Ecological significance of benthic foraminifera:: 13C labelling experiments
Ecological significance of benthic foraminifera:: 13C labelling experiments
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DOI：
10.3354/meps202289
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发表时间：
2000-01-01
影响因子：
2.5
通讯作者：
Heip, CHR
中科院分区：
文献类型：
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作者：
Moodley, L;Boschker, HTS;Heip, CHR
我们研究了有孔虫吸收潮间带河口沉积物中新沉积的藻类碳的能力。在含有天然底栖生物群的完整沉积物岩心中添加了lyophylyzed c -13标记的无菌小球藻。整个系统的反应很快；大约5%的添加碳在6小时内被呼吸成二氧化碳。细菌在12小时内吸收了大约2%到4%的添加碳。在有孔虫中，优势有孔虫氨表现出快速吸收，估计在3到53小时内吸收了大约1%到7%的添加碳。氨的大量吸收和有孔虫对低底苯丰度和生物量的显著贡献（分别为37%和47%）表明有孔虫在这些沉积物的碳循环中起着重要作用。
We examined the ability of foraminifera in taking up freshly deposited algal carbon in intertidal estuarine sediments. Lyophylized C-13-labelled axenic Chlorella was added to intact sediment cores containing natural benthic biota. The response of the system as a whole was rapid; similar to 5% of the added carbon was respired to CO2 within 6 h. Bacteria assimilated similar to 2 to 4 % of the added carbon within 12 h. Among the foraminifera, the dominant foraminifer Ammonia exhibited rapid uptake and it is estimated that similar to 1 to 7% of the added carbon was ingested within 3 to 53 h. This rapid, substantial uptake by Ammonia and the significant contribution of foraminifera to meiobenthic abundance and biomass (37 and 47% respectively) suggest that foraminifera play an important role in the carbon cycle in these sediments.