Hauv kev sim tsim qhov sib txawv ntawm cov ntoo thiab hav zoov uas yog ob peb yam uas yuav tsum tau muab rau hauv kev xav, tab sis peb yuav tsum pib nrog qhov tseem ceeb uas sib txawv ntawm ob qho no. Qhov sib txawv tseem ceeb ntawm cov ntoo thiab hav zoov yog tus nqi ntawm cov ntoo npog ntawm cov ntoo qhov ntom ntom.
Nyob rau hauv hav zoov, muaj ib tug thicker canopy cover vim lub hav zoov muaj ntau ntoo npog loj npaum li cas ntawm cov av thaum nyob rau hauv cov ntoo koj yuav pom ib tug sparser ntom ntawm cov ntoo. Qhov no ua rau cov ntoo muaj qhov qhib qhib ntau dua uas yuav kawg muab qhov ntxoov ntxoo tsawg dua thiab cov av qhuav.
Tsis tas li ntawd, ob lub ntsiab lus no txawv ntawm cov ecosystems thiab lawv nyob hauv ntau hom tsiaj qus.
Yog tias peb xav kom muaj kev nkag siab keeb kwm ntawm qhov sib txawv ntawm hav zoov thiab hav zoov, nws yuav coj peb rov qab mus rau Hnub Nyoog Nrab lossis tsaus ntuj thaum hav zoov tau siv rau kev yos hav zoov.
Yog tsis muaj ado ntxiv, peb yuav dhia mus rau hauv lub ncauj lus kom raug. Peb yuav sib tham txog ob lub tswv yim no sib cais kom peb yuav piav qhia meej txog qhov hav zoov thiab hav zoov yog dab tsi.
Thiab peb yuav sib txawv ntawm ob los ntawm kev siv cov ntaub ntawv muab los ntawm UN Food and Agricultural Organization (FAO) thiab US National Vegetation Classification system.
Hav zoov yog dab tsi?
raws li Food and Agriculture Organization (FAO), ib lub hav zoov yog ib qho chaw uas muaj ntoo uas tsis tsawg tshaj li 5 meters siab. Txhais tau hais tias ib lub hav zoov yuav tsum muaj cov ntoo uas siab tshaj 16 feet. Cov ntoo no yuav tsum npog thaj tsam ntawm thaj av uas tsis pub tsawg tshaj 0.5 hectares thiab muab lub npog npog tsis pub tsawg tshaj 10%.
Nyob rau hauv ib lub hav zoov, koj yuav tsum tau nrhiav cov ntoo hluas uas ntev li 5 meters thiab tseem muab ib lub canopy ntawm tsis tsawg tshaj li 10%.
Tsis tas li ntawd, hav zoov tau paub tias yog tsev rau ntau hom tsiaj. Qee hom tsiaj uas koj tuaj yeem pom hauv hav zoov muaj xws li noog, amphibians thiab tsiaj txhu.
Nco ntsoov tias lub hav zoov yuav tsum tsis txhob suav nrog thaj av uas ib txwm siv los ua liaj ua teb lossis ua liaj ua teb.
Raws li US National Vegetation Classification system, ib lub hav zoov yog ib qho chaw nrog cov ntoo uas muab cov ntoo kaw - cov ntoo no muaj qhov siab siab tshaj tsis pub tsawg tshaj 6 meters thiab muab npog ntawm 60% - 100%.
Hom Forest Biome
Hav zoov yog ua los ntawm tsob ntoo biomes thiab lawv yog:
Temperate Forests
Cov hav zoov kub muaj plaub lub caij sib txawv hauv ib xyoos, thiab qhov kub ntawm cov hav zoov no yuav txawv ntawm lub sijhawm sib txawv thiab lub caij nyoog ntawm lub xyoo.
Vim yog qhov xwm txheej ntawm hav zoov kub, koj yuav pom ntau hom tsiaj uas muaj peev xwm hloov tau rau qhov sib txawv ntawm cov hav zoov no. Qee cov tsiaj uas koj tuaj yeem pom hauv hav zoov hav zoov suav nrog mos lwj, raccoons, hma, squirrels thiab hibernating bears.
Tropical Forests
Cov hav zoov kub kub muaj qhov kub thiab txias dua, thiab noo noo ntau dua. Cov hav zoov no tsuas muaj nyob rau hauv qhov chaw uas nyob ze rau ntawm txoj kab nruab nrab.
Qhov no yog ib hom hav zoov uas koj yuav pom cov tsiaj xws li nquab lom, jaguars, thiab gorillas. Qhov no yog vim muaj dej nag ntau nyob rau hauv qhov chaw uas muaj hav zoov hav zoov nyob. Tropical rainforests muab cov ntoo txaus thiab tuab tuab los ua kom qhov chaw tsaus thiab nyab xeeb rau cov tsiaj uas tau hais los no kom vam meej.
Boreal Forests
Cov no yog hom Frost uas muaj qhov txias heev. Siberia thiab Alaska yog ob peb qhov chaw uas koj tuaj yeem nrhiav tau yooj yim hav zoov zoo li no.
Hom hav zoov no pab tau zoo nrog carbon capture. Nws qhov kub thiab txias ua rau nws ua tau rau cov tsiaj xws li moose, reindeer, arctic hares, thiab polar bears kom vam meej hauv nws.
Ntoo yog dab tsi?
Raws li FAO thaj av npog nrog cov ntoo ntawm 5 meters thiab siab dua spans thoob plaws 0.5 hectares ntawm av muab ib tug canopy ntawm 5 - 10 feem pua yog suav hais tias yog ntoo. Qhov no txhais tau hais tias cov ntoo muab cov ntoo tsis ntau tshaj 10% lossis nws yuav suav tias yog hav zoov. Qhov no canopy cover yuav muab los ntawm shrubs, ntoo thiab bushes.
Raws li ib daim ntawv qhia los ntawm US National Vegetation Classification cov qauv woodland muaj qhov qhib qhib ntau dua li ntawm 5 - 60 feem pua cov ntaub npog los ntawm kev tswj hwm ntawm cov ntoo. Yog tias lub npog npog yog siab tshaj qhov feem pua ntawm cov lus hais saum toj no ces nws yuav raug suav hais tias yog hav zoov.
Hauv North America sawv ntawm cov ntoo uas muaj nyob ua ntej xyoo 1600 yog hu ua "laus-loj hlob hav zoov," thaum nyob rau hauv UK nws yog hu ua "ncient woodlands," nws tag nrho nyob ntawm seb koj nyob qhov twg.
Cov neeg Australians xav txog cov nroj tsuag ntoo uas muaj cov ntoo kom npog 10 - 30 feem pua ntawm cov ntoo. Lawv muaj ntoo siab thiab qis nrog cov ntoo siab tshaj 98 ko taw thiab ntoo hauv qab 30 ko taw.
Raws li ib tsab xov xwm luam tawm los ntawm SigBusiness.com, ntoo yuav muaj ntau qhib canopy thaum hav zoov yuav muaj ntau kaw canopy cover – ua rau cov ntoo tsim qhov chaw rau cov tsiaj uas nyob rau hauv av thiab lub hav zoov haum qhov chaw rau cov tsiaj uas nyob tshwj xeeb ntawm cov ntoo.
Sau ntawv cia Ncua