Large-scale salmon farming in Norway impacts the epiphytic community of Laminaria hyperborea
| Autor: | Trine Bekkby, Barbro Taraldset Haugland, Morten D. Skogen, Camille A. White, Stein Fredriksen, Marcos Antonio Carvajalino-Fernandez, Raymond Bannister, Vivian Husa, Tina Kutti, Kjell Magnus Norderhaug, Caroline Susanne Armitage |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Biomass (ecology) biology Ecology Hyperborea 010604 marine biology & hydrobiology Kelp SH1-691 Management Monitoring Policy and Law Aquatic Science biology.organism_classification 010603 evolutionary biology 01 natural sciences Kelp forest Spatial heterogeneity Laminaria hyperborea Algae Aquaculture. Fisheries. Angling Epiphyte QH540-549.5 Water Science and Technology |
| Zdroj: | Aquaculture Environment Interactions Aquaculture Environment Interactions, Vol 13, Pp 81-100 (2021) |
| ISSN: | 1869-215X |
| Popis: | Large-scale finfish farms are increasingly located in dispersive hard-bottom environments whereLaminaria hyperboreaforests dominate; however, the interactions between farm effluents and kelp forests are poorly understood. Effects of 2 levels of salmonid fish-farming effluents (high and low) onL. hyperboreaepiphytic communities were studied by sampling canopy plants from 12 sites in 2 high-energy dispersive environments. Specifically, we assessed if farm effluents stimulated fast-growing epiphytic algae and faunal species onL. hyperboreastipes—as this can impact the kelp forest community composition—and/or an increased lamina epiphytic growth, which could negatively impact the kelp itself. We found that bryozoan biomass on the stipes was significantly higher at high-effluent farm sites compared to low-effluent farm and reference sites, resulting in a significantly different epiphytic community. Macroalgal biomass also increased with increasing effluent levels, including opportunisticEctocarpusspp., resulting in a less heterogeneous macroalgae community at high-effluent farm sites. This habitat heterogeneity was further reduced by the high bryozoan biomass at the high-effluent sites. Such changes in the epiphyte community could have implications for the faunal community that relies on the epiphytes for food and refuge. On the kelp lamina, no clear response to farm effluents was found. |
| Databáze: | OpenAIRE |
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