| Autor: |
Qiu Z; 1 Centre for Marine Bio-Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales , Sydney, New South Wales 2052 , Australia., Coleman MA; 2 Department of Primary Industries, NSW Fisheries , PO Box 4321, Coffs Harbour, New South Wales 2450 , Australia., Provost E; 3 National Marine Science Centre, Southern Cross University , Coffs Harbour, New South Wales 2450 , Australia., Campbell AH; 1 Centre for Marine Bio-Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales , Sydney, New South Wales 2052 , Australia.; 4 GeneCology Research Centre , University of the Sunshine Coast, Queensland 4556 , Australia., Kelaher BP; 3 National Marine Science Centre, Southern Cross University , Coffs Harbour, New South Wales 2450 , Australia., Dalton SJ; 3 National Marine Science Centre, Southern Cross University , Coffs Harbour, New South Wales 2450 , Australia.; 5 School of Biological Sciences , University of Queensland, St Lucia, Queensland 4072 , Australia., Thomas T; 1 Centre for Marine Bio-Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales , Sydney, New South Wales 2052 , Australia., Steinberg PD; 1 Centre for Marine Bio-Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales , Sydney, New South Wales 2052 , Australia.; 6 Sydney Institute of Marine Science , 19 Chowder Bay Road, Mosman, New South Wales 2088 , Australia.; 7 Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University , 60 Nanyang Drive, SBS-01N-27, Singapore 637551 , Republic of Singapore., Marzinelli EM; 1 Centre for Marine Bio-Innovation, School of Biological, Earth and Environmental Sciences, University of New South Wales , Sydney, New South Wales 2052 , Australia.; 6 Sydney Institute of Marine Science , 19 Chowder Bay Road, Mosman, New South Wales 2088 , Australia.; 7 Singapore Centre for Environmental Life Sciences Engineering, Nanyang Technological University , 60 Nanyang Drive, SBS-01N-27, Singapore 637551 , Republic of Singapore.; 8 School of Life and Environmental Sciences, Coastal and Marine Ecosystems, University of Sydney , Sydney, New South Wales 2006 , Australia. |
| Abstrakt: |
Climate change is driving global declines of marine habitat-forming species through physiological effects and through changes to ecological interactions, with projected trajectories for ocean warming and acidification likely to exacerbate such impacts in coming decades. Interactions between habitat-formers and their microbiomes are fundamental for host functioning and resilience, but how such relationships will change in future conditions is largely unknown. We investigated independent and interactive effects of warming and acidification on a large brown seaweed, the kelp Ecklonia radiata, and its associated microbiome in experimental mesocosms. Microbial communities were affected by warming and, during the first week, by acidification. During the second week, kelp developed disease-like symptoms previously observed in the field. The tissue of some kelp blistered, bleached and eventually degraded, particularly under the acidification treatments, affecting photosynthetic efficiency. Microbial communities differed between blistered and healthy kelp for all treatments, except for those under future conditions of warming and acidification, which after two weeks resembled assemblages associated with healthy hosts. This indicates that changes in the microbiome were not easily predictable as the severity of future climate scenarios increased. Future ocean conditions can change kelp microbiomes and may lead to host disease, with potentially cascading impacts on associated ecosystems. |
