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首页> 外文期刊>Marine ecology progress series >Oxygen metabolism of intertidal oyster reefs measured by aquatic eddy covariance
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Oxygen metabolism of intertidal oyster reefs measured by aquatic eddy covariance

机译：用水生涡度协方差测定潮间带牡蛎的氧代谢

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Oyster reef restoration is pursued at numerous places worldwide, yet little is known about how ecosystem function changes as these reefs develop. In this study, we used the noninvasive aquatic eddy covariance technique to measure the in situ oxygen flux of 4 intertidal sites on the Virginia (USA) coast: a natural oyster reef, 2 restoration reefs, and a mudflat. Oyster densities of the 3 reefs were 350, 295, and 186 oysters m(-2). Mean summer values of nighttime oxygen flux (FluxDARK) were -488,-428,-300, and-56 mmol m(-2) d(-1) over the natural reef, 2 restoration reefs, and mudflat, respectively. All 4 sites had smaller daytime vs. nighttime oxygen uptake, with mean summer differences between FluxDARK and FluxLIGHT of 360, 250, 239, and 27 mmol m(-2) d(-1). Light was an important short-term driver of daytime reef oxygen flux due to its effect on microalgal photosynthesis. All 3 oyster reefs were significantly heterotrophic, with summer net ecosystem metabolism values ranging from -157 to -298 mmol m(-2) d(-1). FluxDARK values were similar across the 3 reefs when normalized by density, with values between -1.8 and -2.3 mmol m(-2) d(-1) oyster(-1). This study represents the most detailed measurements to date of in situ oyster reef oxygen flux, and shows that benthic microalgae can significantly impact reef oxygen dynamics. FluxDARK values scale with oyster density, and consequently can be used as a metric for reef restoration success.
机译：全世界的许多地方都在进行牡蛎礁的恢复，但是人们对这些礁的发展对生态系统功能的变化知之甚少。在这项研究中，我们使用无创水生涡流协方差技术来测量弗吉尼亚州（美国）海岸上4个潮间带站点的原位氧气通量：天然牡蛎礁，2个恢复礁和滩涂。 3个珊瑚礁的牡蛎密度为350、295和186牡蛎m（-2）。夏季夏季夜间平均通量（FluxDARK）的平均值分别是在天然礁石，2个复原礁石和滩涂上的-488，-428，-300和-56 mmol m（-2）d（-1）。所有4个站点的白天和夜间氧气摄入量均较小，FluxDARK和FluxLIGHT之间的夏季平均差分别为360、250、239和27 mmol m（-2）d（-1）。由于光对微藻光合作用的影响，光是白天礁石氧气通量的重要短期驱动力。所有3个牡蛎礁均具有明显的异养性，夏季净生态系统代谢值介于-157至-298 mmol m（-2）d（-1）之间。通过密度归一化后，三个珊瑚礁的FluxDARK值相似，在-1.8和-2.3 mmol m（-2）d（-1）牡蛎（-1）之间。这项研究代表了迄今为止牡蛎礁原位氧通量的最详细的测量，并表明底栖微藻可以显着影响礁石氧动力学。 FluxDARK值与牡蛎密度成比例，因此可以用作珊瑚礁恢复成功的指标。

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