Life Sciences & Biomedicine - Other Topics
; Environmental Sciences & Ecology
; Evolutionary Biology
英文摘要:
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.
1.Univ New South Wales, Ctr Marine Bioinnovat, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia 2.NSW Fisheries, Dept Primary Ind, POB 4321, Coffs Harbour, NSW 2450, Australia 3.Southern Cross Univ, Natl Marine Sci Ctr, Coffs Harbour, NSW 2450, Australia 4.Univ Sunshine Coast, GeneCol Res Ctr, Sippy Downs, Qld 4556, Australia 5.Univ Queensland, Sch Biol Sci, St Lucia, Qld 4072, Australia 6.Sydney Inst Marine Sci, 19 Chowder Bay Rd, Mosman, NSW 2088, Australia 7.Nanyang Technol Univ, Singapore Ctr Environm Life Sci Engn, 60 Nanyang Dr,SBS-01N-27, Singapore 637551, Singapore 8.Univ Sydney, Sch Life & Environm Sci, Coastal & Marine Ecosyst, Sydney, NSW 2006, Australia
Recommended Citation:
Qiu, Zhiguang,Coleman, Melinda A.,Provost, Euan,et al. Future climate change is predicted to affect the microbiome and condition of habitat-forming kelp[J]. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES,2019-01-01,286(1896)