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In this study we used directed kelp trawling as a scientific tool to quantify the impacts of broad-scale disturbance on community structure and function. We tested the ecosystem-wide effects of this disturbance in a BACI design using two 15 km<jats:sup>2<\/jats:sup> areas. The disturbance had a substantial impact on the kelp forests in this study, removing 2986 tons of kelp and causing a 26% loss of total kelp canopy at trawled stations. This loss created a 67% reduction of epiphytes, an 89% reduction of invertebrates and altered the fish populations living within these habitats. The effect of habitat loss on fish was variable and depended on how the different species used the habitat structure. Our results show that large-scale experimental disturbances on habitat-forming species have ecological consequences that extend beyond the decline of the single species to affect multiple trophic levels of the broader ecosystem. Our findings have relevance for understanding how increasing anthropogenic disturbances, including kelp trawling and increased storm frequency caused by climate change, may alter ecosystem structure and function.<\/jats:p>","DOI":"10.3354\/meps13426","type":"journal-article","created":{"date-parts":[[2020,7,20]],"date-time":"2020-07-20T12:03:26Z","timestamp":1595246606000},"page":"163-180","update-policy":"https:\/\/doi.org\/10.3354\/policy","source":"Crossref","is-referenced-by-count":48,"title":["Ecosystem-level effects of large-scale disturbance in kelp forests"],"prefix":"10.3354","volume":"656","author":[{"given":"KM","family":"Norderhaug","sequence":"first","affiliation":[{"name":"Institute of Marine Research (IMR), Nye Fl\u00f8devigen vei 20, 4817 His, Norway"},{"name":"University of Oslo, Department of Biosciences, PO Box 1066 Blindern, 0316 Oslo, Norway"}]},{"given":"K","family":"Filbee-Dexter","sequence":"additional","affiliation":[{"name":"Institute of Marine Research (IMR), Nye Fl\u00f8devigen vei 20, 4817 His, Norway"},{"name":"University of Western Australia, School of Biological Sciences, 35 Stirling Hwy, Perth, WA 6009, Australia"}]},{"given":"C","family":"Freitas","sequence":"additional","affiliation":[{"name":"Institute of Marine Research (IMR), Nye Fl\u00f8devigen vei 20, 4817 His, Norway"},{"name":"Marine and Environmental Sciences Center, Madeira Tecnopolo, 9020-105 Funchal, Portugal"}]},{"given":"SR","family":"Birkely","sequence":"additional","affiliation":[{"name":"Institute of Marine Research (IMR), Hjalmar Johansens Gate 14, 9294 Troms\u00f8, Norway"}]},{"given":"L","family":"Christensen","sequence":"additional","affiliation":[{"name":"Institute of Marine Research (IMR), Nye Fl\u00f8devigen vei 20, 4817 His, Norway"}]},{"given":"I","family":"Mellerud","sequence":"additional","affiliation":[{"name":"Institute of Marine Research (IMR), Nye Fl\u00f8devigen vei 20, 4817 His, Norway"}]},{"given":"J","family":"Thormar","sequence":"additional","affiliation":[{"name":"Institute of Marine Research (IMR), Nye Fl\u00f8devigen vei 20, 4817 His, Norway"}]},{"given":"T","family":"van Son","sequence":"additional","affiliation":[{"name":"Institute of Marine Research (IMR), Nye Fl\u00f8devigen vei 20, 4817 His, Norway"}]},{"given":"F","family":"Moy","sequence":"additional","affiliation":[{"name":"Institute of Marine Research (IMR), Nye Fl\u00f8devigen vei 20, 4817 His, Norway"}]},{"given":"M","family":"V\u00e1zquez Alonso","sequence":"additional","affiliation":[{"name":"Institute of Marine Research (IMR), Nye Fl\u00f8devigen vei 20, 4817 His, Norway"}]},{"given":"H","family":"Steen","sequence":"additional","affiliation":[{"name":"Institute of Marine Research (IMR), Nye Fl\u00f8devigen vei 20, 4817 His, Norway"}]}],"member":"1913","reference":[{"key":"Ref1","doi-asserted-by":"publisher","DOI":"10.1111\/jfb.12731"},{"key":"Ref2","unstructured":"Aasen NJ (2019) The movement of five wrasse species (Labridae) on the Norwegian west coast. 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