SHELL GROWTH-RATES OF PTEROPOD AND HETEROPOD MOLLUSKS AND ARAGONITE PRODUCTION IN THE OPEN OCEAN - IMPLICATIONS FOR THE MARINE CARBONATE SYSTEM
SHELL GROWTH-RATES OF PTEROPOD AND HETEROPOD MOLLUSKS AND ARAGONITE PRODUCTION IN THE OPEN OCEAN - IMPLICATIONS FOR THE MARINE CARBONATE SYSTEM
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DOI：
10.1357/002224090784984614
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发表时间：
1990-02-01
影响因子：
0.5
通讯作者：
FABRY, VJ
中科院分区：
文献类型：
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作者：
FABRY, VJ
在短期~(45)Ca吸收实验中，测定了4种真生翼足类和2种有壳异足类的壳钙化速率。在北太平洋和大西洋的亚热带、温度和亚北极水域，动物由潜水员手工采集，使用潜水器捕获，并用浮游生物网捕获。翼足类的壳体生长速率为1.1~7.8微克钙沉积(镁钙壳)-1h-1。杂足类的生长速度在4.6到4.9微克钙沉积(镁钙壳)-1小时-1之间。用瞬时生长率法估算了赤道东太平洋、北太平洋中央水域和巴哈马大洋之舌等地有壳翼足类和杂足类的文石产量。在所有站点，翼足类的数量是杂足类的3到9倍，占文石产量的65%到96%。文石产量估计在2.1至6.9 mg CaCO3m-2d-1之间。使用基于海洋生产力的两个广泛划分的加权平均值，将结果与报道的用沉积物捕捉器测量的文石通量进行比较。数据表明，除了翼足类和杂足类文石的溶解外，还需要一种碱度来源来提供已公布的北太平洋水柱中CaCO3溶解的大部分。
Shell calcification rates of four species of euthecosomatous pteropods and two species of shelled heteropods were measured in short-term 45Ca uptake experiments. In subtropical, temperature, and subarctic waters of the North Pacific Ocean and Atlantic Ocean, animals were hand-collected by Scuba divers, captured with the use of a submersible and caught in plankton nets. Shell growth rates of pteropods ranged from 1.1 to 7.8 .mu.g Ca deposited (mg Ca shell)-1 h-1. Heteropod growth rates ranged from 4.6 to 4.9 .mu.g Ca deposited (mg Ca shell)-1 h-1. Aragonite production of shelled pteropods and heteropods at stations in the eastern Equatorial Pacific, North Pacific Central Water and the Tongue of the Ocean, Bahamas, was estimated using the instantaneous growth rate method. At all stations, pteropods were 3 to 9 times more abundant than heteropods and constituted 65 to 96% of aragonite production. Estimates of aragonite production ranged from 2.1 to 6.9 mg CaCO3 m-2 d-1. Using weighted averages based on two broad divisions of oceanic productivity, results were compared to reported aragonite fluxes measured with sediment traps. The data indicate that a source of alkalinity other than the dissolution of pteropod and heteropod aragonite is needed to supply the majority of a published estimate of CaCO3 dissolution in the water column of the North Pacific.