{"id":53527,"date":"2019-12-04T00:00:00","date_gmt":"2019-12-03T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/podvodnaya-akustika-mozhet-pomoch-spasti-korallovye-rify"},"modified":"2020-02-18T14:01:26","modified_gmt":"2020-02-18T11:01:26","slug":"podvodnaya-akustika-mozhet-pomoch-spasti-korallovye-rify","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/podvodnaya-akustika-mozhet-pomoch-spasti-korallovye-rify","title":{"rendered":"Undervannsakustikk kan bidra til \u00e5 redde korallrev","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

D\u00f8d af koralrev er et enormt problem, som oceanologer st\u00e5r over for lige nu. En international gruppe forskere fra de britiske universiteter Exeter og Bristol, samt James Cook University i Australien og det Australske Institut for Marine Videnskab, h\u00e6vder, at \"akustisk berigelse\" kunne v\u00e6re et v\u00e6rdifuldt redskab til at hj\u00e6lpe med at genoprette beskadigede koralrev.<\/p>\n

\"Undervannsakustikk<\/p>\n

Mens de arbejdede p\u00e5 at analysere det truede Great Barrier Reef i Australien, har forskere installeret undervandsdynamikere, der afspiller optagelser af sunde rev, p\u00e5 omr\u00e5der med d\u00f8de koraller og opdaget to gange s\u00e5 meget fisk, der ankom \u2014 og blev \u2014 sammenlignet med lignende omr\u00e5der, hvor der ikke blev afspillet lyd. \"Fisk er afg\u00f8rende for at koralrevene fungerer som sunde \u00f8kosystemer,\" sagde Tim Gordon fra Exeter University. \"En stigning i fiskepopulationen p\u00e5 denne m\u00e5de kan hj\u00e6lpe med at starte processerne for naturlig genopretning og modvirke den skade, vi ser p\u00e5 mange koralrev verden over.\"<\/p>\n

Denne nye metode fungerer ved at afspille de lyde, der forsvinder, n\u00e5r revene degraderes. \"Sunde koralrev er overraskende st\u00f8jende steder: klikkende rejer, br\u00f8len og grynten fra fisk skaber et str\u00e5lende biologisk lydlandskab. Disse lyde tiltr\u00e6kker unge fisk, n\u00e5r de s\u00f8ger et sted at sl\u00e5 sig ned,\" sagde professor Steve Simpson fra Exeter University. \"Rev bliver sp\u00f8gelsesagtigt stille, n\u00e5r de degraderes, da rejer og fisk forsvinder, men ved hj\u00e6lp af h\u00f8jttalere, der genskaber dette tabte lydlandskab, kan vi igen tiltr\u00e6kke unge fisk.\"<\/p>\n

Fiskebiologen fra det Australske Institut for Marine Videnskab, Dr. Mark Meekan, tilf\u00f8jede: \"Selvf\u00f8lgelig vil tiltr\u00e6kning af fisk til et d\u00f8dt rev ikke automatisk bringe det tilbage til livet, men genopretningen underst\u00f8ttes af fisk, der rydder revet og skaber plads til, at koraller kan vokse.\"<\/p>\n

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En unders\u00f8gelse har vist, at overf\u00f8rsel af lyde fra sunde rev fordoblede det samlede antal fisk, der blev fanget i de eksperimentelle levesteder for reven, og samtidig \u00f8gede antallet af tilstedev\u00e6rende arter med 50 %. Denne diversitet omfattede arter fra alle niveauer i f\u00f8dek\u00e6den \u2013 plante\u00e6dere, detritivorer, plankton\u00e6dere og rovfisk. Forskellige grupper af fisk udf\u00f8rer forskellige funktioner p\u00e5 koralrev, hvilket betyder, at en rig og varieret fiskebestand er en vigtig faktor for opretholdelse af et sundt \u00f8kosystem.<\/p>\n

\"Undervannsakustikk<\/p>\n

Professor Andy Radford fra University of Bristol sagde: \u00abAkustisk berigelse er en lovende metode til lokal forvaltning. I forbindelse med genopretning af levesteder og andre naturbeskyttelsesforanstaltninger kan genetablering af fiskesamfund p\u00e5 denne m\u00e5de fremskynde genoplivningen af \u00f8kosystemer. Men vi skal fortsat tackle mange andre trusler, herunder klimaforandringer, overfiskeri og vandforurening, for at beskytte disse skr\u00f8belige \u00f8kosystemer.\u00bb<\/p>\n

Hr. Gordon tilf\u00f8jede: \u00abSelvom tiltr\u00e6kning af flere fisk ikke i sig selv vil redde koralrevene, giver nye metoder som denne os flere v\u00e6rkt\u00f8jer i kampen for at redde disse v\u00e6rdifulde og s\u00e5rbare \u00f8kosystemer. Fra innovationer inden for lokal forvaltning til internationale politiske tiltag er der behov for betydelige fremskridt p\u00e5 alle niveauer for at sikre en bedre fremtid for revene rundt omkring i verden.\u00bb<\/p>\n

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Kilde: 3dnews.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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