Video: Hom kev faib cov pej xeem twg ntau tshaj?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Clamped kev faib tawm yog cov feem ntau hom ntawm dispersion pom nyob rau hauv qhov. Hauv clumped kev faib tawm , qhov kev ncua deb ntawm cov neeg nyob sib ze raug txo kom tsawg.
Ua raws li qhov no hauv kev txiav txim siab, hom kev faib tawm dab tsi yog qhov tsawg tshaj plaws hauv qhov xwm txheej?
Random faib
Tom qab ntawd, lo lus nug yog, cov pejxeem faib li cas? Cov kab mob hauv a pej xeem tej zaum faib nyob rau hauv ib tug uniform, random, los yog clumped qauv. Uniform txhais tau tias tus pej xeem yog sib npaug spaced, random qhia random spacing, thiab clumped txhais tau tias tus pej xeem yog faib hauv pawg.
Ntxiv mus, dab tsi yog peb qhov kev faib tawm ntawm cov pejxeem?
Uniform, clumped, thiab Random yog cov peb hom qauv ntawm cov pejxeem faib . Khoom noj khoom haus thiab kev pab cuam ncaj qha proportional rau ib qho tshwj xeeb kev faib tawm . Random kev faib tawm tshwm sim thaum ob peb pollen nplej ntawm ib co paj tau nqa los ntawm cua los yog muv.
Vim li cas random faib thiaj li tsawg?
Random faib yog tsis tshua muaj nyob rau hauv cov xwm txheej raws li biotic yam, xws li kev sib cuam tshuam nrog cov neeg nyob sib ze, thiab cov yam ntxwv abiotic, xws li kev nyab xeeb lossis av, feem ntau ua rau cov kab mob sib kis los yog sib kis.
Pom zoo:
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)
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
Txoj kev faib cov ntaub ntawv twg muab cov ntaub ntawv sib npaug ntawm cov ntaub ntawv lossis cov kev tshuaj xyuas hauv txhua chav kawm cov ntaub ntawv?
Quantile. txhua chav kawm muaj cov yam ntxwv sib npaug. Ib qho kev faib tawm ntau yog zoo haum rau cov ntaub ntawv faib tawm. Quantile muab tib tus lej ntawm cov ntaub ntawv muaj nuj nqis rau txhua chav kawm
Dab tsi yog kev faib cov pej xeem hauv ecology?
Hauv ecology, cov pejxeem muaj tag nrho cov kab mob ntawm ib hom tsiaj uas nyob hauv ib cheeb tsam. Cov pej xeem kuj tuaj yeem piav qhia txog kev faib tawm, lossis kev faib tawm, ntawm cov tib neeg uas tsim nws. Cov tib neeg tuaj yeem muab faib ua ib qho sib xws, random, lossis clumped qauv
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