Atristain Vega, MirenLarrañaga Arrizabalaga, Aitorvon Schiller Calle, DanielElosegi Irurtia, Arturo2024-11-272024-11-27production.44713https://dx.doi.org/10.26876/ikergazte.iv.05.34https://gordailua.ueu.eus/handle/123456789/2522Gero eta gehiago dira munduan bizi-itxaropenaren amaierara iristen ari diren urtegiak. Hori horrela, gero eta ohikoagoa da presa eta urtegiak hustu eta zerbitzuz kanpo uztea ibaien konektibitate longitudinala berreskuratzeko. Ikerketa honen helburua presa handi baten (Enobieta, 42 m) hustuketak ibai-ekosistemen ur-kalitatean eta biodibertsitate eta funtzionamenduan duen eragina aztertzea zen. Horretarako, Artikutzako sare hidrografikoan 8 puntu aukeratu ziren: presaren eraginpean zeuden 4 puntu (inpaktuak) eta inolako eraginik jasaten ez zuten beste 4 puntu (kontrolak). Horietan guztietan hainbat aldagai aztertu ziren hiru fasetan zehar. Aldagai ezberdinek modu ezberdinean erantzun zuten hustuketaren aurrean, baina orokorrean, hustuketak eragin ekologiko handirik ez zuela izan ikusi zen. Gainera, izandako inpaktuak berehala desagertu ziren errekuperazio-fasean zehar.There are more and more dams in the world that are coming to the end of their lifespan. Thus, dam removal is gaining momentum in order to recover stream and river´s longitudinal connectivity. The aim of this work was to assess the effects of the decommissioning of a large dam (Enobieta, 42 m) on water quality and stream biodiversity and functioning. For this purpose, 8 sampling points were selected in the hydrographic network of Artikutza: 4 of them were below the dam (impact sites) and 4 others were in free-flowing streams (controls). We measured various variables in all of these sites during three different phases. Each variable responded in a different way to the reservoir drawdown process, but in general, we found out that the emptying of the reservoir did not have almost any negative ecological effects, and if so, these impacts disappeared quickly during the recovery phase.urtegiak hustutzeauraren kalitateaornogabeakbiofilmaren metabolismoalandarediareservoir drawdowndam removalwater qualityinvertebratesbiofilm metabolismvegetationEkologiaEuskal HerriaGeologiaNatur Zientziakintroduction