Pisaster ochraceus hiav txwv hnub qub tau raug xa mus ntev li keystone hom nyob rau hauvrocky intertidal (Paine 1966, Menge 2004) thiab, thaum lawv paub tias muaj kev noj zaub mov dav (suav nrog barnacles, qwj, limpets, thiab chitons), mussels yog lawv cov khoom prey ntawm ntug dej hiav txwv (Morris li al. 1980, Harley li al 2006).
Dab tsi ua rau lub hnub qub hiav txwv yog hom pob zeb?
hiav txwv hnub qub yog cov tswv cuab tseem ceeb ntawm ib puag ncig marinethiab suav tias yog hom pob zeb tseem ceeb. Ib hom pob zeb tseem ceeb tua tsiaj uas tsis muaj lwm yam tsiaj nyeg thiab yog tias lawv raug tshem tawm ntawm ib puag ncig, lawv cov tsiaj nyeg yuav nce ntxiv thiab tuaj yeem tshem tawm lwm hom tsiaj.
Puas yog lub hnub qub hiav txwv yog lub pob zeb lossis cov cim qhia?
Starfish yog ib qho ntawm cov tsiaj uas muaj ntau tshaj plaws nyob rau hauv ntug dej hiav txwv pas dej thiab lwm qhov chaw ntiav ze ze ntawm ntug dej, thiab qee hom, xws li West Coast's ocher hiav txwv hnub qub (Pisaster ochraceus) thiab hnub qub hiav txwv hnub qub (Pycnopodia helianthoides) - qhov loj tshaj plaws. hiav txwv hnub qub nyob ntiaj teb - yog xav txog hom pob zeb.
Vim li cas ntshav hiav txwv hnub qub yog hom pob zeb tseem ceeb?
Nyob rau xyoo 1960, lub hnub qub liab qab hiav txwv yog ib hom thawj zaug lees paub tias yog pob zeb tseem ceeb. Nws lub xub ntiag ua kom cov pas dej ntws sib npaug thiab tiv thaiv cov mussels los ntawm kev tswj hwm ecosystem. Hloov chaw, feem ntau ntawm cov tsiaj nyeg ploj lawm. …
ntses hnub qub pab txhawb rau lub ecosystem li cas?
Nkauj hnub qub yog ib tugmarine invertebrate. … Yog li cov ntses hnub qub yog predators, thiab tej zaum lawv yog cov tsiaj nyeg tseem ceeb tshaj plaws nyob rau hauv qhov dej ntiav - yog li qhov tob uas peb yuav dhia dej lossis ua luam dej. Lawv noj txhua yam uas lawv tuaj yeem hla. Lawv cov dej num pub mis tswj tag nrho cov ecosystem.
