ua haujlwm Txawm hais tias muaj kev sib txawv ntawm cov tsiaj, poj niam ducks nteg txog 10 qe rau ib qho kev sim ua zes.
Kuj nug, dab tsi yog lub ntsiab lus ntawm pej xeem dynamics?
Population dynamics yog ceg ntawm life sciences uas kawm txog qhov loj thiab hnub nyoog muaj pes tsawg leeg cov pejxeem raws li lub tshuab hluav taws xob, thiab cov txheej txheem lom neeg thiab ib puag ncig tsav lawv (xws li kev yug me nyuam thiab kev tuag, thiab los ntawm kev nkag tebchaws thiab kev tsiv teb tsaws chaw).
Vim li cas cov pej xeem dynamics tseem ceeb?
Population dynamics yog kawm li cas thiab vim li cas pejxeem hloov qhov loj thiab cov qauv raws sij hawm. Tseem ceeb yam hauv pejxeem dynamics suav nrog tus nqi ntawm kev yug me nyuam, kev tuag thiab kev tsiv teb tsaws chaw.
Pom zoo:
Dab tsi yog qhov sib txawv ntawm cov alleles ntawm cov tib neeg hauv cov pej xeem hu ua?
Cov Txheej Txheem Sib Sau ntawm Alleles hauv Cov Pej Xeem yog Nws Gene Pas. Population geneticists kawm txog qhov sib txawv uas ib txwm tshwm sim ntawm cov noob hauv cov pejxeem. Kev sau ntawm tag nrho cov noob thiab ntau hom kev hloov pauv lossis allelic ntawm cov noob hauv cov pejxeem yog hu ua nws cov gene pool
Dab tsi yog thaj chaw ntawm pej xeem kev hloov pauv thiab vim li cas nws thiaj li muaj txiaj ntsig thaum kawm txog pej xeem?
Population dynamics yog ceg ntawm lub neej sciences uas kawm txog qhov loj thiab hnub nyoog muaj pes tsawg leeg ntawm cov pejxeem raws li dynamical systems, thiab cov txheej txheem lom thiab ib puag ncig tsav lawv (xws li yug thiab tuag tus nqi, thiab los ntawm kev nkag teb chaws thiab emigration)
Vim li cas cov pej xeem dynamics tseem ceeb?
Population dynamics yog kev kawm txog yuav ua li cas thiab yog vim li cas cov pej xeem hloov nyob rau hauv loj thiab qauv nyob rau hauv lub sij hawm. Cov yam tseem ceeb hauv cov pej xeem muaj zog muaj xws li tus nqi ntawm kev yug me nyuam, kev tuag thiab kev tsiv teb tsaws chaw
Dab tsi yog lub ntsiab lus ntawm kev hloov pauv lom neeg hauv cov ntsiab lus ntawm allele zaus?
Microevolution, los yog evolution ntawm ib tug me me, yog txhais raws li ib tug kev hloov nyob rau hauv lub zaus ntawm noob variants, alleles, nyob rau hauv ib tug pej xeem ntau tiam. Lub teb ntawm biology uas kawm txog allele frequencies nyob rau hauv cov pejxeem thiab yuav ua li cas lawv hloov lub sij hawm yog hu ua pej xeem noob caj noob ces
Ntau npaum li cas ntawm cov pej xeem hauv ntiaj teb nyob ntawm cov kab ke roob rau tag nrho lossis qee qhov ntawm lawv cov dej?
Roob yog lub ntiaj teb "dej yees," muab 60-80% ntawm tag nrho cov dej tshiab rau peb ntiaj chaw. Tsawg kawg ib nrab ntawm lub ntiaj teb cov pej xeem nyob ntawm roob ecosystem kev pabcuam kom muaj sia nyob - tsis yog dej xwb, tab sis kuj muaj zaub mov thiab lub zog huv