Elevated alkaline phosphatase activity in a phosphate-replete environment: Influence of sinking particles
Elevated alkaline phosphatase activity in a phosphate-replete environment: Influence of sinking particles
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DOI：
10.1002/lno.10572
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发表时间：
2017-11-01
影响因子：
4.5
通讯作者：
Mahaffey, Claire
中科院分区：
文献类型：
--
作者：
Davis, Clare E.;Mahaffey, Claire
碱性磷酸酶活性（阿帕）传统上是磷酸盐（DIP）限制的代理，因为它是由DIP限制的微生物诱导进入有机磷（OP）库的不稳定酯部分。在这里，我们提出了多年的夏季深度分布的阿帕和酶动力学在DIP充满凯尔特海。我们的研究结果支持了累积的证据，阿帕在OP通过水柱的矿化中具有潜在的广泛作用。阿帕和V-max与深度和DIP呈正相关，总阿帕在温跃层以下（0.93 +/- 0.32 nM Ph（-1））比温跃层以上（0.30 +/- 0.24 nM Ph（-1），p
Alkaline phosphatase activity (APA) is traditionally a proxy for phosphate (DIP)-limitation because it is induced by DIP-limited microbes to access the labile ester fraction of the organic phosphorus (OP) pool. Here, we present multi-year summertime depth distributions of APA and enzyme kinetics in the DIP-replete Celtic Sea. Our findings support the cumulating body of evidence that APA has a potentially widespread role in OP remineralization through the water column. APA and V-max were positively correlated with depth and DIP, with total APA being threefold higher below (0.93 +/- 0.32 nM P h(-1)) compared to above the thermocline (0.30 +/- 0.24 nM P h(-1), p