Aragonite Crystals within Codiacean Algae: Distinctive ... - Science
Morphologic studies of single crystals of aragonite within Codiacean algae reveal characteristic crystal forms produced by two distinctly different modes of calcification. Diagnostic serrated crystals (1 micrometer in length) of aragonite originating within the extracellular sheaths of capitular filaments are incorporated into modern lime ...
Direct contribution of the seagrass Thalassia testudinum to lime …
2014年5月22日 · A recent global characterization of modern carbonate mud deposits from reefs and carbonate platforms concluded that modern tropical muds are largely derived from the breakdown of skeletal grains...
Aragonitic Algae in Calcite Seas: Effect of Seawater Mg/Ca …
2006年3月1日 · Secular variation in seawater Mg/Ca would have subjected the aragonite-producing codiacean algae to two intervals of low-Mg calcite seas (m Mg/Ca < 2) and two intervals of aragonite + high-Mg calcite seas (m Mg/Ca > 2) …
Screening of Codiacean algae (Chlorophyta) of the Indian …
2001年11月30日 · Thirteen species of marine algae belonging to the family Codiaceae were selected from the Indian coast to study their sulphated polysaccharide (SPS) contents and their blood anticoagulant...
方解石海中的文石藻：海水镁/钙比对藻类沉积物产生的影响
2006年3月1日 · 为了验证这一说法，在整个 Codiaceae 的整个地质历史中发生在海洋中的 mMg/Ca 比率（1.0、2.5、5.2）配制的人造海水中，生长了产生沉积物的尾纲藻类 Udota flabellum 的标本。 而 U. flabellum 藻类只在人工边界海水中生产文石 (mMg/Ca = 2. 5) 和人造文石 + 高镁方解石海水（现代海水；mMg/Ca = 5.2），藻类产生了一部分（25±3%）的 CaCO3 作为低镁方解石（≤ 4 mol% MgCO3）人造方解石海水 (mMg/Ca = 1.0)，表明它们的 CaCO3 多晶型控制可以 …
Aragonite production in calcite seas: effect of seawater Mg/Ca …
2016年4月8日 · These studies have asserted that major sediment production by codiacean algae in Recent tropical seas is permitted by the Mg/Ca ratio of modern seawater (molar Mg/Ca ∼5.2) remaining within the aragonitic/high-Mg calcite nucleation field (molar Mg/Ca >2). Here I present the results of experiments conducted to determine the effects of ambient ...
[PDF] Aragonite production in calcite seas: effect of seawater …
2005年6月20日 · These studies have asserted that major sediment production by codiacean algae in Recent tropical seas is permitted by the Mg/Ca ratio of modern seawater (molar Mg/Ca ∼5.2) remaining within the aragonitic/high-Mg calcite nucleation field (molar Mg/Ca >2).
Chapter 5 Calcareous Green Algae (Chlorophyta) - ScienceDirect
1977年1月1日 · Calcareous green algae belong to the three groups: (1) Codiaceae, (2) Dasycladaceae, and (3) Charophyceae. The first two listed are families and inhabit exclusively marine environments, while charophytes are nonmarine and are considered a separate division (phylum. Marine green algae are primarily macroscopic plants with well-defined cell walls.
Aragonite production in calcite seas: effect of ... - GeoScienceWorld
2005年1月1日 · Here I present the results of experiments conducted to determine the effects of ambient Mg/Ca on the mineralogy, growth rate, primary productivity, calcification rate, and biomechanics of the codiacean alga Penicillus capitatus.
Aragonite Crystals within Codiacean Algae ... - Semantic Scholar
Morphologic studies of single crystals of aragonite within Codiacean algae reveal characteristic crystal forms produced by two distinctly different modes of calcification. Diagnostic serrated crystals (1 micrometer in length) of aragonite originating within the extracellular sheaths of capitular filaments are incorporated into modern lime ...
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