Qhov sib txawv tseem ceeb ntawm kev sib cais thiab kev sib cais yog qhov kev faib tawm yog kev tsiv teb tsaws ntawm ib feem ntawm cov pej xeem mus rau thaj chaw tshiab thoob plaws thaj chaw uas muaj nyob rau yav dhau los thaum vicariance yog kev faib ntawm cov pejxeem vim qhov pom ntawm thaj chaw tshiab.
Disjunct faib yog kev sib cais ntawm pawg taxonomic muaj feem rau hauv thaj chaw sib txawv. Cov qauv ntawm thaj chaw tsis tu ncua ntawm cov pej xeem no tshwm sim vim muaj ob yam xwm txheej tseem ceeb: kev sib cais thiab kev sib cais. Dispersal yog kev tsiv teb tsaws ntawm taxa mus rau hauv thaj chaw sib txawv ntawm thaj chaw uas muaj nyob hauv thaj chaw xws li roob saw. Nyob rau hauv sib piv, vacariance yog kev sib cais ntawm pawg taxonomic vim qhov tshwm sim ntawm thaj chaw tshiab teeb meem xws li dej hiav txwv, roob, thiab lwm yam. Txawm li cas los xij, ob txoj kev ua rau muaj kev sib cais ntawm cov pej xeem los ntawm thaj chaw teeb meem.
Dispersal yog dab tsi?
Dispersal yog kev tsiv teb tsaws ntawm ib feem ntawm cov pej xeem mus rau thaj chaw tshiab, hla dhau qhov kev txwv ntawm thaj chaw. Yog li ntawd, cov tswv cuab ntawm ib pawg ntawm cov kab mob sib cais los ntawm ib leeg los ntawm thaj chaw teeb meem thiab qhia thaj chaw tsis tu ncua kev faib tawm vim muaj kev sib cais. Qhov kev sib cais ntawm cov pejxeem no yuav ua rau muaj kev sib txawv ntawm cov se tshiab nrog lub sijhawm vim yog allopatric speciation.
Daim duab 01: Allopatric Speciation
Vim kev hlub yog dab tsi?
Vicariance yog ib qho kev piav qhia rau thaj chaw tsis tu ncua ntawm cov tsiaj. Ntxiv mus, nws yog thawj tus qauv ntawm alollpatric speciation. Hauv kev sib txawv, kev faib ntawm cov tswv cuab ntawm cov pej xeem tshwm sim vim qhov pom ntawm thaj chaw tshiab. Yog li, lawv sib cais los ntawm ib qho kev thaiv thaj chaw tshiab. Yav dhau los, lawv tau faib dav. Tam sim no vim qhov tshwm sim ntawm ib qho kev thaiv tshiab, lawv qhia txog kev faib tawm. Cov teeb meem ntawm thaj chaw no tuaj yeem tshwm sim vim kev tsim cov roob, tsim cov dej ntws los yog cov dej hauv dej, tshem tawm cov choj av, tsim cov Islands tuaj, thiab lwm yam.
Dab tsi yog qhov zoo sib xws ntawm Kev Sib Nrauj thiab Vicariance?
- Dispersal thiab vicariance yog ob qho lus piav qhia rau kev faib tawm ntawm cov kab mob.
- Nyob rau hauv ob qho tib si, kab mob qhia txog thaj chaw faib khoom tsis tu ncua.
- Cov kab mob sib cais vim yog thaj chaw teeb meem hauv ob qho lus piav qhia.
- Lawv tuaj yeem ua rau qhov sib txawv ntawm cov se tshiab vim yog allopatric speciation.
- Tsis tas li ntawd, kev sib cais thiab kev sib cais tsis yog kev sib koom ua ke.
Dab tsi yog qhov txawv ntawm Dispersal thiab Vicariance?
Dispersal and vicariance is two theories that makes disjunct distribution of population. Hauv kev tawg, ib feem ntawm cov pej xeem tsiv mus nyob thoob plaws thaj chaw uas twb muaj lawm nyob rau hauv cheeb tsam tshiab. Nyob rau hauv sib piv, vicariance tshwm sim vim qhov tsos ntawm ib tug tshiab geographic barrier uas cais cov pejxeem. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm kev sib cais thiab kev sib cais.
Summary – Dispersal vs Vicariance
Kev faib tawm thiab kev sib cais yog ob txoj hauv kev biogeographic uas piav qhia txog kev faib tawm ntawm cov kab mob. Ob qho txheej txheem ua rau muaj kev sib cais ntawm cov pej xeem los ntawm thaj chaw teeb meem. Hauv kev sib cais, kev sib cais ntawm cov pej xeem tshwm sim thaum ib feem ntawm cov neeg tsiv teb tsaws chaw hla thaj chaw uas muaj nyob hauv thaj chaw. Nyob rau hauv vicariance, qhov kev sib cais tshwm sim vim qhov tshwm sim ntawm ib tug tshiab geographic barrier uas faib cov pejxeem. Yog li, kev tsiv teb tsaws chaw yog lub luag haujlwm rau kev sib cais thaum qhov tshwm sim ntawm thaj chaw tshiab yog lub luag haujlwm rau kev sib txawv. Nov yog cov ntsiab lus ntawm qhov sib txawv ntawm kev sib cais thiab kev sib cais.
