Video: Dab tsi ua rau biodiversity hotspot?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
A biodiversity hotspot yog ib cheeb tsam biogeographic uas yog ob qho tib si tseem ceeb reservoir biodiversity thiab raug hem nrog kev puas tsuaj. Lub sij hawm biodiversity hotspot tshwj xeeb yog hais txog 25 thaj chaw nplua nuj nyob hauv ntiaj teb uas tau ploj yam tsawg kawg 70 feem pua ntawm lawv qhov qub chaw nyob.
Hais txog qhov no, dab tsi yog cov txheej txheem rau kev txiav txim siab txog biodiversity hotspot?
Txhawm rau tsim nyog raws li biodiversity hotspot ntawm Myers 2000 ib tsab ntawm hotspot-daim ntawv qhia, cheeb tsam yuav tsum ua tau raws li ob txoj cai nruj: nws yuav tsum muaj tsawg kawg yog 0.5% lossis 1,500 hom nroj tsuag vascular raws li cov kab mob endemics, thiab nws yuav tsum tau poob tsawg kawg 70% ntawm nws thawj cov nroj tsuag. Thoob plaws ntiaj teb, 36 thaj chaw tsim nyog raws li cov ntsiab lus no.
Tsis tas li ntawd, muaj pes tsawg biodiversity hotspots muaj? IUCN npaj 'Red Data Book'. Nyob ntawd yog 34 thaj chaw thoob ntiaj teb uas tsim nyog raws li Biodiversity hotspots . Cov no hotspots sawv cev tsuas yog 2.3% ntawm tag nrho lub ntiaj teb thaj av. Cov no hotspots tseem ceeb vim Biodiversity underpins tag nrho lub neej nyob rau hauv lub ntiaj teb no.
Yog li ntawd, dab tsi ua rau biodiversity hotspots?
Biodiversity hotspots Tam sim no npog tsuas yog 1.4% ntawm thaj av hauv ntiaj teb, thaum lawv pib npog 12% ntawm thaj av [10]. Cov xwm txheej, xws li kev ua qias tuaj, kev siv av, kab mob invasive, deforestation, thiab kev hloov huab cua yog qhov ua rau ua rau ntawm vaj tse poob thiab kev puas tsuaj [11].
Cov piv txwv ntawm biodiversity hotspots yog dab tsi?
Piv txwv ntawm biodiversity hotspots yog hav zoov hav zoov raws li lawv niaj hnub ntsib kev puas tsuaj thiab degradation vim kev txiav txim siab tsis raug cai, muaj kuab paug thiab ua hav zoov. Raws li Myers 2000 tsab ntawm lub hotspot -map, ib cheeb tsam tsuas yog tsim nyog raws li a biodiversity hotspot yog nws ntsib ob yam.
Pom zoo:
Peb yuav faib biodiversity li cas?
Biodiversity suav nrog peb hom tseem ceeb: kev sib txawv hauv hom (genetic diversity), nruab nrab ntawm hom (species diversity) thiab nruab nrab ntawm ecosystems (ecosystem diversity)
Hom keystone cuam tshuam li cas rau biodiversity?
Keystone predators tuaj yeem ua rau muaj kev sib txawv ntawm cov zej zog los ntawm kev tiv thaiv ib hom tsiaj los ua tus tseem ceeb. Lawv tuaj yeem muaj kev cuam tshuam loj heev ntawm kev sib npaug ntawm cov kab mob hauv ib qho chaw ecosystem
Lub cheeb tsam dej hiav txwv twg muaj biodiversity loj tshaj plaws thiab lub neej dej hiav txwv tshaj plaws?
Epipelagic cheeb tsam nthuav tawm ntawm qhov chaw mus txog 200m nqes. Nws tau txais ntau lub hnub ci thiab yog li muaj cov biodiversity tshaj plaws nyob rau hauv dej hiav txwv. Nws tseem hu ua thaj tsam twilight vim tias lub teeb txwv tsis pub muaj peev xwm lim tau los ntawm cov dej no
Dab tsi yog qhov tseem ceeb tshaj plaws uas yuav tsum muaj rau cov kua dej ntws hauv cov kav dej Dab tsi lwm yam cuam tshuam rau cov dej ntws?
Thaum ib qho kev quab yuam sab nraud yog exerted rau ntawm cov kua uas muaj, qhov tshwm sim siab yog kis sib npaug thoob plaws hauv cov kua. Yog li txhawm rau kom dej ntws, dej xav tau qhov sib txawv siab. Cov kav dej kuj tuaj yeem cuam tshuam los ntawm cov kua dej, cov yeeb nkab loj, qhov kub thiab txias (cov kav dej khov), cov kua dej ntom ntom
Vim li cas Succulent Karoo yog biodiversity hotspot?
Lub Succulent Karoo biome yog qhov chaw thoob ntiaj teb lees paub biodiversity hotspot, thiab yog lub ntiaj teb tsuas yog arid hotspot. Qhov no biodiversity yog vim loj speciation ntawm ib tug arid-adapted biota nyob rau hauv teb rau tshwj xeeb climatic tej yam kev mob thiab siab heterogeneity ib puag ncig