Qhov tob tshaj plaws ntawm dej hiav txwv, Challenger Deep (hauv Mariana Trench, nyob rau sab hnub poob Pacific Dej hiav txwv), yog li 11,000 m (kwv yees 6.8 mi) tob. Txhawm rau muab qee qhov kev xav ntawm qhov tob ntawm qhov trench no, dej hiav txwv yog, qhov nruab nrab, 4267 m lossis 14,000 ft tob.
7 dej ecosystems yog dab tsi?
Aquatic Ecosystems and Watersheds
Aquatic ecosystems include oceans, pas dej, dej, kwj, estuaries, thiab wetlands.
3 qhov dej hiav txwv loj yog dab tsi?
Cov ntug dej hiav txwv, dej hiav txwv, pas dej, thiab ntug hiav txwv estuaries yog tag nrho cov dej ecosystems-cov ntsiab lus tseem ceeb ntawm lub ntiaj teb cov txheej txheem dynamic thiab tseem ceeb rau tib neeg kev lag luam thiab kev noj qab haus huv. Wetlands txuas av thiab dej, ua raws li ntuj lim, txo cov pa phem, tswj dej nyab, thiab ua chaw zov me nyuam rau ntau hom dej.
Dab tsi yog hauv qab ntawm cov dej ecosystem?
Layers. Cov txheej hauv cov dej hauv dej muaj xws li cov khoom siv ntawm hauv qab ntawm lub cev dej, feem ntau xuab zeb, pob zeb lossis av nkos. Tom ntej no yog cov dej nws tus kheej, uas tuaj yeem yog dej tshiab lossis dej ntsev thiab zoo li qub lossis txav mus. Piv txwv li ib tug dej ntws tab sis ib tug swamp nyob twj ywm thiab tsis txav.
hom dej ecosystem twg yog biodiversity tshaj plaws?
Aquatic biodiversity is greatest in tropical latitudes. Piv txwv li, kwv yees li 3,000 hom ntses muaj nyob hauv Amazon River ib leeg. Coralcov chaw nyob reef kuj muaj biodiversity siab heev; ze li ntawm ib feem peb ntawm tag nrho cov paub marine hom muaj nyob rau hauv coral reefs.
