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首页> 外文期刊>Marine ecology progress series >Does the size of the microphytobenthic biofilm on intertidal mudflats depend on the available photosynthetic biomass?
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Does the size of the microphytobenthic biofilm on intertidal mudflats depend on the available photosynthetic biomass?

机译：潮间带滩涂生物底栖生物膜的大小是否取决于可用的光合生物量？

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摘要

Many scientists consider that the top centimetre of the sediment on intertidal mudflats contains the photosynthetic competent biomass (PCB). Part of this biomass migrates upward to the surface of the sediment during diurnal emersion periods to form a temporary biofilm: the photosynthetic active biomass (PAB). The present study tests the hypothesis that the size of the biofilm (PAB) is functionally dependent on PCB. Therefore, we have plotted PAB as a function of PCB for a range of different environmental conditions: 3 seasons and 5 tidal situations, representing a total of 600 cores. This investigation points out that, in spring and autumn, there was a simple linear relationship between PAB and PCB, thus indicating that the maximum size of the biofilm represents a constant fraction (between 13 and 18%) of the available biomass in the top centimetre of the mud. The relationship was more complex in winter, but the general trend remained the same. The dependence of the size of the biofilm on PCB might have important ecological implications in terms of primary productivity and also the monitoring of intertidal microalgal biomass at large spatial scales.
机译：许多科学家认为，潮间带滩涂沉积物的顶部厘米包含光合有效生物量（PCB）。在昼夜出现期间，这种生物质的一部分向上迁移到沉积物表面，形成一个临时生物膜：光合作用活性生物质（PAB）。本研究检验了生物膜（PAB）的尺寸在功能上取决于PCB的假设。因此，我们针对一系列不同的环境条件（3个季节和5个潮汐情况）将PAB绘制为PCB的函数，代表了600个核心。这项研究指出，在春季和秋季，PAB和PCB之间存在简单的线性关系，因此表明生物膜的最大尺寸代表了顶部厘米中可用生物量的恒定部分（13％至18％）。的泥冬季这种关系更为复杂，但总体趋势保持不变。生物膜大小对PCB的依赖性可能对初级生产力和潮汐微藻生物量在大空间尺度上的监测具有重要的生态意义。

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