DOI: 10.1111/gcb.12035
论文题名: Decline in growth of foraminifer Marginopora rossi under eutrophication and ocean acidification scenarios
作者: Reymond C.E. ; Lloyd A. ; Kline D.I. ; Dove S.G. ; Pandolfi J.M.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 1 起始页码: 291
结束页码: 302
语种: 英语
英文关键词: Biomineralization
; Eutrophication
; Foraminiferal physiology
; High-Mg calcite
; Ocean acidification
Scopus关键词: acid
; chlorophyll
; oxygen
; acidification
; benthic foraminifera
; biomineralization
; calcification
; calcite
; calcium carbonate
; carbon dioxide
; coral reef
; dissolution
; dissolved inorganic nitrogen
; dissolved inorganic phosphorus
; eutrophication
; global warming
; growth rate
; land use change
; pH
; physiology
; precipitation (chemistry)
; respiration
; symbiont
; animal
; article
; chemistry
; coral reef
; eutrophication
; photosynthesis
; sea
; symbiosis
; Acids
; Animals
; Chlorophyll
; Coral Reefs
; Eutrophication
; Oceans and Seas
; Oxygen
; Photosynthesis
; Symbiosis
; Anthozoa
; Foraminifera
; Marginopora
英文摘要: The combination of global and local stressors is leading to a decline in coral reef health globally. In the case of eutrophication, increased concentrations of dissolved inorganic nitrogen (DIN) and phosphorus (DIP) are largely attributed to local land use changes. From the global perspective, increased atmospheric CO2 levels are not only contributing to global warming but also ocean acidification (OA). Both eutrophication and OA have serious implications for calcium carbonate production and dissolution among calcifying organisms. In particular, benthic foraminifera precipitate the most soluble form of mineral calcium carbonate (high-Mg calcite), potentially making them more sensitive to dissolution. In this study, a manipulative orthogonal two-factor experiment was conducted to test the effects of dissolved inorganic nutrients and OA on the growth, respiration and photophysiology of the large photosymbiont-bearing benthic foraminifer, Marginopora rossi. This study found the growth rate of M. rossi was inhibited by the interaction of eutrophication and acidification. The relationship between M. rossi and its photosymbionts became destabilized due to the photosymbiont's release from nutrient limitation in the nitrate-enriched treatment, as shown by an increase in zooxanthellae cells per host surface area. Foraminifers from the OA treatments had an increased amount of Chl a per cell, suggesting a greater potential to harvest light energy, however, there was no net benefit to the foraminifer growth. Overall, this study demonstrates that the impacts of OA and eutrophication are dose dependent and interactive. This research indicates an OA threshold at pH 7.6, alone or in combination with eutrophication, will lead to a decline in M. rossi calcification. The decline in foraminifera calcification associated with pollution and OA will have broad ecological implications across their ubiquitous range and suggests that without mitigation it could have serious implications for the future of coral reefs. © 2012 Blackwell Publishing Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62575
Appears in Collections: 影响、适应和脆弱性
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作者单位: Australian Research Council Centre of Excellence for Coral Reef Studies, School of Biological Sciences, University of Queensland, Brisbane 4072, Australia; Global Change Institute, University of Queensland, Brisbane, 4072, Australia
Recommended Citation:
Reymond C.E.,Lloyd A.,Kline D.I.,et al. Decline in growth of foraminifer Marginopora rossi under eutrophication and ocean acidification scenarios[J]. Global Change Biology,2013-01-01,19(1)