气候变化领域集成服务门户(CCPortal): From particle attachment to space-filling coral skeletons

CCPortal

DOI	10.1073/pnas.2012025117
	From particle attachment to space-filling coral skeletons
	Sun C.-Y.; Stifler C.A.; Chopdekar R.V.; Schmidt C.A.; Parida G.; Schoeppler V.; Fordyce B.I.; Brau J.H.; Mass T.; Tambutté S.; Gilbert P.U.P.A.
发表日期	2020
ISSN	0027-8424
起始页码	30159
结束页码	30170
卷号	117 期号:48
英文摘要	Reef-building corals and their aragonite (CaCO3) skeletons support entire reef ecosystems, yet their formation mechanism is poorly understood. Here we used synchrotron spectromicroscopy to observe the nanoscale mineralogy of fresh, forming skeletons from six species spanning all reef-forming coral morphologies: Branching, encrusting, massive, and table. In all species, hydrated and anhydrous amorphous calcium carbonate nanoparticles were precursors for skeletal growth, as previously observed in a single species. The amorphous precursors here were observed in tissue, between tissue and skeleton, and at growth fronts of the skeleton, within a low-density nano- or microporous layer varying in thickness from 7 to 20 μm. Brunauer-Emmett-Teller measurements, however, indicated that the mature skeletons at the microscale were space-filling, comparable to single crystals of geologic aragonite. Nanoparticles alone can never fill space completely, thus ion-by-ion filling must be invoked to fill interstitial pores. Such ion-by-ion diffusion and attachment may occur from the supersaturated calcifying fluid known to exist in corals, or from a dense liquid precursor, observed in synthetic systems but never in biogenic ones. Concomitant particle attachment and ion-by-ion filling was previously observed in synthetic calcite rhombohedra, but never in aragonite pseudohexagonal prisms, synthetic or biogenic, as observed here. Models for biomineral growth, isotope incorporation, and coral skeletons’ resilience to ocean warming and acidification must take into account the dual formation mechanism, including particle attachment and ion-by-ion space filling. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Coral skeleton formation \| PEEM \| spectromicroscopy \| biomineral \| aragonite
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160703
作者单位	Sun, C.-Y., Department of Physics, University of Wisconsin, Madison, WI 53706, United States; Stifler, C.A., Department of Physics, University of Wisconsin, Madison, WI 53706, United States; Chopdekar, R.V., Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, United States; Schmidt, C.A., Department of Physics, University of Wisconsin, Madison, WI 53706, United States; Parida, G., Department of Physics, University of Wisconsin, Madison, WI 53706, United States; Schoeppler, V., B CUBE–Center for Molecular Bioengineering, Technische Universität Dresden, Dresden, 01307, Germany; Fordyce, B.I., Department of Physics, University of Wisconsin, Madison, WI 53706, United States; Brau, J.H., Department of Physics, University of Wisconsin, Madison, WI 53706, United States; Mass, T., Marine Biology Department, University of Haifa, Haifa, 31905, Israel; Tambutté, S., Marine Biology Department, Centre Scientifique de Monaco98000, Monaco; Gilbert, P.U.P.A., Department of Physics, Un...
推荐引用方式 GB/T 7714	Sun C.-Y.,Stifler C.A.,Chopdekar R.V.,et al. From particle attachment to space-filling coral skeletons[J],2020,117(48).
APA	Sun C.-Y..,Stifler C.A..,Chopdekar R.V..,Schmidt C.A..,Parida G..,...&Gilbert P.U.P.A..(2020).From particle attachment to space-filling coral skeletons.Proceedings of the National Academy of Sciences of the United States of America,117(48).
MLA	Sun C.-Y.,et al."From particle attachment to space-filling coral skeletons".Proceedings of the National Academy of Sciences of the United States of America 117.48(2020).