Video: Dab tsi yog kev faib cov pej xeem hauv ecology?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Hauv ecology , a pej xeem muaj tag nrho cov kab mob ntawm ib hom tsiaj uas nyob hauv ib cheeb tsam. A pej xeem tuaj yeem piav qhia nyob rau hauv cov nqe lus ntawm kev faib tawm , los yog dispersion, ntawm cov neeg uas tsim nws. Cov tib neeg tuaj yeem muab faib ua ib qho sib xws, random, lossis clumped qauv.
Ib yam li ntawd, kev faib tawm hauv ecology yog dab tsi?
Kev faib tawm : Thaj chaw thaj chaw uas cov neeg ntawm ib hom tshwm sim. Kev nplua nuj: Tus naj npawb ntawm cov neeg nyob hauv ib cheeb tsam. Ecologists sim nkag siab txog yam xwm txheej twg txiav txim siab kev faib tawm thiab abundance ntawm hom. Pej xeem: Pab pawg neeg sib cuam tshuam ntawm tib hom tsiaj nyob hauv ib cheeb tsam.
Ib yam li ntawd, 3 hom kev faib pej xeem yog dab tsi? Peb yooj yim hom kev faib cov pej xeem nyob rau hauv ib cheeb tsam ntau yog (los ntawm saum toj mus rau hauv qab) uniform, random, thiab clumped.
Ua raws li qhov kev pom no, kev faib cov pej xeem yog dab tsi?
Kev faib cov pej xeem txhais tau hais tias tus qauv ntawm qhov chaw neeg nyob. Ntiaj teb kev faib cov pejxeem tsis sib npaug. Cov chaw uas muaj neeg nyob tsis tshua muaj neeg tsawg. Cov chaw uas muaj neeg coob coob muaj coob tus neeg. Cov pejxeem Qhov ceev yog feem ntau qhia raws li tus naj npawb ntawm cov neeg ib square kilometers.
Dab tsi yog pej xeem ceev hauv ecology?
Kev txhais ntawm Population Density Hauv biology, cov pejxeem yog pab pawg ntawm cov tib neeg uas muaj tib hom tsiaj uas nyob hauv tib cheeb tsam tib lub sijhawm. Cov pej xeem ceev yog ib qho kev ntsuas ntawm tus naj npawb ntawm cov kab mob uas ua rau a pej xeem nyob rau hauv ib cheeb tsam.
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)
Leej twg tsim cov pej xeem ecology txoj kev xav?
Hauv kev tshuaj xyuas cov pej xeem ntawm cov koom haum qhov teeb meem ntawm kev teeb tsa pej xeem ciam teb yuav tsum tau xav txog. Ib txoj hauv kev siv dav tshaj plaws raws li kev ua haujlwm ntawm Hannan thiab Freeman (1977)
Kev faib cov pej xeem yog dab tsi?
Kev faib cov pej xeem txhais tau hais tias tus qauv ntawm qhov chaw neeg nyob. Kev faib tawm ntawm cov pej xeem hauv ntiaj teb tsis sib xws. Cov chaw uas muaj neeg nyob tsis tshua muaj neeg tsawg. Cov chaw uas muaj neeg coob coob muaj coob tus neeg. Population ceev feem ntau yog qhia raws li tus naj npawb ntawm cov neeg ib square kilometers
Dab tsi yog pej xeem ecology hauv kev lag luam?
Population ecology yog kev kawm txog kev hloov pauv hloov pauv hauv ib pawg ntawm cov koom haum. Siv cov pej xeem raws li lawv theem ntawm kev tsom xam, cov pej xeem ecologists txheeb xyuas qhov kev yug thiab kev tuag ntawm cov koom haum thiab cov koom haum cov ntaub ntawv nyob rau hauv cov pej xeem nyob rau lub sij hawm ntev