DOI: 10.1111/gcb.12369
论文题名: Effects of ocean warming and acidification on the energy budget of an excavating sponge
作者: Fang J.K.H. ; Schönberg C.H.L. ; Mello-Athayde M.A. ; Hoegh-Guldberg O. ; Dove S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2014
卷: 20, 期: 4 起始页码: 1043
结束页码: 1054
语种: 英语
英文关键词: Acidification
; Bioerosion
; Carbon balance
; CHAR
; Corals
; CZAR
; Sponges
; Temperature
Scopus关键词: acidification
; autotrophy
; bioerosion
; carbon balance
; coral reef
; dinoflagellate
; energy budget
; sponge
; symbiont
; symbiosis
; warming
; Anthozoa
; Cliona orientalis
; Dinophyceae
; Porifera
; Symbiodinium
; carbon
; carbon dioxide
; sea water
; animal
; biological model
; biomass
; chemistry
; coral reef
; energy metabolism
; metabolism
; mitosis index
; photosynthesis
; physiology
; sea
; sponge (Porifera)
; symbiosis
; temperature
; Animals
; Biomass
; Carbon
; Carbon Dioxide
; Coral Reefs
; Energy Metabolism
; Mitotic Index
; Models, Biological
; Oceans and Seas
; Photosynthesis
; Porifera
; Seawater
; Symbiosis
; Temperature
英文摘要: Recent research efforts have demonstrated increased bioerosion rates under experimentally elevated partial pressures of seawater carbon dioxide (pCO2) with or without increased temperatures, which may lead to net erosion on coral reefs in the future. However, this conclusion clearly depends on the ability of the investigated bioeroding organisms to survive and grow in the warmer and more acidic future environments, which remains unexplored. The excavating sponge Cliona orientalis Thiele, is a widely distributed bioeroding organism and symbiotic with dinoflagellates of the genus Symbiodinium. Using C. orientalis, an energy budget model was developed to calculate amounts of carbon directed into metabolic maintenance and growth. This model was tested under a range of CO2 emission scenarios (temperature + pCO2) appropriate to an Austral early summer. Under a pre-industrial scenario, present day (control) scenario, or B1 future scenario (associated with reducing the rate of CO2 emissions over the next few decades), C. orientalis maintained a positive energy budget, where metabolic demand was likely satisfied by autotrophic carbon provided by Symbiodinium and heterotrophic carbon via filter-feeding, suggesting sustainability. Under B1, C. orientalis likely benefited by a greater supply of photosynthetic products from its symbionts, which increased by up to 56% per unit area, and displayed an improved condition with up to 52% increased surplus carbon available for growth. Under an A1FI future scenario (associated with 'business-as-usual' CO2 emissions) bleached C. orientalis experienced the highest metabolic demand, but carbon acquired was insufficient to maintain the sponge, as indicated by a negative energy budget. These metabolic considerations suggest that previous observations of increased bioerosion under A1FI by C. orientalis may not last through the height of future A1FI summers, and survival of individual sponges may be dependent on the energy reserves (biomass) they have accumulated through the rest of the year. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61948
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Coral Reef Ecosystems Laboratory, School of Biological Sciences, The University of Queensland, St. Lucia, QLD, Australia; Australian Research Council Centre of Excellence for Coral Reef Studies, The University of Queensland, St. Lucia, QLD 4072, Australia; Australian Institute of Marine Science, Oceans Institute, The University of Western Australia, Crawley, WA 6009, Australia; Global Change Institute, The University of Queensland, St. Lucia, QLD 4072, Australia
Recommended Citation:
Fang J.K.H.,Schönberg C.H.L.,Mello-Athayde M.A.,et al. Effects of ocean warming and acidification on the energy budget of an excavating sponge[J]. Global Change Biology,2014-01-01,20(4)