Gutenberg Open Science: Shell microstructures (disturbance lines) of Arctica islandica (Bivalvia) : a potential proxy for severe oxygen depletion

Please use this identifier to cite or link to this item: http://doi.org/10.25358/openscience-9748

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DC Field	Value	Language
dc.contributor.author	Höche, Nils	-
dc.contributor.author	Zettler, Michael L.	-
dc.contributor.author	Huang, Xizhi	-
dc.contributor.author	Schöne, Bernd R.	-
dc.date.accessioned	2023-12-05T10:34:50Z	-
dc.date.available	2023-12-05T10:34:50Z	-
dc.date.issued	2023	-
dc.identifier.uri	https://openscience.ub.uni-mainz.de/handle/20.500.12030/9766	-
dc.description.abstract	The spread of oxygen deficiency in nearshore coastal habitats endangers benthic communities. To better understand the mechanisms leading to oxygen depletion and eventually hypoxia, predict the future development of affected ecosystems, and define suitable mitigation strategies requires detailed knowledge of the dissolved oxygen (DO) history. Suitable high-resolution DO archives covering coherent time intervals of decades to centuries include bivalve shells. Here, we explored if the microstructure, specifically disturbance lines, in shells of Arctica islandica from the Baltic Sea can be used as an alternative or complementary proxy to Mn/Cashell to track the frequency and severity of past low-DO events. Disturbance lines differ from periodic annual growth lines by the presence of fine complex crossed lamellae instead of irregular simple prisms. Aside from a qualitative assessment of microstructural changes, the morphology of individual biomineral units (BMUs) was quantitatively determined by artificial intelligence-assisted image analysis to derive models for DO reconstruction. As demonstrated, Mn-rich disturbance lines can provide a proxy for past deoxygenation events (i.e., DO < 45 μmol/L), but it currently remains unresolved if low DO leads to microstructurally distinct features that differ from those caused by other environmental stressors. At least in studied specimens from the Baltic Sea and Iceland, low temperature, salinity near the lower physiological tolerance, or food scarcity did not result in disturbance lines. With decreasing DO supply, disturbance lines seem to become more prominent, contain more Mn, and consist of increasingly smaller and more elongated BMUs with a larger perimeter-to-area ratio. Although the relationship between DO and BMU size or elongation was statistically significant, the explained variability (<1.5%) was too small and the error too large to reconstruct DO values. BMU parameters may reveal a closer relationship with DO if studied in three dimensions and if the DO content was determined at high resolution, directly at the position where the bivalves lived, something that future work should address.	en_GB
dc.language.iso	eng	de
dc.rights	CC BY	*
dc.rights.uri	https://creativecommons.org/licenses/by/4.0/	*
dc.subject.ddc	500 Naturwissenschaften	de_DE
dc.subject.ddc	500 Natural sciences and mathematics	en_GB
dc.subject.ddc	550 Geowissenschaften	de_DE
dc.subject.ddc	550 Earth sciences	en_GB
dc.subject.ddc	560 Paläontologie	de_DE
dc.subject.ddc	560 Paleontology	en_GB
dc.title	Shell microstructures (disturbance lines) of Arctica islandica (Bivalvia) : a potential proxy for severe oxygen depletion	en_GB
dc.type	Zeitschriftenaufsatz	de
dc.identifier.doi	http://doi.org/10.25358/openscience-9748	-
jgu.type.contenttype	Scientific article	de
jgu.type.dinitype	article	en_GB
jgu.type.version	Published version	de
jgu.type.resource	Text	de
jgu.organisation.department	FB 09 Chemie, Pharmazie u. Geowissensch.	de
jgu.organisation.number	7950	-
jgu.organisation.name	Johannes Gutenberg-Universität Mainz	-
jgu.rights.accessrights	openAccess	-
jgu.journal.title	Frontiers in Marine Science	de
jgu.journal.volume	10	de
jgu.pages.alternative	1219716	de
jgu.publisher.year	2023	-
jgu.publisher.name	Frontiers Media	de
jgu.publisher.place	Lausanne	de
jgu.publisher.issn	2296-7745	de
jgu.organisation.place	Mainz	-
jgu.subject.ddccode	500	de
jgu.subject.ddccode	550	de
jgu.subject.ddccode	560	de
jgu.publisher.doi	10.3389/fmars.2023.1219716	de
jgu.organisation.ror	https://ror.org/023b0x485	-
jgu.subject.dfg	Naturwissenschaften	de
Appears in collections:	DFG-491381577-G

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