title: Acclimation of bloom-forming and perennial seaweeds to elevated pCO2conserved across levels of environmental complexity.
abstract: Macroalgae contribute approximately 15% of the primary productivity in coastal marine ecosystems, fix up to 27.4 Tg of carbon per year, and provide important structural components for life in coastal waters. Despite this ecological and commercial importance, direct measurements and comparisons of the short-term responses to elevated pCO2in seaweeds with different life-history strategies are scarce. Here, we cultured several seaweed species (bloom forming/nonbloom forming/perennial/annual) in the laboratory, in tanks in an indoor mesocosm facility, and in coastal mesocosms under pCO2levels ranging from 400 to 2,000 μatm. We find that, across all scales of the experimental setup, ephemeral species of the genus Ulva increase their photosynthesis and growth rates in response to elevated pCO2the most, whereas longer-lived perennial species show a smaller increase or a decrease. These differences in short-term growth and photosynthesis rates are likely to give bloom-forming green seaweeds a competitive advantage in mixed communities, and our results thus suggest that coastal seaweed assemblages in eutrophic waters may undergo an initial shift toward communities dominated by bloom-forming, short-lived seaweeds.
authors.affiliation: Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.|Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Xu
authors.affiliation: Biosciences, Environment and Sustainability Institute, University of Exeter, Penryn, UK.
authors.forename: Charlotte-Elisa
authors.initials: CE
authors.lastname: Schaum
authors.affiliation: Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.
authors.forename: Fan
authors.initials: F
authors.lastname: Lin
authors.affiliation: First Institute of Oceanography, State Oceanic Administration, Qingdao, China.|Laboratory for Regional Oceanography and Numerical Modeling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
authors.forename: Ke
authors.initials: K
authors.lastname: Sun
authors.affiliation: Department of Physics and Physical Oceanography, Memorial University of Newfoundland, St. John's, NL, Canada.
authors.forename: James R
authors.identifier: 0000-0001-9098-6309
authors.initials: JR
authors.lastname: Munroe
authors.affiliation: Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.
authors.forename: Xiao W
authors.initials: XW
authors.lastname: Zhang
authors.affiliation: Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.
authors.forename: Xiao
authors.initials: X
authors.lastname: Fan
authors.affiliation: Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.
authors.forename: Lin H
authors.initials: LH
authors.lastname: Teng
authors.affiliation: Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.
authors.forename: Yi T
authors.initials: YT
authors.lastname: Wang
authors.affiliation: Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.
authors.forename: Zhi M
authors.initials: ZM
authors.lastname: Zhuang
authors.affiliation: Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, China.|Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China.
authors.forename: Naihao
authors.identifier: 0000-0002-8294-1044
authors.initials: N
authors.lastname: Ye
mesh_terms: D000064:Acclimatization; D002245:Carbon Dioxide / Q000378:metabolism*; D005068:Eutrophication; D000071421:Life History Traits; D010788:Photosynthesis; D012624:Seaweed / Q000254:growth & development / Q000502:physiology*
chemical_list: D002245:Carbon Dioxide
keywords: 
  CO
  2
  ; acclimation; environmental complexity; growth; photosynthesis; respiration; seaweed