FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2064564136> ?p ?o ?g. }

• W2064564136 endingPage "361" @default.
• W2064564136 startingPage "359" @default.
• W2064564136 abstract "Although some organisms exercise considerable control over their biomineralization, seawater chemistry has affected skeletal secretion by many taxa. Secular changes in the magnesium / calcium ratio and absolute concentration of calcium in seawater, driven by changes in rates of deep-sea igneous activity, have influenced the precipitation of nonskeletal carbonates: low-Mg calcite forms when the ambient Mg / Ca molar ratio is < 1, high-Mg calcite forms when the ratio is 1–2, and high-Mg calcite and aragonite form when the ratio is above 2. Reef builders and other simple organisms that are highly productive biomineralizers have tended to respond to changes in seawater chemistry in ways that mirror patterns for nonskelatal carbonates. Also, changes in the concentration of silicic acid in seawater have affected the ability of organisms to secrete siliceous skeletons. In laboratory experiments, organisms that secrete high-Mg calcite in the modern aragonite sea incorporate progressively less Mg in their skeletons with a reduction in the ambient Mg / Ca ratio, producing low-Mg calcite in “Cretaceous” seawater (Mg / Ca molar ratio = 1.0). Because algae that liberate CO2 through calcification use it in their photosynthesis, an increase in the ambient Mg / Ca ratio results in accelerated aragonite secretion and overall growth for codiacean algae, and a decrease in the Mg / Ca ratio results in greatly accelerated growth rates for calcitic coccolithophores. Controlled experiments show that the increased concentration of Ca that accompanies a reduction of the ambient Mg / Ca ratio also accelerates coccolithophore population growth. Coccolithophores' production of vast chalk deposits in Late Cretaceous time can be attributed to the low Mg / Ca ratio and high Ca concentration in ambient seawater. The high Mg / Ca ratio and low Ca concentration in modern seawater apparently limit population growth for the large majority of modern coccolithophore species: ones that fail to respond to nitrate, phosphate or iron fertilization and are confined to oligotrophic waters. Presumably the low Mg / Ca ratio of ambient seawater was at least partly responsible for reduced reef-building by scleractinian corals in Late Cretaceous time. Some taxa have secreted more robust skeletons when seawater chemistry has favored their skeletal mineralogy. Strong intrinsic control of biomineralization can buffer a taxon against secular changes in seawater chemistry. Mollusks, for example, evolved the ability to severely limit the incorporation of Mg in their skeletal calcite in seawaters with Mg / Ca ratios as high as that of the present, but not in seawaters with still higher ratios. The ability to exclude Mg is useful because Mg reduces the rate of step growth of calcite crystals. On the other hand, labile skeletal mineralogy has permitted some taxa to respond to secular changes in the Mg / Ca ratio of seawater via phenotypic or evolutionary shifts of skeletal mineralogy. Sponges and bryozoans have apparently undergone evolutionary shifts of this kind polyphyletically. Increased incorporation of Mg in skeletal calcite with secular increases in the concentration of Mg in seawater has had little effect on seawater chemistry. In contrast, removal of Si by diatoms beginning in late Mesozoic time lowered the concentration of silicic acid in seawater, forcing siliceous sponges to secrete less robust skeletons." @default.
• W2064564136 created "2016-06-24" @default.
• W2064564136 creator A5030901279 @default.
• W2064564136 date "2001-04-01" @default.
• W2064564136 modified "2023-09-27" @default.
• W2064564136 title "Secular variation in Phanerozoic marine biocalcification and the original mineralogy and mode of calcification of receptaculitids: a discussion" @default.
• W2064564136 cites W2033529887 @default.
• W2064564136 cites W2126707516 @default.
• W2064564136 cites W2147427800 @default.
• W2064564136 cites W2149068366 @default.
• W2064564136 cites W2644132672 @default.
• W2064564136 cites W2183907207 @default.
• W2064564136 doi "https://doi.org/10.1016/s0031-0182(01)00206-1" @default.
• W2064564136 hasPublicationYear "2001" @default.
• W2064564136 type Work @default.
• W2064564136 sameAs 2064564136 @default.
• W2064564136 citedByCount "3" @default.
• W2064564136 crossrefType "journal-article" @default.
• W2064564136 hasAuthorship W2064564136A5030901279 @default.
• W2064564136 hasConcept C107872376 @default.
• W2064564136 hasConcept C111368507 @default.
• W2064564136 hasConcept C127313418 @default.
• W2064564136 hasConcept C151730666 @default.
• W2064564136 hasConcept C183586093 @default.
• W2064564136 hasConcept C185592680 @default.
• W2064564136 hasConcept C197248824 @default.
• W2064564136 hasConcept C19829342 @default.
• W2064564136 hasConcept C199289684 @default.
• W2064564136 hasConcept C2779866092 @default.
• W2064564136 hasConcept C2780191791 @default.
• W2064564136 hasConcept C559758991 @default.
• W2064564136 hasConcept C59822182 @default.
• W2064564136 hasConcept C86803240 @default.
• W2064564136 hasConceptScore W2064564136C107872376 @default.
• W2064564136 hasConceptScore W2064564136C111368507 @default.
• W2064564136 hasConceptScore W2064564136C127313418 @default.
• W2064564136 hasConceptScore W2064564136C151730666 @default.
• W2064564136 hasConceptScore W2064564136C183586093 @default.
• W2064564136 hasConceptScore W2064564136C185592680 @default.
• W2064564136 hasConceptScore W2064564136C197248824 @default.
• W2064564136 hasConceptScore W2064564136C19829342 @default.
• W2064564136 hasConceptScore W2064564136C199289684 @default.
• W2064564136 hasConceptScore W2064564136C2779866092 @default.
• W2064564136 hasConceptScore W2064564136C2780191791 @default.
• W2064564136 hasConceptScore W2064564136C559758991 @default.
• W2064564136 hasConceptScore W2064564136C59822182 @default.
• W2064564136 hasConceptScore W2064564136C86803240 @default.
• W2064564136 hasIssue "3-4" @default.
• W2064564136 hasLocation W20645641361 @default.
• W2064564136 hasOpenAccess W2064564136 @default.
• W2064564136 hasPrimaryLocation W20645641361 @default.
• W2064564136 hasRelatedWork W188166098 @default.
• W2064564136 hasRelatedWork W2025558367 @default.
• W2064564136 hasRelatedWork W2041396612 @default.
• W2064564136 hasRelatedWork W2059097202 @default.
• W2064564136 hasRelatedWork W2097428382 @default.
• W2064564136 hasRelatedWork W2098073093 @default.
• W2064564136 hasRelatedWork W2114577634 @default.
• W2064564136 hasRelatedWork W2115777639 @default.
• W2064564136 hasRelatedWork W2116484408 @default.
• W2064564136 hasRelatedWork W328324522 @default.
• W2064564136 hasVolume "168" @default.
• W2064564136 isParatext "false" @default.
• W2064564136 isRetracted "false" @default.
• W2064564136 magId "2064564136" @default.
• W2064564136 workType "article" @default.