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Coral macrobioerosion is accelerated by ocean acidification and nutrients

2014; Geological Society of America; Volume: 43; Issue: 1 Linguagem: Inglês

10.1130/g36147.1

1943-2682

Thomas M. DeCarlo, Anne L. Cohen, Hannah C. Barkley, Quinn Cobban, Charles W. Young, Kathryn E. F. Shamberger, Russell E. Brainard, Yimnang Golbuu,

Marine and coastal plant biology

Research Article| January 01, 2015 Coral macrobioerosion is accelerated by ocean acidification and nutrients Thomas M. DeCarlo; Thomas M. DeCarlo * 1Massachusetts Institute of Technology–Woods Hole Oceanographic Institution Joint Program in Oceanography/Applied Ocean Physics and Engineering, and Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA *E-mails: tdecarlo@whoi.edu; acohen@whoi.edu. Search for other works by this author on: GSW Google Scholar Anne L. Cohen; Anne L. Cohen * 2Woods Hole Oceanographic Institution, 266 Woods Hole Road, Woods Hole, Massachusetts 02543, USA *E-mails: tdecarlo@whoi.edu; acohen@whoi.edu. Search for other works by this author on: GSW Google Scholar Hannah C. Barkley; Hannah C. Barkley 1Massachusetts Institute of Technology–Woods Hole Oceanographic Institution Joint Program in Oceanography/Applied Ocean Physics and Engineering, and Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA Search for other works by this author on: GSW Google Scholar Quinn Cobban; Quinn Cobban 3Falmouth Academy, 7 Highfield Drive, Falmouth, Massachusetts 02540, USA Search for other works by this author on: GSW Google Scholar Charles Young; Charles Young 4National Oceanic and Atmospheric Administration, Pacific Islands Fisheries Science Center, Coral Reef Ecosystem Division (NOAA CRED), 1125B Ala Moana Boulevard, Honolulu, Hawaii 96814, USA Search for other works by this author on: GSW Google Scholar Kathryn E. Shamberger; Kathryn E. Shamberger 2Woods Hole Oceanographic Institution, 266 Woods Hole Road, Woods Hole, Massachusetts 02543, USA †Current address: Texas A&M University, College Station, Texas 77843, USA. Search for other works by this author on: GSW Google Scholar Russell E. Brainard; Russell E. Brainard 4National Oceanic and Atmospheric Administration, Pacific Islands Fisheries Science Center, Coral Reef Ecosystem Division (NOAA CRED), 1125B Ala Moana Boulevard, Honolulu, Hawaii 96814, USA Search for other works by this author on: GSW Google Scholar Yimnang Golbuu Yimnang Golbuu 5Palau International Coral Reef Center, Koror 96940, Palau Search for other works by this author on: GSW Google Scholar Author and Article Information Thomas M. DeCarlo * 1Massachusetts Institute of Technology–Woods Hole Oceanographic Institution Joint Program in Oceanography/Applied Ocean Physics and Engineering, and Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA Anne L. Cohen * 2Woods Hole Oceanographic Institution, 266 Woods Hole Road, Woods Hole, Massachusetts 02543, USA Hannah C. Barkley 1Massachusetts Institute of Technology–Woods Hole Oceanographic Institution Joint Program in Oceanography/Applied Ocean Physics and Engineering, and Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543, USA Quinn Cobban 3Falmouth Academy, 7 Highfield Drive, Falmouth, Massachusetts 02540, USA Charles Young 4National Oceanic and Atmospheric Administration, Pacific Islands Fisheries Science Center, Coral Reef Ecosystem Division (NOAA CRED), 1125B Ala Moana Boulevard, Honolulu, Hawaii 96814, USA Kathryn E. Shamberger †Current address: Texas A&M University, College Station, Texas 77843, USA. 2Woods Hole Oceanographic Institution, 266 Woods Hole Road, Woods Hole, Massachusetts 02543, USA Russell E. Brainard 4National Oceanic and Atmospheric Administration, Pacific Islands Fisheries Science Center, Coral Reef Ecosystem Division (NOAA CRED), 1125B Ala Moana Boulevard, Honolulu, Hawaii 96814, USA Yimnang Golbuu 5Palau International Coral Reef Center, Koror 96940, Palau *E-mails: tdecarlo@whoi.edu; acohen@whoi.edu. Publisher: Geological Society of America Received: 04 Aug 2014 Revision Received: 04 Oct 2014 Accepted: 08 Oct 2014 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2014 Geological Society of America Geology (2015) 43 (1): 7–10. https://doi.org/10.1130/G36147.1 Article history Received: 04 Aug 2014 Revision Received: 04 Oct 2014 Accepted: 08 Oct 2014 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Thomas M. DeCarlo, Anne L. Cohen, Hannah C. Barkley, Quinn Cobban, Charles Young, Kathryn E. Shamberger, Russell E. Brainard, Yimnang Golbuu; Coral macrobioerosion is accelerated by ocean acidification and nutrients. Geology 2015;; 43 (1): 7–10. doi: https://doi.org/10.1130/G36147.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Coral reefs exist in a delicate balance between calcium carbonate (CaCO3) production and CaCO3 loss. Ocean acidification (OA), the CO2-driven decline in seawater pH and CaCO3 saturation state (Ω), threatens to tip this balance by decreasing calcification and increasing erosion and dissolution. While multiple CO2 manipulation experiments show coral calcification declines under OA, the sensitivity of bioerosion to OA is less well understood. Previous work suggests that coral and coral-reef bioerosion increase with decreasing seawater Ω. However, in the surface ocean, Ω and nutrient concentrations often covary, making their relative influence difficult to resolve. Here, we exploit unique natural gradients in Ω and nutrients across the Pacific basin to quantify the impact of these factors, together and independently, on macrobioerosion rates of coral skeletons. Using an automated program to quantify macrobioerosion in three-dimensional computerized tomography (CT) scans of coral cores, we show that macrobioerosion rates of live Porites colonies in both low-nutrient (oligotrophic) and high-nutrient (>1 µM nitrate) waters increase significantly as Ω decreases. However, the sensitivity of macrobioerosion to Ω is ten times greater under high-nutrient conditions. Our results demonstrate that OA (decreased Ω) alone can increase coral macrobioerosion rates, but the interaction of OA with local stressors exacerbates its impact, accelerating a shift toward net CaCO3 removal from coral reefs. 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