A field investigation into the effects of a kelp forest (Macrocystis pyrifera) on coastal hydrodynamics and transport
A field investigation into the effects of a kelp forest (Macrocystis pyrifera) on coastal hydrodynamics and transport
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DOI：
10.1029/2005jc003430
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发表时间：
2007-02
影响因子：
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通讯作者：
Johanna H. Rosman;J. Koseff;S. Monismith;Jamie Grover
中科院分区：
文献类型：
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作者：
Johanna H. Rosman;J. Koseff;S. Monismith;Jamie Grover
[1]Macrocystis pyrifera（巨型海带）森林是温带沿海地区的重要栖息地。流体动力学控制着营养物质、食物颗粒、幼虫和孢子的运输，范围从单个叶片周围的边界层到整个海带森林。我们的测量包括垂直剖面的电流和温度，并同时波测量，在一些不同的位置和周围的海藻森林在圣克鲁斯，加州。我们发现，在该网站的流量是占主导地位的变化在周日和半日的频率。一个垂直剪切跨岸流，与跨岸密度梯度驱动的流一致，被认为是重要的海藻森林和周围的沿海海洋之间的交换。在海带森林，电流减少了一个因素，与表面树冠覆盖，更高频率的内波阻尼，和岸上运输由于波（斯托克斯漂移）估计是类似的幅度，由于电流。海带森林内的Richardson数高于海带森林外的数值，表明海带森林内的水柱通常对平均速度切变产生的湍流是稳定的。
[1] Macrocystis pyrifera (Giant Kelp) forests form important habitats in temperate coastal regions. Hydrodynamics control the transport of nutrients, food particles, larvae and spores at scales ranging from boundary layers around individual blades to entire kelp forests. Our measurements include vertical profiles of current and temperature, and concurrent wave measurements, at a number of different locations in and around a kelp forest at Santa Cruz, California. We find that flow at the site is dominated by variations at diurnal and semidiurnal frequencies. A vertically sheared across-shore flow, consistent with flow driven by an across-shore density gradient, is thought to be important for exchange between the kelp forest and the surrounding coastal ocean. Within the kelp forest, currents are reduced by a factor that correlates with surface canopy coverage, higher frequency internal waves are damped, and onshore transport due to waves (Stokes drift) is estimated to be similar in magnitude to that due to currents. Richardson numbers within the kelp forest are higher than those outside the kelp forest and indicate that the water column within the kelp forest is usually stable to turbulence generation by mean velocity shear.