Carbon isotopic disequilibrium in the shell of the freshwater mussel Elliptio complanata

被引：17

作者：

Veinott, GI ^{[1
]}

Cornett, RJ

机构：

[1] Trent Univ, Watershed Ecosyst Grad Program, Peterborough, ON K9J 7B8, Canada

[2] AECL Res, Chalk River Labs, Environm Res Branch, Chalk River, ON K0J 1J0, Canada

来源：

APPLIED GEOCHEMISTRY | 1998年 / 13卷 / 01期

关键词：

D O I：

10.1016/S0883-2927(97)00053-X

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Isotopic analyses of shell material from the freshwater mussel Elliptio complanata produced mean C concentrations that were depleted in C-14 and C-13 relative to the lake water DIG. Depleted C isotope values were attributed to the incorporation of C-12-enriched metabolic C into the shell. Microsampling of longitudinal sections of shell revealed a seasonal pattern in the delta(13)C values. The seasonal pattern matched predictions that DIC delta(13)C and metabolic rate determine the final shell delta(13)C concentration. The greatest depletion of delta(13)C occurred in the summer. Similar delta(13)C patterns in marine and freshwater mollusks probably record not only temperature fluctuations, upwelling events, and phytoplankton blooms as reported, but also the changes in metabolic activity brought on by such events. (C) 1988 Elsevier Science Ltd. All rights reserved.

引用

页码：49 / 57

页数：9

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